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Decolorization of reactive brilliant red K-2BP by white rot fungus under sterile and non-sterile conditions

Journal of environmental Sciences 2006年第3期18卷 428-432页

作者： GAO Da-wen WEN Xiang-hua QIAN Yi State Key Joint Laboratory of Environmental Simulation and Pollution Control Department of Environment Science and Engineering TsinghuaUniversity Beijing 100084 China.

Almost all the studies both domestic and international using white rot fungus for dye wastewater treatment are performed under sterile conditions. However, it is obviously unpractical that wastewater with dyes is treated under sterile conditions. A feasible study was made for using white rot fungus Phanerochaete chrysosporium to degrade reactive brilliant red K-2BP dye under non-sterile conditions. The results showed that there was no decolorizing effect under non-sterile condition if white rot fungus was incubated under non-sterile condition, and the decolorization was always near to 0% during decolorizing test for 3 d; in the meantime, a lot of yeast funguses were found in liquid medium when white rot fungus was incubated under non-sterile conditions; however, if white rot fungus was incubated under sterile condition firstly, its decolorization was above 90% under non-sterile condition, which was similar to that of sterile condition. So we point out that the treating process for wastewater with dyes should be divided into two stages. The first stage is that white rot fungus should be incubated under sterile conditions, and the second stage is that reactive brilliant red K-2BP is decolorized under non-sterile conditions. The method not only save the operation cost which decolorizing reactive brilliant red K-2BP under sterile condition, but also provide the feasibility for using white rot fungus to degrade wastewater with dyes under non-sterile conditions.

关键词： white rot fungus Phanerochaete chrysosporium reactive brilliant red K-2BP decolorization non-sterile condition

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Progress of Air pollution control in China and Its Challenges and Opportunities in the Ecological Civilization Era

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Engineering 2020年第12期6卷 1423-1431页

作者： Xi Lu Shaojun Zhang Jia Xing Yunjie Wang Wenhui Chen Dian Ding Ye Wu Shuxiao Wang Lei Duan Jiming Hao State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China

China’s past economic growth has substantially relied on fossil fuels,causing serious air pollution *** economic growth and pollution has become the focus in developing ecological civilization in *** have analyzed the three-decade progress of air pollution controls in China,highlighting a strategic transformation from emission control toward air quality *** control of sulfur dioxide(SO2)resolved the deteriorating acid rain issue in China in *** 2013,control actions on multiple precursors and sectors have targeted the reduction of the concentration of fine particulate matter(PM2.5),marking a transition to an air-quality-oriented *** ozone(O3)pollution further requires O3 and PM2.5 integrated control strategies with an emphasis on their complex photochemical *** improvement of air quality in China,as a key indicator for the success of ecological civilization construction,demands the deep de-carbonization of China’s energy system as well as more synergistic pathways to address air pollution and global climate change simultaneously.

关键词： Air pollution control Ecological civilization PM2.5 Low-carbon development Ozone

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In situ monitoring of atmospheric nitrous acid based on multi-pumping flow system and liquid waveguide capillary cell

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Journal of environmental Sciences 2016年第5期28卷 273-284页

作者： Yuhan Liu Keding Lu Huabin Dong Xin Li Peng Cheng Qi Zou Yusheng Wu Xingang Liu Yuanhang Zhang State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking University Institute of Energy and Climate Research: Troposphere (IEK-8) Forschungszentrum Juelich GmbH State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University

