壳聚糖对水中磷的吸附处理研究

A Study of the Absorptive Treatment of Phosphor in the Water with Chitosan

采用天然高分子聚合物壳聚糖对含磷废水进行吸附处理，考察了壳聚糖前处理的方式、处理时间、pH值、壳聚糖用量等条件对吸附率的影响，得出壳聚糖前处理最佳pH值为2．0；处理的水样pH值为6．0—6．2时，吸附磷的效果最好；最佳处理时间为40—50min，吸附率达到74．14％，吸附量为0．342mg／g。动态解吸，回收率可达91．84％。壳聚糖还可以进行再生，再生利用率为94．34％，同时还探讨了该方法在实际中的具体应用。

Chitosan, a kind of natural polymer, was used to absorb the phosphor in the sewage. The influences of the pH value of the pre- treatment chitosan, and the time, the pH value, the use level of chitosan during the water treatment on the percent absorption were investigated. The results were as follows： the optimum pH value of pretreatment chitosan was 2, while chitosan in aqueous solution was 6.0 - 6.2; the optimum treating time was 40 - 50min; the percent on was 74.14% and the absorbance was 0.342mg/g. The desorption was dynamic and the recovery was as high as 91.84%. The chitosan could be regenerated and its percent regenerative utilization was 94.34 %. In the mean time, the detail applications of this method in the actual were also discussed.