盐碱化土壤对铅的吸附特性  

Adsorption of lead by saline-sodic soil

作　　者：杨艳琴 王莉霞[3] 张宏忠[1,2] 赵继红[1,2] 

机构地区：[1]环境污染治理与生态修复河南省协同创新中心,河南郑州450002 [2]郑州轻工业学院材料与化学工程学院,河南郑州450002 [3]中国科学院东北地理与农业生态研究所,吉林长春130012

出　　处：《江苏农业学报》2015年第5期1031-1036,共6页Jiangsu Journal of Agricultural Sciences

基　　金：国家水体污染控制与治理科技重大专项子课题(2012ZX07204-001);河南省重大公益招标项目(101100910300)

摘　　要：为进一步明确盐碱土对重金属的吸附累积规律,本研究以盐碱化土壤为研究对象,探讨不同盐碱化程度土壤对重金属铅的吸附行为,以及施用水稻秸秆、堆肥后盐碱化土壤对铅的吸附特征变化。结果表明:施用水稻秸秆、堆肥前后的盐碱化土壤样品,对铅的等温吸附曲线更符合Freundlich方程,且决定系数均大于0.9;盐碱化土壤对铅有较强的吸附能力,其强弱顺序为:轻度盐碱化土壤>重度盐碱化土壤>中度盐碱化土壤;在盐碱化土壤中施用一定量水稻秸秆能促进其对铅的吸附,而施用一定量污泥堆肥能抑制盐碱化土壤对铅的吸附。The adsorption of lead in the different saline-sodic soils ( SSS ) and its changes caused by adding rice straw or compost were studied. The results showed that the adsorption isotherms of lead in saline-sodic soil before and after the addition of rice straw or compost fitted well with the Freundlich equation with correlation coefficients above 0. 9. The strongest adorsorption of lead was found in mild saline-sodic soil and the weakest, in moderate saline-sodic soil. Rice straw addition in the SSS samples increased the adsorption of lead, whereas compost addition brought the contrary results.

关 键 词：盐碱化土壤 铅 吸附特性 稻秆 堆肥 

分 类 号：S156.4[农业科学—土壤学]