Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《China Environmental Science》 2015-09
Add to Favorite Get Latest Update

Pollution characteristics and risk assessments of mercury in wastewater-irrigated paddy fields

ZHENG Shun-an;TANG Jie-wei;ZHENG Hong-yan;XUE Ying-hao;ZHENG Xiang-qun;Rural Energy and Environment Agency,Ministry of Agriculture, Centre for Environmental Assessment of Agricultural Producing Area;Agro-Environmental Protection Institute, Ministry of Agriculture;  
A paddy field is typical constructed wetland, where mercury(Hg) is easily methylated to methylmercury(Me Hg). Due to long-term wastewater irrigation, a large area of farmlands, including paddy fields in Tianjin City, has been seriously contaminated with Hg. There is therefore an important question to be answered in our understanding as to the characteristics of total Hg(THg) and/or Me Hg accumulations in rice from wastewater-irrigated areas and risk assessment for evaluation Hg exposure for the population by rice consumption. In this study, a field survey of mercury pollution in 29 paddy fields(soil and rice) from wastewater-irrigated areas around north discharged river in Tianjin city was conducted to evaluate the health risks of mercury to residents by rice consumption. The results showed that: 1. THg and Me Hg concentrations in surveyed paddy fields were(367.04 ± 129.36) μg/kg and(0.87 ± 0.77) μg/kg, respectively, where the total mercury content of back soil was 73μg/kg. Analyses of the distribution of Hg species in different parts of rice plants from selected sampling locations shown that grain contained the lowest THg concentrations(12.80 ± 5.14) μg/kg, followed by stem root leaf. Contrary to THg, the highest concentration of Me Hg was in grain(2.09 ± 1.20 μg/kg, %Me Hg 10%), followed by root stem leaf. This suggests that rice grain may preferentially accumulate Me Hg compared to other parts of the plant. Observations clearly show that Me Hg in the paddy soil could be more easily taken up and transferred to rice grain compared to THg. The probable weekly intake(PWI) of THg and Me Hg for an adult population based on 60 kg body weight(bw) in studied wastewater-irrigated area was 0.068~1.25 μg/(kg·bw) and 0.0095~0.49 μg/(kg·bw), respectively, which were all well below reference dose established by WHO(FAO) or U.S EPA. However, it was clearly manifest that there is a great concern of Me Hg exposure risk for rice consumption around some highly Hg-contaminated areas. There were positive and significant correlations between soil Me Hg concentrations and soil THg concentration, or clay contents in the collected soil samples. Similarly, significant positive correlations were also found between Me Hg concentrations in brown rice and soil THg concentrations, or soil Me Hg concentrations and soil clay contents. This study highlights the potential health risks of Me Hg associated with cultivation and consumption of rice on the wastewater-irrigated areas.
