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Effect of simulated rain on leaching behavior of mercury from 22 typical soils and key influence factors identification |
ZHENG Shun-an1,2, ZHOU Wei1, XUE Ying-hao1, YIN Jian-feng1, HUANG hong-kun1, ZHENG Xiang-qun2 |
1. Rural Energy & Environment Agency, Ministry of Agriculture, Beijing 100125, China;
2. Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China |
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Abstract The leaching characteristics of mercury (2mg/kg Hg spiked in soil) and their influencing factors in 22 Chinese soils under simulated rain (pH 5.6) through soil column experiments were investigated in this study. The results indicated that the Hg release process of the studied soils could be divided into 3 classes. Firstly, concentrations of Hg in soil leachates from class 1 during leaching process was very low, and less than Groundwater Quality Standard for Class Ⅲ (1μg/L), which included black soil from Jilin, chernozem from Jilin, felty soil from Tibet, paddy soil from Hunan, dark-brown soil from Jilin, yellow soil from Fujian, yellow soil from Jiangsu, chestnut soil from Inner Mongolia. Secondly, Hg in soil leachates from class 2 were comparatively low, less than Groundwater Quality Standard for Class Ⅲ in the early of leaching process (2~3L), then it increased significantly at the middle of leaching process, and decreased from 5~15μg/L down to below Groundwater Quality Standard for Class Ⅲ at the end of leaching process (5~6L), which included red soil from Guangxi, yellow soil from Guizhou, brown soil from Liaoning, sierozem from Gansu and loessal soil from Shanxi. Thirdly, The release mechanism of Hg in soils of class 3appears to be consisted of two phases involving the initial rapid process (leachate are less than 4L) followed by a slow continuous process (leachate exceeds 4L), which included the other 9soils (latosol from Henan, yellow-brown soil from Jiangsu, purple soil from Chongqing, cinnamon soil from Hebei, latosolic red soil from Guangxi, fluvo-aquic soil from Tianjin, salt-affected soil from Jilin, red soil from Jiangxi, brown desert soil from Xinjiang). It was also found that the cumulative release rates of Hg from studied soils were accounted for 0.33% (yellow soil from Guizhou)-5.95% (black soil from Jilin), on an average of 1.55%. Stepwise multiple regression analysis showed that release of Hg from soils might be related to soil organic matter (OM), pH, and soil total Hg (THg) (lnq=1.8+0.62lnTHg-0.109pH-0.918lnOM) These 3factors could describe 58.65% of the variability in Hg release from soils.
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Received: 22 February 2017
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[1] |
Sanchez F, Mattus C H, Morris M I, et al. Use of a New Leaching Test Framework for Evaluating Alternative Treatment Processes for Mercury-Contaminated Soils[J]. Environmental Engineering Science. 2002,19(4):251-269.
|
[2] |
Ngoc M N, Dultz S, Kasbohm J. Simulation of retention and transport of copper, lead and zinc in a paddy soil of the Red River Delta, Vietnam[J]. Agriculture Ecosysterms & Environment. 2009,129(1-3):8-16.
|
[3] |
高扬,朱波,汪涛,等.人工模拟降雨条件下紫色土坡地生物可利用磷的输出[J]. 中国环境科学, 2008,28(6):542-547.
|
[4] |
于素华,杨守祥,刘春生,等.水分淋洗下菜园土壤各形态锌的迁移转化特征[J]. 水土保持学报, 2006,(4):31-34..
|
[5] |
傅臣家,刘洪禄,吴文勇,等.六价铬在土壤中吸持和迁移的试验研究[J]. 灌溉排水学报, 2008,45(2):223-231.
|
[6] |
白雪,黄京晶,金旗,等.EDDS在模拟酸雨条件下对紫色土Cd,Hg淋溶风险研究[J]. 西南师范大学学报自然科学版, 2014,(7):151-156.
|
[7] |
陶春军,周涛发,李湘凌,等.模拟酸雨及施磷对水稻土中汞的淋溶特性影响研究[J]. 资源调查与环境. 2008,29(2):139-144.
