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COVID-19 is a terrible virus that has impacted human health and the economy on a global scale. The detection and control of the pandemic have become necessities that require appropriate monitoring strategies. One of these strategies involves measuring and quantifying the virus in water at different stages of the Urban Water Cycle (UWC). This article presents a comprehensive literature review of the analyses and quantifications of SARS-CoV-2 in multiple UWC components from 2020 to June 2021. More than 140 studies worldwide with a focus on industrialized nations were identified, mainly in the USA, Australia, and Asia and the European Union. Wastewater treatment plants were the focus of most of these studies, followed by city sewerage systems and hospital effluents. The fewest studies examined the presence of this virus in bodies of water. Most of the studies were conducted for epidemiological purposes. However, a few focused on viral load and its removal using various treatment strategies or modelling and developing strategies to control the disease. Others compared methodologies for determining if SARS-CoV-2 was present or included risk assessments. This is the first study to emphasize the importance of the various individual components of the UWC and their potential impacts on viral transmission from the source to the public.
Carlos Peña-Guzmán; María Andrea Domínguez-Sánchez; Manuel Rodríguez; Rama Pulicharla; Karen Mora-Cabrera. The Urban Water Cycle as a Planning Tool to Monitor SARS-CoV-2: A Review of the Literature. Sustainability 2021, 13, 9010 .
AMA StyleCarlos Peña-Guzmán, María Andrea Domínguez-Sánchez, Manuel Rodríguez, Rama Pulicharla, Karen Mora-Cabrera. The Urban Water Cycle as a Planning Tool to Monitor SARS-CoV-2: A Review of the Literature. Sustainability. 2021; 13 (16):9010.
Chicago/Turabian StyleCarlos Peña-Guzmán; María Andrea Domínguez-Sánchez; Manuel Rodríguez; Rama Pulicharla; Karen Mora-Cabrera. 2021. "The Urban Water Cycle as a Planning Tool to Monitor SARS-CoV-2: A Review of the Literature." Sustainability 13, no. 16: 9010.
Aflatoxin B1 (AFB1) is one of the most common contaminants of poultry feed and has been linked to adverse effects on animal health and productivity. In this study, the degradation of AFB1 was studied with cell-free extracts (CFE) of Trametes versicolor and Bacillus subtilis using High-Performance Liquid chromatography (HPLC). CFE from B. subtilis and T. versicolor gave 60% and 34% of AFB1 degradation respectively, while heat-inactivated extracts showed no degradation. By-products obtained at the end of AFB1 degradation were analyzed by Liquid Chromatography with tandem mass spectrometry (LC-MS/MS). After 96 h of incubation, by-products with lower m/z values were obtained with CFE from B. subtilis as compared to that from T. versicolor, indicating a higher degradation efficiency of the former. Additionally, the detection of a by-product which could correspond to AFB1-8,9 dihydrodiol - a less toxic derivative of AFB1 - after 72 and 96 h of incubation with CFE from B. subtilis, could indicate the simultaneous detoxification along with degradation of AFB1 by B. subtilis CFE.
Gayatri Suresh; Ignacio Cabezudo; Rama Pulicharla; Agnieszka Cuprys; Tarek Rouissi; Satinder Kaur Brar. Biodegradation of aflatoxin B1 with cell-free extracts of Trametes versicolor and Bacillus subtilis. Research in Veterinary Science 2020, 133, 85 -91.
AMA StyleGayatri Suresh, Ignacio Cabezudo, Rama Pulicharla, Agnieszka Cuprys, Tarek Rouissi, Satinder Kaur Brar. Biodegradation of aflatoxin B1 with cell-free extracts of Trametes versicolor and Bacillus subtilis. Research in Veterinary Science. 2020; 133 ():85-91.
Chicago/Turabian StyleGayatri Suresh; Ignacio Cabezudo; Rama Pulicharla; Agnieszka Cuprys; Tarek Rouissi; Satinder Kaur Brar. 2020. "Biodegradation of aflatoxin B1 with cell-free extracts of Trametes versicolor and Bacillus subtilis." Research in Veterinary Science 133, no. : 85-91.
Non-steroidal anti-inflammatory drugs (NSAIDs) are among the most well-known pharmaceuticals with a broad scope of properties that are widely used in human and veterinary medicine. Because of their extensive utilization, NSAIDs are commonly identified in the environment as trace emerging contaminants. Regardless of vast experience with these drugs, NSAIDs are full of contradictions that trigger major concerns for environmental researchers. A limited understanding on NSAID’s occurrence, distribution and eco-toxicological effects have led to an escalated dilemma in the last decade. Thus, a broad-spectrum study covering all aspects of occurrence, detection and removal is required to meet the fundamental levels of knowledge on the effects of NSAIDs in all exposed environmental aspects. Therefore, this paper focuses on classifying the sources and entry points of residual NSAIDs. Further, detecting and regulating their concentrations in both input streams and receiving environments, along with the removal processes of this specific class of emerging compounds, in the direction of developing a management policy is comprehensively reviewed.
Parnian Izadi; Rana Salem; Sifat Azad Papry; Sara Magdouli; Rama Pulicharla; Satinder Kaur Brar. Non-steroidal anti-inflammatory drugs in the environment: Where were we and how far we have come? Environmental Pollution 2020, 267, 115370 .
