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Dr. Md. Hasibur Rahaman
Jashore University of Science and Technology

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Research Keywords & Expertise

0 Microbial Ecology
0 Ecological Engineering
0 Constructed wetland
0 Nutrient removal and recovery
0 Wastewater treament

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Constructed wetland
Nutrient removal and recovery

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Journal article
Published: 29 April 2021 in Water
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The assessment of the impacts of climate change on hydrology is important for better water resources management. However, few studies have been conducted in semi-arid Africa, even less in Madagascar. Here we report, climate-induced future hydrological prediction in Mangoky river, Madagascar using an artificial neural network (ANN) and the soil and water assessment tool (SWAT). The current study downscaled two global climate models on the mid-term, noted the 2040s (2041–2050) and long-term, noted 2090s (2091–2099) under two shared socioeconomic pathways (SSP) scenarios, SSP 3–7.0 and SSP 5–8.5. Statistical indices of both ANN and SWAT showed good performance (R2 > 0.65) of the models. Our results revealed a rise in maximum temperature (4.26–4.69 °C) and minimum temperature (2.74–3.01 °C) in the 2040s and 2090s. Under SSP 3–7.0 and SSP 5–8.5, a decline in the annual precipitation is projected in the 2040s and increased the 2090s. This study found that future precipitation and temperature could significantly decrease annual runoff by 60.59% and 73.77% in the 2040s; and 25.18% and 23.45% in the 2090s under SSP 3–7.0 and SSP 5–8.5, respectively. Our findings could be useful for the adaptation to climate change, managing water resources, and water engineering.

ACS Style

Mirindra Rabezanahary Tanteliniaina; Hasibur Rahaman; Jun Zhai. Assessment of the Future Impact of Climate Change on the Hydrology of the Mangoky River, Madagascar Using ANN and SWAT. Water 2021, 13, 1239 .

AMA Style

Mirindra Rabezanahary Tanteliniaina, Hasibur Rahaman, Jun Zhai. Assessment of the Future Impact of Climate Change on the Hydrology of the Mangoky River, Madagascar Using ANN and SWAT. Water. 2021; 13 (9):1239.

Chicago/Turabian Style

Mirindra Rabezanahary Tanteliniaina; Hasibur Rahaman; Jun Zhai. 2021. "Assessment of the Future Impact of Climate Change on the Hydrology of the Mangoky River, Madagascar Using ANN and SWAT." Water 13, no. 9: 1239.

Journal article
Published: 06 April 2021 in Environmental Research
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Organotrophic anammox is a promising process for treating both nitrogen and organic containing wastewater than that of the traditional autotrophic anammox for sole nitrogen removal. However pathways of nitrogen removal particularly at metagenomic level in both processes are still unknown. Here we report, metabolic pathways of nitrogen removal in two lab-scale sequencing batch reactors (SBR), one autotrophic and another organotrophic (TOC/TN = 0.1) anammox bacteria incubated over 220 days. Both reactors showed satisfactory nitrogen removal with 840.31 mg N/L.d and 786.81 mg N/L.d for autotrophic and organotrophic anammox reactors respectively. Four anammox species namely Candidatus B. fulgida, B. sinica, J. caeni and Candidatus K. stuttgartiensis were identified in both reactors. The Candidatus K. stuttgartiensis (4%) was dominant in autotrophic reactor whereas Candidatus J. caeni (10%) in the organotrophic reactor. The supply of organic promoted the growth of anammox bacteria more than three times higher than that of the autotrophic anammox reactor. The functional genes related to the DNRA pathway was obtained in all anammox species except for Candidatus K. stuttgartiensis. The co-existence of other DNRA (Armatimonadetes and Thauera) and partial denitrifying bacteria (Chloroflexi) was also found in both reactors. Moreover, functional genes related to acetate metabolism by acetyl-CoA way were obtained in all anammox bacteria except Candidatus B. fulgida which showed alternative ackA/Pac-t pathways in organic anammox reactor. Overall current results suggest that the anammox, DNRA and partial denitrification were the key nitrogen transformation pathways, particularly in organotrophic anammox reactor. Our findings will improve understanding of the practical application of organotrophic anammox for wider wastewater treatment.