In the last four decades, various techniques including spectroscopic, wet chemical and mass spectrometric methods, have been developed and applied for the detection of ambient nitrous acid（HONO）. We developed a HONO detection system based on long path photometry which consists of three independent modules i.e., sampling module, fluid propulsion module and detection module. In the propulsion module, solenoid pumps are applied. With solenoid pumps the pulsed flow can be computer controlled both in terms of pump stroke volume and pulse frequency, which enables the attainment of a very stable flow rate. In the detection module, a customized Liquid Waveguide Capillary Cell（LWCC） is used. The customized LWCC pre-sets the optical fiber in-coupling with the liquid wave guide, providing the option of fast startup and easy maintenance of the absorption photometry. In summer 2014, our system was deployed in a comprehensive campaign at a rural site in the North China Plain. More than one month of high quality HONO data spanning from the limit of detection to 5 ppb were collected. Intercomparison of our system with another established system from Forschungszentrum Juelich is presented and discussed. In conclusion, our instrument achieved a detection limit of 10 ppt V within2 min and a measurement uncertainty of 7%, which is well suited for investigation of the HONO budget from urban to rural conditions in China.

关键词： HONO Photometry Field campaign Atmospheric chemistry

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Lactic acid production from acidogenic fermentation of fruit and vegetable wastes

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Bioresource Technology 2015年 191卷 53-58页

作者： Wu, Yuanyuan Ma, Hailing Zheng, Mingyue Wang, Kaijun State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China

This work focused on the lactic acid production from acidogenic fermentation of fruit and vegetable wastes treatment. A long term completely stirred tank reactor (CSTR) lasting for 50. days was operated at organic loading rate (OLR) of 11. gVS/(L. d) and sludge retention time (SRT) of 3. days with pH controlled at 4.0 (1-24. day) and 5.0 (25-50. day). The results indicated that high amount of approximately 10-20. g/L lactic acid was produced at pH of 4.0 and the fermentation type converted from coexistence of homofermentation and heterofermentation into heterofermentation. At pH of 5.0, the hydrolysis reaction was improved and the total concentration of fermentation products increased up to 29.5. gCOD/L. The heterofermentation was maintained, however, bifidus pathway by Bifidobacterium played an important role. © 2015 Elsevier Ltd.

关键词： Anaerobic digestion

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Effects of adsorbent cake layer on membrane fouling during hybrid coagulation/adsorption microfiltration for sewage organic recovery

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Chemical Engineering Journal 2017年 317卷 751-757页

作者： Gong, Hui Jin, Zhengyu Wang, Qibin Zuo, Jiane Wu, Jing Wang, Kaijun State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China

Direct organic recovery is an alternative option for enhanced energy recovery to achieve energy self-sufficiency or even carbon neutrality for wastewater treatment plants. Previous research reported that hybrid coagulation/adsorption microfiltration is efficient in recovering sewage organics. However, the fouling mechanism of adsorbent cake layer, which was formed during hybrid organic recovery process, needs to be evaluated to develop an appropriate fouling control strategy. In this study, the effects of adsorbent cake layer on the irreversible fouling during actual sewage concentration were analyzed quantitatively. Filtration resistance analysis based on dead-end filtration experiments provided evidences that the existence of adsorbent cake layer prevented severe irreversible fouling. After three filtration cycles, the reduced irreversible fouling by cake layer was as high as 20.84 × 1010 m−1, which was nearly three times of the resistance 7.04 × 1010 m−1when no cake layer existed. This confirmed that the adsorbent cake layer controlled fouling, demonstrating that hybrid coagulation/adsorption microfiltration as a promising process for sewage organic recovery. © 2017 Elsevier B.V.

关键词： Membrane fouling

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A ten liter stacked microbial desalination cell packed with mixed ion-exchange resins for secondary effluent desalination

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environmental Science and Technology 2014年第16期48卷 9917-9924页

作者： Zuo, Kuichang Cai, Jiaxiang Liang, Shuai Wu, Shijia Zhang, Changyong Liang, Peng Huang, Xia State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China

