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以板栗壳作为吸附剂,研究其对模拟印染废水中孔雀石绿和刚果红的吸附性能。结果表明:在染料初始浓度100mg/L,板栗壳投加量2.0g/L,废水初始pH=7.0下,对孔雀石绿的去除率为95.20%;废水初始pH=5.0~8.0下,对刚果红的去除率为92.88%。将板栗壳吸附孔雀石绿和刚果红的过程用准一级动力学方程、准二级动力学方程、Elovich方程和双常数方程进行拟合,结果表明板栗壳对两种染料的吸附过程均符合准二阶动力学方程,说明该吸附过程以化学吸附为主;其等温吸附过程可以用Freundlich方程描述,说明该吸附以多分子层吸附为主。
The chestnut shells were used as adsorbents to study the adsorption properties of malachite green and congo red in simulated printing and dyeing wastewater. The results showed that the removal rate of malachite green was 95.20% when the initial concentration of dye was 100mg / L, the dosage of chestnut shell was 2.0g / L, the initial pH of wastewater was 7.0, the initial pH of wastewater was 5.0-8.0, Red removal rate of 92.88%. The process of adsorption of malachite green and congo red on chestnut shell was fitted by quasi-first-order kinetic equation, quasi-second-order kinetic equation, Elovich equation and bivariate equation. The results showed that the adsorption process of chestnut shell to both dyes was in accordance with Quasi-second-order kinetic equation, indicating that the adsorption process mainly chemical adsorption; its isothermal adsorption process can be described by Freundlich equation, indicating that the adsorption of multi-molecular layer based adsorption.