|
|
A simulation study on the effect of salinity on the fractions distribution of exogenous mercury in the wastewater-irrigated area of Tianjin City |
ZHENG Shun-an1,2, HAN Yun-lei3, LI Xiao-hua1, XUE Ying-hao1, DUAN Qing-hong1, 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;
3. Chinese Association of Agricultural Science Society, Beijing 100125, China |
|
|
Abstract This study was designed to pinpoint the effect of salinity (NaCl and Na2SO4, add at salinity levels of 0~5%, respectively) on the species distribution of exogenous Hg (II) in wastewater-irrigated areas of Tianjin City. The fractions distribution of mercury in the studied fluvo-aquic soils were investigated by a modified Tessier scheme of sequential extraction procedures (SEPs), which detected with a quantitative analytical method and an isotopic 202Hg labeling method, respectively. Furthermore, the pools of isotopically exchangeable Hg (E-value) in soils which used as indictor of content of soil available Hg were also calculated based on the isotope ratios of RHg (202Hg/200Hg). It was showed that after amendments of exogenous 202Hg in salt-amended soils, isotope ratios of RHg (202Hg/200Hg) significantly varied in exchangeable (including water-soluble), fulvic acid and humic acid fractions, while barely changed in the fractions of carbonate, Fe/Mn oxides, organic, and residual species. It was also found that by comparison of the control without salt amendment, NaCl spiked to soils resulted in the more movement of exogenous 202Hg toward more instable fractions, including water exchangeable and fulvic acid fractions, while the distribution of exogenous Hg speciation in soils was not significantly influenced by Na2SO4. The content of isotopic exchangeable fraction (E-value) in 5% NaCl-amended soil increased by 51% compared with that in the control soil. E-value as a function of Cl-1content in soil could be simulated by linear model (lnE = 0.0961lnCl + 4.895, n = 7, R2 = 0.918). The study manifested that NaCl can significantly increase migration of Hg(II) in the soil irrigated with wastewater, which may enhance Hg(II) bioavailability in the soil and cause a hazard to surface water. Especially, it will be harmful to human body through the food chain.
|
Received: 23 September 2016
|
|
|
|
|
[1] |
张学询,王连平,宋胜焕.天津污灌区土壤作物重金属污染状况的研究 [J]. 中国环境科学, 1988,8(2):20-26.
|
[2] |
王祖伟,张 辉.天津污灌区土壤重金属污染环境质量与环境效应 [J]. 生态环境, 2005,14(2):211-213.
|
[3] |
郑顺安,唐杰伟,郑宏艳,等.污灌区稻田汞污染特征及健康风险评价 [J]. 中国环境科学, 2015,35(9):2729-2736.
|
[4] |
Laing G D, Vos R D, Vandecasteele B, et al. Effect of salinity on heavy metal mobility and availability in intertidal sediments of the Scheldt estuary [J]. Estuarine Coastal & Shelf Science, 2008, 77(4):589-602.
|
[5] |
Ghallab A, Usman A. Effect of Sodium Chloride-induced Salinity on Phyto-availability and Speciation of Cd in Soil Solution [J]. Water Air & Soil Pollution, 2007,185(1):43-51.
|
[6] |
陈小娇,李取生,杜烨锋,等.外源重金属在珠江河口湿地土壤中的形态转化 [J]. 生态与农村环境学报, 2010,26(3):251-256.
|
[7] |
王祖伟,刘 欣,么相姝,等.可溶性无机盐对土壤中镉形态分布及生物可利用性的影响 [J]. 农业环境科学学报, 2008,27(3): 884-888.
|
[8] |
Nolan A L, Zhang H, Mclaughlin M J. Prediction of zinc, cadmium, lead, and copper availability to wheat in contaminated soils using chemical speciation, diffusive gradients in thin films, extraction, and isotopic dilution techniques [J]. Journal of Environmental Quality, 2005,34(2):496-507.
|
[9] |
Vogl J, Pritzkow W. Isotope dilution mass Spectrometry—a primary method of measurement and its role for RM certification [J]. Mapan, 2010,25(3):135-164.
|
[10] |
GB 15618-1995 土壤环境质量标准 [S].
|
[11] |
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.
|
[12] |
王美丽,李 军,岳甫均,等.天津盐渍化农田土壤盐分变化特征 [J]. 生态学杂志, 2011,30(9):1949-1954.
|
[13] |
GB 17136-1997 土壤质量总汞的测定冷原子吸收分光光度法 [S].
