Arsenite simultaneous sorption and oxidation by natural ferruginous manganese ores with various ratios of Mn/Fe
文献类型：期刊论文
| 作者 | Ma, Lin1,2; Cai, Dongmei3; Tu, Shuxin3 |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2020-02-15 |
| 卷号 | 382页码:11 |
| 关键词 | Natural ferruginous manganese ore Arsenite Adsorption Oxidation Pyrophosphate |
| ISSN号 | 1385-8947 |
| DOI | 10.1016/j.cej.2019.123040 |
| 英文摘要 | Arsenite [As(III)], is more toxic and difficult to remove from aqueous systems compared to arsenate [As(V)], and as such poses a significant health risk to humans and the environment. In order to make it more amenable to efficient removal, an oxidation pre-treatment of As(III) is particularly important. Compared to synthetic adsorbents, the low cost and abundance of natural ferruginous manganese ore (NFMO), make it a potentially attractive adsorbent for application in large-scale treatments. Here, we investigated the simultaneous oxidation and adsorption behaviour of As(III) with three NFMOs, each consisting of different Mn/Fe molar ratios. Results demonstrated that the NFMO with a high Mn:Fe ratio had a stronger oxidation capacity for As(III), while As(III) adsorption efficiency of NFMOs increased with increasing Fe content. The sorbent dosage was an important factor for As(III) oxidation with NFMOs having higher Mn contents, but not for ores with low contents. An pH increasing from 6 to 7.9 enhanced the As(III) oxidation by NFMOs. Furthermore, the As(III) oxidation rate of NFMO increased by 68% with the addition of pyrophosphate (PP), and increasing PP concentrations led to higher oxidation rates. During the process, PP formed complexes with Mn(III), thus accelerating the conversion of Mn(IV) to Mn(III). Later, the dissolution of these complexes led to a generation of additional oxidation adsorption sites, favouring As(III) oxidation. FTIR and XPS analyses further confirmed that reduction of Mn(IV) and Mn(III) species played a vital role in the oxidation of As(III) to As(V). As(III) removal by NFMO was attributed to the joint effect of sorption and oxidation processes, where Manganese oxide was responsible for As(III) oxidation, while Fe oxide played a primary role in the arsenic sorption. |
| 资助项目 | National Natural Science Foundation of China[41471407] ; National Natural Science Foundation of China[51709255] ; China Postdoctoral Science Foundation[2017M622555] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000503381200028 |
| 出版者 | ELSEVIER SCIENCE SA |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/14640]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Tu, Shuxin |
| 作者单位 | 1.Chinese Acad Sci, Wuhan Bot Garden, Key Lab Aquat Bot & Watershed Ecol, Wuhan 430074, Hubei, Peoples R China 2.Chinese Acad Sci, Core Bot Gardens, Ctr Plant Ecol, Wuhan 430074, Hubei, Peoples R China 3.Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Lin,Cai, Dongmei,Tu, Shuxin. Arsenite simultaneous sorption and oxidation by natural ferruginous manganese ores with various ratios of Mn/Fe[J]. CHEMICAL ENGINEERING JOURNAL,2020,382:11. |
| APA | Ma, Lin,Cai, Dongmei,&Tu, Shuxin.(2020).Arsenite simultaneous sorption and oxidation by natural ferruginous manganese ores with various ratios of Mn/Fe.CHEMICAL ENGINEERING JOURNAL,382,11. |
| MLA | Ma, Lin,et al."Arsenite simultaneous sorption and oxidation by natural ferruginous manganese ores with various ratios of Mn/Fe".CHEMICAL ENGINEERING JOURNAL 382(2020):11. |
入库方式： OAI收割
来源：武汉植物园
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。