AMA StyleParnian Izadi, Rana Salem, Sifat Azad Papry, Sara Magdouli, Rama Pulicharla, Satinder Kaur Brar. Non-steroidal anti-inflammatory drugs in the environment: Where were we and how far we have come? Environmental Pollution. 2020; 267 ():115370.
Chicago/Turabian StyleParnian Izadi; Rana Salem; Sifat Azad Papry; Sara Magdouli; Rama Pulicharla; Satinder Kaur Brar. 2020. "Non-steroidal anti-inflammatory drugs in the environment: Where were we and how far we have come?" Environmental Pollution 267, no. : 115370.
The goal of this work was to investigate the occurrence of contaminants of emerging interest (CEI) in source surface water (SW; river water) and drinking water (DW; tap water) from five drinking water treatment plants (DWTPs) in the Province of Québec, Canada. A total of 28 sampling campaigns were conducted to collect SW and DW samples from each DWTP from June 2016 to July 2017. The seven targeted CEI, including acetaminophen, salicylic acid, caffeine, carbamazepine, ibuprofen, sulfamethoxazole and drospirenone, were analyzed using solid-phase extraction-ultra pressure liquid chromatography-mass spectrometry (SPE-UPLC-MS/MS) for all collected water samples. The selected CEI were detected in all SW and DW samples, with the exception of drospirenone, which occurred in amounts that were below the limit of detection in one DWTP in June and July 2016. In all the SW samples, caffeine was detected and had the highest median concentration range (12.3–91.0 ng/L), followed by acetaminophen (7.9–85.0 ng/L) and salicylic acid (21.6–39.0 ng/L). In the DW samples, salicylic acid was detected and had the highest median concentration range (20.5–50 ng/L), followed by caffeine (5.2–21.8 ng/L), and acetaminophen (5.0–7.7 ng/L). Carbamazepine, ibuprofen, and sulfamethoxazole primarily occurred in amounts between the limit of detection and limit of quantification in SW and occurred below the limit of detection in DW. All the DWTPs exhibited a similar trend in the removal of CEI, which include acetaminophen (≤97.6%), followed by caffeine (71.0–86.5%) and salicylic acid (<50.0%). Varying levels of efficiencies were observed among the removal strategies for CEI under study, which were mainly associated with the contaminant concentration in SW in the case of acetaminophen, and with the treatment processes in the case of caffeine and salicylic acid.
Rama Pulicharla; François Proulx; Sonja Behmel; Jean-B. Sérodes; Manuel J. Rodriguez. Occurrence and seasonality of raw and drinking water contaminants of emerging interest in five water facilities. Science of The Total Environment 2020, 751, 141748 .
AMA StyleRama Pulicharla, François Proulx, Sonja Behmel, Jean-B. Sérodes, Manuel J. Rodriguez. Occurrence and seasonality of raw and drinking water contaminants of emerging interest in five water facilities. Science of The Total Environment. 2020; 751 ():141748.
Chicago/Turabian StyleRama Pulicharla; François Proulx; Sonja Behmel; Jean-B. Sérodes; Manuel J. Rodriguez. 2020. "Occurrence and seasonality of raw and drinking water contaminants of emerging interest in five water facilities." Science of The Total Environment 751, no. : 141748.
Ozonation is becoming a common disinfection method for drinking water treatment. This has prompted the investigation of ozonation disinfection by-products (ODBPs) in drinking water. Ozonation generates a diverse range of carbonyl disinfection by-products, including carboxylic acids, aldehydes, ketones and aldo-ketoacids. Among these ODBPs, carboxylic acid by-products (CABPs) are observed in higher concentrations compared to other carbonyl by-products. However, relatively little research has been conducted on CABPs, including their precursors, formation and occurrence, methods of detection and toxicity. This review outlines the occurrence and variability of CABPs in a number of water sources treated and disinfected with ozonation. It considers the effect of ozonation parameters, including ozone dose, temperature and time of ozonation on the formation of CABPs. The review also discusses the various analytical approaches for CABP quantification, as well as their possible toxicity in drinking water.
Rama Pulicharla; François Proulx; Sonja Behmel; Jean-B. Sérodes; Manuel J. Rodriguez. Trends in Ozonation Disinfection By-Products—Occurrence, Analysis and Toxicity of Carboxylic Acids. Water 2020, 12, 756 .
AMA StyleRama Pulicharla, François Proulx, Sonja Behmel, Jean-B. Sérodes, Manuel J. Rodriguez. Trends in Ozonation Disinfection By-Products—Occurrence, Analysis and Toxicity of Carboxylic Acids. Water. 2020; 12 (3):756.
Chicago/Turabian StyleRama Pulicharla; François Proulx; Sonja Behmel; Jean-B. Sérodes; Manuel J. Rodriguez. 2020. "Trends in Ozonation Disinfection By-Products—Occurrence, Analysis and Toxicity of Carboxylic Acids." Water 12, no. 3: 756.
Mitra Naghdi; Mehrdad Taheran; Rama Pulicharla; Tarek Rouissi; Satinder K. Brar; M. Verma; R.Y. Surampalli. Pine-wood derived nanobiochar for removal of carbamazepine from aqueous media: Adsorption behavior and influential parameters. Arabian Journal of Chemistry 2019, 12, 5292 -5301.
