Insights into the activation of ozonation by hydroxylamine: Influential factors, degradation mechanism and reaction kinetics
文献类型：期刊论文
| 作者 | Qin, Wenlei; Yuan, Xiangjuan; Sun, Lei; Qiang, Zhimin; Xia, Dongsheng |
| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
 |
| 出版日期 | 2019-07-05 |
| 卷号 | 373页码:600-607 |
| 关键词 | Ozonation Hydroxylamine hydrochloride Reaction mechanism Transformation products Kinetic model |
| ISSN号 | 0304-3894 |
| 英文摘要 | The decontamination of prometon (PMT) by ozone/hydroxylamine hydrochloride (O-3/HAC) was systematically investigated in this study with focus on the degradation mechanism and kinetics. Experimental results revealed that there was an enhancement of PMT degradation efficiency by 42.1% and the pseudo-first-order rate constant by more than 5.7 times in O-3/HAC process under low HAC dosage (5 mg L-1) after 3 min in comparison with O-3 alone. The second-order rate constant of PMT with hydroxyl radical ((OH)-O-center dot) was determined to be (1.84 +/- 0.1) x 10(9) M-1 s(-1) and 7.80 x 10(9) M-1 s(-1) via competition kinetics and (OH)-O-center dot steady-state hypothesis, respectively. The PMT removal in 0 3 /HAC process was highly pH-dependent and the optimum degradation performance was achieved under pH 5.0. In addition, (OH)-O-center dot and singlet oxygen were identified as the primary reactive oxygen radicals in O-3/HAC process. Meanwhile, eleven transformation products of PMT were identified and possible degradation mechanisms were proposed. Moreover, a kinetic model based on chemical kinetics and steady-state hypothesis was developed and modified to predict the PMT abatement in O-3/HAC process. The results demonstrated that the O-3/HAC process provided a promising alternative for refractory organic pollutants decontamination in water treatment. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/42659]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 作者单位 | 1.Wuhan Text Univ, Sch Environm Engn, 1 Sunshine Ave, Wuhan 430200, Hubei, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, 18 Shuang Qing Rd, Beijing 100085, Peoples R China 3.Minist Educ, Engn Res Ctr Clean Prod Text Dyeing & Printing, 1 Sunshine Ave, Wuhan 430200, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qin, Wenlei,Yuan, Xiangjuan,Sun, Lei,et al. Insights into the activation of ozonation by hydroxylamine: Influential factors, degradation mechanism and reaction kinetics[J]. JOURNAL OF HAZARDOUS MATERIALS,2019,373:600-607. |
| APA | Qin, Wenlei,Yuan, Xiangjuan,Sun, Lei,Qiang, Zhimin,&Xia, Dongsheng.(2019).Insights into the activation of ozonation by hydroxylamine: Influential factors, degradation mechanism and reaction kinetics.JOURNAL OF HAZARDOUS MATERIALS,373,600-607. |
| MLA | Qin, Wenlei,et al."Insights into the activation of ozonation by hydroxylamine: Influential factors, degradation mechanism and reaction kinetics".JOURNAL OF HAZARDOUS MATERIALS 373(2019):600-607. |
入库方式： OAI收割
来源：生态环境研究中心
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