摘要
研究以壳聚糖为吸附材料,对电镀废水中的镉进行了吸附去除研究,得出了去除电镀废水中镉的适宜条件和方案,获得了较好的去除效果。试验结果表明,在电镀废水中镉浓度约为26 mg/L、壳聚糖用量为3.3 g/L、pH为5.5、室温约25℃、吸附时间为10 min的条件下,镉的去除率达96%以上。动电电位与红外光谱分析表明,化学络合是壳聚糖吸附镉的主要形式,-NH2-、-C=O-、-C=O-NH-、-CH3、-OH是镉的主要吸附基团。
The appropriate condition and scheme of removing cadmium from electroplating wastewater by Chitosan is obtained through studying on adsorping and removing cadmium from electroplating wastewater by Chitosan. Experimental results showed that removing rate of cadmium was above 96 % after adsorbing for 10 min on conditions with cadmium concentration in cadmium - containing electroplating wastewater being about 26 mg/L, with the biomass of Chitosan 3.3 g/L at normal temperature of 25 ℃, pH 5.5. It was effective to treat cadmium in cadmium - containing electroplating wastewater by Chitosan. The zeta potential and infrared spectroscopy showed that chemical chelating was the main adsorption form. and - NH2、C = O-、- C = O - NH-、- CH3、- OH were the main adsorption groups.
出处
《有色矿冶》
2007年第6期42-45,共4页
Non-Ferrous Mining and Metallurgy
基金
国家自然科学基金资助项目(50174014)
辽宁省自然科学基金资助项目(20042021)
辽宁省高科技计划项目(2006223002)
关键词
电镀废水
壳聚糖
镉污染
吸附
electroplating wastewater
Chitosan
cadmium pollution
biosorption