AMA StyleMitra Naghdi, Mehrdad Taheran, Rama Pulicharla, Tarek Rouissi, Satinder K. Brar, M. Verma, R.Y. Surampalli. Pine-wood derived nanobiochar for removal of carbamazepine from aqueous media: Adsorption behavior and influential parameters. Arabian Journal of Chemistry. 2019; 12 (8):5292-5301.
Chicago/Turabian StyleMitra Naghdi; Mehrdad Taheran; Rama Pulicharla; Tarek Rouissi; Satinder K. Brar; M. Verma; R.Y. Surampalli. 2019. "Pine-wood derived nanobiochar for removal of carbamazepine from aqueous media: Adsorption behavior and influential parameters." Arabian Journal of Chemistry 12, no. 8: 5292-5301.
This study evaluates the technoeconomic feasibility of using hybrid advanced oxidation technologies (AOTs) for the removal of chlortetracycline (CTC) in wastewater treatment plant (WWTP). Experimental results on wastewater (WW) and wastewater sludge (WWS) matrices were taken into consideration for the technoeconomic evaluation comprising five different AOT methods. Degradation efficiency of CTC removal varied according to the matrix (WW or WWS) and on the application of individual or hybrid AOPs. A balance between the technical aspect (treatment efficiency parameter) and economic constraints has been equally maintained while evaluating the removal of CTC using AOPs under both the matrix. Among AOTs, namely ultrasonication (UIS), Fenton oxidation (FO), and ferro-sonication (FS) used to treat CTC in WWS, FS was considered as the most feasible technoeconomic solution while ultrasonic assisted laccase (UAL) showed a better technoeconomical option when compared to the sulfate radical based degradation processes (persulfate/Fe2+/Fe0) to remove CTC in WW.
Pratik Kumar; Rama Pulicharla; Satinder Kaur Brar; Azadeh Kermanshahi-Pour; Rao Y. Surampalli. Simple Technoeconomic Approach to Chlortetracycline Removal from Wastewater Treatment Plant. Journal of Hazardous, Toxic, and Radioactive Waste 2019, 23, 04019007 .
AMA StylePratik Kumar, Rama Pulicharla, Satinder Kaur Brar, Azadeh Kermanshahi-Pour, Rao Y. Surampalli. Simple Technoeconomic Approach to Chlortetracycline Removal from Wastewater Treatment Plant. Journal of Hazardous, Toxic, and Radioactive Waste. 2019; 23 (3):04019007.
Chicago/Turabian StylePratik Kumar; Rama Pulicharla; Satinder Kaur Brar; Azadeh Kermanshahi-Pour; Rao Y. Surampalli. 2019. "Simple Technoeconomic Approach to Chlortetracycline Removal from Wastewater Treatment Plant." Journal of Hazardous, Toxic, and Radioactive Waste 23, no. 3: 04019007.
Chlortetracycline (CTC) is widely used as a veterinary antibiotic and is considered as a recalcitrant pollutant. In this study, spiked CTC (2 mg L-1) in wastewater was degraded using laccase from the white rot fungi, Trametes Versicolor combined with ultrasonication (UlS). Over 60% of CTC was removed in 2h by UlS assisted laccase (UAL) treatment where laccase treatment alone took 2 days to degrade 87% of CTC under similar CTC concentration (2 mg L-1), laccase dose (0.5 IU) and pH 6.0 conditions. UAL treatment showed 5.3 folds higher CTC degradation rate compared to laccase alone treatment at pH 6.0. Further, pH optimization of UAL treatment was done and pH 4.5 was found to be optimum wherein 80% of CTC degradation was obtained which is 2.6 folds higher compared to degradation at pH 6.0. The UAL treatment with optimized pH was not only increased CTC degradation efficiency (∼80%) but also reduced the degradation time to 2h. The obtained results highlighted the enhanced degradation rate, efficiency and unaltered stability of laccase during UAL treatment which can be used for oxidizing other tetracycline groups of antibiotics. Moreover, laccase and UAL treatments showed similar degradation products and no estrogenic activity.
Rama Pulicharla; Ratul Kumar Das; Satinder Kaur Brar; Patrick Drogui; Rao Y. Surampalli. Degradation kinetics of chlortetracycline in wastewater using ultrasonication assisted laccase. Chemical Engineering Journal 2018, 347, 828 -835.
AMA StyleRama Pulicharla, Ratul Kumar Das, Satinder Kaur Brar, Patrick Drogui, Rao Y. Surampalli. Degradation kinetics of chlortetracycline in wastewater using ultrasonication assisted laccase. Chemical Engineering Journal. 2018; 347 ():828-835.
Chicago/Turabian StyleRama Pulicharla; Ratul Kumar Das; Satinder Kaur Brar; Patrick Drogui; Rao Y. Surampalli. 2018. "Degradation kinetics of chlortetracycline in wastewater using ultrasonication assisted laccase." Chemical Engineering Journal 347, no. : 828-835.
