Reductive transformation of 2,4-dichlorophenoxyacetic acid by nanoscale and microscale Fe3O4 particles
文献类型：期刊论文
| 作者 | Si, You B.1,2; Fang, Guo D.1; Zhou, Jing2; Zhou, Dong M.2 |
| 刊名 | JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES
 |
| 出版日期 | 2010 |
| 卷号 | 45期号:3页码:233-241 |
| ISSN号 | 0360-1234 |
| 关键词 | 2 4-D Fe3O4 nanoparticles dechlorination degradation |
| DOI | 10.1080/03601231003613641 |
| 通讯作者 | Si, You B.(ybsi2002@yahoo.com.cn) |
| 英文摘要 | Reductive transformation of 2,4-dichlorophenoxyacetic acid (2,4-D) by nanoscale and microscale Fe3O4 was investigated and compared. Disappearance of the parent species and formation of reaction intermediates and products were kinetically analyzed. Results suggest that the transformation of 2,4-D followed a primary pathway of its complete reduction to phenol and a secondary pathway of sequential reductive hydrogenolysis to 2,4-dichlorophenol (2,4-DCP), chlorophenol (2-CP, 4-CP) and phenol. About 65% of 2,4-D with initial concentration of 50 M was transformed within 48 h in the presence of 300 mg L-1 nanoscale Fe3O4, and the reaction rates increased with increasing dosage of nanoscale Fe3O4. The decomposition of 2,4-D proceeded rapidly at optimum pH 3.0. Chloride was identified as a reduction product for 2,4-D in the magnetite-water system. Reductive transformation of 2,4-D by microscale Fe3O4 was slower than that by nanoscale Fe3O4. The reactions apparently followed pseudo-first-order kinetics with respect to the 2,4-D transformation. The degradation rate of 2,4-D decreased with the increase of initial 2,4-D concentration. In addition, anions had a significant adverse impact on the degradation efficiency of 2,4-D. |
| 收录类别 | SCI |
| WOS关键词 | ZERO-VALENT IRON ; PERMEABLE REACTIVE BARRIERS ; AGRICULTURAL SOILS ; DECHLORINATION RATE ; CORROSION PRODUCTS ; DEGRADATION ; NANOPARTICLES ; TRICHLOROETHYLENE ; 2,4-D ; IDENTIFICATION |
| WOS研究方向 | Environmental Sciences & Ecology ; Public, Environmental & Occupational Health |
| WOS类目 | Environmental Sciences ; Public, Environmental & Occupational Health |
| 语种 | 英语 |
| 出版者 | TAYLOR & FRANCIS INC |
| WOS记录号 | WOS:000277586300008 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558817 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Si, You B. |
| 作者单位 | 1.Anhui Agr Univ, Sch Resources & Environm, Hefei, Peoples R China 2.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Si, You B.,Fang, Guo D.,Zhou, Jing,et al. Reductive transformation of 2,4-dichlorophenoxyacetic acid by nanoscale and microscale Fe3O4 particles[J]. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES,2010,45(3):233-241. |
| APA | Si, You B.,Fang, Guo D.,Zhou, Jing,&Zhou, Dong M..(2010).Reductive transformation of 2,4-dichlorophenoxyacetic acid by nanoscale and microscale Fe3O4 particles.JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES,45(3),233-241. |
| MLA | Si, You B.,et al."Reductive transformation of 2,4-dichlorophenoxyacetic acid by nanoscale and microscale Fe3O4 particles".JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES 45.3(2010):233-241. |
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来源：南京土壤研究所
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