ACS Style

Xuejiao Yin; Hasibur Rahaman; Wenbo Liu; Jacek Mąkinia; Jun Zhai. Comparison of nitrogen and VFA removal pathways in autotrophic and organotrophic anammox reactors. Environmental Research 2021, 197, 111065 .

AMA Style

Xuejiao Yin, Hasibur Rahaman, Wenbo Liu, Jacek Mąkinia, Jun Zhai. Comparison of nitrogen and VFA removal pathways in autotrophic and organotrophic anammox reactors. Environmental Research. 2021; 197 ():111065.

Chicago/Turabian Style

Xuejiao Yin; Hasibur Rahaman; Wenbo Liu; Jacek Mąkinia; Jun Zhai. 2021. "Comparison of nitrogen and VFA removal pathways in autotrophic and organotrophic anammox reactors." Environmental Research 197, no. : 111065.

Journal article
Published: 23 February 2021 in Science of The Total Environment
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The coupling transformation of carbon, nitrogen and sulfur compounds has been studied in lab-scale and pilot-scale constructed wetlands (CWs), but few studies investigated full-scale CW. In this study, we used batch experiments to investigate the potentials of carbon, nitrogen and sulfur transformation in a long-term operated, full-scale horizontal subsurface flow wetland. The sediments collected from the HSFW were incubated for 48 h in the laboratory with supplying various dosages of carbon, nitrogen and sulfur compounds. The results showed that heterotrophic denitrification was the main pathway. At the same time, the sulfide (S2−)-based autotrophic denitrification was also present. Increasing TOC concentration or NO3− concentration could promote heterotrophic denitrification but did not inhibit the sulfide-based autotrophic denitrification. In our experiment, the highest NO3− removal via autotrophic denitrification was 25.23% while that via heterotrophic denitrification was 73.66%, leading to the total NO3− removal of 98.89%. The results also demonstrated that NO3− rather than NO2− was the preferable electron acceptor for both heterotrophic and sulfide-based autotrophic denitrification in the CW. Increasing S2− concentrations promote NO3− removal from 12.99% to 25.23% without organic carbon, but varying NO3− or NO2− has no effects. These results indicated that concentrations of S2−, instead of NO3− or NO2−, was the limiting factor for sulfide-based autotrophic denitrification in the studied CW. The microbial community analysis and correlation analysis between the transformation of carbon, nitrogen and sulfur compounds and relative abundance of bacteria further confirmed that in the CW, the key pathways coupling transformation were heterotrophic denitrification and sulfide-based autotrophic denitrification. Overall, the current study will enhance understanding of carbon, nitrogen, and sulfur transformation in CW and support better design and treatment efficiency.

ACS Style

Wenbo Liu; Hasibur Rahaman; Jacek Mąkinia; Jun Zhai. Coupling transformation of carbon, nitrogen and sulfur in a long-term operated full-scale constructed wetland. Science of The Total Environment 2021, 777, 146016 .

AMA Style

Wenbo Liu, Hasibur Rahaman, Jacek Mąkinia, Jun Zhai. Coupling transformation of carbon, nitrogen and sulfur in a long-term operated full-scale constructed wetland. Science of The Total Environment. 2021; 777 ():146016.

Chicago/Turabian Style

Wenbo Liu; Hasibur Rahaman; Jacek Mąkinia; Jun Zhai. 2021. "Coupling transformation of carbon, nitrogen and sulfur in a long-term operated full-scale constructed wetland." Science of The Total Environment 777, no. : 146016.

Journal article
Published: 31 August 2019 in Ecological Engineering
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Organotrophic anaerobic ammonium oxidation (anammox) bacteria can utilize small volatile fatty acids with nitrate as electron acceptors with less energy consumption and no biomass production. To achieve a faster and stable start-up of organotrophic anammox process, in this study, the growth of organotrophic anammox bacteria seeded from hybrid constructed wetland (CW) sediment under different TOC/TN ratios and different chloramphenicol concentrations were investigated. The incubation study was conducted at the TOC/TN ratio = 0.0375–0.1 or 0.1–0.2 for the period of over five months by using serum bottles. The anammox bacteria revealed a higher activity when the TOC/TN ratio was 0.1, with the removal efficiency of NH4+-N (60–80%) and NO2−-N (~100%). The relative abundances of anammox in the incubated CW sediment were about 30% higher in comparison with the municipal waste water treatment plant sludge, suggesting the CW sediment could be a viable source for the enrichment of organotrophic anammox bacteria. On the contrary, the continuous addition of 50 mg/L chloramphenicol completely inhibited the anammox activity in our study. Following the results of the batch tests, Candidatus Brocadia caroliniensis was successfully enriched with the CW sediment in an auto-controlled SBR for the period of 40 days.

