摘要
通过菌种培养、分离与筛选 ,获得一株对铬具有很强还原与吸附性能的掷孢酵母(Sporobolomycetaceaesp ) .该菌株适宜的吸附pH值是 6— 9,1g培养 60h的菌体在 2 0mlpH 7的 1 5mg·l- 1 铬液中 ,吸附 8h后 ,对铬的去除率最高达到 1 0 0 % .在浓度分别为 1 5 ,30 ,5 0 ,1 0 0 ,30 0mg·l- 1 的铬液中 ,每克菌体对铬的吸附量与对数曲线y=1 72 5 8ln(x) - 2 0 9 49相吻合 ,相关系数为 0 9889,对吸附后菌体破壁测得细胞质内含铬量最高 ,达 65 5 % .通过扫描电子显微镜发现 ,处理 1 5mg·l- 1 铬液 8h后 。
A strain of Sporobolomycetaceae sp.was obtained by cultivation and separation from some plating plants.Its capability of the detoxification and adsorption was notable in pH 6-9.The ration of removal was 100% after adsorbing 20ml 15 mg·l -1chromium for 8 hours with 1 gram of 60-hour - cultivated cell in pH7.The curve of adsorbing capacity in different chromium correlation concentration(15,30,50,100 and 300mg·l -1)was accorded with the y=172 58 ln(x)-209 49 equation,and the coefficient was 0 9889.It was found that after adsorption the chromium content in cytoplasm was larger than that in cell wall by breaking cell,the intracellular chromium was 65 5%.Any damage in the cell wall was not observed by using scanning electronic microscope to the samples of the strain that had been treated with 15mg·l -1 chromium for 8 hours.
出处
《环境化学》
CAS
CSCD
北大核心
2003年第5期469-473,共5页
Environmental Chemistry
基金
国家自然科学基金 (5 0 2 780 40 )
广东省自然科学基金 (980 897)资助项目
