阳离子壳聚糖对铅·汞离子吸附性能的研究

通过阳离子壳聚糖对铅、汞离子的吸附试验和共吸附试验研究了阳离子壳聚糖对铅、汞离子吸附时间、温度、pH值等影响因素及由相关实验所得到的最佳吸附条件求得的吸附方程。结果表明,阳离子壳聚糖对汞、铅单独存在时的最大吸附量分别为1.31、1.14mmol/g;阳离子壳聚糖对共存汞、铅离子的最大吸附容量分别为0.96、0.42 mmol/g,阳离子壳聚糖在汞、铅离子共存时优先吸附汞离子,且总吸附量略有提高。

Studies on Adsorption Ability of Cationic Chitosan for Lead Ion and Mercury Ion

The influencing factors,including adsorption time,temperature and the pH value,were studied in adsorption test and co-adsorption test by cationic chitosan for lead ion and mercury ion.And adsorption equations were obtained on the basis of the optimum adsorption condition got from the adsorption tests.Results showed that the maximum adsorption capacity for mercury ion and lead ion were 1.31 and 1.14 mmol/g resp.when they existed separately,while the maximum adsorption capacity for mercury ion and lead ion were 0.96 mmol/g and 0.42 mmol/g when they existed together.So cationic chitosan had preferential adsorption for mercury ion and the total adsorption capacity increased slightly when mercury ion and lead ion existed together in co-adsorption test.