壳聚糖对高锰地下水的吸附研究

Research of chitosan absorption to high manganese groundwater

对壳聚糖吸附高锰地下水进行了研究,考察了吸附剂用量、时间、温度、pH值对壳聚糖吸附性能的影响。结果表明,对含1 mg/L的高锰地下水,吸附条件为:温度40℃,壳聚糖量0.8 g,时间8 h,pH为10时,壳聚糖对其的吸附率为98.78%;壳聚糖对Mn2+的吸附具有Langmu ir吸附特征,分子中的氨基与Mn2+发生了配位作用,吸附机理以单分子层化学吸附为主,吸附量受温度影响不大。

The absorption properties of chitosan to the high content of manganese in groundwater was researched. The effect of adsorbent dosage, time, temperature and pH on absorption property of chitosan were studied. The results showed that： the chitosan absorption rate was 98.78% for groundwater with the high content of manganese 1 mg/L,temperature 40℃ ,chitosan 0.8 g, time 8 h ,and pH 10. The absorption has Langmuir characteristics for the chitosan absorption of Mn2＋ The coordination of amino and Mn2＋ happened, the absorption mechanism was mainly monomolecular layer chemical absorption, the temperature has little effect on absorption capacity.