Fluoroquinolones (FQs), the group of broad spectrum antimicrobials, are frequently detected in different environmental compartments, mostly due to incomplete metabolism in the target organism, inefficient wastewater treatment, and disposal of expired FQs directly into the environment. Another group of the contaminants, widely present in water, air, and soils, are the metal ions (Me). In general, FQs can form stable complexes with metal ions and their co-existence with Me in the environment leads to metal complexation. The most stable complexes are formed between FQs and trivalent ions, whereas FQs and alkali-earth metal ions, i.e. Ca2+ and Mg2+, are the least stable composites. This interaction between FQs and metal ions may alter antibiotic properties. Antibacterial activity of metal complexes is generally comparable with the parent compound; however, some FQs-metal complexes are found to exhibit higher antibacterial activity. Moreover, it was proved that FQs-Me complex can display antifungal potency toward Candida albicans. The mobility of FQs in soil and/or water strongly depends on pH, temperature, and type of metal ions, present in the environment. This review provides a brief description of FQs, their properties, and capacity to form complexes with metal ions. It summarizes influence of FQs-Me complexes on microorganisms and their mobility in different media. Further, the review provides a linkage between the presence of these metal ions in the environment and their effect on the chemistry and biology of fluoroquinolone antibiotics.
Agnieszka Cuprys; Rama Pulicharla; Satinder Kaur Brar; Patrick Drogui; Mausam Verma; Rao Y. Surampalli. Fluoroquinolones metal complexation and its environmental impacts. Coordination Chemistry Reviews 2018, 376, 46 -61.
AMA StyleAgnieszka Cuprys, Rama Pulicharla, Satinder Kaur Brar, Patrick Drogui, Mausam Verma, Rao Y. Surampalli. Fluoroquinolones metal complexation and its environmental impacts. Coordination Chemistry Reviews. 2018; 376 ():46-61.
Chicago/Turabian StyleAgnieszka Cuprys; Rama Pulicharla; Satinder Kaur Brar; Patrick Drogui; Mausam Verma; Rao Y. Surampalli. 2018. "Fluoroquinolones metal complexation and its environmental impacts." Coordination Chemistry Reviews 376, no. : 46-61.
The co-contamination of ciprofloxacin (CIP) with metal ions results in alteration of CIP mobility, antimicrobial activity and distribution/development of the antibiotic-resistance genes. In this study, the stability of five CIP-Me complexes [Me = Al(III), Co(II), Cu(II), Fe(III), Mg] was investigated in the presence of humic substances (HS) at two temperatures 18 ± 2 °C and 4 ± 1 °C for seven days period. The most stable complexes were CIP-Al, CIP-Cu, and CIP-Co with the stability constants (K) at 18 °C 35.5 ± 1.4 11.5 ± 1.5 and 11.7 ± 1.5 respectively. At lower temperature (4 °C), the stability constants decreased: 1-fold for CIP-Al, 14-fold for CIP-Co and 2-fold for CIP-Cu. The presence of humic substances decreased the stability of complexes. The chemical reactions of Fe3+ in water at circumneutral pH resulted in stability alteration. The formation of CIP-Mg complexes at lower temperatures and in the presence of HS was limited. In ultrapure water, CIP-Me complexes exhibit higher toxicity towards Gram-negative Enterobacter aeruginosa (ranged between 0.125 and 0.5 μg/ml). However, the presence of HS reduced the antimicrobial activity of CIP-Me complexes by at least 2-fold. Gram-positive representative, Bacillus subtilis was not affected by the presence of metal ions and/or HS. The toxicity toward B. subtilis for the complexes was equal to toxicity of CIP alone (MIC = 0.25 μg/ml). This suggested the different susceptibility to CIP and its complexes.
Agnieszka Cuprys; Rama Pulicharla; Joanna Lecka; Satinder Kaur Brar; Patrick Drogui; R.Y. Surampalli. Ciprofloxacin-metal complexes –stability and toxicity tests in the presence of humic substances. Chemosphere 2018, 202, 549 -559.
AMA StyleAgnieszka Cuprys, Rama Pulicharla, Joanna Lecka, Satinder Kaur Brar, Patrick Drogui, R.Y. Surampalli. Ciprofloxacin-metal complexes –stability and toxicity tests in the presence of humic substances. Chemosphere. 2018; 202 ():549-559.
Chicago/Turabian StyleAgnieszka Cuprys; Rama Pulicharla; Joanna Lecka; Satinder Kaur Brar; Patrick Drogui; R.Y. Surampalli. 2018. "Ciprofloxacin-metal complexes –stability and toxicity tests in the presence of humic substances." Chemosphere 202, no. : 549-559.
In the current study, sequential nitrification and anoxic experiments in synthetic municipal wastewater were exposed to 0.5 to 100 mg/L of chlortetracycline for 24 h to evaluate acute impact on the nitrification, and denitrification processes of biological treatment. Both processes were significantly (p 50 mg/L of chlortetracycline, and the results revealed that nitrification was adversely affected by chlortetracycline compared with the anoxic process. In nitrification, chemical oxygen removal (COD) and ammonia oxidation kinetics were 50% inhibited at 10 mg chlortetracycline/L, and nitrite oxidation kinetics at 0.5 mg chlortetracycline/L. Likewise, in the anoxic process, 14 and 10 mg/L of chlortetracycline inhibited 50% of COD removal and nitrate reduction kinetics, respectively. In nitrification and denitrification, 90% of chlortetracycline was removed by adsorbing onto sludge suspended solids. In addition, a higher chlortetracycline concentration in anoxic effluent, compared with aerobic effluents, indicated a dissimilarity in the composition of sludge solids, pH, and biomass production for both processes.
