Abstract:

Chitosan has been used as raw material，combining with microwave irradiation and phase transfer catalysis processes for synthesizing O-carboxymethyl chitosan，whose substitution value is 92.3%. O-carboxymethyl chitosan can be used for adsorbing the Cr（Ⅵ） in tannery wastewater，and its adsorption rate can be as high as 98.2% or more. The effects of the dosage of the adsorbent，pH of tannery wastewater and adsorption time on adsorption capacity are discussed. The optimum experimental conditions of treating tannery wastewater are obtained.

Key words: O-carboxymethyl chitosan, microwave irradiation, phase transfer catalysis；Cr（Ⅵ）

摘要：

以壳聚糖为原料结合微波辐射与相转移催化技术合成出取代度为92.3%的O-羧甲基壳聚糖,并用其吸附制革废水中的Cr(Ⅵ),吸附率可达98.2%以上。探讨了O-羧甲基壳聚糖的投加量、废水pH及吸附时间对吸附性能的影响,确定了O-羧甲基壳聚糖处理制革废水的最佳实验条件。

关键词: O-羧甲基壳聚糖, 微波辐射, 相转移催化, Cr(Ⅵ)

CLC Number: 

• X703