ACS Style

Xuejiao Yin; Jun Zhai; Wei Hu; Yue Li; Hasibur Rahaman; Jacek Mąkinia. A fast start-up of the organotrophic anammox process inoculated with constructed wetland sediment. Ecological Engineering 2019, 138, 454 -460.

AMA Style

Xuejiao Yin, Jun Zhai, Wei Hu, Yue Li, Hasibur Rahaman, Jacek Mąkinia. A fast start-up of the organotrophic anammox process inoculated with constructed wetland sediment. Ecological Engineering. 2019; 138 ():454-460.

Chicago/Turabian Style

Xuejiao Yin; Jun Zhai; Wei Hu; Yue Li; Hasibur Rahaman; Jacek Mąkinia. 2019. "A fast start-up of the organotrophic anammox process inoculated with constructed wetland sediment." Ecological Engineering 138, no. : 454-460.

Journal article
Published: 01 November 2018 in Science of The Total Environment
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Carbamazepine (CBZ), a widely used antiepileptic drug, is refractory to biological wastewater treatment. Rapid removal of CBZ is possible using synthetic manganese oxide (δ-MnO2) but the removal mechanisms require further investigation. In this study, CBZ degradation by δ-MnO2 was carried out at different pH to further explore the degradation mechanisms. Results show that CBZ degradation by δ-MnO2 was highly pH dependent, and rapid degradation occurred when pH <2.8. Based on the density functional theory calculations, increasing [H+] not only increased the reactivity of δ-MnO2, but also enhanced the secondary reactions of the intermediates. During the degradation process, protonation of CBZ degradation intermediates, instead of CBZ, played an important role. The overall kinetics of CBZ degradation was then described by the retarded first-order model. The initial rate (rinit) in the model between pH 2.0 and 6.2 was determined to be rinit = (2.41 ± 0.51) × 10−3[CBZ]1.21[MnO2]1.07[H+]1.41. This is the first report revealing that protonation of intermediates from CBZ degradation can improve the CBZ oxidation by δ-MnO2. The pathways of CBZ degradation by δ-MnO2 were also proposed. The results of this study provide a new insight into the processing mechanism.

ACS Style

Jun Zhai; Quanfeng Wang; Qing Li; Bo Shang; Hasibur Rahaman; Jialiang Liang; Jiucui Ji; Wenbo Liu. Degradation mechanisms of carbamazepine by δ-MnO2: Role of protonation of degradation intermediates. Science of The Total Environment 2018, 640-641, 981 -988.

AMA Style

Jun Zhai, Quanfeng Wang, Qing Li, Bo Shang, Hasibur Rahaman, Jialiang Liang, Jiucui Ji, Wenbo Liu. Degradation mechanisms of carbamazepine by δ-MnO2: Role of protonation of degradation intermediates. Science of The Total Environment. 2018; 640-641 ():981-988.

Chicago/Turabian Style

Jun Zhai; Quanfeng Wang; Qing Li; Bo Shang; Hasibur Rahaman; Jialiang Liang; Jiucui Ji; Wenbo Liu. 2018. "Degradation mechanisms of carbamazepine by δ-MnO2: Role of protonation of degradation intermediates." Science of The Total Environment 640-641, no. : 981-988.

