The Experts below are selected from a list of 12918 Experts worldwide ranked by ideXlab platform
Meng Xiang - One of the best experts on this subject based on the ideXlab platform.
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the occurrence of chloramphenicol and tetracyclines in Municipal Sewage and the nanming river guiyang city china
Journal of Environmental Monitoring, 2009Co-Authors: Guoping Zhang, Ling Li, Meng XiangAbstract:The occurrence of antibiotics including chloramphenciol (CAP), oxytetracycline (OTC) and tetracycline (TC) was studied in Municipal Sewage, river water and sediment. Temporal and spatial variations of antibiotic concentrations in Municipal Sewage, river water and sediment were evaluated. In Municipal Sewage, CAP, OTC and TC concentrations were in the range of 5.8–47.4, 0.16–5.7 and 0.7–65.2 µg L−1, respectively, and showed a temporal variation with high antibiotic concentrations appearing in the cold season. Untreated Municipal Sewage can seriously influence both river water and sediment. Generally, high antibiotic concentrations in river water appeared in winter owing to the low flow condition as well as the high antibiotic concentration in the Sewage. However, high CAP and OTC concentrations in sediment were observed in summer most likely because runoff in high flow season can carry wastes from some origins (e.g. livestock farms in the countryside) into the river. The partitioning of antibiotics in river water and sediment suggests a lower sorption of TCs to the sediment compared to previous studies, which is believed to be caused by the high Ca2+ and Mg2+ concentrations, ionic strength and pH of the river water in the carbonate area.
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Characteristics of Chloramphenicol and Tetracyclines in Municipal Sewage and Nanming River of Guiyang City,China
Environmental Sciences, 2009Co-Authors: Guoping Zhang, Ling Li, Meng XiangAbstract:: The characteristics of chloramphenicol and tetracyclines in Municipal Sewage and Naming River of Guiyang City were studied, using solid-phase extraction with high-performance liquid chromatography-UV detection. The average concentration of chloramphenicol, oxytetracycline, tetracycline and chlortetracycline in Municipal Sewage is 27.0, 2.3, 11.0 and 1.1 microg x L(-1) at northern outfall, and 21.2, 2.1, 9.5 and 0.5 microg x L(-1) at southern outfall. Nanming River is influenced by many antibiotic sources which include agriculture land, surface waste and Municipal Sewage, and the Municipal Sewage is the most important one. The concentration of chloramphenicol, oxytetracycline and tetracycline in river water ranges from 2.1 to 19.0 microg x L(-1), ND to 3.0 microg x L(-1) and 0.8 to 6.8 microg x L(-1) in winter, and 0.2 to 1.3 microg x L(-1), ND to 0.03 microg x L(-1), 0.2 to 0.3 microg x L(-1) in summer. Chlortetracycline was only detected in winter with the concentration range of 0.09 to 0.14 microg x L(-1). The average concentration of the four compounds in sediment is 147.6, 76.6, 99.2 and 1.6 microg x kg(-1) in winter, 195.8, 89.1, 34.4 and 9.0 microg x kg(-1) in summer, respectively. The antibiotics concentration of both river water and Sewage shows a seasonal variation.
Shuying Wang - One of the best experts on this subject based on the ideXlab platform.
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novel two stage partial denitrification pd anammox process for tertiary nitrogen removal from low carbon nitrogen c n Municipal Sewage
Chemical Engineering Journal, 2019Co-Authors: Rui Du, Yongzhen Peng, Baikun Li, Shuying WangAbstract:Abstract High nitrate (NO3−-N) concentration in the effluent of wastewater treatment plants (WWTPs), cannot meet the increasing stringent discharge limits. Hence, the tertiary treatment is necessary to lower the total nitrogen concentration. In this study, an innovative partial denitrification (PD)-Anammox process was applied to remove the nitrate nitrogen (20–40 mg N/L) from secondary effluent. The nitrate wastewater were firstly fed to PD sequencing batch reactor (SBR, 10 L) to produce nitrite along with the low carbon/nitrogen ratio (C/N) Municipal Sewage (NH4+ of 57.8 mg N/L, COD of 175.8 mg/L), then the effluent from SBR was pumped to the anaerobic sludge blanket (UASB, 3.2 L) performing anammox for further nitrogen removal. The integrated process was operated for 224 days with the secondary effluent to Municipal Sewage volume ratio of 2.9–6. The results suggested that an excellent nitrate removal efficiency of 97.9% was achieved, and the mean removal efficiency of NH4+-N and COD from Municipal Sewage were 95.2% and 81.6%, respectively, leading to the total nitrogen and COD concentration in the final effluent as low as 4.0 mg N/L and 30.1 mg/L, respectively. Anammox was the main nitrogen removal pathway with a mean proportion of 78.2%, and Candidatus_Brocadia was identified as the dominating genus. Furthermore, it was found that a minor nitrous oxide (N2O) was produced in the integrated process. The PD-Anammox process was verified to be economically and environmentally feasible for retrofitting of existing plants.
