A three-dimensional model of predicting arsenic in water and sediment was constructed to scientifically evaluate the influence of arsenic on Zongtongka Reservoir after reservoir formation. The adsorption equilibrium of sediment on arsenic after reservoir impoundment was analyzed through isothermal adsorption test. The Guoduo Reservoir which is of similar hydrological and water quality conditions with Zongtongka Reservoir verified the model parameters and simulated the three-dimensional distribution of arsenic in different water periods after the Zongtongka Reservoir was impounded. Results revealed that after water storage, the sediment concentration and arsenic concentration of the reservoir both declined along the stream. Sediment concentration in wet season is larger than that in dry season, and sediment concentration in front of the dam in the surface is obviously smaller than that in the bottom; while arsenic concentration in wet season is smaller than that in dry season, and when the arsenic concentration in tributary is large, shore pollution zone will be formed. Arsenic concentration in front of the dam shows a significant increase from the surface layer to the bottom layer.
Key words
arsenic /
partition coefficient /
isothermal adsorption experiment /
temporal and spatial distribution /
Zongtongka Reservoir
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References
[1] LOSKA K, WIECHULA D. Application of Principal Component Analysis for the Estimation of Source Heavy Metal Contamination in Surface Sediments from Rybnik Reservoir[J]. Chemosphere, 2003, 51(8): 723-733.
[2] LOHANI M B, SINGH A, RUPAINWAR D C. Seasonal Variations of Heavy Metal Contamination in River Gomti of Lucknow City Region[J]. Environmental Monitoring and Assessment, 2009, 147(1): 253-263.
[3] MUHAMMAD S, SHAH M T, KHAN S. Health Risk Assessment of Heavy Metals and Their Source Apportionment in Drinking Water of Kohistan Region, Northern Pakistan[J]. Microchemical Journal, 2011, 98(2): 334-343.
[4] 傅献彩,沈文霞,姚天扬.物理化学[M].4版. 北京:高等教育出版社,1993:885-978.
[5] 高广生,陈静生.我国主要河流悬浮物样品对镉离子的吸附作用[J].环境化学,1983(4):28-39.
[6] 金相灿,王桂林.环境科学情报[M]. 武汉:武汉水利水电出版社, 1986: 28.
[7] 王晓蓉,章慧珠,周爱和,等.金沙江颗粒物对金属的吸附[J].环境化学,1983(1):23-32.
[8] 罗先香,田 静,杨建强,等.黄河口潮间带表层沉积物重金属和营养元素的分布特征[J].生态环境学报, 2011,20(5): 892-897.
[9] VAROL M, SEN B. Assessment of Nutrient and Heavy Metal Contamination in Surface Water and Sediments of the Upper Tigris River, Turkey[J]. Catena, 2012, 92: 1-10.
[10] CHIOU C T, PETERS L J, FRIED V H. A Physical Concept of Soil-Water Equilibria for Nonionic Organic Compounds[J]. Science, 1979, 206: 831-832.
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