Reduced sulfur compounds and carboxylic acid groups in dissolved PFRs of iron-biochar enhance Cr(VI) reduction in anaerobic conditions
文献类型：期刊论文
| 作者 | Hu, Shujie3,5; Liu, Chengshuai4; Bu, Hongling1; Chen, Manjia5; Tang, Jiao2; Jiang, Bin2; Ran, Yong2 |
| 刊名 | BIOCHAR
 |
| 出版日期 | 2024-02-20 |
| 卷号 | 6期号:1页码:17 |
| 关键词 | Biochar Iron-modification PFRs Hexavalent chromium Anaerobic condition |
| ISSN号 | 2524-7972 |
| DOI | 10.1007/s42773-024-00305-6 |
| 英文摘要 | In addition to the adsorption and immobilization capacities of iron-modified biochars, these materials produce persistent free radicals (PFRs) that can carry out metal [i.e., Cr(VI)] redox transformations, but the primary forms and active species of PFRs involved are not well understood. Here, we investigated the key species of PFRs of alpha-Fe2O3-modified biochar (MBC) and their influence on Cr(VI) reduction under anaerobic conditions simulating paddy soil environments. MBC produced bulk phenoxyl PFRs that promoted Cr(VI) reduction due to the catalytic effect of the transition metal Fe. In addition, MBC was more efficient in reducing Cr(VI) under anaerobic conditions than under aerobic conditions due to the more active and accessible dissolved PFRs present in the dissolved organic matter (DOM). The electron transfer capacity of DOM was demonstrated by excitation-emission matrix (EEM) spectrophotometry combined with parallel factor analysis, which showed that the protein-like and humic-like components of DOM were involved in Cr(VI) reduction. Furthermore, Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS) analysis indicated that reduced-S compounds (O/S < 4) and carboxylic acid (-COO) groups in the unsaturated aliphatic and lignin-like compounds are potentially the main active species accelerating Cr(VI) reduction under anaerobic conditions. Our results provide new insights into the role of dissolved PFRs from iron-modified biochar in promoting Cr(VI) reduction under anaerobic conditions such as flooded soils. |
| WOS研究方向 | Environmental Sciences & Ecology ; Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:001165454800001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/76276]  |
| 专题 | 中国科学院广州地球化学研究所 |
| 通讯作者 | Liu, Chengshuai |
| 作者单位 | 1.Guangdong Univ Technol, Sch Environm Sci & Engn, Guangzhou 510006, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 4.Chinese Acad Sci, State Key Lab Environm Geochem, Inst Geochem, Guiyang 550081, Peoples R China 5.Guangdong Acad Sci, Inst Ecoenvironm & Soil Sci, Natl Reg Joint Engn Res Ctr Soil Pollut Control &, Guangdong Key Lab Integrated Agroenvironm Pollut C, Guangzhou 510650, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Shujie,Liu, Chengshuai,Bu, Hongling,et al. Reduced sulfur compounds and carboxylic acid groups in dissolved PFRs of iron-biochar enhance Cr(VI) reduction in anaerobic conditions[J]. BIOCHAR,2024,6(1):17. |
| APA | Hu, Shujie.,Liu, Chengshuai.,Bu, Hongling.,Chen, Manjia.,Tang, Jiao.,...&Ran, Yong.(2024).Reduced sulfur compounds and carboxylic acid groups in dissolved PFRs of iron-biochar enhance Cr(VI) reduction in anaerobic conditions.BIOCHAR,6(1),17. |
| MLA | Hu, Shujie,et al."Reduced sulfur compounds and carboxylic acid groups in dissolved PFRs of iron-biochar enhance Cr(VI) reduction in anaerobic conditions".BIOCHAR 6.1(2024):17. |
入库方式： OAI收割
来源：广州地球化学研究所
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