Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China.
Carbohydr Polym. 2013 Sep 12;97(2):496-501. doi: 10.1016/j.carbpol.2013.04.047. Epub 2013 May 9.
A novel biodegradable β-cyclodextrin-based gel (CAM) was prepared and applied to the removal of Cd(2+), Pb(2+) and Cu(2+) ions from aqueous solutions. CAM hydrogel has a typical three-dimensional network structure, and showed excellent capability for the removal of heavy metal ions. The effect of different experimental parameters, such as initial pH, adsorbent dosage and initial metal ion concentration, were investigated. The adsorption isotherm data fitted well to the Freundlich model. The adsorption capacity was in the order Pb(2+)>Cu(2+)>Cd(2+) under the same experimental conditions. The maximum adsorption capacities for the metal ions in terms of mg/g of dry gel were 210.6 for Pb(2+), 116.41 for Cu(2+), and 98.88 for Cd(2+). The biodegradation efficiency of the resin reached 79.4% for Gloeophyllum trabeum. The high adsorption capacity and kinetics results indicate that CAM can be used as an alternative adsorbent to remove heavy metals from aqueous solution.
一种新型可生物降解的β-环糊精基水凝胶（CAM）被制备出来，并应用于从水溶液中去除 Cd(2+)、Pb(2+)和 Cu(2+)离子。CAM 水凝胶具有典型的三维网络结构，对重金属离子具有优异的去除能力。考察了不同实验参数，如初始 pH 值、吸附剂用量和初始金属离子浓度的影响。吸附等温线数据很好地符合 Freundlich 模型。在相同的实验条件下，吸附容量的顺序为 Pb(2+)>Cu(2+)>Cd(2+)。以干凝胶毫克/克计，对金属离子的最大吸附容量分别为 210.6mg/g 的 Pb(2+)、116.41mg/g 的 Cu(2+)和 98.88mg/g 的 Cd(2+)。对 Gloeophyllum trabeum 的生物降解效率达到了 79.4%。高吸附容量和动力学结果表明，CAM 可以作为一种替代吸附剂，从水溶液中去除重金属。