|
[8] |
Terši? T, Biester H, Gosar M. Leaching of mercury from soils at extremely contaminated historical roasting sites (Idrija area, Slovenia)[J]. Geoderma, 2014,(s226-227):213-222.
|
[9] |
鲁如坤.土壤农业化学分析方法[M]. 北京:中国农业科技出版社, 2000.
|
[10] |
GB/T 22105.1-2008.土壤质量总汞、总砷、总铅的测定原子荧光法第1部分:土壤中总汞的测定[S].
|
[11] |
GB15618-1995土壤环境质量标准[S].
|
[12] |
HJ694-2014水质汞、砷、硒、铋和锑的测定原子荧光法[S].
|
[13] |
谢思琴,周德智.模拟酸雨下土壤中铜,镉行为及急性毒性效应[J]. 环境科学, 1991,12(2):24-28.
|
[14] |
Yu J, Klarup D. Extraction kinetics of copper, zinc, iron, and manganese from contaminated sediment using disodium ethylenediaminetetraacetate[J]. Water, Air, & Soil Pollution., 1994,75(3):205-225.
|
[15] |
Finzgar N, Lestan D. Multi-step leaching of Pb and Zn contaminated soils with EDTA[J]. Chemosphere, 2007,66(5):824-832.
|
[16] |
Lestan D, Finzgar N. Leaching of Pb contaminated soil using ozone/UV treatment of EDTA extractants[J]. Separation Science and Technology, 2007,42(7):1575-1584.
|
[17] |
郭朝晖,廖柏寒.酸雨中SO42-, NO3-, Ca2+, NH4+对红壤中重金属的影响[J]. 中国环境科学, 2002,22(1):6-10.
|
[18] |
Miller W P, Mc Fee W W, Kelly J M. Mobility and retention of heavy metals in sandy soils[J]. Journal of Environmental Quality, 1983,12(4):579-591.
|
[19] |
Bollen A, Biester H. Mercury extraction from contaminated soils by l -cysteine:Species dependency and transformation processes[J]. Water, Air, & Soil Pollution, 2011,219(1):175-189.
|
[20] |
Issaro N, Abi-Ghanem C, Bermond A. Fractionation studies of mercury in soils and sediments:A review of the chemical reagents used for mercury extraction[J]. Analytica Chimica Acta, 2009, 631(1):1-12.
|
[21] |
Bloom N S, Preus E, Katon J, et al. Selective extractions to assess the biogeochemically relevant fractionation of inorganic mercury in sediments and soils[J]. Analytica Chimica Acta., 2003,479(2):233-248.
|
[22] |
郑顺安,徐志宇,王飞,等.稳定同位素202Hg稀释技术测定土壤汞有效性——与化学提取方法比较[J]. 土壤学报, 2015,(1):87-94.
|
[23] |
郑顺安,王飞,李晓华,等.利用稳定同位素202Hg稀释技术判定不同来源有机肥施用对外源汞在土壤中形态分布的影响[J]. 环境科学学报, 2013,33(11):3111-3117.
|
[24] |
Yin Y, Allen H E, Li Y, et al. Adsorption of mercury (Ⅱ) by soil:Effects of pH, chloride, and organic matter[J]. Journal of Environmental Quality, 1996,25(4):837-844.
|
[25] |
Haynes K M, Mitchell C P J. Precipitation input and antecedent soil moisture effects on mercury mobility in soil-laboratory experiments with an enriched stable isotope tracer[J]. Hydrological Processes, 2015,29(18):4161-4174.
|
[26] |
Linde M, öborn I, Gustafsson J P. Effects of changed soil conditions on the mobility of trace metals in moderately contaminated urban soils[J]. Water, Air, & Soil Pollution, 2007, 183(1):69-83.
|
[27] |
Schuster E. The behavior of mercury in the soil with special emphasis on complexation and adsorption processes-A review of the literature[J]. Water, Air, & Soil Pollution, 1991,56(1):667-680.
|
[28] |
丁振华,王文华,瞿丽雅,等.贵州万山汞矿区汞的环境污染及对生态系统的影响[J]. 环境科学, 2004,25(2):111-114.
|
|
|
|