Rama Pulicharla; Mehdi Zolfaghari; Satinder Kaur Brar; Patrick Drogui; Serge Auger; Mausam Verma; Rao Y. Surampalli. Acute Impact of Chlortetracycline on Nitrifying and Denitrifying Processes. Water Environment Research 2018, 90, 604 -614.
AMA StyleRama Pulicharla, Mehdi Zolfaghari, Satinder Kaur Brar, Patrick Drogui, Serge Auger, Mausam Verma, Rao Y. Surampalli. Acute Impact of Chlortetracycline on Nitrifying and Denitrifying Processes. Water Environment Research. 2018; 90 (7):604-614.
Chicago/Turabian StyleRama Pulicharla; Mehdi Zolfaghari; Satinder Kaur Brar; Patrick Drogui; Serge Auger; Mausam Verma; Rao Y. Surampalli. 2018. "Acute Impact of Chlortetracycline on Nitrifying and Denitrifying Processes." Water Environment Research 90, no. 7: 604-614.
This study investigates the removal of chlortetracycline (CTC) antibiotic using sulfate radical-based oxidation process. Sodium persulfate (PS) was used as a source to generate sulfate radicals by homogeneous (Fe2+) and heterogeneous (zero valent iron, ZVI) iron as a catalyst. Increased EDTA concentration was used to break the CTC-Fe metal complexes during CTC estimation. The influence of various parameters, such as PS concentration, iron (Fe2+ and ZVI) concentration, PS/iron molar ratio, and pH were studied and optimum conditions were reported. CTC removal was increased with increasing concentration of PS and iron at an equal molar ratio of PS/Fe2+ and PS/ZVI processes. PS/Fe2+ and PS/ZVI oxidation processes at 1:2 (500 μM PS and 1000 μM) molar ratio showed 76% and 94% of 1 μM CTC removal in 2 h. Further increased molar ratio 1:2 onwards, PS/Fe2+ process showed a slight increase in CTC degradation whereas in PS/ZVI process showed similar degradation to 1:2 (PS/Fe) ratio at constant PS 500 μM concentration. Slower activation of persulfate which indirectly indicates the slower generation of sulfate radicals in PS/ZVI process showed higher degradation efficiency of CTC. The detected transformation products and their estrogenicity results stated that sulfate radicals seem to be efficient in forming stable and non-toxic end products.
Rama Pulicharla; Roggy Drouinaud; Satinder Kaur Brar; Patrick Drogui; Francois Proulx; Mausam Verma; Rao Y. Surampalli. Activation of persulfate by homogeneous and heterogeneous iron catalyst to degrade chlortetracycline in aqueous solution. Chemosphere 2018, 207, 543 -551.
AMA StyleRama Pulicharla, Roggy Drouinaud, Satinder Kaur Brar, Patrick Drogui, Francois Proulx, Mausam Verma, Rao Y. Surampalli. Activation of persulfate by homogeneous and heterogeneous iron catalyst to degrade chlortetracycline in aqueous solution. Chemosphere. 2018; 207 ():543-551.
Chicago/Turabian StyleRama Pulicharla; Roggy Drouinaud; Satinder Kaur Brar; Patrick Drogui; Francois Proulx; Mausam Verma; Rao Y. Surampalli. 2018. "Activation of persulfate by homogeneous and heterogeneous iron catalyst to degrade chlortetracycline in aqueous solution." Chemosphere 207, no. : 543-551.
Titanium dioxide particles (TiO2) are widely used to produce whitens (titanium white) and different class of nanomaterials (semiconductors, photo catalysts and nanotubes). Nanomaterials are excellent adsorbents and catalysts with a wide range of applications. However, these are reported to induce biological and genetic alterations among several invertebrate groups. Invasive species such as zebra mussels can be used as model organisms to study the behavior of particles and nanoparticles (NPs) due to their wide distribution; mussels have been extensively used for monitoring water pollution. In the present study, TiO2 particles were dispersed and added to a Chlorella culture to emulate a natural scenario. To study the reaction of zebra mussels to different TiO2 concentrations, they were fed with 0.35, 0.7 and 3.5 mgTiO2/L of the suspension for 3days and the titanium was measured in the water column, mussels and sediments with ICP-AES. Zebra mussels obtained from the Port of Quebec had up 61.62mgTi/kg wet tissue at the time of capture. After 10days of depuration, they had from 0.23 to 16.28mgTi/kg wet tissue. Mussels accumulated TiO2 after 36h of exposition as a function of TiO2 concentration, but mussels did not present significant mortality due to TiO2 toxicity until concentrations higher than 0.7ppm. A second set of experiments was run to understand the TiO2 pathway attached to microalgae vs free TiO2. Results indicated that mussels accumulated slightly more Ti when it was mixed with microalgae. However, the statistical difference was non- significant. A 100 times higher accumulation of Ti in sediments was identified when mussels are present. Thus, it was concluded that the sedimentation of TiO2 is enhanced by the zebra mussels' filtration activity.
