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持久性有机污染物论坛2018暨化学品环境安全大会

作者： Han Qu Ruixue Ma Bin Wang Gang Yu Beijing Key Laboratory of Emerging Organic Contaminants Control State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment South China Institute of Environmental Sciences Ministry of Environmental Protection

＜正＞*** Illicit drugs, which non-medical use is forbidden by the laws, have been abused widely around the world and cannot be completely metabolized by the human and wastewater treatment（1）. Therefore, it is crucial to estimate the aquatic toxicity and fate of illicit drugs. Previous studies have been performed in all over the world to detected levels of illicit drugs in surface waters（2）.

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Species Diversity, Growth, Status, and Biovolume of Taia River Riparian Forest in Southern Sierra Leone: Implications for Community-Based Conservation

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International Journal of Forestry Research 2020年第1期2020卷

作者： Fayiah, Moses Kallon, Baimba F. Dong, Shikui James, Mathew S. Singh, Sanjay State Key Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 China Department of Forestry School of Natural Resources Management Njala University Moyamba District Southern Province Sierra Leone Department of Biological Sciences School of Environmental Sciences Njala University Moyamba District Southern Province Sierra Leone Biodiversity and Climate Change Division Indian Council of Forestry Research and Education Dehradun India

Riparian forest inventory is essential in understanding the floristic biodiversity and provides necessary information on the growth trend and status of plant diversity along forest ecosystem, especially the riparian forests. This study was undertaken to assess the species diversity, growth status, and bio-volume of Taia riparian forest for community-based conservation intervention. In this study, we enumerated 602 individual trees, which comprised 49 species that belong to 37 genera in 25 families. In total, 14 rectangular plots of dimension 20 × 50 m2 were demarcated. All trees species within the sampled plots having diameter at breast height [Dbh] ≥7 cm were identified and height measured using the Haga altimeter, girth and measuring tape to determine the growth status. The result shows that 83% of the trees enumerated have [Dbh] that range from 7 to 30 cm, whereas 17% had [Dbh] greater than 30 cm. Funtumia africana and Trichilia heudelotii were the dominant species in almost all aspects in the study area. Meliaceae, Apocynaceae, and Mimosaceae were the dominant families with the highest species. The Shannon diversity index was 3.094, whereas the Simpson and Evenness diversity was 0.9303 and 0.4502, respectively. Other diversity indices estimated were Margalef 7.544, Equitability 0.7949, and Fisher_alpha 12.77. The overall biovolume was 283.05 m,3 with a total basal cover of 12.54 m2. Height and [Dbh] were not significantly correlated with the biovolume. Biotic pressure such as fuelwood collection, unsustainable charcoal production, pole harvesting, bushfires, and other traditional and cultural functions contributes greatly to the exploitation of the riparian forest. Therefore, urgent strategic conservation and protection measures should be adopted to prevent further degradation of forest ecosystems along river banks in the district and other ecologies in Sierra Leone. © 2020 Moses Fayiah et al.

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Six-day measurement of size-resolved indoor fluorescent bioaerosols of outdoor origin in an office

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Particuology 2017年第2期15卷 161-169页

作者： Yangyang Xie Oscar A. Fajardo Weizhuo Yan Bin Zhao Jingkun Jiang Department of Building Science School of Architecture Tsinghua University Beijing 100084 China Beijing Key Laboratory oflndoorAir Quality Evaluation and Control Tsinghua University Beijing 100084 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084 China

Indoor airborne bioaerosols of outdoor origin play an important role in determining the exposure of humans to bioaerosols because people spend most of their time indoors. However, there are few studies focusing on indoor bioaerosols originating from outdoors. In this study, indoor versus outdoor size-resolved concentrations and particle asymmetry factors of airborne fluorescent bioaerosols in an office room were measured continuously for 6 days （144 h） using a fluorescent bioaerosol detector. The windows and door of this room were closed to ensure that there was only air infiltration; moreover, any human activities were ceased during sampling to inhibit effects of indoor sources. We focused on fine particles, since few coarse particles enter indoor environments, when windows and doors are closed. Both indoor and outdoor fluorescent bioaerosol size distributions were fit with two-mode lognormal distributions （indoor R2 = 0.935, outdoor R2 = 0.938）. Asymmetry factor distributions were also fit with lognormal distributions （indoor R2 = 0.992, outdoor R2 = 0.992）. Correlations between indoor and outdoor fluorescent bioaerosol concentrations show significant concentration-attenuation and a time lag during the study period. A two-parameter, semi-empirical model was used to predict concentrations of indoor fluorescent bioaerosols of outdoor origin. The measured and predicted concentrations had a linear relationship for the studied size fractions, with an R2 for all size fractions of larger than 0.83.

