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In 2015, Pr Laila Mandi has been awarded the Islamic Development Bank (IDB) prize for Women’s Contribution to Development in recognition of her outstanding research work and contribution to the Water Resources Management.
Islamic Development Bank Prize (IDB)
University Educator/Researcher
01 April 1994 - 31 August 2021
Mrs Laila Mandi is currently Professor of Water and Environmental Sciences at Cadi Ayyad University, Marrakech (Morocco). In 2001, she was nominated as a National Coordinator of the Pole of Competences on “Water and Environment” (PC2E). In 2008, she was nominated as a Director of the National Centre for Studies and Research on Water and Energy at Cadi Ayyad University. She has coordinated several funded research projects at different levels, namely (i) national, ii) bilateral cooperation with different countries (Germany, Belgium, Spain, France, Japan, Jordan, Tunisia, Egypt, Algeria, etc.), and iii) European projects (PURATREAT, MELIA, SOWAEUMED, WATERBIOTECH, TREASURE 2, NORIA, FRAME, etc.). Within the research projects, she has supervised more than 30 PhD theses. She has published more than 150 peer-reviewed scientific papers and book chapters. Since 2014, she has been a member of the College of Qualified Personalities at the France Water Academy. In 2015, she was awarded the Islamic Development Bank (IDB) prize for Women’s Contribution to Development in recognition of her outstanding research work and contribution to water resource management. In 2017, she became a member of the network of Mediterranean Experts on Climate and Environmental Change (MedECC).
The aim of the current work is to evaluate the effect of a mixture of olive mill wastewater (OMWW) and urban wastewater (UW) on constructed wetland (CW) substrate physicochemical parameters, and to study the abundance and behaviour of microbial community at different depths. In this regard, substrate samples were investigated at three depth levels (0–10 cm, 10–20 cm and 20–30 cm) inside a pilot scale CW treating the mixture. In order to compare the obtained results with the conventional case, a control (CW pilot plant treating only UW) was implemented. Result shows that an increase in electrical conductivity (from 0.134 to 0.222 mS/cm in 0–10 cm and from 0.131 to 0.283 mS/cm in 10–20 cm), total dissolved salts (from 65.45 to 108.67 mg/kg in 0–10cm and from 64.33 to 135.3 mg/kg in 10–20 cm), total organic carbon (from 0.86 to 6.84%), total nitrogen (from 0.1 mg/kg to 0.45, 0.43 and 0.41 mg/kg, in 0–10 cm, 10–20 cm and 20–30 cm respectively) and C/N ratio take place in the substrate after the treatment of the mixture. As for the microbiological parameters, treating the mixture in a CW results in an increase in the yeast and fungi which may optimize the biodegradation of compounds such as polyphenols that are non-easily degraded.
Ayoub El Ghadraoui; Naaila Ouazzani; Chaima Saf; Abdelaali Ahmali; Abdessamed Hejjaj; Faissal Aziz; Massimo Del Bubba; Laila Mandi. Behaviour of physicochemical and microbiological characteristics of vertical flow constructed wetland substrate after treating a mixture of urban and olive mill wastewaters. Environmental Science and Pollution Research 2021, 1 -13.
AMA StyleAyoub El Ghadraoui, Naaila Ouazzani, Chaima Saf, Abdelaali Ahmali, Abdessamed Hejjaj, Faissal Aziz, Massimo Del Bubba, Laila Mandi. Behaviour of physicochemical and microbiological characteristics of vertical flow constructed wetland substrate after treating a mixture of urban and olive mill wastewaters. Environmental Science and Pollution Research. 2021; ():1-13.
Chicago/Turabian StyleAyoub El Ghadraoui; Naaila Ouazzani; Chaima Saf; Abdelaali Ahmali; Abdessamed Hejjaj; Faissal Aziz; Massimo Del Bubba; Laila Mandi. 2021. "Behaviour of physicochemical and microbiological characteristics of vertical flow constructed wetland substrate after treating a mixture of urban and olive mill wastewaters." Environmental Science and Pollution Research , no. : 1-13.
Cyanobacteria blooms occur frequently in freshwaters around the world. Some can produce and release toxic compounds called cyanotoxins, which represent a danger to both the environment and human health. Microcystin-LR (MC-LR) is the most toxic variant reported all over the world. Conventional water treatment methods are expensive and require specialized personnel and equipment. Recently, a multi-soil-layering (MSL) system, a natural and low-cost technology, has been introduced as an attractive cost-effective, and environmentally friendly technology that is likely to be an alternative to conventional wastewater treatment methods. This study aims to evaluate, for the first time, the efficiency of MSL eco-technology to remove MC-LR on a laboratory scale using local materials. To this end, an MSL pilot plant was designed to treat distilled water contaminated with MC-LR. The pilot was composed of an alternation of permeable layers (pozzolan) and soil mixture layers (local sandy soil, sawdust, charcoal, and metallic iron on a dry weight ratio of 70, 10, 10, and 10%, respectively) arranged in a brick-layer-like pattern. MSL pilot was continuously fed with synthetic water containing distilled water contaminated with increasing concentrations of MC-LR (0.18–10 µg/L) at a hydraulic loading rate (HLR) of 200 L m−2 day−1. The early results showed MC-LR removal of above 99%. Based on these preliminary results, the multi-soil-layering eco-technology could be considered as a promising solution to treat water contaminated by MC-LR in order to produce quality water for irrigation or recreational activities.
Roseline Aba; Richard Mugani; Abdessamad Hejjaj; Nelly Brugerolle de Fraissinette; Brahim Oudra; Naaila Ouazzani; Alexandre Campos; Vitor Vasconcelos; Pedro Carvalho; Laila Mandi. First Report on Cyanotoxin (MC-LR) Removal from Surface Water by Multi-Soil-Layering (MSL) Eco-Technology: Preliminary Results. Water 2021, 13, 1403 .
