改性山核桃外果皮炭对碱性染料的吸附特性研究

用磷酸活化山核桃外果皮制备的生物质炭吸附剂处理碱性染料废水,研究了该吸附剂对废水中孔雀石绿(MG)和亚甲基蓝(MB)的吸附性能。结果表明,该吸附剂为高效的碱性有机染料吸附剂,当其投加量为1 g/L时,318 K条件下对初始质量浓度为300 mg/L的MG的去除率达99.20%,303 K条件下对初始质量浓度为200 mg/L的MB的去除率达98.48%;吸附动力学符合准二级动力学方程;等温吸附模型符合Langmuir方程。

Research on the characteristics of aIkaIine dyes adsorbed with modified hickory sheII biomass carbon

The biomass carbon adsorbent made from H3PO4-activated hickory shell has been used for treating waste-water containing alkaline dyes. The adsorbing capacity of this adsorbent for malachite green (MG) and methylene blue(MB) in wastewater is studied. The results show that this adsorbent is highly efficient for alkaline organic dyes. When the dosage of adsorbent is 1 g/L,under the temperature condition at 318 K,the removing rate of MG whose initial mass concentration is 300 mg/L reaches 99.20%;while under the temperature condition at 303 K,the removing rate of MB whose initial mass concentration is 200 mg/L reaches 98.48%. The adsorption kinetics is in line with pseudo-second-order kinetics equation,while the isothermal adsorption model is in line with Langmuir equation.