|
[14] |
Sladek C, Gustin M S. Evaluation of sequential and selective extraction methods for determination of mercury speciation and mobility in mine waste [J]. Applied geochemistry, 2003,18(4): 567-576.
|
[15] |
Begley I S, Sharp B L. Characterisation and correction of instrumental bias in inductively coupled plasma quadrupole mass spectrometry for accurate measurement of lead isotope ratios [J]. Journal of Analytical Atomic Spectrometry, 1997,12(4):395-402.
|
[16] |
Huang Z, Chen T, Yu J, et al. Labile Cd and Pb in vegetable-growing soils estimated with isotope dilution and chemical extractants [J]. Geoderma, 2011,160(3):400-407.
|
[17] |
Rodríguez-González P, Marchante-Gayón J M, García Alonso J I, et al. Isotope dilution analysis for elemental speciation: a tutorial review [J]. Spectrochimica Acta Part B: Atomic Spectroscopy, 2005,60(2):151-207.
|
[18] |
Amanda Jo Z, David C. Heavy Metal and Trace Metal Analysis in Soil by Sequential Extraction: A Review of Procedures [J]. International Journal of Analytical Chemistry, 2010,2010:1-7.
|
[19] |
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.
|
[20] |
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.
|
[21] |
Rahman G M, Hm‘Skip'kingston. Application of speciated isotope dilution mass spectrometry to evaluate extraction methods for determining mercury speciation in soils and sediments [J]. Analytical chemistry, 2004,76(13):3548-3555.
|
[22] |
Lodenius M, Seppänen A, Autio S. Sorption of mercury in soils with different humus content [J]. Bulletin of environmental contamination and toxicology, 1987,39(4):593-600.
|
[23] |
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.
|
[24] |
Peng L, Li Y C, Chan Z, et al. Effects of salinity and humic acid on the sorption of Hg on Fe and Mn hydroxides [J]. Journal of Hazardous Materials, 2013,245(2):322-328.
|
[25] |
Yin Y, Allen H E, Huang C P, et al. Kinetics of mercury (II) adsorption and desorption on soil [J]. Environmental Science & Technology, 1997,31(2):496-503.
|
[26] |
Yang Y K, Cheng Z, Shi X J, et al. Effect of organic matter and pH on mercury release from soils [J]. Journal of Environmental Sciences-China, 2007,19(11):1349-1354.
|
[27] |
Liao L, Selim H M, Delaune R D. Mercury adsorption-desorption and transport in soils [J]. Journal of Environmental Quality, 2009,38(4):1608-1616.
|
[28] |
Kim C S, Rytuba J J, Brown G E. EXAFS study of mercury (II) sorption to Fe-and Al-(hydr)oxides: II. Effects of chloride and sulfate [J]. Journal of Colloid and Interface Science, 2004,270(1):9-20.
|
[29] |
梁佩玉,陈丽君,董 祯,等.土壤中无机钠盐对不同形态铅离子浓度的影响 [J]. 南开大学学报(自然科学版), 2011,44(12):88-92.
|
[30] |
刘 平,徐明岗,宋正国.伴随阴离子对土壤中铅和镉吸附-解吸的影响 [J]. 农业环境科学学报, 2007,26(1):252-256.
|
[31] |
Karimian N, Kalbasi M, Zee S V D. Cadmium and zinc in saline soil solutions and their concentrations in wheat [J]. Soil Science Society of America Journal, 2006,70(2006):582-589.
|
[32] |
Weggler-Beaton K, Mclaughlin M J, Graham R D. Salinity increases cadmium uptake by wheat and Swiss chard from soil amended with biosolids [J]. Soil Research, 2000,38(1):37-45.
|
[33] |
Mclaughlin M J, Lambrechts R M, Smolders E, et al. Effects of sulfate on cadmium uptake by Swiss chard: II. Effects due to sulfate addition to soil [J]. Plant & Soil, 1998,202(2):217-222.
|
[34] |
丁能飞,周吉庆,龟和田国彦,等.不同种类与浓度的阴离子对菠菜镉吸收的影响 [J]. 植物营养与肥料学报, 2008,14(6):1137-1141.
|
[35] |
王祖伟,弋良朋,高文燕,等.碱性土壤盐化过程中阴离子对土壤中镉有效态和植物吸收镉的影响 [J]. 生态学报, 2012,32(23): 7512-7518.
|
|
|
|