Experimental simulation and dynamic model analysis of Cadmium(Cd)release in soil affected by rainfall leaching in a coal-mining area
作者机构：College of Environment and Civil EngineeringChengdu University of TechnologyChengdu 610059China State Key Laboratory of Geohazard Prevention and Geoenvironment ProtectionChengdu 610059China
出 版 物：《Journal of Groundwater Science and Engineering》 (地下水科学与工程（英文版）)
年 卷 期：2021年第9卷第1期
页 面：65-72页
学科分类：12[管理学] 1204[管理学-公共管理] 082803[工学-农业生物环境与能源工程] 08[工学] 0828[工学-农业工程] 120405[管理学-土地资源管理]
基 金：This work was supported by the Major Scienceand Technology Projects (No. 80303-AZP005) Key R & D Project (No. 2018SZ0290) AppliedBasic Research Project (No. 2018JY0425) of theScience and Technology Planning Project of SichuanProvince, China
主 题：Rainfall pH value Soil Cd Dynamic equation
摘 要：In order to explore the influence of rainfall on the release of heavy metal Cadmium(Cd)in soil in a coal-mining area,soil column leaching experiments were carried out by simulating 3 types of rainfall(acid rain,normal rainfall,and actual rainfall)with 5 different pH values(4,5,6,6.7,7),and 65 groups of data about leachate pH value and Cd concentration were obtained *** results indicate the general change rule of Cd concentration in leachate:(1)the easiness of Cd release is negatively correlated to the pH value of leaching solution and positively correlated the leaching amount;(2)leaching solution with lower pH values shows more obvious release *** by solution with different pH values,the release of Cd in soil ranks as follows:Acid rain groupnormal rainfall groupactual rainfall *** the first stage,the acidity of rainfall has a significant impact on the release of Cd in soil,but in the second stage,the release of Cd is alleviated due to the soil *** the four dynamic equations to simulate the release of Cd in soil,the modified Elovich equation can describe the process most accurately,with the highest coefficient of determination R2 of *** results can serve as a reference for further study on the migration,transformation and enrichment of Cd in soil.
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