Araceli D. Larios; Rama Pulicharla; Satinder Kaur Brar; Maximiliano Cledón. Filter feeders increase sedimentation of titanium dioxide: The case of zebra mussels. Science of The Total Environment 2018, 618, 746 -752.
AMA StyleAraceli D. Larios, Rama Pulicharla, Satinder Kaur Brar, Maximiliano Cledón. Filter feeders increase sedimentation of titanium dioxide: The case of zebra mussels. Science of The Total Environment. 2018; 618 ():746-752.
Chicago/Turabian StyleAraceli D. Larios; Rama Pulicharla; Satinder Kaur Brar; Maximiliano Cledón. 2018. "Filter feeders increase sedimentation of titanium dioxide: The case of zebra mussels." Science of The Total Environment 618, no. : 746-752.
The green synthesis (GS) of different metallic nanoparticles (MNPs) has re-evaluated plants, animals and microorganisms for their natural potential to reduce metallic ions into neutral atoms at no expense of toxic and hazardous chemicals. Contrary to chemically synthesized MNPs, GS offers advantages of enhanced biocompatibility and thus has better scope for biomedical applications. Plant, animals and microorganisms belonging to lower and higher taxonomic groups have been experimented for GS of MNPs, such as gold (Au), silver (Ag), copper oxide (CuO), zinc oxide (ZnO), iron (Fe2O3), palladium (Pd), platinum (Pt), nickel oxide (NiO) and magnesium oxide (MgO). Among the different plant groups used for GS, angiosperms and algae have been explored the most with great success. GS with animal-derived biomaterials, such as chitin, silk (sericin, fibroin and spider silk) or cell extract of invertebrates have also been reported. Gram positive and gram negative bacteria, different fungal species and virus particles have also shown their abilities in the reduction of metal ions. However, not a thumb rule, most of the reducing agents sourced from living world also act as capping agents and render MNPs less toxic or more biocompatible. The most unexplored area so far in GS is the mechanism studies for different natural reducing agents expect for few of them, such as tea and neem plants. This review encompasses the recent advances in the GS of MNPs using plants, animals and microorganisms and analyzes the key points and further discusses the pros and cons of GS in respect of chemical synthesis.
Ratul Kumar Das; Vinayak Laxman Pachapur; Linson Lonappan; Mitra Naghdi; Rama Pulicharla; Sampa Maiti; Maximiliano Cledon; Larios Martinez Araceli Dalila; Saurabh Sarma; Satinder Kaur Brar. Biological synthesis of metallic nanoparticles: plants, animals and microbial aspects. Nanotechnology for Environmental Engineering 2017, 2, 18 .
AMA StyleRatul Kumar Das, Vinayak Laxman Pachapur, Linson Lonappan, Mitra Naghdi, Rama Pulicharla, Sampa Maiti, Maximiliano Cledon, Larios Martinez Araceli Dalila, Saurabh Sarma, Satinder Kaur Brar. Biological synthesis of metallic nanoparticles: plants, animals and microbial aspects. Nanotechnology for Environmental Engineering. 2017; 2 (1):18.
Chicago/Turabian StyleRatul Kumar Das; Vinayak Laxman Pachapur; Linson Lonappan; Mitra Naghdi; Rama Pulicharla; Sampa Maiti; Maximiliano Cledon; Larios Martinez Araceli Dalila; Saurabh Sarma; Satinder Kaur Brar. 2017. "Biological synthesis of metallic nanoparticles: plants, animals and microbial aspects." Nanotechnology for Environmental Engineering 2, no. 1: 18.
Nano-crystalline cellulose (NCC) is a nano-scale biomaterial derived from highly abundant natural polymer cellulose. It is industrially produced by concentrated acid hydrolysis of cellulosic materials. However, presences of as high as 5–10% of sugar monomers in spent sulphuric acid during the manufacturing process, makes it unsuitable for such recycling or reuse of sulphuric acid. Currently, the industry has been using membrane and ion exchange technology to remove such sugars, however, such technologies cannot achieve the target of 80–90% removal. In the current investigation, thermal treatment and acid mediated thermal treatment have been evaluated for sugar removal from the spent sulphuric acid. Almost complete removal of sugar has been achieved by this approach. Maximum sugar removal efficiency (99.9%) observed during this study was at 120 ± 1 °C for 60 min using 0.8 ratio (sample: acid) or at 100 ± 1 °C for 40 min using 1.5 ratio.
Sampa Maiti; Saurabh Sarma; Satinder Kaur Brar; Rama Pulicharla; Richard Berry. Acid mediated chemical treatment to remove sugar from waste acid stream from nano-crystalline cellulose manufacturing process. Carbohydrate Polymers 2017, 169, 458 -466.
AMA StyleSampa Maiti, Saurabh Sarma, Satinder Kaur Brar, Rama Pulicharla, Richard Berry. Acid mediated chemical treatment to remove sugar from waste acid stream from nano-crystalline cellulose manufacturing process. Carbohydrate Polymers. 2017; 169 ():458-466.
Chicago/Turabian StyleSampa Maiti; Saurabh Sarma; Satinder Kaur Brar; Rama Pulicharla; Richard Berry. 2017. "Acid mediated chemical treatment to remove sugar from waste acid stream from nano-crystalline cellulose manufacturing process." Carbohydrate Polymers 169, no. : 458-466.
