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Journal of environmental sciences 2010年第2期22卷 283-289页

作者： bin wu,tongbin chen center for environmental remediation,{2. of geographic sciences and natural resources Research,chinese academy of sciences,beijing 100101,china. [a] center for environmental {2. Institute of Geographic Sciences natural resources Research Chinese Academy of Sciences Beijing 100101 China

Follow-up investigation on hair arsenic concentration was conducted in an arsenic heavily polluted area of southern china.in 2.02.and 2.06. The results showed that the geometric mean of hair arsenic concentration decreased from 2.95 mg/kg in 2.02.to 1.78 mg/kg in 2.06, when the percentage of the population with levels over 1 mg/kg only decreased from 93.4% in 2.02.to 80.5% in 2.06. Over this four-year period, the population with high arsenic concentrations decreased significantly while there was no obvious change in hair arsenic concentration for people who had relatively low concentrations. In terms of age distribution, young and old people had higher hair arsenic concentrations than the middle-aged. All of these results showed that it is difficult to reverse the negative impact of arsenic pollution on human health. Arsenic pollution has a long-term continuous influence on the health of local residents.

关键词： arsenic human health soil contamination hair arsenic

Water-soluble chitosan promotes remediation of Pb-contaminated soil by Hylotelephium spectabile

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Frontiers of environmental Science & Engineering 2024年第7期18卷 109-122页

作者： bingxin Guo Yiwei Zhang Junxing Yang Tianwei Qian Junmei Guo Xiaona Liu Yuan Jiao tongbin {2. Guodi Zheng Wenjun Li Fei Qi College of environmental Science and Engineering Taiyuan University of TechnologyShanxi Key Laboratory of Earth Surface Processes and Resource Ecological Security in Fenhe River BasinShanxi Engineering Research Center of Low Carbon Remediation for Water and Soil Pollution in Yellow River BasinJinzhong 030600China center for environmental {2. Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China University of chinese academy of sciences Beijing 100049China Shanxi Transportation Holding Ecological Environment Co. Ltd.Shanxi 030000China beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and EngineeringBeijing Forestry UniversityBeijing 100083China

Water-soluble chitosan(WSC)has been studied for its ability to mobilize soil Pb and promote the phytoremediation by Hylotelephium spectabile in Pb-contaminated *** aimed to clarify the internal mechanism by which wSC impacts phytoremediation by examining plant growth and Pb accumulation performance of *** as well as the Pb form,functional groups,and mineral phases of Pb-contaminated *** effectively decreased soil pH and activated Pb migration in rhizosphere soils,with a considerable increase in water-soluble and acid-extractable Pb by 2.%-102.and 9%-65%,respectively,and a clear decreasing trend in reducible and oxidizable ***-transform infrared spectroscopy revealed a significant increase in amino and hydroxyl groups in the soil generated by *** coordination of Pb with amino and hydroxyl groups may play an important role in the formation of Pb complexes and activation of Pb in *** field trials,the application of WSC significantly increased Pb accumulation in *** by 12..44%,reaching 92.g/hm^(2..Moreover,the organic matter and nitrogen in the soils were increased by WSc,which improved the growth conditions of *** obvious growth inhibition was observed in either the pot or field ***,WSC is a promising chelating agent for mobilizing Pb in ***,WSC can be potentially used to boost ***-mediated phytoremediation of Pb-contaminatedfarmland.

关键词： Phytoremediation Pb-contaminated soil Water-soluble chitosan Hylotelephium spectabile Fourier transform infrared spectroscopy

Cellular distribution of Pb and As in leaves of metal-scavenging plant Viola principis H. de Boiss

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Acta Geochimica 2006年第S1期 250-251页

作者： Zechun HUANG, tongbin chen, Mei LEI, Xiaoyong LIAO, Yuying HUANG {2. for environmental remediation, institute of geographic sciences and natural resources Research, chinese academy of sciences, beijing 100101, {12.

