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Effect of nitrite on hydrolysis-acidification, biogas production and microbial community in semi-continuous two-phase anaerobic digestion of sewage sludge

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Journal of Environmental Sciences 2023年第4期126卷 434-444页

作者： Qian Sheng Yiqing Lu Shijie Yuan Xiaowei Li Xiaohu Dai Yali Guo Bin Dong State Key Laboratory of pollution control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China School of Environmental and Chemical Engineering Organic Compound Pollution Control EngineeringMinistry of EducationShanghai UniversityShanghai 200444China Shanghai Investigation Design&research Institute Co.Ltd. Shanghai 200335China YANGTZE Eco-Environment Engineering research Center China Three Gorges CorporationBeijing 100038China

Previous study found that the pre-treatment of sewage sludge with nitrite improves the biogas production during the mono/two-phase anaerobic digestion (AD) using batch biochemical methane potential *** this study,the effects of nitrite on hydrolysisacidification,biogas production,volatile solids destruction and microbial composition in semi-continuous two-phase AD of sewage sludge were *** addition of nitrite promotes sludge organic matter solubilization (+484%) and VFAs production (+98.9%),and causes an increase in the VS degradation rate during the AD process (+8.7%).The comparison of biogas production from the acidogenic and methanogenic reactors with or without the addition of nitrite implies that the nitrite has no significant effect on the overall biogas production of two-phase sludge AD ***-throughput sequencing analysis shows that the microbial communities of bacteria and archaea in two-phase AD reactors significantly changes after the addition of *** (bacteria) and Candidatus Methanofastidiosum (archaea) become the dominant genera in the acidogenic and methanogenic reactors with the nitrite *** findings provide new insights about using nitrite to promote the organic matter degradation of sewage sludge in a semicontinuous two-phase AD system.

关键词： Sewage sludge Bioenergy Methane production Nitrite Semi-continuous two-phase anaerobic digestion

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Effect of nitrogen/phosphorus concentration on algal organic matter generation of the diatom Nitzschia palea:Total indicators and spectroscopic characterization

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Journal of Environmental Sciences 2016年第9期28卷 130-142页

作者： Linlin Han Bingbing Xu Fei Qi Zhonglin Chen Beijing Key Laboratory for Source control Technology of water pollution College of Environmental Science and EngineeringBeijing Forestry University State Key Laboratory of the Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences State Key Laboratory of Urban water Resource and Environment Harbin Institute of Technology

Critical algal blooms in great lakes increase the level of algal organic matters（AOMs）,significantly altering the composition of natural organic matters（NOMs） in freshwater of *** study examined the AOM＇s characteristics of Nitzschia palea（***）,one kind of the predominant diatom and an important biomarker of water quality in the great lakes of China,to investigate the effect of AOMs on the variation of NOMs in lakes and the process of algal ***–emission matrix fluorescence（EEM） spectroscopy,synchronous fluorescence（SF） spectroscopy and deconvolution UV–vis（D-UV） spectroscopy were utilized to characterize AOMs to study the effects of nutrient loading on the composition change of *** results,it was revealed that the phosphorus is the limiting factor for ***＇s growth and the generation of both total organic carbon and amino acids but the nitrogen is more important for the generation of carbohydrates and *** spectra revealed differences in the composition of extracellular organic matter and intracellular organic *** of the nitrogen and phosphorus concentrations,aromatic proteins and soluble microbial products were the main components,but the nitrogen concentration had a significant impact on their *** SF spectra were used to study the AOMs for the first time and identified that the protein-like substances were the major component of AOMs,creating as a result of aromatic group *** D-UV spectra showed carboxylic acid and esters were the main functional groups in the EOMs,with –OCH_3,–SO_2NH_2,–CN,–NH_2,–O– and –COCH_3functional groups substituting into benzene rings.

关键词： Extracellular organic matter Intracellular organic matter Nitzschia palea Fluorescence spectroscopy Deconvolution UV–vis spectroscopy

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Impact of municipal solid waste incineration on heavy metals in the surrounding soils by multivariate analysis and lead isotope analysis

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Journal of Environmental Sciences 2019年第8期31卷 47-56页

作者： Yang Li Hua Zhang Liming Shao Xiaoli Zhou Pinjing He State Key Laboratory of pollution control and Resource Reuse Tongji University Institute of Waste Treatment and reclamation Tongji University Shanghai Institute of pollution control and Ecological Security Centre for the Technology research and Training on Household Waste in Small Towns & Rural Area Ministry of Housing Urban-Rural Development

Municipal solid waste(MSW) incineration has become an important anthropogenic source of heavy metals(HMs) to the environment. However, assessing the impact of MSW incineration on HMs in the environment, especially soils, can be a challenging task because of various HM sources. To investigate the effect of MSW incineration on HMs in soils, soil samples collected at different distances from four MSW incinerators in Shanghai, China were analyzed for their contents of eight HMs(antimony, cadmium, chromium, copper,lead, mercury, nickel, and zinc) and lead(Pb) isotope ratios. Source identification and apportionment of HMs were accomplished using principal component analysis and Pb isotope analysis. Results indicated that the relatively high contents of cadmium, lead,antimony, and zinc in the soils at 250 m and 750–1250 m away from the MSW incinerators were related to MSW incineration, while the elevated contents of the other four HMs were associated with other anthropogenic activities. Based on Pb isotope analysis, the contribution ratio of MSW incineration(which had been operated for more than 14 years)to the accumulation of Pb in soil was approximately 10% on average, which was lower than coal combustion only. Incinerator emissions of Pb could have a measurable effect on the soil contamination within a limited area(≤1500 m).

关键词： Municipal solid waste incineration Soils Heavy metals Source identification Pb isotope ratios

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Imidazolium group prompted alkaline anion-exchange membrane with high performance for efficient electrochemical CO_(2) conversion

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Green Energy & Environment 2023年第3期8卷 893-903页

作者： Min Wang Qianqian Zou Xueqi Dong Nengneng Xu Rong Shao Jianfei Ding Yidong Zhang Jinli Qiao School of Chemistry and Chemical Engineering Yancheng Institute of TechnologyYancheng224051China Shanghai Institute of pollution control and Ecological Security Shanghai 200092College of Environmental Science and EngineeringDonghua University2999 Ren'min North RoadShanghai201620China Shanghai Institute of pollution control and Ecological Security Shanghai200092China

Development of high-performance hydroxide-conductive membranes is a focus research subject owing to promising applications in electrochemical reduction of CO_(2)(eCO_(2)RR).However,few satisfactory membranes have been developed to maximize the performance of CO_(2) electrolyzers,despite its role as the core in regulating ion transport and preventing product crossover or fuel ***,we report the synthesis of alkaline anion-exchange membranes fabricated by poly(vinyl-alcohol)(PVA)and poly[(3-methyl-1-vinylimidazoliummethylsulfate)-co-(1-vinylpyrrolidone)](PQ44)for use in CO_(2) *** to the unique imidazolium ring structure coupled with a three-dimensional semiinterpenetrating porous internal architecture,the PVA/PQ44-OH-membranes provide a high hydroxide conductivity(21.47 mS cm^(-1)),preferable mechanical property and thermal *** particular,the eCO_(2)RR used PVA/PQ44-OH^(-) as electrolyte membrane realized a charming Faradaic efficiency(88%)and partial current density(29 mA cm^(-2))at0.96 VRHE and,delivered the excellent durability over 20 h electrolysis in 0.5 mol L^(-1) KHCO_(3) ***,it can even enable an ultrahigh current density beyond 100 mA cm^(-2) at^(-1).11 VRHE when the electrolyte was KOH instead,and produced the FEHCOOof 85%at a low potential of0.81 VRHE,superior to both commercial alkaline A201 and acidic Nafion117 membrane.

关键词： Alkaline anion-exchange membrane Imidazolium ring structure Semi-interpenetrating network CO_(2)electroreduction Formate production

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Ca^2+ and SO4^2- interactions with dissolved organic matter: Implications of groundwater quality for CKDu incidence in Sri Lanka

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Journal of Environmental Sciences 2020年第2期32卷 326-337页

作者： Madhubhashini Makehelwala Yuansong Wei Sujithra K.Weragoda Rohan Weerasooriya State Key Joint Laboratory of Environmental Simulation and pollution control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Department of water pollution control Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China National water Supply and Drainage Board KatugastotaSri Lanka National Institute of Fundamental Studies Hantana RoadKandy 20000Sri Lanka

It has recently been proposed that recalcitrant dissolved organic carbon(DOC) in groundwater plays a potent etiological role in the peculiar distribution of chronic kidney disease of unknown etiology(CKDu).This study aims to elucidate the interactions of Ca^2+and SO4^2-with a model organic fraction of humic acid(SHA) to determine the possible relationship of CKDu incidence with the DOC in drinking *** and FT-IR methods respectively determined the surface functional groups and chemical composition of protonated dissolved organic carbon(HDOC) in a CKDu high-risk zone(HR) of Sri Lanka and in *** surface C composition(87.9%) and lower O(11.4%) were observed for HDOC from the HR region than for SHA(C: 73.8%, O: 24.7%).Aromatic C with less Ocontaining functional groups was observed in *** IR band at 1170 cm^-1 confirms the formation of organic sulfonate(C–SO3^-) on SHA.A band at 1213 cm^-1 due to organic sulfonate in HDOC from the CKDu HR region was also *** IR band at 866 cm^-1 evidenced the formation of CaCO3 on SHA above pH *** data confirmed the presence of sulfur oxidation states corresponding to SO3^2-and SO4^2-at 168.9 eV and 170.1 eV binding energies,*** binding energies at 347 eV and 351 eV for Ca 2p3/2 and Ca 2p1/2 eV,respectively, confirmed the bidentate complexation of Ca^2+with COO-and sulfonate groups on *** organic sulfonate formed is postulated as a uremic toxicant.

关键词： Dissolved organic carbon Sulfate Calcium Ester group Bidentate

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Study on the Preparation,the Magnetic Performance,and the Oxygen Evolution Reaction of LaMnO_(3+δ)

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Journal of Electronic research and Application 2024年第3期8卷 97-103页

作者： Peng Fan Qirui Wu Geming Wang Rahman Sheikh Tamjidur Chendong Shao Wuhan NARI Limited Liability Company State Grid Electric Power Research InstituteNARI Group(State Grid Electric Power Research Institute)Co.Ltd.Wuhan 430074Hubei ProvinceChina Provincial Key Laboratory of Plasma Chemistry and Advanced Materials Wuhan Institute of TechnologyWuhan 430073Hubei ProvinceChina

In this paper,a series of LaMnO_(3+δ)(LMOs)were successfully prepared by adjusting the sintering temperature using the sol-gel method with ABO3-type LMO oxides as the object of *** results showed that with the increase of sintering temperature,the O_(ads),oxygen vacancies,and Mn^(4+)content in the system gradually decreased,and the oxygen evolution reaction(OER)was subsequently *** the suitable Mn^(3+)/Mn^(4+)valence ratio(2.15:1)of the LMO700 sample created a strong ferromagnetic double-exchange effect,the high concentration of oxygen vacancies in LMO700 disturbed this effect and weakened its macro *** paper serves to contribute to the design and development of new magnetic perovskite electrocatalysts.

关键词： Manganese oxides Microstructure Magnetic properties Oxygen evolution reaction

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Preparation and properties of chitosan–metal complex：Some factors influencing the adsorption capacity for dyes in aqueous solution

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Journal of Environmental Sciences 2018年第4期30卷 301-309页

作者： Sadia Rashid Chensi Shen Jing Yang Jianshe Liu Jing Li College of Environmental Science and Engineering Donghua University Shanghai 201620 China State Environmental Protection Engineering Center for pollution Treatment and control in Textile Industry Shanghai 201620 China Beijing Enterprises water group (China) Investment Limited Beijing 100102 China

Chitosan–metal complexes have been widely studied in wastewater treatment, but there are still various factors in complex preparation which are collectively responsible for improving the adsorption capacity need to be further studied. Thus, this study investigates the factors affecting the adsorption ability of chitosan–metal complex adsorbents, including various kinds of metal centers, different metal salts and crosslinking degree. The results show that the chitosan–Fe（ Ⅲ） complex prepared by sulfate salts exhibited the best adsorption efficiency（100%） for various dyes in very short time duration（10 min）, and its maximum adsorption capacity achieved 349.22 mg/g. The anion of the metal salt which was used in preparation played an important role to enhance the adsorption ability of chitosan–metal complex. SO4^（2-） ions not only had the effect of crosslinking through electrostatic interaction with amine group of chitosan polymer, but also could facilitate the chelation of metal ions with chitosan polymer during the synthesis ***, the p H sensitivity and the sensitivity of ionic environment for chitosan–metal complex were analyzed. We hope that these factors affecting the adsorption of the chitosan–metal complex can help not only in optimizing its use but also in designing new chitosan–metal based complexes.