AMA StyleRoseline Aba, Richard Mugani, Abdessamad Hejjaj, Nelly Brugerolle de Fraissinette, Brahim Oudra, Naaila Ouazzani, Alexandre Campos, Vitor Vasconcelos, Pedro Carvalho, Laila Mandi. First Report on Cyanotoxin (MC-LR) Removal from Surface Water by Multi-Soil-Layering (MSL) Eco-Technology: Preliminary Results. Water. 2021; 13 (10):1403.
Chicago/Turabian StyleRoseline Aba; Richard Mugani; Abdessamad Hejjaj; Nelly Brugerolle de Fraissinette; Brahim Oudra; Naaila Ouazzani; Alexandre Campos; Vitor Vasconcelos; Pedro Carvalho; Laila Mandi. 2021. "First Report on Cyanotoxin (MC-LR) Removal from Surface Water by Multi-Soil-Layering (MSL) Eco-Technology: Preliminary Results." Water 13, no. 10: 1403.
Morocco is the leading producer of phosphate and its derivatives in the world with a total production of 35 Mt. However, the extraction and the valorization of this mine generate huge quantities of phosphate washing waste clay (PHWWC) that constitute a main environmental and economic concern. To facilitate this waste clay storage and handling, it is necessary to decrease its moisture content that represents 80% of PHWWC. The present paper is devoted to studying the conductive drying of PHWWC. Drying experiments were conducted in a laboratory pilot. Afterwards, the experiment results were implemented in a one-dimensional numerical model of heat and mass transfer in a porous media to identify the drying parameters and performances. It was found that most of the water contained in PHWWC is free water that is removed with a constant drying rate. The volume reduction with a marked cracks phenomenon attained 65% without any significant effect of drying temperature and sample thickness. The effective moisture diffusivity of the PHWWC for a conductive drying process is ranged between 10−9 and 1.1 × 10−8 m2·s−1. The thermal efficiency of the drying system is up to 86%. The results could be used for the purpose of design and scale-up of the industrial dryer based on laboratory-scale experiments.
Fatiha Berroug; Yassir Bellaziz; Naaila Ouazzani; Fatima Ait Nouh; Abdessamad Hejjaj; Lahcen Boukhattem; Ali Idlimam; Hamid El Mahmoudi; Laila Mandi. Experimental and Numerical Investigations on Conductive Drying of Phosphate Washing Waste Clay. Minerals 2021, 11, 482 .
AMA StyleFatiha Berroug, Yassir Bellaziz, Naaila Ouazzani, Fatima Ait Nouh, Abdessamad Hejjaj, Lahcen Boukhattem, Ali Idlimam, Hamid El Mahmoudi, Laila Mandi. Experimental and Numerical Investigations on Conductive Drying of Phosphate Washing Waste Clay. Minerals. 2021; 11 (5):482.
Chicago/Turabian StyleFatiha Berroug; Yassir Bellaziz; Naaila Ouazzani; Fatima Ait Nouh; Abdessamad Hejjaj; Lahcen Boukhattem; Ali Idlimam; Hamid El Mahmoudi; Laila Mandi. 2021. "Experimental and Numerical Investigations on Conductive Drying of Phosphate Washing Waste Clay." Minerals 11, no. 5: 482.
The quality of effluents from wastewater treatment plants still challenging especially in underprivileged rural areas where water resources are mostly affected by pollution, depletion and excessive exploitation. Thus, the prediction of phosphorus removal is one of the most important tasks in the management of wastewater effluent. Predictive model accuracy is crucial for safe reuse of treated water for public health and the environment. However, linear models that use a high dimensional dataset may be unable to build accurate and interpretable models. To address this complexity, the current study evaluates the effect of hydraulic retention time (HRT) on the removal of orthophosphates (PO4–P) and total phosphorus (TP) by the multi-soil-layering (MSL) eco-friendly technology. In addition, it attempts to predict this removal from domestic wastewater using a combined approach based on feature selection technique and gradient boosting machine algorithm (GBM). Sixteen physicochemical and bacterial indicators were monitored for a one-year period. The results show that the HRT impact significantly (p < 0.01) the removal of phosphorus content by the MSL system. The HRT, pH, PO4–P and TP were suggested relevant for predicting the removal of TP, while HRT and PO4–P were sufficient for predicting the removal rate of PO4–P. The analysis of accuracy using the validation dataset demonstrates that GBM models have high credibility as they achieve an R² > 0.92, while the analysis of sensitivity reveals that the HRT was the most important factor affecting phosphorus removal in the MSL system. In addition, the modeling results show that the GBM model has proven to be useful for predicting pollutant removal in the MSL technology and investigating its behavior.
Sofyan Sbahi; Naaila Ouazzani; Abderrahmane Lahrouni; Abdessamed Hejjaj; Laila Mandi. Gradient Boosting Machine for Phosphorus Removal Prediction in Multi-Soil-Layering (MSL) system operated in a rural area . 2021, 1 .
AMA StyleSofyan Sbahi, Naaila Ouazzani, Abderrahmane Lahrouni, Abdessamed Hejjaj, Laila Mandi. Gradient Boosting Machine for Phosphorus Removal Prediction in Multi-Soil-Layering (MSL) system operated in a rural area . . 2021; ():1.
Chicago/Turabian StyleSofyan Sbahi; Naaila Ouazzani; Abderrahmane Lahrouni; Abdessamed Hejjaj; Laila Mandi. 2021. "Gradient Boosting Machine for Phosphorus Removal Prediction in Multi-Soil-Layering (MSL) system operated in a rural area ." , no. : 1.
