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| 1 | Electrochemical and spectroscopic characteristics of dissolved organic matter in a forest soil profile显示文摘Dissolved organic matter(DOM) represents one of the most mobile and reactive organic compounds in ecosystem and plays an important role in the fate and transport of soil organic pollutants, nutrient cycling and more importantly global climate change.Electrochemical methods were first employed to evaluate DOM redox properties, and spectroscopic approaches were utilized to obtain information concerning its composition and structure. DOM was extracted from a forest soil profile with five horizons. Diferential pulse voltammetry indicated that there were more redox-active moieties in the DOM from upper horizons than in that from lower horizons.Cyclic voltammetry further showed that these moieties were reversible in electron transfer. Chronoamperometry was employed to quantify the electron transfer capacity of DOM, including electron acceptor capacity and electron donor capacity, both of which decreased sharply with increasing depth. FT-IR, UV-Vis and fluorescence spectra results suggested that DOM from the upper horizons was enriched with aromatic and humic structures while that from the lower horizons was rich in aliphatic carbon, which supported the findings obtained by electrochemical approaches. Electrochemical approaches combined with spectroscopic methods were applied to evaluate the characteristics of DOM extracted along a forest soil profile. The electrochemical properties of DOM, which can be rapidly and simply obtained, provide insight into the migration and transformation of DOM along a soil profile and will aid in better understanding of the biogeochemical role of DOM in natural environments. | Ran Bi Qin Lu Tian Yuan Shungui Zhou Yong Yuan Yanfei Cai | 2013 | Journal of Environmental Sciences2013，25，10： | 11 |
| 2 | Interactively interfacial reaction of iron-reducing bacterium and goethite for reductive dechlorination of chlorinated organic compounds显示文摘The interactively interfacial reactions between the iron-reducing bacterium (Shewanella decolorationis, S12) and iron oxide (α-FeOOH) were investigated to determine reductive dechlorination transformation of chlorinated organic compounds (chloroform and pentachlorophenol). The results showed that the interactive system of S12+ α-FeOOH exhibited relatively high dechlorination rate. By comparison, the S12 biotic system alone had no obvious dechlorination, and the α-FeOOH abiotic system showed low dechlorination rate. The enhanced dechlorination of chloroform and pentachlorophenol in the interactive system of S12+α-FeOOH was derived from the promoted generation of adsorbed Fe(Ⅱ) by S12. A decrease in redox potential of the Fe(Ⅲ)/Fe(Ⅱ) couple in the interactive reaction system was determined by cyclic voltammetry. Our results will give new insight into interactively interfacial reaction between iron-reducing bacterium and iron oxides for degradation of chlorinated organic compounds under anaerobic condition. | LI XiaoMin LI YongTao LI FangBai ZHOU ShunGui FENG ChunHua LIU TongXu | 2009 | Chinese Science Bulletin2009，54，16： | 11 |
| 3 | A study of electron-shuttle mechanism in Klebsiella pneumoniae based-microbial fuel cells显示文摘In microbial fuel cell (MFC), the rate of electron transfer to anode electrode is a key intrinsic limiting factor on the power output of MFCs. Using Klebsiella pneumoniae (K. pneumoniae) strain L17 as biocatalyst, we studied the mechanism of electron shuttle via self-producing mediator in a cubic air-chamber MFC. To eliminate the influence of biofilm mechanism, the anode electrode was coated with microfiltration membrane (0.22 μm). Data showed that the microfiltration membrane coated and uncoated MFCs achieved the maximum voltage outputs of 316.2 and 426.2 mV after 270 and 120 h, respectively. When the medium was replaced in MFCs that had the highest power generation, the power output dropped by 62.1% and 8.8%, and required 120 and 48 h to resume the original level in the coated and uncoated MFCs, respectively. The results suggested an electron-shuttle mechanism rather than biofilm mechanism was responsible for electricity generation in the membrane coated MFC. Cyclic voltammetric measurements demonstrated the presence of an electrochemical active compound produced by K. pneumoniae strain L17, which was identified to be 2,6-di-tert-butyl-p-benzoquinon (2,6-DTBBQ) by GC-MS. 2,6-DTBBQ, as a recyclable electron shuttle, could transfer electrons between K. pneumoniae L17 and the anode electrode. | DENG LiFang LI FangBai ZHOU ShunGui HUANG DeYin NI JinRen | 2010 | Chinese Science Bulletin2010，55，1： | 9 |