关键词： Fluorescent bioaerosols Indoor air Outdoor air Waveband integrated bioaerosol sensor（WIBS）Particle size distributions Concentrations

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Study on adsorption of lead by biochar prepared from sludge of municipal wastewater treatment plant

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IOP Conference Series: Materials Science and Engineering 2019年第1期479卷

作者： W Lei T T Li N Q Lv H Liu Y Zhang B D Xi State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution Chinese Research Academy of Environmental Sciences Beijing 100012 China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing 100012 China

In general, with the increase of pyrolysis temperature, the adsorption effect of the prepared biochar to Pb2+ is *** the same experimental conditions at 25°C, the adsorption capacity of biochar prepared by pyrolysis of sludge at 600°C was highest which was 611.8 mg/g. The adsorption kinetics of Pb2+ in solution by BC600 is better fitted to the first order kinetic equation. With the increase of pH value of solution, the adsorption capacity of lead increased from 441.3 mg/g to 650.6 mg/g.

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Pure zeolite X synthesized from coal fly ash by pretreatment with solid alkali and using seed crystal

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IOP Conference Series: Materials Science and Engineering 2019年第1期479卷

作者： N Q Lv T G Zhou H Liu T T Li Y Zhang Y Zhao J W Sun B D Xi State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution Chinese Research Academy of Environmental Sciences Beijing 100012 China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing 100012 China

Coal fly ash was the main burning by-products in a coal-fired power station, which is a major global environmental problem and is threat to public health and environmental pollution. In this study, the optimum condition of synthesized zeolite from fly ash were investigated. The results showed that the optimum conditions were that the OH-concentration, the Si/Al ratio, the solid liquid ratio and aging time were 0.75 mol/L, 2.8, 9 ml/g and 0.5 h, respectively, for the synthesis of zeolites X. It is suggested that this method for synthesized zeolite X from coal fly ash is an efficient technology.

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Effect of current emission abatement strategies on air quality improvement in China:A case study of Baotou,a typical industrial city in Inner Mongolia

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Journal of environmental Sciences 2017年第7期29卷 383-390页

作者： Xionghui Qiu Lei Duan Siyi Cai Qian Yu Shuxiao Wang Fahe Chai Jian Gao Yanping Li Zhaoming Xu State Key Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China Collaborative Innovation Centre for Regional Environmental Quality Tsinghua UniversityBeijing 100084China Environmental Protection Bureau of Baotou Baotou 014000China

The national Air pollution Prevention and control Action Plan required significant decreases in PM_（2.5） levels over *** explore more effective emission abatement strategies in industrial cities,a case study was conducted in Baotou to evaluate the current national control *** total emissions of SO_2,NO_X,PM_（2.5） and NMVOC（non-methane volatile organic compounds） in Baotou were 211.2 Gg,156.1 Gg,28.8 Gg,and 48.5 Gg,respectively in 2013,and they would experience a reduction of 30.4%,26.6%,15.1%,and 8.7%,respectively in 2017 and 39.0%,32.0%,24.4%,and 12.9%,respectively *** SO_2,NO_Xand PM_（2.5） emissions from the industrial sector would experience a greater decrease,with reductions of 37%,32.7 and 24.3%,*** 2013 to 2020,the concentrations of SO_2,NO_2,and PM_（2.5） are expected to decline by approximately 30%,10% and 14.5%,*** reduction rate of SNA（sulfate,nitrate and ammonium）concentrations was significantly higher than that of PM_（2.5） in 2017,implying that the current key strategy toward controlling air pollutants from the industrial sector is more powerful for *** air pollution control measures implemented in the industrial sector could greatly reduce total emissions,constraining the emissions from lower sources such as residential coal combustion would be more effective in decreasing the concentration of PM_（2.5） from 2017 to *** results suggest that even for a typical industrial city,the reduction of PM_（2.5） concentrations not only requires decreases in emissions from the industrial sector,but also from the low emission *** seasonal variation in sulfate concentration also showed that emission from coal-burning is the key factor to control during the heating season.

