[1]王盼新,郦歆飞,王昀鹏,等.二价铁活化过二硫酸盐对As(Ⅲ)的去除效能与机理[J].中国给水排水,2020,36(23):14-20.
　WANG Pan-xin,LI Xin-fei,WANG Yun-peng,et al.Removal Efficiency and Mechanism of As(Ⅲ) by Ferrous Activated Peroxydisulfate[J].China Water & Wastewater,2020,36(23):14-20.
点击复制

二价铁活化过二硫酸盐对As(Ⅲ)的去除效能与机理

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第36卷 期数: 2020年第23期 页码: 14-20 栏目: 出版日期: 2020-12-01
Title:
Removal Efficiency and Mechanism of As(Ⅲ) by Ferrous Activated Peroxydisulfate
作者:
王盼新1，郦歆飞2，王昀鹏1，马军1，江进3，金海娟4，杨秋明4
(1.哈尔滨工业大学环境学院，黑龙江哈尔滨150090；2.南昌市城市规划设计研究总院，江西南昌330038；3.广东工业大学环境生态工程研究院，广东广州510006；4.黑龙江省绥化生态环境监测中心，黑龙江绥化152000)
Author(s):
WANG Pan-xin1，LI Xin-fei2，WANG Yun-peng1，MA Jun1，JIANG Jin3，JIN Hai-juan4，YANG Qiu-ming4
(1. School of Environment, Harbin Institute of Technology, Harbin 150090, China; 2. Nanchang Urban Planning & Design Institute, Nanchang 330038, China; 3. Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou 510006, China; 4. Suihua Ecological Environment Monitoring Center of Heilongjiang Province, Suihua 152000, China)
关键词:
二价铁; 过二硫酸盐; 三价砷; 氧化; 吸附
Keywords:
ferrous; peroxydisulfate (PDS); As(Ⅲ); oxidation; adsorption
摘要:
过二硫酸盐（PDS）对As(Ⅲ)几乎没有氧化作用，利用Fe(Ⅱ)活化PDS，并用于氧化去除As(Ⅲ)，探讨了Fe(Ⅱ)和PDS的投加量、pH值对Fe(Ⅱ)/PDS体系氧化As(Ⅲ)效能以及原位生成铁氢氧化物吸附As(Ⅴ)效能的影响。实验结果表明，在pH值=5的条件下，氧化去除10 μmol/L的As(Ⅲ)最适宜的Fe(Ⅱ)和PDS投加量均为30 μmol/L，此时As(Ⅴ)的生成率为87.2%，总砷去除率为98.9%。pH值显著影响Fe(Ⅱ)/PDS体系的除砷效果，酸性条件更有利于As(Ⅲ)的氧化，但不利于对As(Ⅴ)的吸附，综合考虑，去除As(Ⅲ)的最佳pH值为5。自由基淬灭实验证明SO4·-是Fe(Ⅱ)/PDS体系中主要的活性氧化物质;XPS表征显示体系原位生成的铁是羟基氧化铁，铁的价态为+3价。砷基本以As(Ⅴ)形式被吸附去除。
Abstract:
Peroxydisulfate (PDS) alone has almost no oxidation on As(Ⅲ). Herein, PDS activated by ferrous, namely Fe(Ⅱ)/PDS system, was applied to remove As(Ⅲ), and the effects of Fe(Ⅱ) and PDS dosages and pH value on oxidizing efficiency of As(Ⅲ) and the adsorption of arsenic by iron hydroxide generated in the system were investigated. When pH value was 5, the optimal dosages of Fe(Ⅱ) and PDS for 10 μmol/L As(Ⅲ) removal were both 30 μmol/L, and the generation rate of As(Ⅴ) was 87.2% and the total removal efficiency of arsenic was 98.9%. It was revealed that the pH value of the solution played a critical role on the removal efficiency of arsenic in the Fe(Ⅱ)/PDS system. Acidic condition was profitable for the oxidation of As(Ⅲ), but it was not beneficial for the adsorption of As(Ⅴ). Thus, the optimal pH value for As(Ⅲ) removal was 5. Free radical quenching experiment proved that SO4·- was the main oxygen species in the system. XPS characterization confirmed that the iron generated in situ in the system was iron oxyhydroxide, and the valence of iron was +3. Arsenic was basically adsorbed and removed in the form of As(Ⅴ).

相似文献/References:

[1]李圭白,杨海洋,仲琳,等.锰质滤膜活性对接触氧化除锰及除氨氮效能的影响[J].中国给水排水,2020,36(21):1.
　LI Gui-bai,YANG Hai-yang,ZHONG Lin,et al.Effect of Manganese Oxides Film Activity on Removal Efficiencies of Manganese and Ammonia Nitrogen by Contact Oxidation[J].China Water & Wastewater,2020,36(23):1.

更新日期/Last Update: 2020-12-01