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Characteristics of microfauna and their relationships with the performance of an activated sludge plant in China

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Journal of environmental Sciences 2008年第4期20卷 482-486页

作者： ZHOU kexin XU Muqi LIU Biao CAO Hong Key Laboratory of Animal Ecology and conservation Biology Institute of Zoology Chinese Academy of Sciences Beijing 100080 China Nanjing Institute of environmental Sciences State Environmental Protection Administration Nanjing 210042 China

The occurrence and abundance of the microfauna groups were compared with the physico-chemical and operational parameters of the Baoding Lugang Sewage Treatment Plant in China. Attached and crawling ciliates were the dominant groups of ciliates. Crawling ciliates and testate amoebae showed a strong association with effluent BOD5 （biochemical oxygen demand）. Therefore, these two groups are likely to be useful bioindicators since their number decreased as the process produced poor quality effluent. Testate amoebae also had significant negative correlations with effluent TN （total nitrogen）, NH4^＋-N, SS （suspended solids） and SVI （sludge volumetric index）, which means that this group of ciliates may be indicators of good performance of the activated sludge system. Carnivorous ciliates and flagellates had significant positive correlations with SVI, suggesting that these two groups may be indicators of bad settlement conditions of sludge. As identification of the microfauna species is difficult and time-consuming, we recommend using microfauna functional groups to evaluate the performance of the activated sludge system.

关键词： microfauna activated sludge indicators sludge biotic index (SBI)

Adsorption of Phenanthrene in Soil to Biochar Modified by β-Cyclodextrin

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Journal of Materials Science and Chemical Engineering 2024年第9期12卷 44-54页

作者： Wanke Chen Qing Guo Xiaoyan Wang Xiao Wang Jing Yuan Qianfeng Zhang Insitute of Molecular Engineering and Applied Chemistry Anhui University of Technology Maanshan China Department of Civil Engineering Tongling University Tongling China Department of Civil Engineering Manitoba University Winnipeg Canada

In this study, the adsorption effect of β-cyclodextrin modified biochar (BC) on phenanthrene (PHE) in contaminated soil was investigated, aiming to provide an efficient and environmentally friendly remediation strategy for Polycyclic Aromatic Hydrocarbons (PAHs) contaminated soil. Through kinetic and isotherm analysis, β-CDBC-CA showed excellent phenanthrene adsorption performance, and the adsorption effect increased with the increase of time and was affected by temperature. The results show that β-CDBC-CA can not only effectively adsorb phenanthrene in soil, but also serve as a surfactant to help desorption phenanthrene adsorbed by soil organic matter and improve the efficiency of microbial degradation. The experimental data showed that the Elovich model could describe the adsorption behavior of β-CDBC-CA on phenanthrene well, while Langmuir and Freundlich models performed better in fitting parameters, revealing the adsorption mechanism of phenanthrene in contaminated soil by β-cyclodextrin-modified biochar. In addition, temperature has a significant effect on the adsorption capacity of β-CDBC-CA, and its application in soil remediation can be optimized by adjusting temperature. This study not only provides new materials and technical means for soil remediation but also provides important data support for an in-depth understanding of the environmental behavior of PAHs. By citing relevant research results, this study further improves the control and understanding of environmental risks of PAHs, which is of great significance for the protection of ecological environment and human health.

关键词： PAHs Biochar β-Cyclodextrin Modification Adsorption Soil Remediation

Nocturnal atmospheric chemistry of NO_(3) and N_(2)O_(5) over Changzhou in the Yangtze River Delta in China

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Journal of environmental Sciences 2022年第4期34卷 376-390页

作者： Chuan Lin Renzhi Hu Pinhua Xie Shengrong Lou Guoxian Zhang Jinzhao Tong Jianguo Liu Wenqing Liu Key Laboratory of environmental Optics and Technology Anhui Institute of Optics and Fine MechanicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China CAS Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361000China State environmental protection Key Laboratory of the Formation and Prevention of Urban Air Pollution complex Shanghai Academy of Environmental SciencesShanghai 200233China

