改性桂圆壳吸附废水中的Zn^(2+)

Adsorping Zn^(2+) of Waste Water with Modified Longan Shell

以桂圆壳作为吸附剂吸附废水中Zn2+,探讨了吸附时间、吸附剂用量、pH值以及吸附剂改性后对吸附率的影响。结果表明,桂圆壳生物吸附剂在吸附锌的初始阶段(0～1.5h)开始是一个启动吸附的过程,2.5h时达到最佳吸附;最佳固液比为0.05g/25ml(100μg/ml);在pH=2时,由氢氧化钠,丙酮处理过的桂圆壳粉的吸附能力最强,由柠檬酸处理的桂圆壳粉在pH=7时,吸附率最高。

The longan shells ingredients as the absorbent adsorption Zn2＋ of waste water, the influence of the adsorption time, dosage, pH and adsorption rate with modified absorbent are discussed. The results show that shell biological absorbed in longan adsorption zinc initial stage （0 - 1.5 h） is a launching adsorption process, gets the maximization after 2.5 h. The optimization solid-liquid ratio is 0.05 g / 25 ml （ 100 ug/ml）. The adsorption ability of longan shell power processed with sodium hydroxide and acetone is best while pH = 2. And the adsorption is highest when longan shell powder is processed with citric acid with pH of 7.