Original paper
Published: 09 December 2017 in International Journal of Environmental Science and Technology
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Produced water (PW) from natural gas field, characterized with high organic contents, has brought high environmental concerns world widely. Fenton and enhanced Fenton technologies were considered as the potential methods to degrade the organic contaminates in the PW, but with very limited data or reference. Here, we examined the optimum conditions of Fenton on organics and colour removal from natural gas PW after coagulation pre-treatment. Simultaneously, the optimal Fenton process integrated with ultraviolet (UV) and ultrasonic (US) irradiation were applied to enhance pollutants removal efficiencies. The optimal Fenton conditions were found at 60 min with molar ratios of 6:1 and 25:1 for H2O2/COD and H2O2/Fe2+, respectively and the initial pH of 3. Among these the three treatment processes, chemical oxygen demand (COD), total organic carbon, 5-day biological oxygen demand (BOD5), and colour removal efficiencies were highest during UV–Fenton (82, 73, 68, and 95%,) followed by US–Fenton (79, 70, 66, and 95%) and Fenton treatment (70, 58, 51, and 92%), respectively. High biodegradability (BOD5/COD) was also observed after UV–Fenton process (0.76) than the others (both 0.73). The current study showed a satisfactory carbon and colour removal efficiencies from PW using different Fenton processes; however, there still is a need for final polishing such as biological treatment or low cost constructed wetland before discharge. This study can be a good reference for engineering application PW treatment.

ACS Style

J. Zhai; H. Ma; J. Liao; M. H. Rahaman; Zhongping Yang; Z. Chen. Comparison of Fenton, ultraviolet–Fenton and ultrasonic–Fenton processes on organics and colour removal from pre-treated natural gas produced water. International Journal of Environmental Science and Technology 2017, 15, 2411 -2422.

AMA Style

J. Zhai, H. Ma, J. Liao, M. H. Rahaman, Zhongping Yang, Z. Chen. Comparison of Fenton, ultraviolet–Fenton and ultrasonic–Fenton processes on organics and colour removal from pre-treated natural gas produced water. International Journal of Environmental Science and Technology. 2017; 15 (11):2411-2422.

Chicago/Turabian Style

J. Zhai; H. Ma; J. Liao; M. H. Rahaman; Zhongping Yang; Z. Chen. 2017. "Comparison of Fenton, ultraviolet–Fenton and ultrasonic–Fenton processes on organics and colour removal from pre-treated natural gas produced water." International Journal of Environmental Science and Technology 15, no. 11: 2411-2422.

Conference paper
Published: 28 November 2017 in IOP Conference Series: Earth and Environmental Science
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Current study investigated the spatio-temporal distribution of fractional vegetation coverage (FVC) and climatic factors response in Three Gorges Reservoir area from 2000 to 2014 using a dimidiate pixel model. Several data sets were used including the MODIS NDVI data, land use/cover change (LUCC) data and past 15 years of FVC data. Our results suggested that, except 2006 the annual maximum FVC were stable from 2000 to 2014. Extremely arid climate in 2006 influences FVC of Three Gorges area. The annual average FVC of the study area was 91.28%. The monthly mean FVC showed a regular fluctuation, where mean higher FVC values were found from May to August and from December to March of the following years FVC was lower. Overall study area showed an upward trend of FVC from 2000 to 2014, basic invariant areas, slight increased areas and obvious increased areas were accounted for 84.70%, 8.75%, and 0.78% respectively, whereas significantly reduced areas and mild reduction areas were accounted for 1.52% and 4.25% FVC, respectively. The FVC growth areas were mainly distributed in the eastern part of the Three Gorges Reservoir area whereas degraded areas were mainly distributed in the hilly areas of the West and middle of the Three Gorges area. Greater than 2000 meters high mountains the FVC value reached 98.47%, and the slope greater than 25° the regional FVC value reached 92.60%. Strong correlations were observed between monthly mean temperature and FVC (R=0.88), precipitation and FVC (R=0.77), and growth season lag 1 month of FVC values and temperature (R=0.85).

ACS Style

Yan-Jun Zhang; Jun Zhai; Hong-Pu Ma; Zhen-Liang Li; Hasibur Rahaman; Yuan-Gui Dai. Spatio-temporal variation of fractional vegetation coverage and response to climatic factors in Three Gorges Reservoir area from 2010 to 2014. IOP Conference Series: Earth and Environmental Science 2017, 94, 012126 .

