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| 1 | Optimization of H_2O_2 dosage in microwave-H_2O_2 process for sludge pretreatment with uniform design method显示文摘A microwave-H2O2 process for sludge pretreatment exhibited high efficiencies of releasing organics,nitrogen,and phosphorus,but large quantities of H2O2 residues were detected.A uniform design method was thus employed in this study to further optimize H2O2 dosage by investigating effects of pH and H2O2 dosage on the amount of H2O2 residue and releases of organics,nitrogen,and phosphorus.A regression model was established with pH and H2O2 dosage as the independent variables,and H2O2 residue and releases of organics,nitrogen,and phosphorus as the dependent variables.In the optimized microwave-H2O2 process,the pH value of the sludge was firstly adjusted to 11.0,then the sludge was heated to 80°C and H2O2 was dosed at a H2O2:mixed liquor suspended solids(MLSS)ratio of 0.2,and the sludge was finally heated to 100°C by microwave irradiation.Compared to the microwave-H2O2 process without optimization,the H2O2 dosage and the utilization rate of H2O2 in the optimized microwave-H2O2 process were reduced by 80% and greatly improved by 3.87 times,respectively,when the H2O2:MLSS dosage ratio was decreased from 1.0 to 0.2,resulting in nearly the same release rate of soluble chemical oxygen demand in the microwave-H2O2 process without optimization at H2O2:MLSS ratio of 0.5. | Qingcong Xiao Hong Yan Yuansong Wei Yawei Wang Fangang Zeng Xiang Zheng | 2012 | Journal of Environmental Sciences2012，24，12： | 12 |
| 2 | Adsorption and biodegradation of three selected endocrine disrupting chemicals in river-based artificial groundwater recharge with reclaimed municipal wastewater显示文摘Endocrine disrupting chemical(EDC) pollution in river-based artificial groundwater recharge using reclaimed municipal wastewater poses a potential threat to groundwater-based drinking water supplies in Beijing, China. Lab-scale leaching column experiments simulating recharge were conducted to study the adsorption, biodegradation, and transport characteristics of three selected EDCs: 17β-estradiol(E2), 17α-ethinylestradiol(EE2) and bisphenol A(BPA). The three recharge columns were operated under the conditions of continual sterilization recharge(CSR), continual recharge(CR), and wetting and drying alternative recharge(WDAR). The results showed that the attenuation effect of the EDCs was in the order of WDAR > CR > CSR system and E2 > EE2 > BPA, which followed first-order kinetics. The EDC attenuation rate constants were 0.0783, 0.0505, and 0.0479 m-1 for E2, EE2 and BPA in the CR system, respectively. The removal rates of E2, EE2, and BPA in the CR system were 98%, 96% and 92%, which mainly depended on biodegradation and were affected by water temperature.In the CR system, the concentrations of BPA, EE2, and E2 in soil were 4, 6 and 10 times higher than in the WDAR system, respectively. According to the DGGE fingerprints, the bacterial community in the bottom layer was more diverse than in the upper layer, which was related to the EDC concentrations in the water-soil system. The dominant group was found to be proteobacteria, including Betaproteobacteria and Alphaproteobacteria, suggesting that these microbes might play an important role in EDC degradation. | Weifang Ma Chao Nie Bin Chen Xiang Cheng Xiaoxiu Lun Fangang Zeng | 2015 | Journal of Environmental Sciences2015，27，5： | 3 |
| 3 | Taxonomic and functional variations in the microbial community during the upgrade process of a full-scale landfill leachate treatment plant-from conventional to partial nitrification-denitrification显示文摘Because of the low access to biodegradable organic substances used for denitrification,the partial nitrification-denitrification process has been considered as a low-cost,sustainable alternative for landfill leachate treatment.In this study,the process upgrade from conventional to partial nitrificationdenitrification was comprehensively investigated in a full-scale landfill leachate treatment plant(LLTP).The partial nitrification-denitrification system was successfully achieved through the optimizing dissolved oxygen and the external carbon source,with effluent nitrogen concentrations lower than 150 mg/L.Moreover,the upgrading process facilitated the enrichment of Nitrosomonas(abundance increased from 0.4%to 3.3%),which was also evidenced by increased abundance