Manipulation of Persistent Free Radicals in Biochar To Activate Persulfate for Contaminant Degradation
文献类型：期刊论文
| 作者 | Fang, Guodong1; Liu, Cun1; Gao, Juan1; Dionysiou, Dionysios D.2; Zhou, Dongmei1 |
| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2015-05-05 |
| 卷号 | 49期号:9页码:5645-5653 |
| ISSN号 | 0013-936X |
| DOI | 10.1021/es5061512 |
| 通讯作者 | Zhou, Dongmei(dmzhou@issas.ac.cn) |
| 英文摘要 | This study investigated the effects of metals (Fe3+, Cu2+, Ni2+, and Zn2+) and phenolic compounds (PCs: hydroquinone, catechol, and phenol) loaded on biomass on the formation of persistent free radicals (PFRs) in biochar. It was found that metal and phenolic compound treatments not only increased the concentrations of PFRs in biochar but also changed the types of PFRs formed, which indicated that manipulating the amount of metals and PCs in biomass may be an efficient method to regulate PFRs in biochar. These results provided direct evidence to elucidate the mechanism of PFR formation in biochar. Furthermore, the catalytic ability of biochar toward persulfate activation for the degradation of contaminants was evaluated. The results indicated that biochar activates persulfate to produce sulfate radicals (SO4 center dot-) and degraded polychlorinated biphenyls (PCBs) efficiently. It was found that both the concentration and type of PFRs were the dominant factors controlling the activation of persulfate by biochar and that superoxide radical anions account for 20-30% of sulfate radical generation in biochar/persulfate. This conclusion was supported by linear correlations between the concentration of PFRs consumed and the formation of SO4 center dot- and between lambda (lambda = [formed sulfate radicals]/[consumed PFRs]) and g-factors. The findings of this study provide new methods to manipulate PFR concentration in biochar for the transformation of contaminants and development of new alternative activators for persulfate-based remediation of contaminated soils. |
| 收录类别 | SCI |
| WOS关键词 | SITU CHEMICAL OXIDATION ; ZERO-VALENT IRON ; AQUEOUS-SOLUTIONS ; POLYCHLORINATED-BIPHENYLS ; HYDROGEN-PEROXIDE ; HYDROXYL RADICALS ; AS(III) OXIDATION ; PH-DEPENDENCE ; SULFATE ; GENERATION |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
| WOS类目 | Engineering, Environmental ; Environmental Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000354155800048 |
| 出版者 | AMER CHEMICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558385 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Zhou, Dongmei |
| 作者单位 | 1.Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China 2.Univ Cincinnati, Environm Engn & Sci Program, Cincinnati, OH 45221 USA |
| 推荐引用方式 GB/T 7714 | Fang, Guodong,Liu, Cun,Gao, Juan,et al. Manipulation of Persistent Free Radicals in Biochar To Activate Persulfate for Contaminant Degradation[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2015,49(9):5645-5653. |
| APA | Fang, Guodong,Liu, Cun,Gao, Juan,Dionysiou, Dionysios D.,&Zhou, Dongmei.(2015).Manipulation of Persistent Free Radicals in Biochar To Activate Persulfate for Contaminant Degradation.ENVIRONMENTAL SCIENCE & TECHNOLOGY,49(9),5645-5653. |
| MLA | Fang, Guodong,et al."Manipulation of Persistent Free Radicals in Biochar To Activate Persulfate for Contaminant Degradation".ENVIRONMENTAL SCIENCE & TECHNOLOGY 49.9(2015):5645-5653. |
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来源：南京土壤研究所
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