摘要
通过电感耦合等离子体发射光谱(ICP-OES)、扫描电镜等手段研究了黄孢原毛平革菌210对镧离子(La3+)及其他稀土离子的吸附能力。结果表明,在pH=7,La3+浓度为40 mg.L-1,菌体投加量60 mg.L-1(以干重计),吸附时间120 min时,黄孢原毛平革菌210的吸附量最大,达141.5±4.72 mg.g-1。经盐酸预处理的菌体吸附能力有所提高,其他预处理则使菌体吸附能力下降。解吸剂柠檬酸和EDTA都能较好地解吸La3+。黄孢原毛平革菌210对单一稀土离子的吸附能力差异较大。在15种混合稀土离子溶液中,对Lu3+,Sm3+,Eu3+的吸附量较高,对混合稀土离子具有一定的富集、分离作用。扫描电镜发现La3+可能主要以盐的形式沉积在菌体表面上。
The adsorption capacity of phanerochaete chrysosporium 210 to La3＋ and the others rare earth ions were investigated by scanning electron microscope（SEM） and ICP-OES techniques.The results showed that the optimal adsorption condition was as follows： pH 7,La3＋ concentration 40 mg·L-1,inoculated volume 60 mg·L-1 and absorption for 120 min.La3＋ was adsorbed more strongly on phanerochaete chrysosporium 210 surfaces when pretreated with HCl and the adsorption could be decreased when pretreated with other chemicals.The La3＋ could be better desorbed by citric acid and EDTA.The selective adsorption experiment of mixed REIs showed that phanerochaete chrysosporium 210 preferentially adsorbed Lu3＋,Sm3＋ and Eu3＋,so phanerochaete chrysosporium 210 could be used to accumulate and separate REI.The La3＋ could be adsorbed on phanerochaete chrysosporium 210 surfaces according to result of scanning electron microscopy.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2010年第2期225-231,共7页
Journal of the Chinese Society of Rare Earths
基金
河南省重大公益性科研项目(072102190002)资助