The architecture and performance of microbial desalination cell (MDC) have been significantly improved in the past few years. However, the application of MDC is still limited in a scope of small-scale (milliliter) reactors and high-salinity-water desalination. In this study, a large-scale (>10 L) stacked MDC packed with mixed ion-exchange resins was fabricated and operated in the batch mode with a salt concentration of 0.5 g/L NaCl, a typical level of domestic wastewater. With circulation flow rate of 80 mL/min, the stacked resin-packed MDC (SR-MDC) achieved a desalination efficiency of 95.8% and a final effluent concentration of 0.02 g/L in 12 h, which is comparable with the effluent quality of reverse osmosis in terms of salinity. Moreover, the SR-MDC kept a stable desalination performance (>93%) when concentrate volume decreased from 2.4 to 0.1 L (diluate/concentrate volume ratio increased from 1:1 to 1:0.04), where only 0.875 L of nonfresh water was consumed to desalinate 1 L of saline water. In addition, the SR-MDC achieved a considerable desalination rate (95.4 mg/h), suggesting a promising application for secondary effluent desalination through deriving biochemical electricity from wastewater. © 2014 American Chemical Society.

关键词： Desalination

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pollution sources, characteristics and environmental risk assessment of heavy metals in surface water and sediments of typical pyrite mine in Southwest China

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Journal of environmental Sciences 2025年 157卷 742-755页

作者： Ziqiu Nie Jiabin Luo Jie Tang Bo Li Bohan Chen Man Gao Xingjie Wang Liu Guo College of Ecology and Environment Chengdu University of Technology Chengdu 610059 China State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology Chengdu 610059 China State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution Chengdu University of Technology Chengdu 610059 China China West Normal University College of Environmental Science and Engineering Nanchong 637009 China Institute of Geological Survey China University of Geosciences Wuhan 430074 China

Abandoned mines, especially pyrite-rich ones, release acid mine drainage (AMD) with high acidity and excessive amounts of heavy metals, threatening regional ecosystems. Six samples of mine drainage, nine samples of surface water, and twelve samples of sediment were analyzed in this case study of the Dashu pyrite mine in southwest China. A comprehensive analysis of the pollution levels, pollution sources, and potential hazards of eight metals (Ni, Cd, Cu, Zn, Fe, Al, Pb, and Mn) that exceeded regulatory standards was conducted by monitoring 24 conventional and characteristic indicators. Ultimately, this research evaluated the environmental hazards associated with abandoned mine water using the "pressure-response" model, thereby providing valuable insights for the effective protection of the environment in mining regions. The primary pollutants in mine water were determined to be SO 4 2− , Fe, and Mn, with concentrations of 7700, 1450, and 6.78 mg/L, respectively. A clear "source-sink" dynamic was observed between the mine water and the surrounding water system. surface water was primarily polluted by Ni and Mn, while water system sediments were primarily polluted by Cu and Hg. Ion ratio and Pearson correlation analyses indicated heavy metals in surface water and sediments originated from the same AMD source. The "pressure-response" model was used to assess the environmental hazards of water from abandoned mines. Mines W1, W2, W5, and W6 were classified as high-risk, while W3 and W4 were medium-risk. This study offers a novel approach and valuable reference for identifying and classifying environmental risks in abandoned mines and targeting AMD treatment.

关键词： River pollution

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Sludge-based biochar adsorbent:pore tuning mechanisms,challenges,and role in carbon sequestration

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Biochar 2023年第1期5卷 1419-1441页

作者： Md Manik Mian Wenya Ao Shubo Deng State Key Joint Laboratory of Environment Simulation and Pollution Control(SKLESPC) Beijing Key Laboratory for Emerging Organic Contaminants ControlSchool of EnvironmentTsinghua UniversityBeijing 100084China

Sludge biochar,a carbonized product of raw sludge,contains porous architectures that can act as epicenters for adsorbing external molecules through physical or chemical *** biochar also immobilizes innate micropollutants,which is advantageous over conventional sludge disposal *** date,numerous strategies have been discovered to improve sludge biochar morphology,but the influential factors,pore tuning mechanisms,and process feasibility remain *** knowledge gap limits our ability to design a robust sludge-based ***,we present state-of-the-art sludge biochar synthesis methods with insight into structural and chemical transformation *** and novel concepts for improving sludge biochar porous architecture are *** the first time,sludge biochar properties,adsorption performances,and techno-economic perspectives were compared with commercial activated carbon(AC)to reveal the precise challenges in sludge biochar *** importantly,sludge biochar role in carbon sequestration is detailed to demonstrate the environmental significance of this ***,the review concludes with an overview of prospects and an outlook for developing sludge biochar-based research.