【Fund】: 国家自然科学基金项目(41203084 41371463);; 农业部农业环境重点实验室开放基金
【CateGory Index】: X53;X82
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 LI Xiang-yun,SONG Chao-yu,WANG Rui-ying,WANG Sheng-jian,GAO Jun-ling,ZHU Pi-sheng(Qingdao Academy of Agricultural Sciences,Qingdao 266100,China);Effects of Different Animal Manure Amount on Cauliflower Growth and Soil Fertility[J];Shandong Agricultural Sciences;2008-03
2 WU Huan-tao,WEI Min,YANG Feng-juan,WANG Xiu-feng(College of Horticulture Science and Engineering,Shandong Agricultural University/State Key Laboratory of Crop Biology,Taian 271018,China);Improving Effects of Crop Rotation and Fallowing on Continuous Cucumber Cropping Soil in Solar Greenhouse[J];Shandong Agricultural Sciences;2008-05
3 ZHAO Ming,WANG Wen-jiao,CAI Kui,ZHAO Zheng-yu,YU Qiu-hua(Qingdao Academy of Agricultural Sciences,Qingdao 266100,China);Water-soluble Fluorine Content in Laoshan Green Tea and Its Influencing Factors[J];Shandong Agricultural Sciences;2008-09
4 ZHANG Ying-peng,LI Yan,ZHANG Yu-feng,DONG Liang,SUN Ming(Soil and Fertilizer Institute,Shandong Academy of Agricultural Sciences,Jinan 250100,China);Effects of Water-soluble Chelate Fertilizer on Yield and Nutrient Content of Chinese Onion of Zhangqiu[J];Shandong Agricultural Sciences;2009-04
5 TIAN Ye,LI Yan,SUN Ming,ZHANG Ying-peng*(Soil and Fertilizer Institute,Shandong Academy of Agricultural Sciences,Jinan 250100,China);Effects of Chelate Liquid Fertilizer Application on Yield and Quality of Tomato and Physical and Chemical Characters of Soil in Plastic Greenhouse[J];Shandong Agricultural Sciences;2009-11
6 ZHAO Ming,CAI Kui,WANG Wen-jiao,ZHAO Zheng-yu,CHEN Jian-mei(Qingdao Academy of Agricultural Sciences,Qingdao 266100,China);Effects of Combined Application of Organic and Inorganic Fertilizer on Yield and Quality of Tomato[J];Shandong Agricultural Sciences;2009-12
7 WANG Ke-an1,YANG Ning1,LI Xu-hua2,GUO Pei-qiu2,Lü Xiao-hui1,CHAI Xiu-qian1(1.Vegetable Institute,Shandong Academy of Agricultural Sciences/ Key Laboratory for Biology of Greenhouse Vegetable/Shandong Branch of National Improvement Center for Vegetable,Jinan 250100,China;2.Shandong Agricultural University,Taian 271018,China);Variation Laws of Soil Nutrients in Solar Greenhouses with Different Cultivation Ages[J];Shandong Agricultural Sciences;2010-09
8 DONG Xiao-xia1,SUN Ze-qiang1,ZHANG Li-ming2,WANG Xue-jun1,WANG Qing-mei3,XIE Bei-tao3,ZHENG Dong-feng1(1.Soil & Fertilizer Institute of Shandong Academy of Agricultural Sciences,Jinan 250100,China;2.Shandong Academy of Agricultural Sciences,Jinan 250100,China;3.Crop Institute of Shandong Academy of Agricultural Sciences,Jinan 250100,China);Fertilizer Utilization Efficiency of Sweet Potato in Main Types of Soil in Shandong Province[J];Shandong Agricultural Sciences;2010-11
9 WANG Wei1,YUAN Liang2 (1.Dezhou Academy of Agricultural Sciences,Dezhou 253015,China;2.Institute of Agricultural Resources and Regional Planning,CAAS,Beijing 100081,China);Change Rule of Microbial Biomass Nitrogen in Sheltered Soil and Its Relation with Soil Fertility[J];Shandong Agricultural Sciences;2011-04
10 ZHOU Hai-yan1,WU De-min1,LI Yan2,ZHANG Ying-peng2,LIU Zhao-hui2,JIANG Li-hua2(1.Zhaoyuan Agricultural Technique Extension Center,Zhaoyuan 265400,China;2.Institute of Agricultural Resources and Environment,Shandong Academy of Agricultural Sciences/Shandong ProvincialKey Laboratory of Plant Nutrition and Fertilizer/Shandong Provincial Key Laboratory of Agricultural Non-Point Source Pollution Control,Jinan 250100,China);Effects of Nitrogen Application on Yield,Agronomic Characters and Nitrogen Utilization Efficiency of Winter Wheat with Straw Returning[J];Shandong Agricultural Sciences;2011-05