关键词： Chitosan–metal complex Dye removal Coordination anion Adsorption optimization Crosslinking

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Estimating source strengths of HCl and SO_2 emissions in the flue gas from waste incineration

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Journal of Environmental Sciences 2019年第1期31卷 370-377页

作者： Hua Zhang Siyuan Yu Liming Shao Pinjing He State Key Laboratory of pollution control and Resource Reuse Tongji University Institute of Waste Treatment & reclamation College of Environmental Science and Engineering Tongji University Shanghai Institute of pollution control and Ecological Security Centre for the Technology research and Training on Household Waste in Small Towns & Rural Area Ministry of Housing and Urban-Rural Development

HCl and SO_2 emission is one of the major concerns related to municipal solid waste incinerator(MSWI). In this study, a material flow analysis model was developed to estimate the HCl and SO_2 concentrations in the MSWI flue gases(FGs), and their concentrations in the full-scale MSWI were monitored. The calculated concentrations of HCl and SO_2 in the FG were 770–1300 mg/Nm^3 and 150–640 mg/Nm^3, respectively, in close agreement with the monitored values. More than 99% of Cl and 92% of S from the FG were captured into solid residues by the air pollution control(APC) systems. Moreover, since only 48.4%–67.5% of Cl and 21.3%–53.4% of S were transferred to the FG from the municipal solid waste(MSW), it was more reliable to estimate the source strengths and release amounts of HCl and SO_2 in the FG based on the amounts of Cl and S in the APC residues(AR) and exhaust gas rather than in the MSW. This simple method is easily applicable and the estimated results could provide scientific basis for the appropriate design and operation of the APC systems as well as corrosion control of heat recovery systems.

关键词： Municipal solid waste incineration Acid gas Hydrogen chloride Sulfur dioxide Source strength

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Laboratory analyses of nutrient release processes from Haihe River sediment

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International Journal of Sediment research 2012年第1期27卷 61-72页

作者： Min WU Xue-ming SUN Sui-liang HUANG Xian-qiang TANG Miklas SCHOLZ Key Laboratory of pollution Processes and Environmental Criteria of Ministry of Education Nankai University Numerical Simulation group for water Environment Tianjin Key Laboratory of Environmental Remediation and Pollution ControlCollege of Environmental Science and EngineeringNankai University Civil Engineering research Centre School of ComputingScience and EngineeringThe University of Salford

Sediment samples were collected from the heavily contaminated Haihe River to conduct static nutrient release experiments with tap water,and to evaluate the effect of dredging depths,salinity and light on the corresponding release *** study is significant because it helps decision-makers to assess the likely impact of dredging(***) on contaminated freshwater and brackish *** concentrations of total nitrogen and inorganic phosphorus were approximately 950 mg/kg and 760 mg/kg,*** typical organic matter concentration was 8.6%.Data obtained from the nutrient leaching experiments indicated that 5cm-dredging of sediment reduced the water column total phosphorus,total dissolved phosphorus and ammonia-nitrogen concentrations *** contrast,dredging 10cm surface sediment could improve the water *** salinity values benefited the release of nitrogen and phosphorus from *** contrast to indoor experiments, concentrations of total phosphorus,total dissolved phosphorus and ammonia-nitrogen were higher for the outdoor experiments.

关键词： Aquatic sediment and water interaction water quality management Nitrogen Phosphorus Salinity Dredging water depth Light Haihe River China

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Occurrence,removal,and environmental risks of pharmaceuticals in wastewater treatment plants in south China

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Frontiers of Environmental Science & Engineering 2018年第6期12卷 69-79页

作者： Huang Huang Jie Wu Jian Ye Tingjin Ye Jia Deng Yongmei Liang Wei Liu School of Environmental Science and Engineering Sun Yat-sen UniversityGuangzhou 510006China Guangdong Provincial Key Laboratory of Environmental pollution control and Remediation Technology Guangzhou 510006China Foshan water group Co. Ltd.Foshan 528000China

Five pharmaceuticals were detected in wastewater treatment plants in southern China. Biological treatment was the most effective process for PhACs removal. Metoprolol showed negative removal during secondary treatment... 详细信息

关键词： Pharmaceuticals Wastewater treatment Pearl River Delta Occurrence Removal Risk assessment

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