The aim of the current work is to evaluate the effect of a mixture of olive mill wastewater (OMWW) and urban wastewater (UW) on constructed wetland (CW) substrate physicochemical parameters and to study the abundance and behaviour of microbial community at different depths. In this regard, substrate samples were investigated at tree depth levels (0-10cm, 10-20cm and 20-30cm) inside a pilot scale CW treating the mixture. In order to compare the obtained results treating the mixture with the conventional case, a control (CW pilot plant treating only UW) was implemented. Result shows that an increase in electrical conductivity (from 134.78 to 222.33µS/cm in 0-10cm and from 131.25 to 283.33 µS/cm in 10-20cm), total dissolved salts (from 65.45 to 108.67 mg/kg in 0-10cm and from 64.33 to 135.3 mg/kg in 10–20 cm), total organic carbon (from 0.86 to 6.84%), total nitrogen (from 0.1 mg/kg to 0.45, 0.43 and 0.41 mg/kg, in 0-10cm, 10-20cm and 20-30cm respectively), and C/N ratio occurred in the substrate after the treatment of the mixture. As for the microbiological parameters, treating the mixture by CW results in the increasing of yeast and fungi concentration in the substrate which contributes probably to optimize the biodegradation of non-easily degraded organic compound such as polyphenol.
Ayoub EL Ghadraoui; Naaila Ouazzani; Chaima Saf; Abdelaali Ahmali; Abdessamed Hejjaj; Faissal Aziz; Massimo DEL Bubba; Laila Mandi. Behaviour of physicochemical and microbiological characteristics of vertical flow constructed wetland substrate after treating a mixture of urban and Olive Mill Wastewaters. 2021, 1 .
AMA StyleAyoub EL Ghadraoui, Naaila Ouazzani, Chaima Saf, Abdelaali Ahmali, Abdessamed Hejjaj, Faissal Aziz, Massimo DEL Bubba, Laila Mandi. Behaviour of physicochemical and microbiological characteristics of vertical flow constructed wetland substrate after treating a mixture of urban and Olive Mill Wastewaters. . 2021; ():1.
Chicago/Turabian StyleAyoub EL Ghadraoui; Naaila Ouazzani; Chaima Saf; Abdelaali Ahmali; Abdessamed Hejjaj; Faissal Aziz; Massimo DEL Bubba; Laila Mandi. 2021. "Behaviour of physicochemical and microbiological characteristics of vertical flow constructed wetland substrate after treating a mixture of urban and Olive Mill Wastewaters." , no. : 1.
Microcystins (MCs) produced in eutrophic waters may decrease crop yield, enter food chains and threaten human and animal health. The main objective of this research was to highlight the role of rhizospheric soil microbiota to protect faba bean plants from MCs toxicity after chronic exposure. Faba bean seedlings were grown in pots containing agricultural soil, during 1 month under natural environmental conditions of Marrakech city in Morocco (March–April 2018) and exposed to cyanobacterial extracts containing up to 2.5 mg·L−1 of total MCs. Three independent exposure experiments were performed (a) agricultural soil was maintained intact “exposure experiment 1”; (b) agricultural soil was sterilized “exposure experiment 2”; (c) agricultural soil was sterilized and inoculated with the rhizobia strain Rhizobium leguminosarum RhOF34 “exposure experiment 3”. Overall, data showed evidence of an increased sensitivity of faba bean plants, grown in sterilized soil, to MCs in comparison to those grown in intact and inoculated soils. The study revealed the growth inhibition of plant shoots in both exposure experiments 2 and 3 when treated with 2.5 mg·L−1 of MCs. The results also showed that the estimated daily intake (EDI) of MCs, in sterilized soil, exceeded 2.18 and 1.16 times the reference concentrations (0.04 and 0.45 µg of microcysin-leucine arginine (MC-LR). Kg−1 DW) established for humans and cattle respectively, which raises concerns about human food chain contamination.
El Redouane; Majida Lahrouni; José Martins; Soukaina El Amrani Zerrifi; Loubna Benidire; Mountassir Douma; Faissal Aziz; Khalid Oufdou; Laila Mandi; Alexandre Campos; Vitor Vasconcelos; Brahim Oudra. Protective Role of Native Rhizospheric Soil Microbiota Against the Exposure to Microcystins Introduced into Soil-Plant System via Contaminated Irrigation Water and Health Risk Assessment. Toxins 2021, 13, 118 .
AMA StyleEl Redouane, Majida Lahrouni, José Martins, Soukaina El Amrani Zerrifi, Loubna Benidire, Mountassir Douma, Faissal Aziz, Khalid Oufdou, Laila Mandi, Alexandre Campos, Vitor Vasconcelos, Brahim Oudra. Protective Role of Native Rhizospheric Soil Microbiota Against the Exposure to Microcystins Introduced into Soil-Plant System via Contaminated Irrigation Water and Health Risk Assessment. Toxins. 2021; 13 (2):118.
Chicago/Turabian StyleEl Redouane; Majida Lahrouni; José Martins; Soukaina El Amrani Zerrifi; Loubna Benidire; Mountassir Douma; Faissal Aziz; Khalid Oufdou; Laila Mandi; Alexandre Campos; Vitor Vasconcelos; Brahim Oudra. 2021. "Protective Role of Native Rhizospheric Soil Microbiota Against the Exposure to Microcystins Introduced into Soil-Plant System via Contaminated Irrigation Water and Health Risk Assessment." Toxins 13, no. 2: 118.