comprehensive observations of the nocturnal atmospheric oxidation of NO_(3)and N_(2)O_(5)were conducted at a suburban site in Changzhou in the YRD using cavity ring-down spectroscopy(CRDS)from 27 May to 24 June,*** concentrations of NO_(3)precursors were observed,and the nocturnal production rate of NO_(3)was determined to be 1.7±1.2 ppbv/***,the nighttime NO_(3)and N_(2)O_(5)concentrations were relatively low,with maximum values of 17.7 and 304.7 pptv,respectively,illustrating the rapid loss ofNO_(3)andN_(2)O_(5).Itwas found that NO_(3)dominated the nighttime atmospheric oxidation,accounting for 50.7%,whileO3 andOH only contributed 34.1%and 15.2%,*** the reactions of NO_(3)with volatile organic compounds(VOCs),styrenewas found to account for 60.3%,highlighting its dominant role in the NO_(3)*** general,the contributions of the reactions between NO_(3)and VOCs and the N_(2)O_(5)uptake to NO_(3)losswere found to be about 39.5%and 60.5%,respectively,indicating that N_(2)O_(5)uptake also played an important role in the loss of NO_(3)and N_(2)O_(5),especially under the high humidity conditions in *** formation of nitrate at night mainly originated from N_(2)O_(5)uptake,and the maximum production rate of NO_(3)^(-)reached 6.5 ppbv/*** average NOx consumption rate via NO_(3)and N_(2)O_(5)chemistry was found to be 0.4 ppbv/h,accounting for 47.9%of the total NO_(x)*** predominant roles of NO_(3)and N_(2)O_(5)in nitrate formation and NO_(x)removal in the YRD region was highlighted in this study.

关键词： Nitrate radical(NO_(3)) Dinitrogen pentoxide(N_(2)O_(5)) Cavity ring-down spectroscopy(CRDS) Styrene N_(2)O_(5)uptake Nighttime chemistry

Effectiveness of coal mine dust control:A new technique for preparation and efficacy of self-adaptive microcapsule suppressant

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International Journal of Mining Science and Technology 2022年第6期32卷 1181-1196页

作者： Bo Ren Liang Yuan Gang Zhou Shuailong Li Qunzhi Meng Kai Wang Bingyou Jiang Guofeng Yu School of Emergency Management and Safety Engineering China University of Mining and Technology–BeijingBeijing 100083China State Key Laboratory of Deep coal Mining&Environment protection Huainan Mining Group Co.LTD.Huainan 232001China Key Laboratory of Industrial Dust control and Occupational Health Ministry of EducationAnhui University of Science and TechnologyHuainan 232001China college of Safety and environmental Engineering Shandong University of Science and TechnologyQingdao 266590China Department of Civil and environmental Engineering University of AlbertaEdmonton T6G 2R3Canada

This study aims to make full use of the agricultural waste peanut shells to lower material costs and achieve cleaner production at the same *** nanofibrils(CNF)extracted from peanut shells were mixed with acrylic acid(AA)and dimethyl diallyl ammonium chloride(DMDAAC)to prepare a new type of capsule core(dust suppressant).Then,the self-adaptive AA-DM-CNF/CA microcapsules were prepared under the action of calcium *** infrared spectroscopy and X-ray diffraction analysis results suggest that AA,DMDAAC and CNF have experienced graft copolymerization which leads to the formation of an amorphous *** scanning electron microscopy analysis results demonstrate that the internal dust suppressant can expand and break the wall after absorbing water,featuring a self-adaptive ***,the laser particle size analysis results show that the microcapsules,inside which the encapsulated dust suppressant can be observed clearly,maintain a good *** product performance experimental results reveal that the capsule core and the capsule wall achieve synergistic dust suppression,thus lengthening the dust suppression *** product boasts good dust suppression,weather resistance,degradation and synergistic combustion ***,this study,as the first report on the development and analysis of dust-suppressing microcapsules,fills in the research gap on the reaction mechanism between dust-suppressing microcapsules and coal by MS *** proposed AA-DM-CNF/CA dust-suppressing microcapsules can effectively lower the dust concentration in the space and protect the physical and mental health of coal *** general,this research provides a new insight into the structure control and performance enhancement of dust *** the application range of microcapsules is of crucial economic and social benefits.