of amoA/B/C genes carried by Nitrosomonas.Although Nitrospira(accounting for 0.1%-0.6%)was found to stably exist in the reactor tank,considerable nitrite accumulation occurred in the reactor(reaching 98.8 mg/L),indicating high-efficiency of the partial nitrification process.Moreover,the abundance of Thauera,the dominant denitrifying bacteria responsible for nitrite reduction,gradually increased from 0.60%to 5.52%during the upgrade process.This process caused great changes in the microbial community,inducing continuous succession of heterotrophic bacteria accompanied by enhanced metabolic potentials toward organic substances.The results obtained in this study advanced our understanding of the operation of a partial nitrification-denitrification system and provided a technical case for the upgrade of currently existing full-scale LLTPs. | Binbin Sheng Depeng Wang Xianrong Liu Guangxing Yang Wu Zeng Yiqing Yang Fangang Meng | 2020 | Frontiers of Environmental Science & Engineering2020，14，6： | 3 |
| 4 | Referential significance of sulfur isotopes and separation of S species in black shales of Southwest China显示文摘The states of S species in black shales are very complex, such as organic sulfur, pyrite sulfur and sulphate sulfur. The mineral microtexture, sulfur content and sulfur isotope can indicate the formation conditions and diagenetic processes of the black shales. The S species are separated perfectly and the relation between the content, mineral microtexture and | Chaodong Wu Fangang Zeng Jiajin Lei Rui Zhao | 1999 | Chinese Science Bulletin1999，44，17： | 2 |
| 5 | Rapid determination method for 12 pyrethroid pesticide residues in tea by stir bar sorptive extraction-thermal desorption-gas chromatography显示文摘 | Li Bin Zeng Fangang Dong Qichun | 2012 | Physics Procedia2012，25，： | 1 |
| 6 | Occurrence and distribution of polycyclic aromatic hydrocarbons in organo-mineral particles of alluvial sandy soil profiles at a petroleum-contaminated site显示文摘 | Zhe Lu Fangang Zeng Nandong Xue Fasheng Li | 2012 | Science of the Total Environment2012，，： | 1 |
| 7 | Occurrence and distribution of polycyclic aromatic hydrocarbons in organo-mineral particles of alluvial sandy soil profiles at a petroleum-contaminated site 显示文摘 | Lu Zhe Zeng Fangang Xue Nandong | 2012 | Science of the Total Environment2012，433，： | 1 |
| 8 | Unintelligible low frequency sound enhances simulated cochlear implant speech recognition in noise显示文摘 | CHANG J E BAI J Y ZENG Fangang | 2006 | IEEe transactions on biomedical engineering2006，53，12： | 1 |
| 9 | Cochlear Implants:System Design,Integration,and Evaluation显示文摘 | Zeng Fangang Rebseher S Harrison W | 2008 | IEEE Rev Biomed Eng2008，1，： | 1 |
| 10 | Cochlear implants:System design,integration and evaluation显示文摘 | ZENG Fangang Rebscher S | 2008 | IEEE Reviews in Biomedical Engineering2008，1，： | 1 |
| 11 | Occurrence and distribution of polycyclic aromatic hydrocarbons in organo- mineral particles of alluvial sandy soil profiles at a petroleum-contaminated site显示文摘 | Lu Zhe Zeng Fangang Xue Nandong | 2012 | Science of the Total Environment2012，433，： | 1 |
| 12 | Encoding frequency modulation to improve cochlear implant performance in noise显示文摘 | Nie Kaibao Stickney G Zeng Fangang | 2005 | IEEE Trans Biomed Eng2005，52，： | 1 |
| 13 | Origin, migration and mixing of oilfield brines: Stable isotopic evidence from Kuqa Foreland Basin显示文摘 | Chunfang Cai Jiyang Wang Fangang Zeng Hong He | 2001 | Science in China Series E: Technological Sciences2001，，1： | 1 |
| 14 | Mandarin tone recognition in cochlear-implant subjects显示文摘 | WEI Caogang CAO Keli ZENG Fangang | 2004 | Hearing Research2004，197，： | 1 |
| 15 | Discovery of mega-thick oil sandstone and asphalt in the Jurassic System in the Tula Basin and its significance显示文摘The mega_thick oil_bearing sandstone has been discovered in the Jurassic System in the Tula Basin, among which there are asphalt veins in fractures. The crude oil from oil_bearing sandstone and asphalt in the basin is mature, and similar to that of the Jurassic crude oil in the Qaidam Basin in geochemistry. The discovery not only shows that the Tula Basin can generate hydrocarbon and take on great exploration prospects but also has great implications for the oil and gas exploration in the Qaidam Basin. | Zhaojie Guo Zhicheng Zhang Fangang Zeng | 1998 | Chinese Science Bulletin1998，43，22： | 0 |
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