This study aimed to assess the effectiveness of the phytostabilization ability of the native Moroccan plant Citrullus colocynthis on the neutralization of soil acidity and stabilization of metallic trace elements (MTEs) assisted by marble waste. Mine tailings (MT) collected from an abandoned polymetallic site were mixed with powdered marble (PM) using different mixing ratios (%): (MTPM25), (MTPM50), (MTPM75), and agricultural soil (AS) acting as the control. Seeds of C. colocynthis were selected and planted under greenhouse conditions. Growth parameters were measured, and the metal concentrations in substrates and plant tissues were analyzed. The greenhouse results revealed that the growth parameters of C. colocynthis in the experimental treatments were significantly (p≤0.05) lower than those in agricultural soil. The growth of C. colocynthis significantly (p≤0.05) decreased as the ratio of powdered marble increased. The greatest increase in plant biomass was observed in the MTPM25, followed by MTPM50 and MTPM75. Some phytotoxic effects on plants were observed in MPTM75. The concentrations of Zn, Cu, Pb, and Cd in C. colocynthis roots were significantly (p≤0.05) higher than those of shoots, with maximum values of 112.98 mg kg-1, 201.3 mg kg-1, 201.2 mg kg-1, and 40.03 mg kg-1, respectively. This is a typical characteristic of accumulator plants and maybe one of the tolerance mechanisms. Plants in the experimental treatments were characterized by TF<1 and BCF<1, which indicate that C. colocynthis could be useful for phytostabilization strategies. Our study demonstrates that the phytostabilization by C. colocynthis assisted by powdered marble could represent a successful and environmentally friendly strategy to remediate acidic polymetallic sites.
Laila Midhat; Naaila Ouazzani; Abdessamed Hejjaj; Ahmed Ouhammou; Laila Mandi. Assisted Phytostabilization of Acidic Polymetallic Mine Tailings Using Marble Waste and Native Plant Citrullus colocynthis: Effect on Soil, Plant, and Metal Uptake. Recent Progress in Materials 2020, 03, 1 -1.
AMA StyleLaila Midhat, Naaila Ouazzani, Abdessamed Hejjaj, Ahmed Ouhammou, Laila Mandi. Assisted Phytostabilization of Acidic Polymetallic Mine Tailings Using Marble Waste and Native Plant Citrullus colocynthis: Effect on Soil, Plant, and Metal Uptake. Recent Progress in Materials. 2020; 03 (03):1-1.
Chicago/Turabian StyleLaila Midhat; Naaila Ouazzani; Abdessamed Hejjaj; Ahmed Ouhammou; Laila Mandi. 2020. "Assisted Phytostabilization of Acidic Polymetallic Mine Tailings Using Marble Waste and Native Plant Citrullus colocynthis: Effect on Soil, Plant, and Metal Uptake." Recent Progress in Materials 03, no. 03: 1-1.
This study aims to find the most accurate machine learning algorithms as compared to linear regression for prediction of fecal coliforms (FC) in the effluent of a multi‐soil‐layering (MSL) system and to identify the input variables affecting the FC removal from domestic wastewater. The effluent quality of two different designs of the MSL system was evaluated and compared for several parameters for potential reuse in agriculture. The first system consisted of a single stage (MSL‐SS) and the second system possessed two‐stage (MSL‐TS). The concentrations of FC in the effluent of the MSL‐TS system was estimated by three machine learning algorithms, including artificial neural network (ANN), Cubist, and multiple linear regression (MLR). The accuracy of the models was measured by comparing the real and the predicted values. Significant (p < 0.001) improvements were noted for the removal of pollutants by the MSL‐TS system compared to the MSL‐SS system. Overall, water quality parameters investigated complied with FAO irrigation standards. The predictive performance of the models has been compared and evaluated using several metrics criteria. The results revealed that the ANN model yielded a superior predictive performance with (R2 = 0.953), followed by the Cubist model with (R2 = 0.946), and the MLR technique with (R2 = 0.481). Based on the accurate model (ANN), the degree of influence of each predictor was investigated, and the results show that total suspended solids and pH have proved to be more useful for predicting FC concentrations. This article is protected by copyright. All rights reserved
Sofyan Sbahi; Naaila Ouazzani; Abdessamed Hejjaj; Laila Mandi. Neural network and cubist algorithms to predict fecal coliform content in treated wastewater by multi‐soil‐layering system for potential reuse. Journal of Environmental Quality 2020, 50, 144 -157.
AMA StyleSofyan Sbahi, Naaila Ouazzani, Abdessamed Hejjaj, Laila Mandi. Neural network and cubist algorithms to predict fecal coliform content in treated wastewater by multi‐soil‐layering system for potential reuse. Journal of Environmental Quality. 2020; 50 (1):144-157.
Chicago/Turabian StyleSofyan Sbahi; Naaila Ouazzani; Abdessamed Hejjaj; Laila Mandi. 2020. "Neural network and cubist algorithms to predict fecal coliform content in treated wastewater by multi‐soil‐layering system for potential reuse." Journal of Environmental Quality 50, no. 1: 144-157.
A large quantity of leachate is generated during municipal solid waste collection operation and in landfills due to the large amount of organic waste and high humidity. The content of medium chain fatty acids (MCFAs) in the leachate is a low cost feedstock for bio-based chemical and fuel production processes. The aim of this study is to investigate the MCFA production potential of three leachate ages through chain elongation process under uncontrolled pH batch test. Moreover, the effect of using different external electron donors (ethanol, methanol and a mixture of both) is studied. The experiment consists of characterizing the samples then adding external electron donors with a specific ratio to leachate samples under mesophilic temperature. For this investigation, also a statistical analysis is done, which shows the production of MCFAs is highly influenced by leachate age. The results indicate that the production of even-numbered acids increase from 600 to 1,000 mg/L by the end of the ethanol chain elongation experiment for young leachate. However, a higher MCFA production of more than 1,000 mg/L is achieved by using the mixture of methanol and ethanol as electron donor. Furthermore, all methanol chain elongation experiments lead to an odd-numbered production of MCFAs, such as pentanoic and heptanoic acids. These results confirm the potential improvement of MCFA production from leachate through choosing the optimal leachate age and electron donor. Overall, producing MCFAs from leachate is a good example of circular bio-economy because waste is used to produce biochemicals, which closes the material cycle.