| 4 | Phosphate recovery with granular acid-activated neutralized red mud:Fixed-bed column performance and breakthrough curve modelling显示文摘Granular acid-activated neutralized red mud(AaN-RM)has been successfully prepared with good chemical stability and physical strength.However,its potential for industrial application remains unknown.Therefore,the performance of granular AaN-RM for phosphate recovery in a fixed-bed column was investigated.The results demonstrated that the phosphate adsorption performance of granular AaN-RM in a fixed-bed column was affected by various operational parameters,such as the bed depth,flow rate,initial solution pH and initial phosphate concentration.With the optimal empty-bed contact time(EBCT)of 24.27 min,the number of processed bed volumes and the phosphate adsorption capacity reached 496.95 and 84.80 mg/g,respectively.Then,the saturated fixed-bed column could be effectively regenerated with a0.5 mol/L HCl solution.The desorption efficiency remained as high as 83.45%with a low weight loss of 3.57%in the fifth regeneration cycle.In addition,breakthrough curve modelling showed that a 5-9-1 feed-forward artificial neural network(ANN)could be effectively applied for the optimization of the fixed-bed adsorption system;the coefficient of determination(R^2)and the root mean square error(RMSE)evaluated on the validation-testing data were 0.9987 and 0.0183,respectively.Therefore,granular AaN-RM fixed-bed adsorption exhibits promising potential for phosphate removal and recovery from polluted water. | Andong Hu Guoping Ren Jiangang Che Yulin Guo Jie Ye Shungui Zhou | 2020 | Journal of Environmental Sciences2020，32，4： | 4 |
| 5 | Herbicide promotes the conjugative transfer of multi-resistance genes by facilitating cellular contact and plasmid transfer显示文摘The global dissemination of antibiotic resistance genes(ARGs),especially via plasmid-mediated horizontal transfer,is becoming a pervasive health threat.While our previous study found that herbicides can accelerate the horizontal gene transfer(HGT)of ARGs in soil bacteria,the underlying mechanisms by which herbicides promote the HGT of ARGs across and within bacterial genera are still unclear.Here,the underlying mechanism associ-ated with herbicide-promoted HGT was analyzed by detecting intracellular reactive oxygen species(ROS)production,extracellular polymeric substance composition,cell membrane integrity and proton motive force combined with genome-wide RNA sequencing.Exposure to herbicides induced a series of the above bacterial responses to promote HGT except for the ROS response,including compact cell-to-cell contact by enhancing pilus-encoded gene expression and decreasing cell surface charge,increasing cell membrane permeability,and enhancing the proton motive force,providing additional power for DNA uptake.This study provides a mechanistic understanding of the risk of bacterial resistance spread promoted by herbicides,which elucidates a new perspective on nonantibiotic agrochemical acceleration of the HGT of ARGs. | Xi Li Chang Wen Chen Liu Shiyun Lu Zhongbing Xu Qiue Yang Zhi Chen Hanpeng Liao Shungui Zhou | 2022 | Journal of Environmental Sciences2022，34，5： | 2 |