AMA Style

Yan-Jun Zhang, Jun Zhai, Hong-Pu Ma, Zhen-Liang Li, Hasibur Rahaman, Yuan-Gui Dai. Spatio-temporal variation of fractional vegetation coverage and response to climatic factors in Three Gorges Reservoir area from 2010 to 2014. IOP Conference Series: Earth and Environmental Science. 2017; 94 (1):012126.

Chicago/Turabian Style

Yan-Jun Zhang; Jun Zhai; Hong-Pu Ma; Zhen-Liang Li; Hasibur Rahaman; Yuan-Gui Dai. 2017. "Spatio-temporal variation of fractional vegetation coverage and response to climatic factors in Three Gorges Reservoir area from 2010 to 2014." IOP Conference Series: Earth and Environmental Science 94, no. 1: 012126.

Journal article
Published: 01 November 2017 in Ecological Engineering
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ACS Style

Jun Zhai; Xiaoting Li; Wei Li; Hasibur Rahaman; Yuting Zhao; Bubo Wei; Haoxuan Wei. Optimization of biomass production and nutrients removal by Spirulina platensis from municipal wastewater. Ecological Engineering 2017, 108, 83 -92.

AMA Style

Jun Zhai, Xiaoting Li, Wei Li, Hasibur Rahaman, Yuting Zhao, Bubo Wei, Haoxuan Wei. Optimization of biomass production and nutrients removal by Spirulina platensis from municipal wastewater. Ecological Engineering. 2017; 108 ():83-92.

Chicago/Turabian Style

Jun Zhai; Xiaoting Li; Wei Li; Hasibur Rahaman; Yuting Zhao; Bubo Wei; Haoxuan Wei. 2017. "Optimization of biomass production and nutrients removal by Spirulina platensis from municipal wastewater." Ecological Engineering 108, no. : 83-92.

Journal article
Published: 01 January 2017 in Desalination and Water Treatment
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ACS Style

Jun Zhai; Quanfeng Wang; Jinsong Zou; Kunping Wang; Haiwen Xiao; Zejin Huang; Hasibur Rahaman; Alphonse Habineza. Decolorization of anthraquinone dye Reactive Blue 4 by natural manganese mineral. Desalination and Water Treatment 2017, 63, 254 -261.

AMA Style

Jun Zhai, Quanfeng Wang, Jinsong Zou, Kunping Wang, Haiwen Xiao, Zejin Huang, Hasibur Rahaman, Alphonse Habineza. Decolorization of anthraquinone dye Reactive Blue 4 by natural manganese mineral. Desalination and Water Treatment. 2017; 63 ():254-261.

Chicago/Turabian Style

Jun Zhai; Quanfeng Wang; Jinsong Zou; Kunping Wang; Haiwen Xiao; Zejin Huang; Hasibur Rahaman; Alphonse Habineza. 2017. "Decolorization of anthraquinone dye Reactive Blue 4 by natural manganese mineral." Desalination and Water Treatment 63, no. : 254-261.

Journal article
Published: 01 December 2016 in Ecological Engineering
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ACS Style

Jun Zhai; Hasibur Rahaman; Xing Chen; Haiwen Xiao; Kaisen Liao; Xiaoting Li; Chuanren Duan; Baoyun Zhang; Guilin Tao; Yasinta John; Jan Vymazal. New nitrogen removal pathways in a full-scale hybrid constructed wetland proposed from high-throughput sequencing and isotopic tracing results. Ecological Engineering 2016, 97, 434 -443.

AMA Style

Jun Zhai, Hasibur Rahaman, Xing Chen, Haiwen Xiao, Kaisen Liao, Xiaoting Li, Chuanren Duan, Baoyun Zhang, Guilin Tao, Yasinta John, Jan Vymazal. New nitrogen removal pathways in a full-scale hybrid constructed wetland proposed from high-throughput sequencing and isotopic tracing results. Ecological Engineering. 2016; 97 ():434-443.

Chicago/Turabian Style

Jun Zhai; Hasibur Rahaman; Xing Chen; Haiwen Xiao; Kaisen Liao; Xiaoting Li; Chuanren Duan; Baoyun Zhang; Guilin Tao; Yasinta John; Jan Vymazal. 2016. "New nitrogen removal pathways in a full-scale hybrid constructed wetland proposed from high-throughput sequencing and isotopic tracing results." Ecological Engineering 97, no. : 434-443.

