河水中悬浮颗粒物对重金属的吸附行为  

Sorption Behaviors of Heavy Metals on Suspended Particulate Matter in River Water

作　　者：夏义雄 陈华林[2] 

机构地区：[1]温州市环境监测中心站,浙江温州325000 [2]温州大学生命与环境科学学院,浙江温州325035

出　　处：《亚热带资源与环境学报》2012年第4期82-86,共5页Journal of Subtropical Resources and Environment

基　　金：国家自然科学基金资助项目(40501065)

摘　　要：本研究以瓯江河水为对象,研究河水中悬浮颗粒物对重金属(Cu、Zn、Cd、Pb)离子的吸附行为.分别进行了Cu、Zn、Cd、Pb在悬浮颗粒物的吸附速率,解吸速率以及溶解性有机质(DOM)对吸附解吸行为的影响实验.结果表明:河水中悬浮颗粒物对Cu、Zn、Cd、Pb的吸附和解吸速率较快,吸附平衡时间为8 h,解吸平衡时间为4 h.在本实验条件下,悬浮颗粒物对Cu、Zn、Cd、Pb的最大吸附量分别为1.821 mg.g-1、3.363 mg.g-1、0.282 8mg.g-1、2.828 mg.g-1.外加DOM可以抑制悬浮颗粒物对金属离子的吸附,但对已经吸附在悬浮颗粒物上的金属离子,外加DOM却不能显著促进金属离子的解吸.The sorption behaviors of heavy metals （ Cu, Zn, Cd, Pb） on suspended particulate matter in river water were studied using the sorption rate and desorption rate experiments, and the effect of dissolved organic matter （DOM） on the sorption behaviors was examined. The results showed that the sorption and desorption of Cu, Zn, Cd and Pb on suspended particulate matter would reach equilibrium during a short period of time, with 8h sorption equilibrium time and 4h desorption equilibrium time. Under such experiment conditions the maximum sorption capacities of Cu, Zn, Cd and Pb on suspen- ded particulate matter could reach 1. 821 mg ·g-1, 3. 363 mg·g-1, 0. 282 8 mg·g-1 and 2. 828mg·g -1, respectively. The study has indicated that DOM could weaken the sorption of heavy metals onto suspended particulate matter, however, it couldn＇t significantly enhance the desorption amount of heavy metals absorbed onto suspended particulate matter.

关 键 词：悬浮颗粒物 重金属 吸附 解吸 溶解性有机质 

分 类 号：X132[环境科学与工程—环境科学]