低分子有机酸对土壤中镍的活化作用研究  

Study on the Activation of Low Molecular Weight Organic Acids on Soil Ni

作　　者：唐佳 王艳[2,3] 伏毅 黄敏[2,3] 瞿攀 官崎州[1] TANG Jia;WANG Yan;FU Yi(Sichuan Zhonghuanlianshu Environmental Consulting Service Co.,Ltd.,Chengdu,Sichuan 610101;Sichuan Institute of Atomic Energy,Chengdu,Sichuan 610101;Irradiation Preservation Key Laboratory of Sichuan Province,Chengdu,Sichuan 610101)

机构地区：[1]四川中环联蜀环境咨询服务有限公司,四川成都610101 [2]四川省原子能研究院,四川成都610101 [3]辐照保藏四川省重点实验室,四川成都610101

出　　处：《安徽农业科学》2021年第5期87-89,共3页Journal of Anhui Agricultural Sciences

摘　　要：通过低分子有机酸对土壤的浸提和淋溶,研究草酸、酒石酸、柠檬酸对镍的活化作用以及对土壤pH的影响。结果表明,低浓度有机酸能显著降低土壤pH,降低幅度随有机酸浓度的升高而增加,其中柠檬酸对土壤pH的影响最大,20 mmol/kg的添加量使土壤pH从8.77降低至6.93;不同的有机酸对镍的活化能力相差较大,但均随有机酸浓度的增加而增强,5~20 mmol/L草酸和酒石酸对镍的活化能力较弱,活化率不到0.70%,而柠檬酸对镍的活化能力较强,其中20 mmol/L的柠檬酸对镍的活化率达7.30%;有机酸的淋溶降低了土壤pH,柠檬酸降低幅度最大,其次为酒石酸和草酸;不同有机酸对镍的溶出有所不同,其中草酸和酒石酸对镍的溶出率较低,而柠檬酸溶出率达6.25%。The activation of oxalic acid,tartaric acid and citric acid on nickel and the effect on soil pH were studied by extraction and leaching of low molecular weight organic acids to soil.The results showed that the low concentration of organic acids could significantly reduce soil pH.And the decreasing extent increased with the increase of organic acid concentration.Among them,citric acid had the greatest influence on soil pH,the addition of 20 mmol/kg reduced the soil pH from 8.77 to 6.93.The activation ability of different organic acids to nickel was different,but it was enhanced with the increase of organic acid concentration.The activation ability of 5-20 mmol/L oxalic acid and tartaric acid to nickel was weak,and the activation rate was less than 0.70%.However,citric acid had stronger activation ability to nickel,and the activation rate of citric acid with 20 mmol/L to Ni was 7.30%.Leaching of organic acids decreased soil pH,the order of reduce the magnitude was citric acid>tartaric acid>oxalic acid.Different organic acids on nickel dissolution was different,among which oxalic acid and tartaric acid had lower dissolution rate,while the dissolution rate of citric acid reached 6.25%.

关 键 词：镍 土壤 低分子有机酸 活化作用 

分 类 号：X53[环境科学与工程—环境工程]