Lamia Saadoun; Alessio Campitelli; Jan Kannengiesser; Daniel Stanojkovski; Abdelhafid El Alaoui El Fels; Laila Mandi; Naaila Ouazzani. Potential of medium chain fatty acids production from municipal solid waste leachate: Effect of age and external electron donors. Waste Management 2020, 120, 503 -512.
AMA StyleLamia Saadoun, Alessio Campitelli, Jan Kannengiesser, Daniel Stanojkovski, Abdelhafid El Alaoui El Fels, Laila Mandi, Naaila Ouazzani. Potential of medium chain fatty acids production from municipal solid waste leachate: Effect of age and external electron donors. Waste Management. 2020; 120 ():503-512.
Chicago/Turabian StyleLamia Saadoun; Alessio Campitelli; Jan Kannengiesser; Daniel Stanojkovski; Abdelhafid El Alaoui El Fels; Laila Mandi; Naaila Ouazzani. 2020. "Potential of medium chain fatty acids production from municipal solid waste leachate: Effect of age and external electron donors." Waste Management 120, no. : 503-512.
Many indicators are involved in monitoring water quality. For instance, the fecal indicator bacteria are extremely important to detect the water quality. For this purpose, to better predict the total coliforms at the outlet of a Multi-Soil-Layering (MSL) system designed to treat domestic wastewater in rural areas, a neural network model has been developed and compared with linear regression model. The data was collected from the raw and treated wastewater of a three MSL systems during a one-year period in rural village, in Al-Haouz Province, Morocco. Fifteen physicochemical and bacteriological variables have undergone feature selection to select the best ones for predicting the total coliforms concentration in the effluent of MSL system. Furthermore, 80% of the available dataset were used to train and optimize the neural model using repeated cross validation technique. The remaining part (20%) was used to test the developed model. The neural network indicated excellent results compared to the linear regression. The optimal model was a neural network with one hidden layer and 11 neurons, where the R2 was about 97%. The importance analysis of each predictor was established, and it was found that pH and total suspended solids had the greatest influence on the total coliforms removal.
Sofyan Sbahi; Naaila Ouazzani; Lahbib Latrach; Abdessamed Hejjaj; Laila Mandi. Predicting the concentration of total coliforms in treated rural domestic wastewater by multi-soil-layering (MSL) technology using artificial neural networks. Ecotoxicology and Environmental Safety 2020, 204, 111118 .
AMA StyleSofyan Sbahi, Naaila Ouazzani, Lahbib Latrach, Abdessamed Hejjaj, Laila Mandi. Predicting the concentration of total coliforms in treated rural domestic wastewater by multi-soil-layering (MSL) technology using artificial neural networks. Ecotoxicology and Environmental Safety. 2020; 204 ():111118.
Chicago/Turabian StyleSofyan Sbahi; Naaila Ouazzani; Lahbib Latrach; Abdessamed Hejjaj; Laila Mandi. 2020. "Predicting the concentration of total coliforms in treated rural domestic wastewater by multi-soil-layering (MSL) technology using artificial neural networks." Ecotoxicology and Environmental Safety 204, no. : 111118.
In the last decade, pathogenic bacteria and organic micropollutants have become a major issue in the water purification process. Heterogeneous photocatalysis is a low-cost and an ecofriendly process, which provides a sustainable solution for water treatment and its utilization in rural areas. In this context, we studied the generation and the surface engineering of polyacrylonitrile (PAN)/goethite composite nanofibers for photocatalytic water remediation under visible-light illumination. The photocatalytic activity was evaluated for dye (methylene blue) degradation and bacteria inactivation, as contaminant models, of the composite nanofibers. The PAN/goethite nanofibers were elaborated by an electrospinning technique, and the morphology and the composition, before and after spin coating, were investigated by Scanning Electron Microscopy (SEM) and Energy Dispersive X-Ray (EDX). The results showed partially intercalated structures of the PAN/goethite Composite-nano-fiber (CNF) were identified by SEM and EDX analysis. The composite nanofibers exhibited high photoefficiency upon dye bleaching (only 10% left after 5 h of illumination) and bacterial deactivation Escherichia coli and Clostridium perfringens (4.4- and 3.5-fold, respectively, in less than 5 h). The steadiness and pliancy of the generated nanofibers provide a promising application in the continuous flow system.
Faissal Aziz; Mounir El Achaby; Khalid Aziz; Naaila Ouazzani; Laila Mandi; Mohamed Nawfal Ghazzal. Nanocomposite Fiber Based on Natural Material for Water Disinfection under Visible Light Irradiation. Nanomaterials 2020, 10, 1 .
AMA StyleFaissal Aziz, Mounir El Achaby, Khalid Aziz, Naaila Ouazzani, Laila Mandi, Mohamed Nawfal Ghazzal. Nanocomposite Fiber Based on Natural Material for Water Disinfection under Visible Light Irradiation. Nanomaterials. 2020; 10 (6):1.
Chicago/Turabian StyleFaissal Aziz; Mounir El Achaby; Khalid Aziz; Naaila Ouazzani; Laila Mandi; Mohamed Nawfal Ghazzal. 2020. "Nanocomposite Fiber Based on Natural Material for Water Disinfection under Visible Light Irradiation." Nanomaterials 10, no. 6: 1.
