南水北调与水利科技Issue(2)：294-297,394,5.DOI:10.13476/j.cnki.nsbdqk.2015.02.022
CPAM对疏浚淤泥中镉解吸行为的影响
Effects of CPAM on adsorption and desorption characteristics of Cd in dredged sludge
方申柱 1浩婷 2田宇 2吴燕2
作者信息
- 1. 安徽省交通航务工程有限公司，合肥 230011
- 2. 天津科技大学 材料科学与化学工程学院，天津 300457
- 折叠
摘要
Abstract
TheeffectsandinfluencingmechanismofCPAMwithdifferentiondegrees,molecularweights,anddosagesonthead-sorption and desorption characteristics of Cd in dredged sludge were investigated. Results showed that when the initial concen-trationofCdindredgedsludgeis0.5μg/L,theCdconcentrationinthesupernatantfluidislessthan0.1μg/Lunderthenatu-ralsedimentationaftertheaddingofCPAM,whichissimilartothatwithouttheaddingofCPAM.However,underthecondition of vacuuMfiltration, the concentration of Cd in the filtrate can reach 0. 35μg/L, and about 64% of soluble Cd desorbs froMthe sludge particles into thefiltrate.The introduction of CPAMcan desorb the nonspecific adsorption Cd and some specific adsorp-tionCdinthesludgeparticlesintotheweakdoubleelectricwaterthroughtheionexchange.Afterthevacuumfiltration,thede-sorption rate of Cd cand reach more than 60%, instead of 1% without the adding of CPAM.关键词
疏浚淤泥/CPAM/镉/吸附与解吸Key words
dredged sludge/CPAM/Cd/adsorption and desorption分类
资源环境引用本文复制引用
方申柱,浩婷,田宇,吴燕..CPAM对疏浚淤泥中镉解吸行为的影响[J].南水北调与水利科技,2015,(2):294-297,394,5.