关键词： Waste peanut shell AA-DM-CNF/CA Self-adaptive Dust suppression microcapsule Molecular dynamics simulation

Effects of rhamnolipids on bacterial communities in a dioxin-contaminated soil and the gut of earthworms added to the soil

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Pedosphere 2023年第6期33卷 927-937页

作者： Bing XIA Dan HUANG Mao YE Hao QIU Hongfeng CHEN Keqiang ZHAO Rongliang QIU Rongrong YING Nanjing Institute of environmental Sciences of the Ministry of environmental protection(NIES) Nanjing 210042China Research Academy of environmental Sciences of anhui Province Hefei 230071China college of environmental and Resource Sciences Zhejiang UniversityHangzhou 310058China Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China Shanghai Jiao Tong University School of Environmental Science and EngineeringShanghai 200240China Guangdong Laboratory for Lingnan Modern Agriculture College of Natural Resources and EnvironmentSouth China Agricultural UniversityGuangzhou 510642China

The biosurfactants rhamnolipids and the “soil ecosystem engineers” earthworms are often used to remediate contaminated soils. However, the effects of rhamnolipids on earthworm intestinal flora and microbial community in soil containing earthworms are not clearly understood. In our study, a 21-d microcosm experiment was carried out to reveal the effects of rhamnolipids on microbial abundance, composition, and metabolism, as well as contaminant degradation capacity. Both rhamnolipids and earthworms had positive effects on soil bacteria. Rhamnolipid-amended soil(RT) showed higher bacterial abundance and metabolic activity than earthworm-amended soil(ET), while the improvement in bacterial composition and contaminant degradation capacity by rhamnolipids was lower than that by earthworms. Notably, these effects were further amplified by the combined treatment of rhamnolipids and earthworms(RET). Specifically, the bacterial abundance(log-transferred) increased from 9.5 copies g-1in the control with no addition to 10.3, 10.6, and 11.1 copies g-1in ET, RT, and RET, respectively. compared to ET, the relative abundance of the dominant phylum, Proteobacteria, increased from 41.66% to 51.67% in RET,and more pollutant-degrading bacteria were also enriched in RET. Therefore, the increases in bacterial abundance and contaminant-degrading bacteria led to the following ranking of soil dioxin removal rate: RET(77.28%) > ET(59.83%) > RT(24.65%) > control(4.71%). Moreover, the addition of rhamnolipids enhanced the abundance of bacterial functional genes involved in metabolism and environmental information processing. In addition, the composition and diversity of bacteria in the gut of earthworms were conspicuously affected by rhamnolipids, and the relative abundance of Microbacterium and Shewanella increased significantly(P composition, and metabolism of the microbial community in earthworm g

关键词： bioremediation biosurfactant contaminant-degrading bacteria intestinal bacteria metabolic pathway metabolism microcosm experiment soil pollution

Estimation of the resident’s additional dose in bone-coal mining areas of the five provinces

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Nuclear Science and Techniques 2005年第4期16卷 249-252页

作者： JIANG Shan ZHANG Liang YE Ji-Da KONG Ling-Li LI Ying SHI Jin-Hua WU Zong-Mei environmental Radiation Surveillance Station of anhui Province Hefei 230061 environmental Monitoring Center Station of Hunan Province Changsha 410004 environmental Radiation Monitoring Station of Zhejiang Province Hangzhou 310012 Wuhan Academy of environmental Science Wuhan 430015 environmental Monitoring Center Station of Jiangxi Province Nanchang 330029

This paper introduces the resident’s additional dose in bone-coal mining areas. The increase of the annual additional effective doses accepted by the residents living in the carbide-brick houses, the staffs working in the car-bide-brick houses and the miners working in the bone-coal mining areas of Hubei, Hunan, Jiangxi, Zhejiang and An-hui Provinces is caused by the rising of environmental radioactive level. The investigation of natural background ra-diation in the bone-coal mining areas indicated that both mining and utilizing bone-coal cause the rise of environ-mental radioactive level. The ranges of the annual additional effective dose accepted by the residents, staffs and min-ers is 1.9—6.8 mSv, 0.5—2.0 mSv and 8.2—71 mSv, and with an average of 3.8 mSv, 1 mSv and 40 mSv, respec-tively. The annual additional effective doses accepted by part residents and staffs exceed the dose limit of 1 mSv for public exposure, and part miners exceed the dose limit of 20 mSv for occupational exposure. And the contribution of dose caused by inhaled radon to the total additional effective dose is over 76%.