The emergence and spread of SARS-CoV-2 responsible for COVID-19 disease are considered as a major threat to human health since WHO declared COVID-19 outbreak a global pandemic. In recent studies, scientists confirmed the presence of SARS-CoV-2 RNA in feces of COVID-19 patients and wastewater. In several areas, particularly low-income countries, hospital effluents are not disinfected or pretreated and they are mostly discharged into urban sewerage systems reaching wastewater treatment plants depending if it exists or not, consequently several infectious agents could be developed such as Coronavirus COVID-19 causing significant environmental and health risks. Several researchers across the world suggested that wastewater surveillance could be a sensitive tool to monitor the circulation of the virus in the population and may represent a complementary approach to measure the presence and the prevalence of current infectious disease when the capacity for clinical testing is limited. Only a few studies were done on the survival of Coronaviruses in wastewater and still there is limited information on its transmission potential through the environment. Taking into account the current situation, there is an urgent need to consider and assess the transmission of Coronavirus (COVID-19) via hospital sewage and wastewater. Further researches are imperative to fill the knowledge gaps in COVID-19 behavior in hospital and urban sewage, and wastewater treatment plants, identify the safety measures and better manage the pandemic phenomena.
Laila Mandi. Urgent Needs to Consider and Assess the Transmission of Coronavirus (COVID-19) via Hospital Sewage and Wastewater. Journal of Clinical and Experimental Investigations 2020, 11, em00745 .
AMA StyleLaila Mandi. Urgent Needs to Consider and Assess the Transmission of Coronavirus (COVID-19) via Hospital Sewage and Wastewater. Journal of Clinical and Experimental Investigations. 2020; 11 (3):em00745.
Chicago/Turabian StyleLaila Mandi. 2020. "Urgent Needs to Consider and Assess the Transmission of Coronavirus (COVID-19) via Hospital Sewage and Wastewater." Journal of Clinical and Experimental Investigations 11, no. 3: em00745.
The present study aims to investigate key parameters and mechanisms affecting Cr3+ removal from tanning wastewater using phosphate mine waste (PW) as adsorbent in batch mode. The initial Cr3+ concentration was 3920 mg.L-1. The maximum removal capacity of Cr3+ was found to be 97.23 mg.g-1 using 40 g.L-1 of PW at 50 °C and at 200 rpm of stirring speed. Thermodynamic studies indicated that Cr3+ sorption is endothermic reaction of a physico-chemical adsorption process. Kinetic data were satisfactorily described by a pseudo-second order model. Cr3+ removal is probably involving several mechanisms: PW surface dissolution, precipitation, co-precipitation, ion exchange and adsorption. The chromium sorption seems modifying the crystalline structure of the adsorbent. Adsorption isotherm was described by Freundlich, Langmuir and Redlich-Peterson models. But statistically, Freundlich fit better the experimental data. Five error functions were used to check this result. Treatment of chromium effluent using PW as adsorbent can also eliminate more than 60% of organic matter and then can be considered as an effective biomaterial for tanning wastewater treatment.
Amal Oumani; Laila Mandi; Fatima Berrekhis; Naaila Ouazzani. Removal of Cr3+ from tanning effluents by adsorption onto phosphate mine waste: Key parameters and mechanisms. Journal of Hazardous Materials 2019, 378, 120718 .
AMA StyleAmal Oumani, Laila Mandi, Fatima Berrekhis, Naaila Ouazzani. Removal of Cr3+ from tanning effluents by adsorption onto phosphate mine waste: Key parameters and mechanisms. Journal of Hazardous Materials. 2019; 378 ():120718.
Chicago/Turabian StyleAmal Oumani; Laila Mandi; Fatima Berrekhis; Naaila Ouazzani. 2019. "Removal of Cr3+ from tanning effluents by adsorption onto phosphate mine waste: Key parameters and mechanisms." Journal of Hazardous Materials 378, no. : 120718.
Tawfik El Moussaoui; Said Wahbi; Laila Mandi; Salvatore Masi; Naaila Ouazzani. Reuse study of sustainable wastewater in agroforestry domain of Marrakesh city. Journal of the Saudi Society of Agricultural Sciences 2019, 18, 288 -293.
AMA StyleTawfik El Moussaoui, Said Wahbi, Laila Mandi, Salvatore Masi, Naaila Ouazzani. Reuse study of sustainable wastewater in agroforestry domain of Marrakesh city. Journal of the Saudi Society of Agricultural Sciences. 2019; 18 (3):288-293.
Chicago/Turabian StyleTawfik El Moussaoui; Said Wahbi; Laila Mandi; Salvatore Masi; Naaila Ouazzani. 2019. "Reuse study of sustainable wastewater in agroforestry domain of Marrakesh city." Journal of the Saudi Society of Agricultural Sciences 18, no. 3: 288-293.
