真菌曲霉F77对水中Cs~＋的吸附

微生物在环境放射性污染修复中具有广泛的应用前景。从放射性污染土壤中筛选出一株耐辐射真菌曲霉F77,研究了它对水中Cs＋的吸附及其影响因素。结果表明：酸对Cs＋在曲霉F77上的吸附存在竞争作用,pH=2.0~3.5溶液中的Cs＋几乎不被曲霉F77吸附;曲霉F77生长过程中代谢产生大量的酸性物质;Cs＋的吸附随着曲霉F77培养时间的增长而增大,在曲霉F77逐渐衰亡时吸附降低;K＋质量浓度小于500mg/L时对Cs＋在曲霉F77上的吸附没有影响,当K＋质量浓度大于500mg/L时Cs＋的吸附随K＋浓度增大而减少;溶液中Cs＋质量浓度为0~500mg/L范围内,曲霉F77对Cs＋均有较高的吸附,Cs＋...

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Published in核化学与放射化学 Vol. 36; no. 6; pp. 346 - 351
Main Author 王卫宪 王耀芹 张瑞荣 徐辉 王玮 吴王锁
Format Journal Article
LanguageChinese
Published 兰州大学 放射化学研究所，甘肃 兰州 730000 2014
西北核技术研究所，陕西 西安 710024%西北核技术研究所,陕西 西安,710024%新疆农业科学院 微生物应用研究所,新疆 乌鲁木齐,830091%兰州大学 放射化学研究所,甘肃 兰州,730000
Subjects
Cs
吸附
微生物
曲霉F77
生物修复
Cs
曲霉 F7 7
Aspergillus F77 strain
吸附
biological remediation
生物修复
microorgan-isms
微生物
biosorption
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ISSN0253-9950
DOI10.7538/hhx.2014.36.06.0346

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Summary:微生物在环境放射性污染修复中具有广泛的应用前景。从放射性污染土壤中筛选出一株耐辐射真菌曲霉F77,研究了它对水中Cs＋的吸附及其影响因素。结果表明：酸对Cs＋在曲霉F77上的吸附存在竞争作用,pH=2.0~3.5溶液中的Cs＋几乎不被曲霉F77吸附;曲霉F77生长过程中代谢产生大量的酸性物质;Cs＋的吸附随着曲霉F77培养时间的增长而增大,在曲霉F77逐渐衰亡时吸附降低;K＋质量浓度小于500mg/L时对Cs＋在曲霉F77上的吸附没有影响,当K＋质量浓度大于500mg/L时Cs＋的吸附随K＋浓度增大而减少;溶液中Cs＋质量浓度为0~500mg/L范围内,曲霉F77对Cs＋均有较高的吸附,Cs＋质量浓度为500mg/L时,Cs＋的吸附量为27.6mg/g。温度影响曲霉F77对Cs＋吸附的快慢,不影响最后的吸附量;曲霉F77对Cs＋具有较好的吸附性能,表明曲霉F77具有吸附剂的潜质。
Bibliography:11-2045/TL
WANG Wei-xian, WANG Yao-qin, ZHANG Rui-rong, XU Hui, WANG Wei, WU Wang-suo 1. Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China; 2. Northwest Institute of Nuclear Technology, Xi＇ an 710024, China ; 3. Insitute of Microbiology Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China
Microorganisms, ever applied to remediation of heavy metal polluted soils, seems to be a prospective approach in radioactive contamination remediation. In our work, Asper- gillus F77 was separated from high-level radioactivity soils and used to remove Cs＋ from aqueous solutions. Effects of pH values, initial concentration of Cs＋ , concentration of kali- um on the biosorption of Cs＋ by Aspergillus F77, as well as the kinetics and thermodynamics, were investigated through batch progress. The results indicate that acids, including organic acids generated in the metabolism of Aspergillus F77, inhibite the growth of the aspergillus intensively. The effective bi
ISSN:0253-9950
DOI:10.7538/hhx.2014.36.06.0346