Concern over tetracyclines (TCs) complexation with metals in the environment is growing as a new class of emerging contaminants. TCs exist as a different net charged species depending on their dissociation constants, pH and the surrounding environment. One of the key concerns about TCs is its strong tendency to interact with various metal ions and form metal complexes. Moreover, co-existence of TCs and metals in the environment and their interactions has shown increased antibiotic resistance. Despite extensive research on TCs complexation, investigations on their antibiotic efficiency and pharmacological profile in bacteria have been limited. In addition, the current knowledge on TCs metal complexation, their fate and risk assessment in the environment are inadequate to obtain a clear understanding of their consequences on living systems. This indicates that vital and comprehensive studies on TCs-metal complexation, especially towards growing antibiotic resistance trends are required. This review summarizes the role of TCs metal complexation on the development of antibiotic resistance. Furthermore, impact of metal complexation on degradation, toxicity and the fate of TCs in the environment are discussed and future recommendations have been made.
Rama Pulicharla; Krishnamoorthy Hegde; Satinder Kaur Brar; Rao Y. Surampalli. Tetracyclines metal complexation: Significance and fate of mutual existence in the environment. Environmental Pollution 2017, 221, 1 -14.
AMA StyleRama Pulicharla, Krishnamoorthy Hegde, Satinder Kaur Brar, Rao Y. Surampalli. Tetracyclines metal complexation: Significance and fate of mutual existence in the environment. Environmental Pollution. 2017; 221 ():1-14.
Chicago/Turabian StyleRama Pulicharla; Krishnamoorthy Hegde; Satinder Kaur Brar; Rao Y. Surampalli. 2017. "Tetracyclines metal complexation: Significance and fate of mutual existence in the environment." Environmental Pollution 221, no. : 1-14.
Residual emerging contaminants in wastewater sludge remain an obstacle for its wide and safe applications such as landfilling and bio-fertilizer. In this study, the feasibility of individual ultrasonication (UlS) and Fenton oxidation (FO) and combined, Ferro-sonication processes (FO) on the degradation of chlortetracycline (CTC) in wastewater sludge was investigated. UlS parameters such as amplitude and sonication time were optimized by response surface methodology (RSM) for further optimization of FS process. Generation of highly reactive hydroxyl radicals in FO and FS processes were compared to evaluate the degradation efficiency of CTC. Increasing in the ratio of hydrogen peroxide and iron concentration showed increased CTC degradation in FO process; whereas in FS, an increase in iron concentration did not show any significant effect (p>0.05) on CTC degradation in sludge. The estimated iron concentration in sludge (115mg/kg) was enough to degrade CTC without the addition of external iron. The only adjustment of sludge pH to 3 was enough to generate in-situ hydroxyl radicals by utilizing iron which is already present in the sludge. This observation was further supported by hydroxyl radical estimation with adjustment of water pH to 3 and with and without the addition of iron. The optimum operating UlS conditions were found to be 60% amplitude for 106min by using RSM. Compared to standalone UlS and FO at 1:1 ratio, FS showed 15% and 8% increased CTC degradation respectively. In addition, UlS of sludge increased estrogenic activity 1.5 times higher compared to FO. FS treated samples did not show any estrogenic activity.
Rama Pulicharla; Satinder Kaur Brar; Tarek Rouissi; Serge Auger; Patrick Drogui; Mausam Verma; Rao Y. Surampalli. Degradation of chlortetracycline in wastewater sludge by ultrasonication, Fenton oxidation, and ferro-sonication. Ultrasonics Sonochemistry 2017, 34, 332 -342.
AMA StyleRama Pulicharla, Satinder Kaur Brar, Tarek Rouissi, Serge Auger, Patrick Drogui, Mausam Verma, Rao Y. Surampalli. Degradation of chlortetracycline in wastewater sludge by ultrasonication, Fenton oxidation, and ferro-sonication. Ultrasonics Sonochemistry. 2017; 34 ():332-342.
Chicago/Turabian StyleRama Pulicharla; Satinder Kaur Brar; Tarek Rouissi; Serge Auger; Patrick Drogui; Mausam Verma; Rao Y. Surampalli. 2017. "Degradation of chlortetracycline in wastewater sludge by ultrasonication, Fenton oxidation, and ferro-sonication." Ultrasonics Sonochemistry 34, no. : 332-342.
Polyphenols (negative groups) of strawberry extract interacts with positively protonated amino groups of chitosan which helps in maximum encapsulation. This approach can improve the bioavailability and sustained release of phytochemicals having lower bioavailability. The optimum mass ratio of chitosan-tripolyphosphate and polyphenols (PPs) loading was investigated to be 3:1 and 0.5 mg/ml of strawberry extract, respectively. Prepared nanoformulation were characterized by UV-visible spectroscopy, Fourier transform infrared spectroscopy and scanning electron microscopy. The formed particles size ranged between 300 and 600 nm and polydispersity index (PDI) of ≈ 0.5. The optimized formulation showed encapsulation efficiency of 58.09% at 36.47% of polyphenols loading. Initial burst and continuous release of PPs was observed at pH 7.4 of in vitro release studies. PPs release profile at this pH was found to be non-Fickian analomous diffusion and the release was followed first order kinetics. And at pH 1.4, diffusion-controlled Fickian release of PPs was observed.