Guoping Zhang - One of the best experts on this subject based on the ideXlab platform.
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the occurrence of chloramphenicol and tetracyclines in Municipal Sewage and the nanming river guiyang city china
Journal of Environmental Monitoring, 2009Co-Authors: Guoping Zhang, Ling Li, Meng XiangAbstract:The occurrence of antibiotics including chloramphenciol (CAP), oxytetracycline (OTC) and tetracycline (TC) was studied in Municipal Sewage, river water and sediment. Temporal and spatial variations of antibiotic concentrations in Municipal Sewage, river water and sediment were evaluated. In Municipal Sewage, CAP, OTC and TC concentrations were in the range of 5.8–47.4, 0.16–5.7 and 0.7–65.2 µg L−1, respectively, and showed a temporal variation with high antibiotic concentrations appearing in the cold season. Untreated Municipal Sewage can seriously influence both river water and sediment. Generally, high antibiotic concentrations in river water appeared in winter owing to the low flow condition as well as the high antibiotic concentration in the Sewage. However, high CAP and OTC concentrations in sediment were observed in summer most likely because runoff in high flow season can carry wastes from some origins (e.g. livestock farms in the countryside) into the river. The partitioning of antibiotics in river water and sediment suggests a lower sorption of TCs to the sediment compared to previous studies, which is believed to be caused by the high Ca2+ and Mg2+ concentrations, ionic strength and pH of the river water in the carbonate area.
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Characteristics of Chloramphenicol and Tetracyclines in Municipal Sewage and Nanming River of Guiyang City,China
Environmental Sciences, 2009Co-Authors: Guoping Zhang, Ling Li, Meng XiangAbstract:: The characteristics of chloramphenicol and tetracyclines in Municipal Sewage and Naming River of Guiyang City were studied, using solid-phase extraction with high-performance liquid chromatography-UV detection. The average concentration of chloramphenicol, oxytetracycline, tetracycline and chlortetracycline in Municipal Sewage is 27.0, 2.3, 11.0 and 1.1 microg x L(-1) at northern outfall, and 21.2, 2.1, 9.5 and 0.5 microg x L(-1) at southern outfall. Nanming River is influenced by many antibiotic sources which include agriculture land, surface waste and Municipal Sewage, and the Municipal Sewage is the most important one. The concentration of chloramphenicol, oxytetracycline and tetracycline in river water ranges from 2.1 to 19.0 microg x L(-1), ND to 3.0 microg x L(-1) and 0.8 to 6.8 microg x L(-1) in winter, and 0.2 to 1.3 microg x L(-1), ND to 0.03 microg x L(-1), 0.2 to 0.3 microg x L(-1) in summer. Chlortetracycline was only detected in winter with the concentration range of 0.09 to 0.14 microg x L(-1). The average concentration of the four compounds in sediment is 147.6, 76.6, 99.2 and 1.6 microg x kg(-1) in winter, 195.8, 89.1, 34.4 and 9.0 microg x kg(-1) in summer, respectively. The antibiotics concentration of both river water and Sewage shows a seasonal variation.
Yongzhen Peng - One of the best experts on this subject based on the ideXlab platform.