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植物螯合肽及其在抗重金属胁迫中的作用

生态学报 2003年第10期23卷 2125-2132页

作者：蔡保松雷梅陈同斌张国平陈阳浙江大学农业与生物技术学院浙江杭州310029 中国科学院地理科学与资源研究所环境修复室北京100101

植物螯合肽 (PCs)广泛存在于植物体中 ,与植物抗重金属胁迫关系密切。植物螯合肽及其复合物是一类富含半胱氨酸的低分子量化合物。现有研究证明 ,PCs由谷胱甘肽 (GSH)为底物的酶促反应合成 ,其合成受相关基因的调控 ,从模式植物拟南芥... 详细信息

植物螯合肽 (PCs)广泛存在于植物体中 ,与植物抗重金属胁迫关系密切。植物螯合肽及其复合物是一类富含半胱氨酸的低分子量化合物。现有研究证明 ,PCs由谷胱甘肽 (GSH)为底物的酶促反应合成 ,其合成受相关基因的调控 ,从模式植物拟南芥的突变体中已分离到与 PCs合成有关的几个基因。植物螯合肽首先与重金属离子结合形成低分子量 (LMW)复合物 ,以此形态经由细胞质进入液泡后 ,再与一个分子的植物螯合肽结合 ,形成对植物组织毒性较小的高分子量 (HMW)复合物 ,从而达到缓解重金属对植物的危害作用。就植物螯合肽及其复合物的结构、生物合成、基因调控及重金属解毒机理等进行了综述。

关键词：植物螯合肽重金属植物毒性抗性

Regional assessment of cadmium pollution in agricultural lands and the potential health risk related to intensive mining activities: A case study in chenzhou City, china

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Journal of environmental sciences 2008年第6期20卷 696-703页

作者： ZHAI Limei LIAO Xiaoyong chen tongbin YAN Xiulan XIE Hua {2. bin WANG Lixia center for environmental {2. Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences 11A Datun Road Beijing 100101 China Graduate University of chinese academy of sciences Beijing 100049 China

The purpose of this study was to assess the extent of cadmium （Cd） contamination in agricultural soil and its potential risk for people. Soils, rice, and vegetables from chenzhou City, Southern china.were sampled and analyzed. In the surface soils, the 95% confidence interval for the mean concentration of Cd varied between 2.72.and 4.83 mg/kg （P 〈 0.05） in the survey, with a geometric mean concentration of 1.45 mg/kg. Based on the GIS map, two hot spot areas of Cd in agricultural soils with high Cd concentrations were identified to be located around the Shizhuyuan, Jinshiling, and Yaogangxian mines, and the Baoshan and Huangshaping mines, in the {2. of the city. About 60% of the total investigated area, where the agricultural soil Cd concentration is above 1 mg/kg, is distributed in a central belt across the region. The critical distances, at which the soil Cd concentration were increased by the mining activities, from the mines of the soils were 2. km for the Baoshan mine, 46 km for the Huangshaping mine, and 63 km for the Shizhuyuan mine, respectively. These are distances calculated from models. The Cd concentrations in rice samples ranged from 0.01 to 4.43 mg/kg and the mean dietary Cd intake from rice for an adult was 191 μg/d. Results of risk indexes showed that soil Cd concentrations possessed risks to local residents whose intake of Cd from rice and vegetables grown in soils in the vicinity of the mine was 596 μg/d.

关键词： cadmium health risk mining activities rice soil contamination vegetable

Biodegradation of triclosan and triclocarban in sewage sludge during composting under three ventilation strategies

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Frontiers of environmental Science & Engineering 2019年第3期13卷 137-146页

作者： Bao Yu Guodi Zheng Xuedong Wang Min Wang tongbin chen center for environmental {2. Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China College of resources and Environment University of Chinese Academy of Sciences Beijing 100049 China College of Resource Environment and Tourism Capital Normal University Beijing 100048 China

