不同果皮对六价铬的吸附

以香蕉皮和柚子皮作为生物吸附剂,分别考察了溶液p H、果皮粉末用量、搅拌吸附时间、Cr(VI)的初始浓度对Cr(VI)离子去除率的影响。结果表明,对于含Cr(VI)离子的K2Cr2O7溶液,当其p H为1,香蕉皮用量为0.6 g/50 m L、柚子皮用量为1.2 g/50 m L时,Cr(VI)离子的去除率最高,经过200 min香蕉皮粉末和柚子皮粉末的吸附,Cr(VI)去除率分别可达85%和88%,且Cr(VI)初始浓度较低时其去除率更高。

Adsorption of Cr(VI) by Different Fruit Peels

A biological adsorbent was prepared from banana or shaddock peels to remove Cr(VI) in solution. The influences of pH, dosage of fruit peel powder, stirring absorption time and initial Cr(VI) concentration on the removal rate of Cr(VI) were investigated in the experiments. The results showed that, the removal rate of Cr(VI) could reach the highest value when the pH of K2Cr2O7 was 1, the dosages of banana peel and shaddock peel were 0.6 g/50 mL and 1.2 g/50 mL respectively. After stirring for 200 min, the removal rates of Cr(VI) by banana peel and shaddock peel could reach 85% and 88%, respectively. The greater removal rate could be obtained when the initial concentration of Cr(VI) was low.