Rama Pulicharla; Caroline Marques; Ratul Kumar Das; Tarek Rouissi; Satinder Kaur Brar. Encapsulation and release studies of strawberry polyphenols in biodegradable chitosan nanoformulation. International Journal of Biological Macromolecules 2016, 88, 171 -178.
AMA StyleRama Pulicharla, Caroline Marques, Ratul Kumar Das, Tarek Rouissi, Satinder Kaur Brar. Encapsulation and release studies of strawberry polyphenols in biodegradable chitosan nanoformulation. International Journal of Biological Macromolecules. 2016; 88 ():171-178.
Chicago/Turabian StyleRama Pulicharla; Caroline Marques; Ratul Kumar Das; Tarek Rouissi; Satinder Kaur Brar. 2016. "Encapsulation and release studies of strawberry polyphenols in biodegradable chitosan nanoformulation." International Journal of Biological Macromolecules 88, no. : 171-178.
Diclofenac (DCF), a prevalent non-steroidal anti-inflammatory drug (NSAID) is often detected in wastewater and surface water. Analysis of the pharmaceuticals in complex matrices is often laden with challenges. In this study a reliable, rapid and sensitive method based on laser diode thermal desorption/atmospheric pressure chemical ionization (LDTD/APCI) coupled with tandem mass spectrometry (MS/MS) has been developed for the quantification of DCF in wastewater and wastewater sludge. An established conventional LC-ESI-MS/MS (Liquid chromatography-electrospray ionization- tandem mass spectrometry) method was compared with LDTD-APCI-MS/MS approach. The newly developed LDTD-APCI-MS/MS method reduced the analysis time to 12 seconds in lieu of 12 minutes for LC-ESI-MS/MS method. The method detection limits for LDTD-APCI-MS/MS method were found to be 270 ng L−1 (LOD) and 1000 ng L−1 (LOQ). Furthermore, two extraction procedures, ultrasonic assisted extraction (USE) and accelerated solvent extraction (ASE) for the extraction of DCF from wastewater sludge were compared and ASE with 95.6 ±7% recovery was effective over USE with 86 ± 4% recovery. The fate and partitioning of DCF in wastewater (WW) and wastewater sludge (WWS) in wastewater treatment plant was also monitored at various stages of treatment in Quebec Urban community wastewater treatment plant. DCF exhibited affinity towards WW than WWS with a presence about 60% of DCF in WW in contrary with theoretical prediction (Log Kow = 4.51).
Linson Lonappan; Rama Pulicharla; Tarek Rouissi; Satinder K. Brar; Mausam Verma; Rao Y. Surampalli; José R. Valero. Diclofenac in municipal wastewater treatment plant: quantification using laser diode thermal desorption—atmospheric pressure chemical ionization—tandem mass spectrometry approach in comparison with an established liquid chromatography-electrospray ionization–tandem mass spectrometry method. Journal of Chromatography A 2016, 1433, 106 -113.
AMA StyleLinson Lonappan, Rama Pulicharla, Tarek Rouissi, Satinder K. Brar, Mausam Verma, Rao Y. Surampalli, José R. Valero. Diclofenac in municipal wastewater treatment plant: quantification using laser diode thermal desorption—atmospheric pressure chemical ionization—tandem mass spectrometry approach in comparison with an established liquid chromatography-electrospray ionization–tandem mass spectrometry method. Journal of Chromatography A. 2016; 1433 ():106-113.
Chicago/Turabian StyleLinson Lonappan; Rama Pulicharla; Tarek Rouissi; Satinder K. Brar; Mausam Verma; Rao Y. Surampalli; José R. Valero. 2016. "Diclofenac in municipal wastewater treatment plant: quantification using laser diode thermal desorption—atmospheric pressure chemical ionization—tandem mass spectrometry approach in comparison with an established liquid chromatography-electrospray ionization–tandem mass spectrometry method." Journal of Chromatography A 1433, no. : 106-113.
Nidhi Chadha; Sangeeta Lal; Anil K. Mishra; Rama Pulicharla; Maximiliano Cledon; Satinder Kaur Brar; R. Y. Surampalli. Different Analytical Approaches for the Determination of Presence of Engineered Nanomaterials in Natural Environments. Journal of Hazardous, Toxic, and Radioactive Waste 2016, 20, 1 .
AMA StyleNidhi Chadha, Sangeeta Lal, Anil K. Mishra, Rama Pulicharla, Maximiliano Cledon, Satinder Kaur Brar, R. Y. Surampalli. Different Analytical Approaches for the Determination of Presence of Engineered Nanomaterials in Natural Environments. Journal of Hazardous, Toxic, and Radioactive Waste. 2016; 20 (1):1.
Chicago/Turabian StyleNidhi Chadha; Sangeeta Lal; Anil K. Mishra; Rama Pulicharla; Maximiliano Cledon; Satinder Kaur Brar; R. Y. Surampalli. 2016. "Different Analytical Approaches for the Determination of Presence of Engineered Nanomaterials in Natural Environments." Journal of Hazardous, Toxic, and Radioactive Waste 20, no. 1: 1.