title: [Adsorption characteristic and form distribution of silicate in lakes sediments].
abstract: Taking surface sediments from the Wuliangsuhai Lake and Daihai Lake as adsorbent, the isothermal adsorption experiments of silicate on sediments were carried out and the adsorption behavior was explained by Langmuir, Freundlich and Temkin crossover-type equations, then the form distribution characters of silicate were studied after adsorption in this work. The results showed that the adsorption behavior of silicate on the two lakes sediments can be linear fitting in the lower concentration dose (< or = 3.00 mg x L(-1)); the sediments from the Wuliangsuhai Lake behaved adsorbing silicate while the sediments from the Daihai Lake behaved releasing silicate under the experimental dose; all of the Langmuir, Freundlich and Temkin crossover-type equations can be used to explain the adsorption behavior of silicate on the two lakes sediments, and the native adsorption silicate (NAS) and equilibrium silicate concentration (ESC(0)) calculated by the three equations could be used to explain the sink and source effects of the sediments from the two lakes; the silicate form distribution in the sediments after adsorption indicated that silicate adsorbed on particles were mainly added on the form of IEF-Si, CF-Si, IMOF-Si and OSF-Si, and the IMOF-Si and OSF-Si had important potential bioavailability.
authors.affiliation: College of Environment and Resources, Inner Mongolia University, Huhhot 010021, China. lcw2008@imu.edu.cn
authors.forename: Chang-Wei
authors.initials: CW
authors.lastname: Lü
authors.forename: Meng
authors.initials: M
authors.lastname: Cui
authors.forename: Ji-Mei
authors.initials: JM
authors.lastname: Gao
authors.forename: Xi-Yan
authors.initials: XY
authors.lastname: Zhang
authors.forename: Li-Li
authors.initials: LL
authors.lastname: Wan
authors.forename: Jiang
authors.initials: J
authors.lastname: He
authors.forename: Ting-Ting
authors.initials: TT
authors.lastname: Meng
authors.forename: Fan
authors.initials: F
authors.lastname: Bai
authors.forename: Xu
authors.initials: X
authors.lastname: Yang
mesh_terms: D000327:Adsorption; D002681:China; D004784:Environmental Monitoring; D005068:Eutrophication; D005618:Fresh Water / Q000032:analysis*; D019015:Geologic Sediments / Q000737:chemistry*; D017640:Silicates / Q000032:analysis* / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D017640:Silicates; D014874:Water Pollutants, Chemical