关键词：骨煤放射性等级碳化物环境影响

The collective dose equivalent in evaluated region of bone-coal power stations and bone-coal shafts

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Nuclear Science and Techniques 2005年第4期16卷 253-256页

作者： ZHANG Liang JIANG Shan KONG Ling-Li LI Ying YE Ji-Da SHI Jin-Hua WU Zong-Mei environmental Monitoring Center Station of Hunan Province Changsha 410004 environmental Radiation Surveillance Station of anhui Province Hefei 230061 Wuhan Academy of environmental Science Wuhan 430015 environmental Monitoring Center Station of Jiangxi Province Nanchang 330029 environmental Radiation Monitoring Station of Zhejiang Province Hangzhou 310012

During 1991-1993, the radioactivity levels of the bone-coal mines were investigated in Hubei, Hunan, Ji-angxi, Zhejiang and anhui Provinces, respectively, where the reserve of bone-coal is about 90% of our country’s total reserve. The annual additional collective dose equivalent within 80km evaluated region of bone-coal power stations in Nijiangkou and Anren is 1.7 and 1.9 man·mSv, respectively, and that of Zhuantanyan bone-coal shaft is 1.4 man·mSv. The collective dose equivalent caused by bone-coal cinder brick produced for 25 years in the five prov-inces is 1.6×105 man Sv.

关键词：骨煤环境影响环境保护放射性等级环境监测

The influence of Al contents and heat treatments on magneto-mechanical hysteresis damping of Fe-Al alloys

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The influence of Al contents and heat treatments on magneto-...

Synthesis and Characterization of β-Cyclodextrin Modified Biochar environmental Remediation Materials

第二届海峡两岸功能材料科技与产业峰会（2015）

作者： ZHOU Zheng-Cun GUO De-Wen DU Jie YANG Hong YAN Yong-Jian GU Su-Yi School of Mechanical and Electronic Engineering Suzhou Vocational University anhui Guozhen environmental protection Science and Technology Joint Stock co. Ltd

The influencing rules and mechanisms of Al contents and heat treatments on the magneto-mechanical hysteresis damping of Fe-Al alloys were investigated using a functional internal friction apparatus in this paper. It was shown that the air-cooled Fe-10.5(at.%) Al alloy possesses the optimum damping capacity and the Fe-29(at.)%Al and Fe-38(at.) %Al alloys have lower the damping than the Fe-10.5(at.%) Al alloy with the same heat treatments. The as-cast and water-quenched Fe-Al alloys exhibit the low damping capacity. In addition,the heat treatment temperature has an important effect on the damping capacity of the Fe-Al alloys. A appropriate heating temperature is necessary to obtain high damping capacity for Fe-Al alloys. The damping capacity of Fe-Al alloys is decreased when the heating temperature of heat treatments is enhanced.

关键词： Fe-Al alloys magneto-mechanical damping Al contents heat treatment

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Journal of Materials Science and Chemical Engineering 2024年第4期12卷 42-52页

作者： Qing Guo Xiao Wang Wanke Chen Xiaoyan Wang Jing Yuan Qianfeng Zhang Institute of Molecular Engineering and Applied Chemistry Anhui University of Technology Ma&#8217anshan China Department of Civil Engineering Tongling University Tongling China Department of Civil Engineering Manitoba University Winnipeg Canada

In this paper, biochar (BC) was used as raw material, activated by deionizing aqueous solution, NaCl solution, CA solution and HCl solution respectively. Epichlorohydrin (EPI) was used as crosslinking agent, and β-cyclodextrin (β-CD) was used to modify biochar (BC). The prepared modified biochar materials were labeled with β-CDBC, β-CDBC-Na, β-CDBC-CA and β-CDBC-H, respectively. The infrared spectrum, X-ray diffractometer, scanning electron microscope and specific surface area of the four modified materials were tested. The results showed that the C-O stretching vibration peak at 1020 cm−1 of the modified materials was slightly offset compared with that of biochar. The characteristic absorption peaks of XRD pattern decrease obviously at 2θ = 26.7˚ and 29.5˚. It can be obviously observed on the electron microscope image that the surface is loaded or formed clathrates, and BET data and graphs also show that the specific surface area of the modified biochar is larger. Therefore, β-cyclodextrin successfully modified biochar and formed clathrates on the surface of biochar or was loaded in the pore structure of biochar, especially β-CDBC-CA achieved better modification effect. Because biochar and β-cyclodextrin raw materials are cheap, easy to prepare and green, and less prone to secondary pollution, it has a good advantage in environmental governance.

关键词： Biochar Β-Cyclodextrin Modification Clathrate Green environmental protection