Release of dissolved organic carbon from biochar and formation of humic-like component during photoreaction: Effects of Ca2+ and pH
文献类型：期刊论文
| 作者 | Liu, Minmin ; Zhao, Zhiying; Lu, Qingxuan; Yu, Wenzheng
|
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2022-07-01 |
| 卷号 | 219期号:0页码:118616 |
| 关键词 | BLACK CARBON MATTER PHOTOCHEMISTRY PHOTOOXIDATION SUBSTANCES |
| ISSN号 | 0043-1354 |
| 英文摘要 | The photochemical reactivity of dissolved organic carbon from biochar (DBC) was higher than dissolved organic matter (DOM), but the photo-transformation of DBC in the presence of DOM under various conditions are poorly understood. Here, we studied the effects of Ca2+ and pH on the photo-induced changes in the optical and structural properties of DOM in source water with biochar. During DBC photobleaching, the DBC released from bulk DBC while the humic-like component formed. The release of DBC and the formation of humic-like component were inhibited by the presence of Ca2+ attributed to the inhibition of triplet excited state of DOM (3DOM*) and singlet oxygen (1O2) generation. Moreover, the 3DOM* yield increased while the 1O2 generation decreased as pH decreased from neutral, resulting in the increased formation of humic-like component and decreased release of DBC. The characterizations of ultrafiltration-isolated colloidal DOM after irradiation showed that hydrophilicity and the colloidal size of released DBC decreased in the presence of Ca2+. Additionally, the colloidal size of released DBC decreased while the hydrophilicity of DBC enhanced with increasing pH from neutral. This study not only gives insight into the DBC photo-transformation in the presence of DOM under various conditions but also reveals the influence of DBC on the variation of DOM properties during irradiation. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47894]  |
| 专题 | 生态环境研究中心_中国科学院饮用水科学与技术重点实验室 |
| 通讯作者 | Yu, Wenzheng |
| 作者单位 | 1.Zhongyuan Univ Technol, Sch Energy & Environm, Zhengzhou 450007, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China 3.Northeast Forestry Univ, Coll Forestry, Harbin 150040, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Minmin,Zhao, Zhiying,Lu, Qingxuan,et al. Release of dissolved organic carbon from biochar and formation of humic-like component during photoreaction: Effects of Ca2+ and pH[J]. WATER RESEARCH,2022,219(0):118616. |
| APA | Liu, Minmin,Zhao, Zhiying,Lu, Qingxuan,&Yu, Wenzheng.(2022).Release of dissolved organic carbon from biochar and formation of humic-like component during photoreaction: Effects of Ca2+ and pH.WATER RESEARCH,219(0),118616. |
| MLA | Liu, Minmin,et al."Release of dissolved organic carbon from biochar and formation of humic-like component during photoreaction: Effects of Ca2+ and pH".WATER RESEARCH 219.0(2022):118616. |
入库方式： OAI收割
来源：生态环境研究中心
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