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《Journal of Anhui Agricultural Sciences》 2010-33
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Study on the Adsorption and Desorption Characters of Tetrabrombisphinol A in Sediments in Chao Lake

YANG Su-wen et al(School of Environment,Beijing Normal University,Beijing 100875)  
[Objective] The aim was to find out the adsorption and desorption characters of Tetrabrombisphinol A(TBBPA) on solid-liquid surface.[Method] The sediments was collected from surface layer of 0~12 cm in Chao Lake,after the crushed stone and plant residue were eliminated,the surface sediments sample,humic acid-supplemented sediments sample and mineral sediments sample were prepared resp.for studying the adsorption and desorption of different samples to 0.1,0.5,1.0,2.0,5.0 and 10.0 mg/L TBBPA.[Result] The adsorption isotherm of TBBPA could be fitted very well with Freundlich and Lanngmuir models.The adsorption capacity of surface sediments to TBBPA was highest and the second was humic acid group with 10% organic matter.In the samples of each group,TBBPA levelly lied on sediments in monomolecular type,but could not insert into the crystal lattice of mineral.In the range of 0.1-1.0 mg/L,the ratios of physico-extraction adsorption to apparent adsorption quantity on TBBPA of surface sediments sample,humic acid-supplemented sediments sample and mineral sediments sample were 0.85,1.61 and 1.06 resp.,but in the range of 2.0-10.0 mg/L,these ratios were 0.40,0.47 and 0.34 resp.[Conclusion] The main adsorption of sediments in Chao Lake to TBBPA at low concn.was chemical adsorption and that of sediments in Chao Lake to TBBPA at high concn.was physical adsorption
【Fund】: 中国环境科学研究院基金项目(2008KYYW07);; 国家“973”项目(2008CB418206);; 国家环保部公益项目(HBGY200709022)
【CateGory Index】: X524
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