发酵废渣黑根霉菌对铅离子吸附机理的研究  

MECHANISM STUDY OF LEAD BIOSORPTION BY RHIZOPUS NIGRICANS

作　　者：张利[1] 孔德领[1] 屠娟[1] 赵力 俞耀庭[1] 

机构地区：[1]南开大学分子生物学研究所

出　　处：《离子交换与吸附》1996年第4期317-323,共7页Ion Exchange and Adsorption

基　　金：天津市青年科学基金

摘　　要：发酵工业废渣黑根霉菌对Ｐｂ２＋有很好的吸附作用，饱和吸附量可达８８ｍｇ／ｇ。本文通过电子显微镜观察，能谱测定以及红外光谱测定等分析手段，研究了这种生物吸附剂对Ｐｂ２＋的吸附机理。碱处理前后黑根霉的结构及吸附量变化揭示了吸附作用点的位置。动力学研究表明，在ｐＨ４．２时，黑根霉对Ｐｂ２＋的吸附是一快速吸附过程，Ｈ＋、Ｆｅ３＋和Ｚｎ２＋对吸附有干扰，说明存在竞争吸附。Nonliving Rhizopus nigricans exhibits lead uptake capacity from aqueous solutions up to 88mg/g. The mechanism of lead sequestering by this type of biomasswas studied by using experimental techniques such as electron microscopy, X--rayenergy dispersion analysis and iR spectroscopy. Comparison of the uptake betweenNaOH--treated and untreated biomass shows that the adsorption takes place in thecell wall chitin structure. The kinetic study of lead biosorption revealed a very rapidrate of uptake at PH 4. 2. Interference of Fi3 + and Zn2+ colons with lead biosorption is indicated.

关 键 词：黑根霉菌 铅 吸附 发酵工业 废渣 生物吸附剂 废水处理 生物吸附法 吸附机理 

分 类 号：X703.1[环境科学与工程—环境工程] O647.3[理学—物理化学]