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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 lanthanum ions (La3 +) and other rare earth ions was investigated by inductively coupled plasma-atomic emission spectroscopy (ICP-OES) and scanning electron microscopy. The results showed that under the condition of pH = 7, the concentration of La3 + was 40 mg.L-1, the amount of bacteria was 60 mg.L-1 (dry weight) and the adsorption time was 120 min, The maximum adsorption amount reached 141.5 ± 4.72 mg.g-1. The adsorption capacity of bacteria pretreated by hydrochloric acid increased, while the other pretreatment decreased the adsorption capacity of bacteria. Both desorbent citric acid and EDTA can desorb La3 + well. Phanerochaete chrysosporium 210 had a great difference in adsorption capacity for single rare earth ions. Among 15 kinds of mixed rare earth ions, the adsorption capacity of Lu3 +, Sm3 + and Eu3 + is high, and they have some enrichment and separation effects on mixed rare earth ions. Scanning electron microscopy showed that La3 + may be mainly deposited as salt on the surface of mycelium.