草酸改性杨树叶对六价铬的吸附性能
doi: 10.13205/j.hjgc.201505014
ADSORPTION CHARACTERISTICS OF HEXAVALENT CHROMIUM ON POPLAR LEAF MODIFIED BY OXALATE
-
摘要: 利用草酸改性杨树叶为试验材料,对溶液中六价铬进行吸附去除。试验结果表明:当p H=2,吸附剂剂量为0.3 g,反应时间为120 min时,该材料对50 m L浓度为50 mg/L含铬废水的去除率达99.1%;伪二级动力学方程能较好地拟合该材料对Cr(VI)的吸附动力学过程,揭示其吸附主要是离子交换吸附;Langmuir方程能较好模拟该材料对Cr(VI)的等温吸附过程,表明其吸附主要是单分子层吸附,最大吸附量为40.91 mg/g。热力学研究表明,Cr(VI)在该材料表面的吸附是一个自发、吸热的物理吸附过程。Abstract: Poplar leaf modified by oxalate as a novel biosorbent was investigated to remove Cr( VI) from aquatic solution in batch experiment. The results indicated that when the pH was 2. 0,adsorbate dosage was 0. 3 g,reaction time was 120 min, the remove rate of the concentration of 50 mg /L Cr( VI) wastewater was 99. 1%. The kinetic adsorption process of Cr( VI) ions on poplar leaf modified by oxalate was fitted by pseudo-second-order kinetic model,and the adsorption was mainly ion exchange adsorption. Langmuir equation could simulate the material process of isothermal adsorption of Cr ( VI) . The fitting results indicated the adsorption of Cr ( VI ) ions was monolayer adsorption,and the maximum adsorption capacity was 40. 91 mg /g. The thermodynamics analysis showed that the adsorption process of Cr( VI) ions on poplar leaf modified by oxalate was spontaneous,endothermic physical adsorption.
期刊类型引用(11)
1. 李艳,曹露,边佳胤,陈炜,冷泽权,赵西增,高运. 基于Mike研究舟山团鸡山岛微塑料泄露的迁移分布及影响. 渔业科学进展. 2024(02): 70-81 . 百度学术
2. 仇付国,梁安棋,童诗雨,王淳. 雨水径流中微塑料的赋存规律探究. 环境工程. 2024(07): 106-112 . 本站查看
3. 席珍华,刘彦东,张婵. 微塑料和抗生素对水生生物联合毒性效应研究进展. 江苏农业学报. 2024(08): 1561-1568 . 百度学术
4. 林雨男,阎波,侯春壹,孙博文. PS微塑料对盐酸环丙沙星的吸附特性研究. 环境科学与技术. 2024(10): 46-57 . 百度学术
5. 陈瑜婕,成松燕,张鑫平. “变宝为废”:可降解塑料政策实践中的问题及成因分析——以N市可降解塑料袋处置为例. 环境社会学. 2024(02): 196-215+228-229 . 百度学术
6. 牛文杰,郑诗杨. 食用型海洋生物资源微塑料污染防治问题研究. 北部湾大学学报. 2024(06): 36-40 . 百度学术
7. 李洁怡,李丽微,何文鸣. 黄粉虫降解微塑料及其红外图谱分析. 广东化工. 2023(04): 192-196 . 百度学术
8. 张路,刘再杰,蒋佳承. PET微纤维对污泥厌氧消化和胞内抗性基因的影响. 广东化工. 2022(08): 115-117 . 百度学术
9. 魏嘉嘉,王隆,沈佳怡,罗希雅,邓丽蓉,贺美. 环境中的微塑料老化对其理化性质和生态毒性的影响. 绿色科技. 2022(10): 195-199 . 百度学术
10. 时巧翠,傅佳宇,陈金媛,周宇畅. 环境新污染物风险防范与化学品环境管理. 化学试剂. 2022(09): 1342-1349 . 百度学术
11. 赵梦婷,秦艺源,邱野,祝美玲,陈威. 微塑料的环境老化机制及效应研究进展. 环境化学. 2022(08): 2465-2477 . 百度学术
其他类型引用(12)
-

计量
- 文章访问数: 289
- HTML全文浏览量: 21
- PDF下载量: 63
- 被引次数: 23