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novel two stage partial denitrification pd anammox process for tertiary nitrogen removal from low carbon nitrogen c n Municipal Sewage
Chemical Engineering Journal, 2019Co-Authors: Rui Du, Yongzhen Peng, Baikun Li, Shuying WangAbstract:Abstract High nitrate (NO3−-N) concentration in the effluent of wastewater treatment plants (WWTPs), cannot meet the increasing stringent discharge limits. Hence, the tertiary treatment is necessary to lower the total nitrogen concentration. In this study, an innovative partial denitrification (PD)-Anammox process was applied to remove the nitrate nitrogen (20–40 mg N/L) from secondary effluent. The nitrate wastewater were firstly fed to PD sequencing batch reactor (SBR, 10 L) to produce nitrite along with the low carbon/nitrogen ratio (C/N) Municipal Sewage (NH4+ of 57.8 mg N/L, COD of 175.8 mg/L), then the effluent from SBR was pumped to the anaerobic sludge blanket (UASB, 3.2 L) performing anammox for further nitrogen removal. The integrated process was operated for 224 days with the secondary effluent to Municipal Sewage volume ratio of 2.9–6. The results suggested that an excellent nitrate removal efficiency of 97.9% was achieved, and the mean removal efficiency of NH4+-N and COD from Municipal Sewage were 95.2% and 81.6%, respectively, leading to the total nitrogen and COD concentration in the final effluent as low as 4.0 mg N/L and 30.1 mg/L, respectively. Anammox was the main nitrogen removal pathway with a mean proportion of 78.2%, and Candidatus_Brocadia was identified as the dominating genus. Furthermore, it was found that a minor nitrous oxide (N2O) was produced in the integrated process. The PD-Anammox process was verified to be economically and environmentally feasible for retrofitting of existing plants.
Ling Li - One of the best experts on this subject based on the ideXlab platform.
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the occurrence of chloramphenicol and tetracyclines in Municipal Sewage and the nanming river guiyang city china
Journal of Environmental Monitoring, 2009Co-Authors: Guoping Zhang, Ling Li, Meng XiangAbstract:The occurrence of antibiotics including chloramphenciol (CAP), oxytetracycline (OTC) and tetracycline (TC) was studied in Municipal Sewage, river water and sediment. Temporal and spatial variations of antibiotic concentrations in Municipal Sewage, river water and sediment were evaluated. In Municipal Sewage, CAP, OTC and TC concentrations were in the range of 5.8–47.4, 0.16–5.7 and 0.7–65.2 µg L−1, respectively, and showed a temporal variation with high antibiotic concentrations appearing in the cold season. Untreated Municipal Sewage can seriously influence both river water and sediment. Generally, high antibiotic concentrations in river water appeared in winter owing to the low flow condition as well as the high antibiotic concentration in the Sewage. However, high CAP and OTC concentrations in sediment were observed in summer most likely because runoff in high flow season can carry wastes from some origins (e.g. livestock farms in the countryside) into the river. The partitioning of antibiotics in river water and sediment suggests a lower sorption of TCs to the sediment compared to previous studies, which is believed to be caused by the high Ca2+ and Mg2+ concentrations, ionic strength and pH of the river water in the carbonate area.
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Characteristics of Chloramphenicol and Tetracyclines in Municipal Sewage and Nanming River of Guiyang City,China
Environmental Sciences, 2009Co-Authors: Guoping Zhang, Ling Li, Meng XiangAbstract:: The characteristics of chloramphenicol and tetracyclines in Municipal Sewage and Naming River of Guiyang City were studied, using solid-phase extraction with high-performance liquid chromatography-UV detection. The average concentration of chloramphenicol, oxytetracycline, tetracycline and chlortetracycline in Municipal Sewage is 27.0, 2.3, 11.0 and 1.1 microg x L(-1) at northern outfall, and 21.2, 2.1, 9.5 and 0.5 microg x L(-1) at southern outfall. Nanming River is influenced by many antibiotic sources which include agriculture land, surface waste and Municipal Sewage, and the Municipal Sewage is the most important one. The concentration of chloramphenicol, oxytetracycline and tetracycline in river water ranges from 2.1 to 19.0 microg x L(-1), ND to 3.0 microg x L(-1) and 0.8 to 6.8 microg x L(-1) in winter, and 0.2 to 1.3 microg x L(-1), ND to 0.03 microg x L(-1), 0.2 to 0.3 microg x L(-1) in summer. Chlortetracycline was only detected in winter with the concentration range of 0.09 to 0.14 microg x L(-1). The average concentration of the four compounds in sediment is 147.6, 76.6, 99.2 and 1.6 microg x kg(-1) in winter, 195.8, 89.1, 34.4 and 9.0 microg x kg(-1) in summer, respectively. The antibiotics concentration of both river water and Sewage shows a seasonal variation.
