竹炭对水中乙酰甲胺磷的吸附性能研究

A Study on Adsorption of Acephate in Water by Bamboo Charcoal

研究了竹炭对水溶液中乙酰甲胺磷的吸附性能，考察了吸附时间、竹炭用量、粒径、溶液pH值和乙酰甲胺磷初始浓度对吸附效果的影响以及竹炭的再生性能．结果表明：竹炭对乙酰甲胺磷的吸附主要受竹炭用量、粒径、溶液初始浓度的影响，酸性条件有利于竹炭对乙酰甲胺磷的吸附．竹炭对乙酰甲胺磷的动态吸附过程符合二级吸附动力学方程．粒径为0．3～0．15mm的竹炭对乙酰甲胺磷的吸附主要发生在50min之内，此后吸附率变化很小．竹炭对乙酰甲胺磷的吸附符合Langmuir和Freundlich吸附等温方程．吸附后的竹炭进行碱法再生后，其吸附率可达原来的93．6％．

The adsorption of acephate from aqueous solution by bamboo charcoal （BC） was investigated. Affecting parameters w.ere examined, including adsorption time, dose and size of BC, pH value, initial concentration of acephate and the regeneration capability of BC. The results showed that the adsorption capability was mainly dependent on dose, size of BC and initial concentration of acephate. It was also found that acidic condition of solution was good to the adsorption. The kinetic data did fit the pseudo second-order model well. The adsorption of acephate was found to occur mainly at first 50 min using 0. 3 - 0. 15 mm BC, and there was little change in the adsorption rate after 50 min. The adsorption of acephate by BC accorded with Langmuir and Freundlich isotherm models. After first adsorption process, the BC was retreated with alkali for regeneration and it was found that the adsorption rate of after treatment BC could reach to 93.6% of the primary capability.