关键词： Emission abatement strategies Emission inventory Air pollutants CMAQ

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Formation and control of disinfection byproducts and toxicity during reclaimed water chlorination： A review

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Journal of environmental Sciences 2017年第8期29卷 51-63页

作者： Ye Du Xiao-Tong Lv Qian-Yuan Wu Da-Yin Zhang Yu-Ting Zhou Lu Peng Hong-Ying Hu Environmental Simulation and Pollution Control State Key Joint Laboratory State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC) School of Environment Tsinghua University Beijing 100084 China Key Laboratory of Microorganism Application and Risk Control of Shenzhen Graduate School at Shenzhen Tsinghua University Shenzhen 518055 China Shenzhen Environmental Science and New Energy Technology Engineering Laboratory Tsinghua-Berkeley Shenzhen Institute Shenzhen518055 China

Chlorination is essential to the safety of reclaimed water; however, this process leads to concern regarding the formation of disinfection byproducts（DBPs） and toxicity. This study reviewed the formation and control strategies for DBPs and toxicity in reclaimed water during *** regulated and emerging DBPs have been frequently detected in reclaimed water during chlorination at a higher level than those in drinking water, indicating they pose a greater risk to humans. Luminescent bacteria and Daphnia magna acute toxicity, anti-estrogenic activity and cytotoxicity generally increased after chlorination because of the formation of DBPs. Genotoxicity by umu-test and estrogenic activity were decreased after chlorination because of destruction of toxic chemicals. During chlorination, water quality significantly impacted changes in *** tended to attenuate toxicity changes by reacting with chlorine to form chloramine,while bromide tended to aggravate toxicity changes by forming hypobromous acid. During pretreatment by ozonation and coagulation, disinfection byproduct formation potential（DBPFP）and toxicity formation potential（TFP） occasionally increase, which is accompanied by DOC removal; thus, the decrease of DOC was limited to indicate the decrease of DBPFP and TFP. It is more important to eliminate the key fraction of precursors such as hydrophobic acid and hydrophilic neutrals. During chlorination, toxicities can increase with the increasing chlorine dose and contact time. To control the excessive toxicity formation, a relatively low chlorine dose and short contact time were required. Quenching chlorine residual with reductive reagents also effectively abated the formation of toxic compounds.

关键词： Reclaimed water Chlorination Disinfection byproducts Toxicity Precursor

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Degradation of sulfamethazine by persulfate activated with OMt/nZVI

Degradation of sulfamethazine by persulfate activated with O...

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持久性有机污染物论坛2018暨化学品环境安全大会

作者： Junxue Wu Bin Wang Gang Yu Beijing Key Laboratory of Emerging Organic Contaminants Control State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University

*** Sulfonamides(SAs) has been widely applied to prevent and treat infections for both humans and animals in the world due to the advantages of low cost, chemical stability and broad antibiotic activity. One of the most widely used SAs in aquaculture and livestock production is well known as sulfamethazine(SMZ). SMZ is generally characterized by low sorption potential in the soil and high contamination potential in surface and groundwater. Owing to the stronger hydrophobicity and larger lamellar space,

关键词： Degradation of sulfamethazine by persulfate activated with OMt/nZVI TBA

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Decolorization of Methyl Orange by a new clay-supported nanoscale zero-valent iron:Synergetic effect,efficiency optimization and mechanism

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Journal of environmental Sciences 2017年第2期29卷 8-17页

作者： Xiaoguang Li Ying Zhao Beidou Xi Xiaoguang Meng Bin Gong Rui Li Xing Peng Hongliang Liu School of Environment Beijing Normal UniversityBeijing 100875China State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution Chinese Research Academy of Environmental SciencesBeijing 100012China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China School of Environmental and Municipal Engineering Lanzhou Jiaotong UniversityLanzhou 730070China Center for Environmental Systems Stevens Institute of TechnologyHobokenNJ 07030USA