Journal article
Published: 24 November 2016 in Water
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To improve nutrient removal, a full-scale hybrid constructed wetland (CW) consisting of pre-treatment units, vertical-baffled flow wetlands (VBFWs), and horizontal subsurface flow wetlands (HSFWs) was installed in August 2014 to treat sewage wastewater. Artificial aeration (AA) was applied continuously in the VBFW stage to improve the aerobic condition in the hybrid CW. Water samples were collected and analyzed twice a month between the period of August 2015 and July 2016. The results suggest that this new hybrid CW can achieve a satisfactory reduction of chemical oxygen demand (COD), ammonium nitrogen (NH4+-N), total nitrogen (TN), and total phosphorus (TP) with average removal rates of 85% ± 10% (35% ± 19 g/m2 per day), 76% ± 18% (7% ± 2 g/m2 per day), 65% ± 13% (8% ± 2 g/m2 per day), and 65% ± 21% (1 g/m2 per day), respectively. AA significantly improved the aerobic condition throughout the experimental period, and the positive influence of AA on nitrogen removal was found to be higher during summer that during winter. A significant positive correlation between water temperature and nutrient removal (p < 0.01) was observed in the system. Overall, this study demonstrates the application of AA in a full-scale hybrid CW with satisfactory nutrient removal rates. The hybrid CW system with artificial aeration can serve as a reference for future applications areas where land availability is limited.

ACS Style

Jun Zhai; Jun Xiao; Hasibur Rahaman; Yasinta John; Jingsong Xiao. Seasonal Variation of Nutrient Removal in a Full-Scale Artificial Aerated Hybrid Constructed Wetland. Water 2016, 8, 551 .

AMA Style

Jun Zhai, Jun Xiao, Hasibur Rahaman, Yasinta John, Jingsong Xiao. Seasonal Variation of Nutrient Removal in a Full-Scale Artificial Aerated Hybrid Constructed Wetland. Water. 2016; 8 (12):551.

Chicago/Turabian Style

Jun Zhai; Jun Xiao; Hasibur Rahaman; Yasinta John; Jingsong Xiao. 2016. "Seasonal Variation of Nutrient Removal in a Full-Scale Artificial Aerated Hybrid Constructed Wetland." Water 8, no. 12: 551.

Articles
Published: 19 August 2016 in Environmental Technology
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This study aimed to optimise coagulation pretreatment of the produced water (PW) collected from a natural gas field. Two coagulants, polyferric sulphate (PFS) and polyaluminium chloride (PACl), were applied separately for the organics, suspended solids (SS), and colour removal. Treatment performance at different coagulant dosages, initial pH values, stirring patterns, and the addition of cationic polyacrylamide (PAM) was investigated in jar tests. The optimal coagulation conditions were dosage of PACl 25 g/L or PFS 20 g/L with that of PAM 30 mg/L, initial pH of 11, and fast mixing of 1.5 min (for PACl) or 2 min (for PFS) at 250 rpm followed by slow mixing of 15 min at 50 rpm for both coagulants. PACl performed better than PFS to remove chemical oxygen demand (COD), total organic carbon (TOC), SS, and colour, and achieved a removal efficiency of 90.1%, 89.4%, 99.0%, and 99.9%, respectively, under the optimal condition; while PFS efficiency was 86.1%, 86.1%, 99.0%, and 98.2%, respectively. However, oil removal was higher in PFS coagulation compared to PACl and showed 98.9% and 95.3%, respectively. Biodegradability, ratio of the biological oxygen demand (five-day) (BOD5)/COD, of the PW after pretreatment increased from 0.08 to 0.32 for PFS and 0.43 for PACl. Zeta potential (Z-potential) analysis at the optimum coagulant dosage of PACl and PFS suggests that charge neutralisation was the predominant mechanism during coagulation. Better efficiency was observed at higher pH. The addition of PAM and starring pattern had a minor influence on the removal performance of both coagulants. The results suggest that PACl or PFS can be applied for the pretreatment of PW, which can provide substantial removal of carbon, oil, and colour, a necessary first step for subsequent main treatment units such as chemical oxidation or biological treatment.

