摘要
以稻壳为原料,经磷酸预处理后,将其用于废水中Cr(Ⅵ)的吸附。当废水中Cr(Ⅵ)初始浓度为200 mg/L、稻壳投加量为30 g/L、吸附温度为30℃、pH为2.5、吸附时间为2.5 h时,Cr(Ⅵ)的吸附率达91%。稻壳对废水中Cr(Ⅵ)的吸附符合Langmuir等温模型和拟二级吸附动力学模型,相关系数R^2分别是0.993 9和0.999,不是颗粒内扩散控制速率。
The rice husk was used as the raw material for the adsorption of Cr（V1） in the waste water after pretreatment with phosphoric acid. When initial concentration of Cr（Ⅵ） in the wastewater was 200 mg/L, dosage of rice husk was 30 g/L, adsorption temperature was 30 ℃ , pH was 2.5, and the adsorption time was 2.5 h, the adsorption rate of Cr（VI）could reach 91%. The date fitted well with the Langmuir isotherms and the pseudo-second-order model. The correlation coefficient of R^2 were 0.993 9 and 0.999, respectively. The intraparticle diffusion was not rate controlling step.
出处
《粮食与油脂》
北大核心
2018年第2期45-49,共5页
Cereals & Oils
基金
吉林省教育厅项目(20160136)
吉林市科技局科技创新项目(20163301)
关键词
稻壳
Cr(Ⅵ)
吸附动力学
吸附平衡
rice husk
Cr（Ⅵ）
adsorption kinetic
adsorption equilibrium
作者简介
白鹭（1971-），女，硕士，讲师，研究方向为水污染控制方向。;通信作者：吴春英。