In this study, a novel nanoscale zero-valent iron（n ZVI） composite material was successfully synthesized using a low-cost natural clay, ＂Hangjin 2~#clay＂（HJ clay） as the support and tested for the decolorization of the azo dye Methyl Orange（MO） in aqueous solution by n ZVI particles. According to the characterization and MO decolorization experiments, the sample with 5：1 HJ clay-supported n ZVI（HJ/n ZVI） mass ratio（HJ-n ZVI5） showed the best dispersion and reactivity and the highest MO decolorization efficiency. With the same equivalent Fe0 dosage, the HJ-n ZVI1 and HJ-n ZVI5 samples demonstrated a synergetic effect for the decolorization of MO： their decolorization efficiencies were much higher than that achieved by physical mixing of HJ clay and n ZVIs, or the sum of HJ clay and n ZVIs alone. The synergetic effect was primarily due to the improved dispersion and more effective utilization of the n ZVI particles on/in the composite materials. Higher decolorization efficiency of MO was obtained at larger HJ-n ZVI dosage, higher temperature and under N2 atmosphere, while the MO initial concentration and p H were negatively correlated to the efficiency. HJ clay not only works as a carrier for n ZVI nanoparticles, but also contributes to the decolorization through an ＂adsorption-enhanced reduction＂ mechanism. The high efficiency of HJ-n ZVI for decontamination gives it great potential for use in a variety of remediation applications.

关键词： Nanoscale zero-valent iron Clay Material optimization Methyl Orange

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Enhanced permeability of rGO/S-GO layered membranes with tunable inter-structure for effective rejection of salts and dyes

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Separation and Purification Technology 2019年 220卷 309-319页

作者： Peng Zhang Ji-Lai Gong Guang-Ming Zeng Biao Song Siyuan Fang Mi Zhang Hong-Yu Liu Shuang-Yan Huan Ping Peng Qiu-Ya Niu Dong-Bo Wang Jun Ye Key Laboratory of Environmental Biology and Pollution Control (Hunan University) Ministry of Education College of Environmental Science and Engineering Hunan University Changsha 410082 PR China State Key Laboratory for Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha 410082 PR China College of Materials Science and Engineering Hunan University Changsha 410082 PR China Hunan Qing Zhi Yuan Environmental Protection Technology Co. Ltd Changsha 410004 PR China

In this work, a novel rGO/S-GO laminated membrane was prepared by a pressure-assembly stacked method, followed with a thermal deoxygenation process. The neighboring interlayer spacing ( d ) between the composite layers are tunable due to the incorporation of S-GO. The nano-filtration performances of the rGO/S-GO laminated membranes were evaluated at a low-pressure condition. Molecule dynamics (MD) simulation was used to further investigate the size distribution of spacing between GO, rGO and S-GO sheets. The results of filtration experiments indicated that the obtained rGO/S-GO membrane showed a satisfied rejection performance for the removal of dyes and salts with a pressure of two bar. The rejection rates of MB, CR, RB and MO were 99.5%, 99.9%, 97.3% and 98.6%, while the rejection rates of Na 2 SO 4 , MgSO 4 , MgCl 2 and NaCl were 86.3%, 40.9%, 35.7% and 60.5%, respectively. Compared to the pristine rGO membrane, the water permeation of rGO/S-GO laminated membrane was significantly improved from ∼0.98 to ∼3.78 L/(m 2 ·h·bar) due to the enlarged ‘gateway’ for transport of water molecules. The results of classical MD simulation showed that the neighboring layer spacing of rGO, GO and S-GO was ∼8.4, ∼10.2, and ∼14.3 Å, respectively. Their neighboring layer spacing was dependent on the chemical functional groups on the edges of GO sheets. It was further confirmed that the introduction of chemical groups on the GO caused the expansion of the interlayer ‘gap’ between neighboring sheets, which was responsible for the enhanced permeability. These findings would contribute to the development of GO-based nanofiltration membranes with high permeability and understanding the transport mechanism of water molecule.

关键词： Composite membrane Graphene oxide Water treatment Low pressure

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