文档介绍：ics and mechanisms of copper sorption by
loosely bound extracellular polymeric substances
(LB-EPS) from activated sludge under simulating
bio-calcification conditions
LI Juan LONG Jian, KANG Fuxing
Institute of Land Reclamation and Ecological Reconstruction Key Laboratory for Information System of Mountainous
China University of Mining and Technology Areas and Protection of Ecological Environment of Guizhou
Beijing, China Guizhou Normal University
e-mail:lijuan_113@ Guiyang, China
e-mail:longjian22@
Abstract—The behavior and fate of copper binding with from the water column. Moreover, these EPS biopolymers may
extracellular polymeric substances (EPS) from activated sludge, even protect biological life forms, especially anisms,
under simulating bio-calcification, was studied. Results showed from environmental hazards[4]. Therefore, as part of the
that the degree of EPS sequestering with calcium had a strong natural water cleaning cycle, enhanced production of EPS will
2+
differential affect on copper sorption. At lower Ca in turn improve the removal efficiency of soluble metals [2].
concentrations (≤80 mg·l-1), the Langmuir equation was able to
model adsorptive processes between Cu2+ and EPS, which According to previous studies, acidic harides
petitive adsorption between free Cu2+ and Ca2+ ions. containing uronic acid secrete