【摘要】 交联薯渣黄原酸酯(CCX)废水中Cr(Ⅵ)离子的吸附,探讨了pH值、温度、吸附时间、CCX含硫量、Cr(Ⅵ)初始浓度等因素对其吸附效果的影响。结果表明,当CCX加入量为理论加入量的3.0倍时,pH为2.5,在45℃下搅拌反应50 min,对Cr(Ⅵ)的吸附容量为37.76 mg/g,去除率达到99.69%,处理后的废水中Cr(Ⅵ)浓度为0.15 mg/L,低于国标排放标准(0.5 mg/L)。并通过红外光谱和热重分析,对CCX吸附Cr(Ⅵ)的机理进行了探讨。更多还原

【Abstract】 Adsorption of chromium(Ⅵ) from aqueous solution by crosslinked cassava residue xanthate was studied.The effect of pH value,temperature,adsorption time,sulfur content of CCX,initial concentration of chromium(Ⅵ) on the efficiency of chromium(VI) ion-removal were investigated.It was found that when the CCX amount was 3.0 times of its theoretical amount,pH value was 2.5,and the time for agitating at 45 ℃ was 50 min,the adsorption capacity of Cr(VI) was 37.76 mg/g,the Cr(VI) removal efficiency was up to 99.69%,and the concentration of Cr(Ⅵ) in treated waste water was 0.15 mg/L,which was lower than the national standard emission standards(0.5 mg/L).The adsorption mechanism of chromium(Ⅵ) by crosslinked cassava residue xanthate was discussed with infrared spectroscopy and thermogravimetric analysis.更多还原