黄河兰州段沉积物对萘和BHT的吸附解吸特性研究  

Sorption and Desorption Characteristics of Naphthalene and BHT on the Sediment from Lanzhou Part of Yellow River

作　　者：渠康 宋庆国 杨勋兰 刘昕宇 暴维英 

机构地区：[1]黄河流域水环境监管中心,河南郑州450004

出　　处：《农业环境科学学报》2007年第1期113-116,共4页Journal of Agro-Environment Science

基　　金：国家自然科学基金项目(50239060)

摘　　要：采用室内实验方法,研究了萘和叔丁基酚在黄河兰州段水体颗粒沉积物上的吸附解吸特性。结果表明,萘和叔丁基酚在黄河兰州段水体颗粒物上的吸附在8h内可以充分达到平衡。吸附过程表现出一定的非线性,吸附数据与Freundlich等温线能够较好地拟合。研究表明,萘和叔丁基酚的解吸过程存在着明显的迟滞现象,即已被吸附的有机物分子不能很快地、完全地解吸到水相,这也导致了极限残留量的存在。The sorption and desorption behavior of naphthalene and 2,6-di-tert-butyl-p-cresol （BHT） on sediment from the Yellow River Lanzhou part was studied. The sorption of naphthalene and BHT reached the dynamic balance adequately in 8 h. The sorption isotherm curve of naphthalene and BHT could be well described by Freundlich equation, well fitted with the experimental data of sorption and desorption. The sorption procedure of naphthalene and BHT took on somewhat nonlinear sorption. The balanced adsorb rates of BHT wasmore than that of naphthalene. The nonlinear relationship of sorption and balanced adsorb related to the physicochemical property of organic pollutant. There was an obvious hysteresis in the desorption experiment of naphthalene and BHT, which maybe contributed to following three factors： the irre- versible sorption taken place in some special points of the adsorbent, the tardy desorption procedure induced by the structure change of adsorbent when the organic pollutants were adsorbed onto the adsorbent and the organic pollutants captured by the adsorbent. The organic compounds adsorbed on the sediment can be desorbed to the aqueous absolutely. There were some＇ inherent relationships in the nonlinear sorption, tardy desorption, hysteresis and ultimate residual.

关 键 词：吸附解吸 滞后现象 萘 2 6-二叔丁基对甲酚 河流沉积物 

分 类 号：X123[环境科学与工程—环境科学]