ACS Style

Jun Zhai; Zejin Huang; Hasibur Rahaman; Yue Li; Longyue Mei; Hongpu Ma; Xuebin Hu; Haiwen Xiao; Zhiyong Luo; Kunping Wang. Comparison of coagulation pretreatment of produced water from natural gas well by polyaluminium chloride and polyferric sulphate coagulants. Environmental Technology 2016, 38, 1200 -1210.

AMA Style

Jun Zhai, Zejin Huang, Hasibur Rahaman, Yue Li, Longyue Mei, Hongpu Ma, Xuebin Hu, Haiwen Xiao, Zhiyong Luo, Kunping Wang. Comparison of coagulation pretreatment of produced water from natural gas well by polyaluminium chloride and polyferric sulphate coagulants. Environmental Technology. 2016; 38 (10):1200-1210.

Chicago/Turabian Style

Jun Zhai; Zejin Huang; Hasibur Rahaman; Yue Li; Longyue Mei; Hongpu Ma; Xuebin Hu; Haiwen Xiao; Zhiyong Luo; Kunping Wang. 2016. "Comparison of coagulation pretreatment of produced water from natural gas well by polyaluminium chloride and polyferric sulphate coagulants." Environmental Technology 38, no. 10: 1200-1210.

Journal article
Published: 05 April 2016 in Water Science and Technology
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This study aimed to assess the uptake of diclofenac, a widely used nonsteroidal anti-inflammatory pharmaceutical, by a macrophyte Cyperus alternifolius in a mesocosm-scale free water surface (FWS) constructed wetland. Quantitative analysis of diclofenac concentrations in water solution and plant tissues was conducted by high performance liquid chromatography analysis after sample pre-treatment with solid-phase extraction and liquid extraction, respectively. The FWS with Cyperus alternifolius obtained a maximum 69.3% diclofenac removal efficiency, while a control system without plant only had a removal efficiency of 2.7% at the end of the experiment period of 70 days. Based on mass balance study of the experimental system, it was estimated that plant uptake and in-plant conversion of diclofenac contributed about 21.4% of the total diclofenac removal in the mesocosm while the remaining 78.6% diclofenac was eliminated through biotic and abiotic conversion of diclofenac in the water phase. Diclofenac on the root surface and in roots, stems and leaves of Cyperus alternifolius was found at the concentrations of 0.15–2.59 μg/g, 0.21–2.66 μg/g, 0.06–0.53 μg/g, and 0.005–0.02 μg/g of fresh weight of plant tissues, respectively. The maximum bioaccumulation factor of diclofenac was calculated in roots (21.04) followed by root surface (20.49), stems (4.19), and leaves (0.16), respectively. Diclofenac translocation potentiality from root to stem was found below 0.5, suggesting a slow and passive translocation process of diclofenac. Current study demonstrated high potential of Cyperus alternifolius for phytoremediation of diclofenac in FWS and can be applied in other engineered ecosystems.

ACS Style

Jun Zhai; Hasibur Rahaman; Jiucui Ji; Zhiyoung Luo; Quanfeng Wang; Haiwen Xiao; Kunping Wang. Plant uptake of diclofenac in a mesocosm-scale free water surface constructed wetland by Cyperus alternifolius. Water Science and Technology 2016, 73, 3008 -3016.

AMA Style

Jun Zhai, Hasibur Rahaman, Jiucui Ji, Zhiyoung Luo, Quanfeng Wang, Haiwen Xiao, Kunping Wang. Plant uptake of diclofenac in a mesocosm-scale free water surface constructed wetland by Cyperus alternifolius. Water Science and Technology. 2016; 73 (12):3008-3016.

Chicago/Turabian Style

Jun Zhai; Hasibur Rahaman; Jiucui Ji; Zhiyoung Luo; Quanfeng Wang; Haiwen Xiao; Kunping Wang. 2016. "Plant uptake of diclofenac in a mesocosm-scale free water surface constructed wetland by Cyperus alternifolius." Water Science and Technology 73, no. 12: 3008-3016.