关键词： Sludge-based adsorbent Micropores Feasible methods Challenges Carbon sequestration

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Decomposition of Phragmites australis rhizomes in artificial land-water transitional zones （ALWTZs） and management implications

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Frontiers of Earth Science 2015年第3期9卷 555-566页

作者： Zhen HAN Baoshan CUI Yongtao ZHANG State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 China

Rhizomes are essential organs for growth and expansion of Phragmites australis. They function as an important source of organic matter and as a nutrient source, especially in the artificial land-water transitional zones （ALWTZs） of shallow lakes. In this study, decomposition experiments on 1- to 6-year-old R australis rhizomes were conducted in the ALWTZ of Lake Baiyangdian to evaluate the contribution of the rhizomes to organic matter accumulation and nutrient release. Mass loss and changes in nutrient content were measured after 3, 7, 15, 30, 60, 90, 120, and 180 days. The decomposition process was modeled with a composite exponential model. The Pearson correlation analysis was used to analyze the relationships between mass loss and litter quality factors. A multiple stepwise regression model was utilized to determine the dominant factors that affect mass loss. Results showed that the decomposition rates in water were significantly higher than those in soil for 1- to 6-year-old rhizomes. However, the sequence of decomposition rates was identical in both water and soil. Significant relationships between mass loss and litter quality factors were observed at a later stage, and P-related factors proved to have a more significant impact than N-related factors on mass loss. According to multiple stepwise models, the C/P ratio was found to be the dominant factor affecting the mass loss in water, and the C/N and C/P ratios were the main factors affecting the mass loss in soil. The combined effects of harvesting, ditch broadening, and control of water depth should be considered for lake administrators.

关键词： Phragmites australis rhizomes mass loss,decomposition rates nutrient contents Pearson correlationanalysis Artificial Land-Water Transitional Zone（ALWTZ）

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Comparison of the spatial and temporal variability of macroinvertebrate and periphyton-based metrics in a macrophyte-dominated shallow lake

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Frontiers of Earth Science 2015年第1期9卷 137-151页

作者： Lulu ZHANG Jingling LIU Yi LI State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 China

The influence of spatial differences, which are caused by different anthropogenic disturbances, and temporal changes, which are caused by natural conditions, on macroinvertebrates with periphyton communities in Baiyangdian Lake was compared. Periphyton and macrobenthos assemblage samples were simultaneously col- lected on four occasions during 2009 and 2010. Based on the physical and chemical attributes in the water and sediment, the 8 sampling sites can be divided into 5 habitat types by using cluster analysis. According to coefficients variation analysis （CV）, three primary conclusions can be drawn ：（1） the metrics of Hilsenhoff Biotic Index （HBI）, Percent Tolerant Taxa （PTT）, Percent dominant taxon （PDT）, and community loss index （CLI）, based on macroinvertebrates, and the metrics of algal density （AD）, the proportion of chlorophyta （CHL）, and the proportion of cyanophyta （CYA）, based on periphytons, were mostly constant throughout our study; （2） in terms of spatial variation, the CV values in the macroinvertebratebased metrics were lower than the CV values in the periphyton-based metrics, and these findings may be caused by the effects of changes in environmental factors; whereas, the CV values in the macroinvertebrate-based metrics were higher than those in the periphyton-based metrics, and these results may be linked to the influences of phenology and life history patterns of the macroinvertebrate individuals; and （3） the CV values for the functionalbased metrics were higher than those for the structuralbased metrics. Therefore, spatial and temporal variation for metrics should be considered when assessing applying the biometrics.

关键词： Baiyangdian Lake biomonitoring coefficient variation structural metrics functional metrics

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