Triclosan (TCS) and triclocarban (TCC) are widely used in home and personal care products as antimicrobial agents. After these products are used, TCS and TCC enter the terrestrial environment and pose a great risk to humans and animals. In this research, the biodegradation of TCS and TCC was investigated during sewage sludge composting with ventilation rates of 10& 92. and 79 m^3/min. TCS and TCC were mainly biodegraded in the mesophilic and thermophilic phases, and the biodegradation rates improved with an increase in ventilation. After sewage sludge was composted for 16 days with forced ventilation (108 m^3/min), the concentration of TCS decreased from 497.4 to 2.4.5 μg/kg, and the concentration of TCC decreased from 82..2.to 172.7 μg/kg. The biodegradation rates of TCS and TCC were 65.2. and 83.1%, respectively. However, after the sewage sludge was stacked for 16 days, the biodegradation rates of TCS and TCC were only 17.0% and 18.2., respectively. The environmental risks of TCS and TCC in the sewage sludge piles significantly decreased after composting. In the sludge pile with a ventilation rate of 108 m/min, the RQ values of TCS and TCC decreased from 8.2. and 2..58 to 3.58 and 4.32.after composting for 16 days, respectively. There is still a high risk if the sludge compost is directly used as a culture substrate. Nevertheless, the environmental risk could be decreased distinctly if a reasonable quantity of sludge compost is applied to land to ensure an RQ of< 1 for TCS and TCC.

关键词： Sewage sludge Compost Triclosan Triclocarban Ventilation Risk assessment

Role of trichome of Pteris vittata *** arsenic hyperaccu-mulation

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Science china.Life sciences) 2005年第2期48卷 148-154页

作者： LI Wenxue chen tongbin chen Yang LEI Mei center for environmental {2. Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China

environmental scanning electron microscope(ESEM)fitted with an energy disper-sive X-ray microanalyzer(EDX)was used to investigate the surface micromorphology and arse-nic(As)micro-distribution in chinese brake(Pteris vittata L.).It was found that amounts of trichome,which possessed multicellular structure with the average length of 160μm and with an average diameter of 2.μm,existed in the frond of ***,and the density of trichome on the pinnate axial surface was higher than that on the *** X-ray peak of As was recorded in the epidermal cell and *** relative weight of As in the pinnate trichome,which con-tained the highest concentration of As among all tissues of the plant,was 2.4 and 3.9 times as much as that in the epidermal and mesophyllous cells,*** As concentrations in the basal and stalk cells of the same trichome were higher than that in its cap *** is the first time to report that the trichome of *** plays an important role in arsenic *** finding from the present study implies that much attention should be paid to the role of the trichome in understanding the hyperaccumulation and detoxicity of As in the hyperaccumulator and improving the ability of As accumulation.

关键词： arsenic environmental scanning electron microscope(ESEM) hyperaccumulation micro-distribution Pteris vittata L. trichome.

Heavy metal pollution of soils and vegetables in the midstream and downstream of the Xiangjiang River, Hunan Province

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Journal of geographical sciences 2008年第3期18卷 353-362页

作者： WANG Lixia GUO Zhaohui XIAO Xiyuan chen tongbin LIAO Xiaoyong SONG Jie {2. bin center for environmental {2. Institute of Geographic Sciences and Natural Resources Research CAS Beijing 100101 China institute of environmental Engineering School of Metallurgical Science and Engineering Central South University Changsha 410083 China Graduate University of chinese academy of sciences Beijing 100049 China

A total of 2.9 agricultural soil and 48 vegetable samples were collected from the midstream and downstream of the Xiangjiang River（the Hengyang-Changsha section）in Hunan *** accumulation characteristics,spatial distribution and potential risk of heavy metals in the agricultural soils and vegetables were *** are higher accumulations of heavy metals such as As,Cd,Cu,Ni,Pb and Zn in agricultural soils,and the contents of Cd（2.44 mg kg^-1 ）,Pb（65.00 mg kg^-1 ）and Zn（144.13 mg kg^-1 ）are 7.97,3.69 and 1.63 times the corresponding background contents in soils of Hunan Province,respectively. 13.2.of As,68.5%of Cd,2.7%of Cu,2.7%of Ni,8.7%of Pb and 15.1%of Zn in soil samples from the investigated sites exceeded the maximum allowable heavy metal contents in the china.environmental Quality Standard for Soils（GB15618-1995,Grade Ⅱ）.The pollution characteristics of multi-metals in soils are mainly due to *** contents of As,Cd,Cu,Pb and Zn in vegetable soils are significantly higher than the contents in paddy soils.95.8%, 68.8%,10.4%and 95.8%of vegetable samples exceeded the Maximum Levels of Contaminants in Foods（GB2.62.2.05）for As,Cd,Ni and Pb concentrations,*** are significantly positive correlations between the concentrations of Cd,Pb and Zn in vegetables and the concentrations in the corresponding vegetable soils（p〈0.01）.It is very necessary to focus on the potential risk of heavy metals for food safety and human health in agricultural soils and vegetables in the midstream and downstream of the Xiangjiang River,Hunan Province of china.