China Proceedings of conference Full-text Database 10 Hits
1 Li Xiao-liang~(1,2) Li Jian-jiao~1 L(u|¨) Bao-lei~1 Chen Xiao-min~2 Wang Xiao-yang~2 Zhan Guofei~1 (1 College of Urban Construction and Environmental Sciences,Anhui Science and Technology University,Fengyang 233100,China;2 College of Resources and Environmental Sciences,Nanjing Agricultural University,Nanjing 210095,China);Effects of Conjunctive Application of Fertilizer and Gypsum on the Biological Properties of Potting Corn in Coastal Saline Soil[A];[C];2011
2 Yuan Man-man~1,Ye Shu-ya~1,Liu Feng~1,Li Min~1,Wu Xue-zhong~2 (1.Institute of Soil and Fertilizer,Anhui Academy of Agricultural Sciences,HefeiAnhui 230031;2.Wuhu Agricultural Technology Popularization Center,Wuhu Anhui 241000);Different Controlled-release Nitrogen Fertilizer on Yield and Nitrogen Utilization Rate of Maize[A];[C];2011
3 JIANG Guang-yue,GUO Xi-sheng,ZHU hong-bin,HE Chuan-long (Soil and Fertilizer Institute,Anhui Academy of Agricultural Science,Hefei,Anhui 230031);Environmental Quality Evaluation with 7 Heavy Metals of Greenhouse Soil in Hefei City[A];[C];2011
4 JIA bo~(1,2),ZHANG Hou-hu~2,ZHANG Yi~2,WANG Wei~2,WURui2,ZHANG Wei-jia~1 (1.Suzhou Unversity of Science and Technology,School of Environmental Science and Engineering,Suzhou, Jiangsu,215011,China.2.Nanjing Institute of Environmental Sciences,Ministry of Environmental Protection, Jiangsu Nanjing 210042);Effects of Livestock Wastewater NH_4~+-N Incubation on Landfill CH_4 Oxidation by Mineralized Refuse Particle[A];[C];2011
5 LIU Kefeng,WANG Hongli,ZOU Rongsong,SHI Aiping,DAI Zhiyong (Beijing University of agriculture,Beijing,102206);Study on the Best Production Condition of Pig Manure Compost[A];[C];2008
6 LI Hao,MA Wan-li,Wu Yong-sheng,LV Gui-fen (College of life Sciences and Technology,Inner Mongolia Normal University,Huhhot 010022,China);Research on dynamic changes of soil Microbial biomass,soil respiratory intensity in desert grassland of Inner Mongolia[A];[C];2008
7 WANG Shunli~1,JIN Zhulida~1,LIU Kefeng~(1*),ZOU Rongsong~2, WANG Hongli~1,SHI Aiping~1,XING Guangqing~1 (1.Beijing University of agriculture,Beijing,102206; 2.Shenzhou biotechnology company,Inner Mongolia,010200,China);Study on the Influences of Strawberry Growth and Fruit Quality Treated by Different Microbe Organic Fertilizers[A];[C];2008
8 JIN Jian~1 WANG Guang-hua~1 LIU Xiao-bing~1 ZHANG Qiu-ying~1 XU Yan-xia~1 LIU Jun-jie~1 Stephen J Herbert~2 (1.Key lab of black soil,North-east Institute of Geography and Ecological Agriculture,CAS,Harbin 150081,Heilongjiang;2.Department of Plant and Soil Sciences,University of Massachusetts,Amherst 01003,MA,USA);Effect of water-phosphorus interaction on root morphology,yield and quality in soybean[A];[C];2007
9 ;Study on the Cause of Leaf Tipburn,Torpid and Withered,Yellow of Outside Leaf in Bunching Onion[A];[C];2008
10 Zhang Shuqing, Liu Xiumei, Feng Zhaobin ( Institute of soil and fertilizer, Chinese Academy of Agriculture Science, Beijing, 100081 Institute of soil and fertilizer, Jiangxi Academy of Agricultural Science, Nanchang, 330200);Characteristics of Adsorption and Desorption of Humic Acids Made from Airslake-coal to Nitrogen, Phosphorus and Potash[A];[C];2006
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved