海藻酸钠固定化纤维单胞菌对铜吸附性能研究

Copper adsorption efficiency of sodium alginateimmobilized Cellulomonas sp.

为得到最佳去除废水中铜离子的生物吸附剂,并探究其对废水中铜离子去除效能及作用机理,以海藻酸钠包埋化纤维单胞菌制成固定化微球,通过对比游离态纤维单胞菌及固定化微球分别去除废水中的铜离子的效能,确定去除废水中铜离子最佳生物吸附剂。结果表明,游离态纤维单胞菌与固定化微球均具有良好的铜离子耐受能力,且固定化微球对铜离子耐受能力更强。相较于游离态纤维单胞菌,固定化微球适用pH范围更广,对铜的去除效能更高。在固定化微球处理铜的过程中,磷酸根和磷酸基团起到主要作用。

Immobilized microspheres were prepared by encapsulating Cellulomonas sp.alginate in sodium alginate.By comparing the removal efficiency of copper ions in wastewater by free Cellulomonas sp.and immobilized microspheres,the optimum biological adsorbent was determined.The results showed that both free Cellulomonas sp.and immobilized microspheres had good copper tolerance and the ability to treat copper-containing wastewater.The immobilized microspheres had a wider range of pH values and higher copper tolerance and removal efficiency than free Cellulomonas sp.The immobilized microspheres after copper removal may be due to the formation of particulate matter by the adsorption of copper ions on the surface of immobilized microspheres.Phosphate and phosphoric acid groups played a major role in the treatment of copper by immobilized microspheres.