The current study was carried out to test the removal of nitrogen and phosphorus from olive mill wastewater (OMW) by combination of sand filter and a mixture of aquatic plants (Phragmites australis, Typha latifolia and Arundo donax). The experimental pilot was composed of two serial systems: sand filter followed by vertical flow constructed wetlands (VF-CWs). The sand filter was filled with 50 cm of sand and 10 cm of gravel in the top and the bottom of the filter. The second step of the treatment consists of a tank (1 × 1 × 1 m3) filled with 20 cm of gravel and 60 cm of soil, planted with a mixture of aquatic plants at a density of 8 young plants/m2 for each plant and irrigated twice in the week by 20L of preliminary filtered OMW. During all experiment, OMW was diluted with domestic wastewater at a ration 1/1 (v/v). Mean diluted OMW concentrations were 2.05 g/L, 1.52 g/L, 1.94 mg/L, 1.70 mg/L, 0.22 g/L, 0.30 g/L, 26.78 g/L and 20.47 g/L for TKN-N, NH4+-N, NO2−-N, NO3−N, ortho-phosphate (OP), Total phosphorus (PT) total COD and dissolved COD respectively. Despite the rather high influent concentrations, the performance of the sand filter was very effective since it achieved average removals of about 60.4%, 74.4%, 80.61%, 97.85%, 96.45%, 79.75% and 76.75% for NTK, NH4+, NO3−, PO43−, PT total COD and dissolved COD respectively. The presence of aquatic plants was more efficient in removing of nutrients and organic load. The average elimination of experimental system (sand filter + VF-CWs) in terms of flow was 62.48% for NTK, 90.43% for NH4+, 77.25% for NO3−, 98.51% for PO43−, 97.53% for PT and 99.05% for total COD. In general, this study shows potential application of the experimental system to achieve nutrient and COD removal from OMW. Although the percent removal of organic matter and nutrients from OMW was very high, final OMW concentrations remained high, thus preventing their use for irrigation or immediate disposal into the environment.
Mounia Achak; Wafaa Boumya; Naaila Ouazzani; Laila Mandi. Preliminary evaluation of constructed wetlands for nutrients removal from olive mill wastewater (OMW) after passing through a sand filter. Ecological Engineering 2019, 136, 141 -151.
AMA StyleMounia Achak, Wafaa Boumya, Naaila Ouazzani, Laila Mandi. Preliminary evaluation of constructed wetlands for nutrients removal from olive mill wastewater (OMW) after passing through a sand filter. Ecological Engineering. 2019; 136 ():141-151.
Chicago/Turabian StyleMounia Achak; Wafaa Boumya; Naaila Ouazzani; Laila Mandi. 2019. "Preliminary evaluation of constructed wetlands for nutrients removal from olive mill wastewater (OMW) after passing through a sand filter." Ecological Engineering 136, no. : 141-151.
Following a rising demand for both environment friendly technologies and bio-active compounds, this study aims to develop a bio-refinery concept that uses solar radiation instead of fossil source derived energies to essential oils, pectin, and polyphenols extracts from orange peels. Hydro-distillation system has been used for extraction of volatiles (essential oils) and non-volatiles (polyphenols and pectins) compounds using solar or conventional fossil energy. It was found that the essential oil quality and yield were similar; however, the extraction time was 36.8% higher for the conventional procedure. Total polyphenol content (TPC) and total flavonoid content (TFC) of the peels before and after extraction as well as in the hydro-distillation water showed that a higher amount of compounds were preserved after the application of solar extraction procedure. Indeed, 75% of the TPC and 70% of the TFC after conventional and 77% of the TPC and 77.8% of the TFC respectively after solar extraction were still found in the orange peels. Both narirutin and hesperidin, main flavonoids present in Citrus species, were analyzed in this study by an HPLC-UV method; results showed that both flavanones were not entirely solubilised in the distillation water. Similar results were observed after pectin extraction since most of it was preserved in the peels after essential oil extraction.
Soukaina Hilali; Anne-Sylvie Fabiano-Tixier; Karine Ruiz; Abdessamed Hejjaj; Fatima Ait Nouh; Ali Idlimam; Antoine Bily; Laila Mandi; Farid Chemat. Green Extraction of Essential Oils, Polyphenols, and Pectins from Orange Peel Employing Solar Energy: Toward a Zero-Waste Biorefinery. ACS Sustainable Chemistry & Engineering 2019, 7, 11815 -11822.
AMA StyleSoukaina Hilali, Anne-Sylvie Fabiano-Tixier, Karine Ruiz, Abdessamed Hejjaj, Fatima Ait Nouh, Ali Idlimam, Antoine Bily, Laila Mandi, Farid Chemat. Green Extraction of Essential Oils, Polyphenols, and Pectins from Orange Peel Employing Solar Energy: Toward a Zero-Waste Biorefinery. ACS Sustainable Chemistry & Engineering. 2019; 7 (13):11815-11822.
Chicago/Turabian StyleSoukaina Hilali; Anne-Sylvie Fabiano-Tixier; Karine Ruiz; Abdessamed Hejjaj; Fatima Ait Nouh; Ali Idlimam; Antoine Bily; Laila Mandi; Farid Chemat. 2019. "Green Extraction of Essential Oils, Polyphenols, and Pectins from Orange Peel Employing Solar Energy: Toward a Zero-Waste Biorefinery." ACS Sustainable Chemistry & Engineering 7, no. 13: 11815-11822.
Mourad Ouhammou; Lamyae Lahnine; Safa Mghazli; Nadia Hidar; Mohamed Bouchdoug; Abderrahim Jaouad; Laila Mandi; Mostafa Mahrouz. Valorisation of cellulosic waste basic cactus to prepare activated carbon. Journal of the Saudi Society of Agricultural Sciences 2019, 18, 133 -140.
AMA StyleMourad Ouhammou, Lamyae Lahnine, Safa Mghazli, Nadia Hidar, Mohamed Bouchdoug, Abderrahim Jaouad, Laila Mandi, Mostafa Mahrouz. Valorisation of cellulosic waste basic cactus to prepare activated carbon. Journal of the Saudi Society of Agricultural Sciences. 2019; 18 (2):133-140.
Chicago/Turabian StyleMourad Ouhammou; Lamyae Lahnine; Safa Mghazli; Nadia Hidar; Mohamed Bouchdoug; Abderrahim Jaouad; Laila Mandi; Mostafa Mahrouz. 2019. "Valorisation of cellulosic waste basic cactus to prepare activated carbon." Journal of the Saudi Society of Agricultural Sciences 18, no. 2: 133-140.
