摘要
为了探讨赣南离子型稀土矿区土壤吸附铜的机理,了解一般土壤(校园土、农田土)与矿区土壤(原矿土、尾矿土)中铜污染和生态环境的关系,实验研究了不同条件下4种土壤吸附铜的特征。采用批吸附试验方法,研究pH、腐殖酸、水土质量比、温度对4种土壤吸附铜的影响。结果表明,随着pH的增加,吸附量呈现先增加后下降的趋势,分别在pH=3和pH=5时取得最小值与最大值;校园土和农田土随着腐殖酸含量的增加,吸附量呈逐渐下降的趋势;原矿土和尾矿土在腐殖酸含量为5%时,吸附量达到最大,随后呈下降趋势;4种土壤对Cu(Ⅱ)的吸附率随着水土比的升高而降低,在水土比为20∶1和200∶1时,取得吸附率的最大值与最小值;4种土壤对Cu(Ⅱ)吸附量随着温度的升高而升高。
In order to investigate the adsorption mechanism of copper in Gannan ion-type rare earth mining soil and understand its relationship between copper pollution and ecological environment in the general soil(campus soil,farmland soil)and mining soil(raw ore and tailings soil),the adsorptions of copper in four soils were studied by experiment in different conditions.The effects of different pH,humic acid,soil-water ratio and temperature on the adsorption of copper in four soils were investigated though batch adsorption test methods.The results showed that the adsorption capacity increased first and then decreased with the increase of pH,and the minimum and maximum values were obtained at pH=3 and pH=5,respectively.The adsorption capacity of campus soils and farmland soils decreased gradually with the increase of humic acid content,the adsorption capacity of the raw ore and tailings soil in the humic acid content of 5%reached the maximum,then decreased.The adsorption rates of Cu(II)in the four soils decreased with the increase of soil-water ratio,and the maximum and minimum values of the adsorption rate were obtained when the soil-water ratio was 20∶1 and 200∶1.The adsorption capacity of Cu(II)increases with the increase of temperature.
作者
蔺亚青
胡方洁
张军
杨秀英
刘祖文
LIN Ya-qing;HU Fang-jie;ZHANG Jun;YANG Xiu-ying;LIU Zu-wen(School of Architecture and Surveying&Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;Resources and Environment Engineering Institute,Jiangxi University of Science and Technology,Ganzhou 341000,China)
出处
《应用化工》
CAS
CSCD
北大核心
2018年第3期434-437,442,共5页
Applied Chemical Industry
基金
国家自然科学基金(51464014)
关键词
离子型稀土矿区土壤
铜
pH
腐殖酸
水土比
温度
ion-type rare earth mine soil
copper
pH
humic acid
soil-water ratio
temperature
