Zhou Dong-qin, Wei De-zhou
School of Resources & Civil Engineering, Northeastern University, Shengyang 110004, China.
Huan Jing Ke Xue. 2006 Feb;27(2):338-42.
The possibility of removal of heavy metals from waste water by adsorption flotation using Mycobacterium phlei as adsorbent was investigated, and the collection mechanism of collectors on adsorbent was analyzed. From the single flotation tests, it shows that cationic collectors have a stronger collecting ability for Mycobacterium phlei than anionic collectors. The adsorptive flotation experiment shows that floatability process occurred within 10 minutes, the recovery of Mycobacterium phlei and the removing rate of Pb2+ are high by using cationic collectors during pH value from 4 to 7. At 45mmol/L of Di-buty lamine as collector, and 4.75 of pH, the recovery of Mycobacterium phlei and the removing rate of Pb2+ are 92 % and 98%. The isoelectric point of Mycobacterium phlei is 3.09 at pH of the solution, which increased when Pb2+ or Di-buty lamine is adsorption by Mycobacterium phlei. The good floatability of Mycobacterium phlei with cationic collectors results from the intense zeta potential on the surface of cell, Adsorptive flotation may have practical applications for the removal of hazardous metals from contaminated water supplies.
研究了以草分枝杆菌为吸附剂通过吸附浮选从废水中去除重金属的可能性，并分析了捕收剂在吸附剂上的收集机理。单浮选试验表明，阳离子捕收剂对草分枝杆菌的收集能力比阴离子捕收剂更强。吸附浮选实验表明，浮选过程在10分钟内发生，在pH值为4至7时使用阳离子捕收剂，草分枝杆菌的回收率和Pb2+的去除率较高。在以45mmol/L二丁胺为捕收剂、pH值为4.75时，草分枝杆菌的回收率和Pb2+的去除率分别为92%和98%。在溶液pH值下草分枝杆菌的等电点为3.09，当草分枝杆菌吸附Pb2+或二丁胺时等电点升高。草分枝杆菌与阳离子捕收剂具有良好的浮选性是由于细胞表面强烈的ζ电位，吸附浮选在从受污染水源中去除有害金属方面可能具有实际应用价值。
