摘要
Using soybean hull residue after the soluble dietary fiber being removed during the soybean processing industry as crude material,a novel absorbent,modified soybean hulls,is prepared.Its adsorption behavior for Pb2＋ is studied.The adsorbent has a large and efficient adsorption capacity for Pb2＋,up to 20% of the mass of dry ad-sorbent.Its maximum adsorption capacity for Pb2＋ reaches 217 mg·g-1 at initial Pb2＋ concentration of 2000 mg·L-1,which is twice that of yeast absorbent and threefold greater than that of chitosan absorbent.The adsorption ability is sensitive to pH value in the solution and the optimal pH for adsorption of Pb2＋ is 7.0.In the presence of other metal ions （Ca2＋,Mg2＋ and Na＋） in the solution,their effect on the adsorption capacity for Pb2＋ is not obvious.After 5 cy-cles of adsorption,80% adsorption capacity of Pb2＋ is maintained.Compared with various available commercial resins,the modified soybean hulls are a plentiful,inexpensive and effective medium for the capture of dissolved Pb2＋ from waste streams.
在可溶的饮食的纤维以后使用大豆壳残余在作为粗略的材料处理工业的大豆期间正在被移开，新奇吸收剂，修改大豆壳，被准备。它为 Pb2+ 的吸附行为被学习。吸附物为 Pb2+ 有一个大、有效的吸附能力，直到干燥吸附物的 20% 质量。它为 Pb2+ 的最大的吸附能力到达 217 mg 汣獯摥氭潯 ? 潣瑮潲 ? 祳瑳浥 ? 獩愠祳灭潴楴慣汬? 瑳 'L 敬愠摮琠敨 ? 椭普湩瑩 ? 潮浲漠 ? 桴 ?牴湡晳牥映湵瑣潩?牦浯琠敨搠獩畴'R湡散琠?桴?畯灴瑵漠??潣瑮潲汬摥猠獹整?獩氠獥?桴湡愠朠癩湥挠湯瑳湡?潴愠瑴湥慵整搠獩畴'R湡散吗？
基金
Supported by the National Natural Science Foundation of China（20876008 21076009）
the National Basic Research Program of China（2007CB714305）
the National High Technology Research and Development Program of China（2006AA020101）
Chinese Universities Scientific Fund（ZZ1024）