The present work aims to perform an experimental reuse study of raw and sustainable treated urban wastewaters in the irrigation of alfalfa (Medicagosativa L.) under semi-controlled conditions. The obtained results highlight a significant effect (p<0.05) of water quality on soil monitored parameters. Compared to control soils irrigated with ground water (GW), those irrigated with treated urban wastewaters from the modified activated sludge process (PTW) and raw urban wastewater (RW) showed significant increase in their organic matter (OM) and nutrients content. Indeed, in comparison to GW organic matter (OM) of RW and PTW was 5,37 and 3,84 times higher; Kjeldahl nitrogen (TKN) was 3,50 and 2,81 times higher and total phosphorus (TP) was 4,00 and 3,25 times higher, respectively. The results showed also a significant effect of water quality on yield, macro and microelements concentrations of alfalfa plant. Hence, the highest yield, macro and microelements uptake of the plant were obtained in response to irrigation with PTW and RW compared to control soil GW. Concerning trace metallic elements concentrations, pots irrigated with RW and PTW showed relatively higher concentrations than those of GW pots.
Tawfik El Moussaoui; Laila Mandi; Said Wahbi; Salvatore Masi; Naaila Ouazzani. Soil proprieties and alfalfa (Medicago sativa L.) responses to sustainable treated urban wastewater reuse. Archives of Agronomy and Soil Science 2019, 65, 1900 -1912.
AMA StyleTawfik El Moussaoui, Laila Mandi, Said Wahbi, Salvatore Masi, Naaila Ouazzani. Soil proprieties and alfalfa (Medicago sativa L.) responses to sustainable treated urban wastewater reuse. Archives of Agronomy and Soil Science. 2019; 65 (13):1900-1912.
Chicago/Turabian StyleTawfik El Moussaoui; Laila Mandi; Said Wahbi; Salvatore Masi; Naaila Ouazzani. 2019. "Soil proprieties and alfalfa (Medicago sativa L.) responses to sustainable treated urban wastewater reuse." Archives of Agronomy and Soil Science 65, no. 13: 1900-1912.
Walid Boumalek; Ahmed Kettab; Nabila Bensacia; Maria C. Bruzzoniti; Dorsaf Ben Othman; Laila Mandi; M. Nacer Chabaca; Salim Benziada. Specification of sewage sludge arising from a domestic wastewater treatment plant for agricultural uses. Desalination and Water Treatment 2019, 143, 178 -183.
AMA StyleWalid Boumalek, Ahmed Kettab, Nabila Bensacia, Maria C. Bruzzoniti, Dorsaf Ben Othman, Laila Mandi, M. Nacer Chabaca, Salim Benziada. Specification of sewage sludge arising from a domestic wastewater treatment plant for agricultural uses. Desalination and Water Treatment. 2019; 143 ():178-183.
Chicago/Turabian StyleWalid Boumalek; Ahmed Kettab; Nabila Bensacia; Maria C. Bruzzoniti; Dorsaf Ben Othman; Laila Mandi; M. Nacer Chabaca; Salim Benziada. 2019. "Specification of sewage sludge arising from a domestic wastewater treatment plant for agricultural uses." Desalination and Water Treatment 143, no. : 178-183.
The current study aims to perform a field survey of three abandoned mining sites in the southern centre of Morocco to assess the recent metal pollution in soils and accumulation potential of plant species. Native plants and soils were sampled at several sites in the studied mines and analysed for Cu, Zn, Pb and Cd concentrations. Soils in the investigated sites proved to be deficient in major macronutrients and to contain toxic levels of Cu, Zn, Pb and Cd. Botanical survey of the prospected sites showed the abundance of diverse plant communities (46 species and 19 families), with no obvious toxicity symptoms. Results showed that the concentrations of heavy metals were different in the same plant species and from plant species to another. Eight plants of 46 species namely Hirschfeldia incana (L.) Lagr.-Foss, Citrullus vulgaris (L.) Schradi, Portulaca oleracea L., Stipa capensis Thunb., Lactuca viminea (L.) J.Presl & C.Presl, Forsskaolea tenacissima L., Lycium intricatum Boiss. and Hammada scoparia (Pomel) Iljin were considered as the best-performing specimens due to their high ability to accumulate multiple metals in their shoots and roots without being affected by excessive metal contents. This was confirmed by the transfer factors generally higher than 1. Consequently, these tolerant and native plant species could be used as tools for an effective phytorestoration of metal-contaminated sites.
Laila Midhat; Naaila Ouazzani; Abdessamed Hejjaj; Ahmed Ouhammou; Laila Mandi. Accumulation of heavy metals in metallophytes from three mining sites (Southern Centre Morocco) and evaluation of their phytoremediation potential. Ecotoxicology and Environmental Safety 2018, 169, 150 -160.
AMA StyleLaila Midhat, Naaila Ouazzani, Abdessamed Hejjaj, Ahmed Ouhammou, Laila Mandi. Accumulation of heavy metals in metallophytes from three mining sites (Southern Centre Morocco) and evaluation of their phytoremediation potential. Ecotoxicology and Environmental Safety. 2018; 169 ():150-160.
Chicago/Turabian StyleLaila Midhat; Naaila Ouazzani; Abdessamed Hejjaj; Ahmed Ouhammou; Laila Mandi. 2018. "Accumulation of heavy metals in metallophytes from three mining sites (Southern Centre Morocco) and evaluation of their phytoremediation potential." Ecotoxicology and Environmental Safety 169, no. : 150-160.