| 6 | Conversion of nitrogen and carbon in enriched paddy soil by denitrification coupled with anammox in a bioelectrochemical system显示文摘The aim of this study is to investigate conversion of nitrogen and COD in enriched paddy soil by nitrification coupled with anammox process in a dual chamber bioelectrochemical system.The paddy soil was enriched for denitrification coupled with anammox by microbial consortia and was acclimatized in the cathodic chamber of microbial fuel cells(MFCs).The bioelectrochemical systems were treated with different ammonium concentrations in the cathodic chamber:the MFC with low concentration ammonium(LA-MFC,50 mg/L ammonium),the MFC with medium concentration ammonium(MA-MFC,500 mg/L ammonium),and MFC with high concentration ammonium(HA-MFC,1000 mg/L ammonium),and the initial COD in the anodic chamber was 1200 mg/L.The CK treatments were conducted with1000 mg/L ammonium under the same conditions,except without inoculum in the cathode chamber.The consumption rate of ammonium in the cathodic chambers of CK,LA-MFC,MA-MFC,and HA-MFC were 9%,64%,84%,and 84%,respectively.The degradation rate for COD achieved in the anode chambers of CK,LA-MFC,MA-MFC,and HA-MFC were 70%,86%,93%,and 93%,respectively.The analysis of the microbial community of three treated MFCs in the cathode chamber indicated that the nitrification-denitrification process occurs in the cathode chamber.The dominant species for nitrification was Nitrospira,and the dominant species for denitrification were Denitratisoma,Dechloromonas,and Candidatus_Competibacter.Moreover,anammox process also observed in the cathode chamber.The functional genes nir S/K,hzs B,and 16S rDNA were assessed by qPCR analysis,and the results confirmed the presence of denitrification-coupled anammox in the cathodic chamber. | Luan Zhang Minghe Jiang Shungui Zhou | 2022 | Journal of Environmental Sciences2022，34，1： | 2 |
| 7 | En- hanced Anaerobic Degradation of Organic Pollutants in a Soil Microbial Fuel Cell显示文摘 | Huang Deyin Zhou Shungui Chen Qing | 2011 | Chem Eng J2011，172，2： | 1 |
| 8 | Manganese dioxide as an alternative cathodic catalyst to platinum in microbial fuel cells显示文摘 | Lixia Zhang Chengshuai Liu Li Zhuang Weishan Li Shungui Zhou Jintao Zhang | 2009 | Biosensors and Bioelectronics2009，，9： | 1 |
| 9 | Mosquito biolarvicide production by sequential fermentation with dual strains of Bacillus thuringiensis subsp, israelensis and Bacillus sphaericus using sewage sludge显示文摘 | ZHUANG Li ZHOU Shungui WANG Yueqiang | 2011 | Biores Tech2011，102，： | 1 |
| 10 | Enhanced Bacillus thuringiensis production from sewage sludge with alkaline and ultrasonic pretreatments 显示文摘 | CHANG Ming ZHOU Shungui LU Na | 2007 | Water Air Soil Pollut2007，186，： | 1 |
| 11 | Electricity gen-eration from starch processing wastewater using microbial fuelcell technology显示文摘 | LU Na ZHOU Shungui ZHUANG Li | 2009 | Biochemical Engineering Journal2009，43，3： | 1 |
| 12 | Starch processing wastewater as a new medium for production of Bacillus thuringiensis 显示文摘 | CHANG Ming ZHOU Shungui LU Na | 2008 | World J Microbiol Biotech2008，24，4： | 1 |
| 13 | Electro catalytic activity of anodic biofilm responses to pH changes in microbial fuel cells显示文摘 | YUAN Yong ZHAO Bo ZHOU Shungui | 2011 | Biores Technol2011，102，13： | 1 |
| 14 | Enhanced performance of air-cathode two-chamber microbial fuel cells with high-pH anode and low-pH cathode显示文摘 | ZHUANG Li ZHOU Shungui LI Yongtao | 2010 | Biores Technol2010，101，10： | 1 |
| 15 | Mem-brane-less cloth cathode assembly(CCA)for scalable micro-bial fuel cells显示文摘 | LI Zhuang ZHOU Shungui WANG Yueqiang | 2009 | Biosensors and Bioelectronics2009，24，12： | 1 |
| 16 | Molecular weight- dependent electron transfer capacities of dissolved organic matter derived from sewage sludge compost显示文摘 | Yong Yuan Shungui Zhou Tian Yuan | 2013 | J Soils Sediments2013，，13： | 1 |
| 17 | Cost-effective production of Bacillus thuringiensis biopesticides by solid-state fermentation using wastewater sludge: Effects of heavy metals显示文摘 | Zhuang Li Zhou Shungui Wang Yueqiang | 2011 | Bioresource Technology2011，102，7： | 1 |
| 18 | Enhanced anaerobic degradation of organic pollutants in a soil microbial fuel cell显示文摘 | Huanga Deyin Zhou Shungui Chen Qing | 2011 | Chemical Engineering Journal2011，172，23： | 1 |
| 19 | Bioelectricity generation and microcystins removal in a blue-green algae powered microbial fuel cell显示文摘 | Yuan Yong Chen Qing Zhou Shungui | 2011 | Hazardous Materials2011，187，123： | 1 |
| 20 | A novel UASB-MFC-BAF integrated system for high strength molasses wastewater treatment and bioeleetricity generation 显示文摘 | ZHANG Baogang ZHAO ttuazhang ZHOU Shungui | 2009 | Bioresouree Technology2009，100，23： | 1 |
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