两种褐藻对水溶液中Zn^(2+)的吸附研究  

Study on the Biosorption of Zn^(2+) by Two Brown Algae

作　　者：周洪英[1] 贾海红[1] 李娜[1] 

机构地区：[1]淮海工学院化学工程学院,江苏连云港222005

出　　处：《食品研究与开发》2012年第1期150-154,共5页Food Research and Development

基　　金：江苏省高校自然科学基础研究基金(07KJB610005)

摘　　要：利用海带(Laminaria japonica)、裙带菜(Undaria pinnatifida)作为生物吸附剂,研究其对废水中Zn2+的吸附行为。结果表明:pH是影响生物吸附最重要的因素,两种海藻吸附Zn2+的最佳pH范围为4～7。动力学数据符合准二级动力学模型。Langmuir等温线模型能够成功地拟合平衡数据。红外光谱分析显示,羧基在生物吸附过程中发挥主要作用。人体消化道中的胃蛋白酶会抑制食物对锌的吸附。Two brown algae Laminariajaponica and Undaria pinnatifida were used as biosorbents for their ability to remove Zn^2＋ from aqueous solutions. Results showed that the biosorption were significantly affected by initial solution pH. The optimal pH of biosorption was 4-7. Kinetics experiments results could be accurately described by pseudo-second order rate equation. The Langmuir isotherm models fitted the experimental data very well. The FrlR data showed that the carboxyl play a major role in biosorption process. Results showed that the pepsin in the digestive tract can restrain the biosorption.

关 键 词：海藻 Zn2+ 生物吸附 平衡 动力学 

分 类 号：X173[环境科学与工程—环境科学]