壳聚糖改性竹炭对铜吸附性能研究

Adsorption Behavior of Modified Chitosan Bamboo Charcoal on Cu

为了提高竹炭去除废水中重金属离子能力,采用交联法设计合成新型的磁性壳聚糖改性竹炭复合吸附剂,并采用傅里叶红外光谱对改性竹炭复合吸附剂进行表征,同时开展不同Cu^(2+)初始浓度、吸附剂投加量、吸附时间、pH和温度等因素对Cu^(2+)吸附去除率的影响。结果表明,吸附效率与Cu^(2+)初始浓度和吸附剂投加量成正效应;吸附平衡时间约8 h;在作用温度范围内,吸附效率随温度升高而上升;pH为7时吸附效果最好。振荡条件吸附效果优于静置处理。该结果为废水重金属深度处理及水环境保护提供依据。

To improve the remediation ability of bamboo charcoal on heavy metal pollution in wastewater, a novel magnetic chitosan modified bamboo charcoal composite adsorbent was designed and synthesized by crossing-linking method. The structure of compound adsorbent was characterized by Fourier transform infrared spectroscopy(FTIR). At the same time, the effects of different initial Cu^(2+) concentration, adsorbent dosage,adsorption time, pH value and temperature on Cu^(2+) adsorption rate were studied. The results showed that the adsorption efficiency had a positive effect on the initial concentration of Cu^(2+) and the dosage of adsorbent;The adsorption equilibrium time was about 8 h;Within the range of temperature treatment, the adsorption efficiency increased with the increase of temperature;When pH was 7, the adsorption rate was the highest and the effect was the best. Under the condition of oscillation, the adsorption effect was better than that of static treatment. The results provided a basis for the advanced treatment of heavy metals in wastewater and the protection of water environment.