水体中六价铬生物吸附与解吸附条件与特性

The conditions and features for biosorption and desorption Cr(VI)in water body

以毛霉(MucorLH3)菌体作为吸附剂,对水体中的Cr(VI)进行生物吸附与解吸附研究,对吸附实验条件进行了优化.实验结果表明,酸性环境条件(pH1)以及温度28℃有利于Cr(VI)的生物吸附,在8 h内Cr(VI)的生物吸附去除效率达99%.对5种解吸附剂进行解吸附对比,0.1 mol/LNaOH溶液解吸附效果最好,解吸附率达到98.6%,为最优解吸附剂.5次吸附-解吸附循环实验表明:毛霉最作为吸附剂对Cr(VI)的吸附效果比较理想,通过解吸附可以很好地做到重复利用吸附剂.

The Mycelium of Mucor LH3 was taken as sorbent to reseach the biosorption and desorption of Cr（VI）.Moreover,the experimental conditions of biosorption were optimized.The results showed that the acidic environmental conditions（pH 1）and 28℃are conducive to the biosorption of Cr（VI）.The removal efficiency of Cr（VI）is approximate 99% within 8 hours.The solution of 0.1 mol/L NaOH is selected to be the best elution by compared with 5 kinds of elutions after the experiments of desorption.The desorption efficiency of Cr（VI）is 98.6%.The adsorption-desorption experiments after 5 repeated cycles displaye that the effect of adsorption Cr（VI）with Mucor is ideal,because the adsorbent is well reused by desorption.