摘要
将粗毛栓菌菌丝球与蜡状芽孢杆菌共固定为共固定菌.以粗毛栓菌菌丝球、蜡状芽孢杆菌和共固定菌为研究对象,测定不同吸附时间、初始pH、吸附剂浓度和Pb2+浓度对3种生物吸附剂吸附Pb2+的影响,并将3种生物吸附剂吸附Pb2+前后的红外吸收光谱进行分析比较.结果表明:在吸附剂浓度为2g.L-1、pH为5.0、Pb2+浓度为50mg.L-1条件下对Pb2+吸附1h效果良好,其吸附率分别为71.7%、91.0%和96.9%.生物吸附剂红外光谱主要由蛋白质、碳水化合物和含硫、磷酸基团的吸收带组成,表明对Pb2+吸附起主要作用的官能团是羟基、羧基、磷酸基和含硫基团.
Taking Trametes gallica mycelium pellets,Bacillus cereus,and their co-immobilized biomaterial as bio-adsorbents,this paper studied their Pb2＋ adsorption under effects of different contact time,medium initial pH value and Pb2＋ concentration,and bio-adsorbent concentration,and compared the infrared spectra of the bio-adsorbents before and after Pb2＋ absorption.The Pb2＋ adsorption efficiency of the bio-adsorbents was the highest when the bio-adsorbent concentration was 2 g·L-1,initial pH was 5.0,initial Pb2＋ concentration was 50 mg·L-1,and contact time was 1 h,with the Pb2＋ biosorption rate being 71.7% for the mycelium pellets of T.gallica,91.0% for B.cereus,and 96.9% for the co-immobilized biomaterial.The infrared spectra of the bio-adsorbents were mainly consisted of the absorption zones of protein,carbohydrates,and sulphur-and phosphors-based groups,suggesting that hydroxyl,carboxyl,and sulphur-and phosphate-based groups played important roles in the Pb2＋ adsorption by the bio-adsorbents.
出处
《应用生态学报》
CAS
CSCD
北大核心
2012年第8期2212-2218,共7页
Chinese Journal of Applied Ecology
基金
四川省教育厅重点科研项目(08ZA053)
四川农业大学科技创新基金项目(00731200)资助
关键词
粗毛栓菌
蜡状芽孢杆菌
共固定生物吸附剂
铅
红外光谱
Trametes gallica
Bacillus cereus
co-immobilized bio-adsorbent
lead
infrared spectrum