关键词： Xiangjiang River agricultural soil vegetable heavy metal pollution

Potential of Pteris vittata L. for phytoremediation of sites co-contaminated with cadmium and arsenic: The tolerance and accumulation

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Journal of environmental sciences 2008年第1期20卷 62-67页

作者： XIAO Xiyuan chen tongbin AN Zhizhuang LEI Mei HUANG Zechun LIAO Xiaoyong LIU Yingru center for environmental {2. Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China.

Field investigation and greenhouse experiments were conducted to study the tolerance of Pteris vittata L. （chinese brake） to cadmium （Cd） and its feasibility for remediating sites co-contaminated with Cd and arsenic （As）. The results showed that P. vittata could survive in pot soils spiked with 80 mg/kg of Cd and tolerated as great as 301 mg/kg of total Cd and 2..8 mg/kg of diethyltriaminepenta acetic acid （DTPA）-extractable Cd under field conditions. The highest concentration of Cd in fronds was 186 mg/kg under a total soil concentration of 92. mg As/kg and 98.6 mg Cd/kg in the field, whereas just 2.6 mg/kg under greenhouse conditions. Ecotypes of P. vittata were differentiated in tolerance and accumulation of Cd, and some of them could not only tolerate high concentrations of soil Cd, but also accumulated high concentrations of Cd in their fronds. Arsenic uptake and transportation by P. vittata was not inhibited at lower levels （〈2. mg/kg） of Cd addition. Compared to the treatment without addition of Cd, the frond As concentration was increased by 103.8% at 2. mg Cd/kg, with the highest level of 6434 mg/kg. The results suggested that the Cd-tolerant ecotype of P. vittata extracted effectively As and Cd from the site co-contaminated with Cd and As, and might be used to remediate and revegetate this type of site.

关键词： arsenic (As) cadmium (Cd) chinese brake (Pteris vittata L.) hyperaccumulator phytoremediation tolerance uptake

Assessing the health risk of heavy metals in vegetables to the general population in beijing,china

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Journal of environmental sciences 2009年第12期21卷 1702-1709页

作者： SONG Bo LEI Mei chen tongbin ZHENG Yuanming XIE Yunfeng LI Xiaoyan GAO Ding center for environmental {2. Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Graduate University of chinese academy of sciences Beijing 100039 China

A systematic survey of As, Cd, Cr, Cu, Ni, Pb and Zn concentrations in vegetables from 416 samples （involving 100 varieties） in beijing was carried out for assessing the potential health risk to local inhabitants. The results indicated that the metal concentrations in vegetables ranged from 〈 0.001 to 0.479 μg/g fresh weight （fw）（As）, 〈 0.001 to 0.101 μg/g fw （Cd）, 〈 0.001 to 1.04 μg/g fw （Cr）, 0.02. to 8.2.μg/g fw （Cu）, 0.001 to 1.689 μg/g fw （Ni）, 〈 0.001 to 0.655 μg/g fw （Pb） and 0.01 to 2..6 μg/g fw （Zn）, with average concentrations of 0.013, 0.010, 0.02., 0.51, 0.053, 0.046 and 2.55 μg/g fw, respectively. The results showed that the concentrations of As, Cr, Cu, Cd, Pb and Ni in vegetables from open-fields were all significantly higher than those grown in greenhouses. In addition, in local-produced vegetables, all HMs except Zn were significantly higher than those in provincial vegetables. The estimated daily intake （EDI） of As, Cd, Cr, Cu, Ni, Pb and Zn from vegetables was 0.080, 0.062. 0.142. 3.14, 0.32., 0.2.3 and 15.7 μg/（kg body weight （bw）.d） for adults, respectively. Arsenic was the major risk contributor for inhabitants since the target hazard quotient based on the weighted average concentration （THQw） of arsenic amounted to 44.3% of the total THQ （TTHQ） value according to average vegetable consumption. The TTHQ was lower than 1 for all age groups, indicating that it was still safe for the general population of beijing to consume vegetables.

关键词： heavy metals health risk estimated daily intake beijing vegetable