A holistic insight on stability and transport of hematite colloid: Role of various environmental factors
文献类型：期刊论文
| 作者 | Yang, Xiao1; Gao, Yu1,2; Lv, Yuan3; Yan, Xiulan1; Jia, Yinggang4; Shang, Jianying3 |
| 刊名 | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
 |
| 出版日期 | 2024-10-01 |
| 卷号 | 12期号:5页码:113564 |
| 关键词 | Hematite colloids Humic acid Aggregation Transport |
| DOI | 10.1016/j.jece.2024.113564 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Hematite colloids (Hem) could carry pollutants into deep underground environments and its potential ecological risk needs to be evaluated. This study investigated the aggregation and transport behavior of Hem under different solution pH, electrolyte concentration and humic acid (HA) concentration. Rising the electrolyte concentration would shrink the double electric layer of Hem, weaken the electrostatic repulsion and promote the aggregation of Hem. The critical coagulation concentration (CCC) of Hem was higher at pH 5 (48.83 mM) than pH 10 (24.70 mM), implying that Hem were more stable under acidic conditions than under alkaline conditions. The addition of HA increased the negative charge of Hem and improved the electrostatic repulsion between colloid and sand surface, thus intensifying the stability and mobility of Hem. High HA concentration (>= 0.5 mg/L) had little effect on the surface charge of Hem, indicating that electrostatic repulsion was not the dominant, however increasing HA significantly improve the stability and transport of Hem by stimulating the steric hindrance interaction. The effect of HA on the transport of Hem under acidic condition was significantly higher than that under alkaline condition because HA changed the surface charge of Hem from positive to negative under acidic condition, so that the electrostatic repulsion between the colloid and sand surface increased sharply and accompanied by a significant penetration. This study exhibited a holistic view on the aggregation and transport behavior of Hem in typical soil environment, and extended the understanding of co-transport potential mechanisms of colloids with contaminants and/or nutrients. |
| WOS关键词 | DISSOLVED ORGANIC-MATTER ; HUMIC-ACID ; AGGREGATION KINETICS ; BIOCHAR COLLOIDS ; AQUEOUS-SOLUTION ; POROUS-MEDIA ; ADSORPTION ; NANOPARTICLES ; SUBSTANCES ; GOETHITE |
| WOS研究方向 | Engineering |
| WOS记录号 | WOS:001267544100001 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/206053]  |
| 专题 | 陆地表层格局与模拟院重点实验室_外文论文 |
| 通讯作者 | Yan, Xiulan |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Patterns & Simulat, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.China Agr Univ, Coll Land Sci & Technol, Beijing 100193, Peoples R China 4.China Univ Geosci, Sch Engn & Technol, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Xiao,Gao, Yu,Lv, Yuan,et al. A holistic insight on stability and transport of hematite colloid: Role of various environmental factors[J]. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING,2024,12(5):113564. |
| APA | Yang, Xiao,Gao, Yu,Lv, Yuan,Yan, Xiulan,Jia, Yinggang,&Shang, Jianying.(2024).A holistic insight on stability and transport of hematite colloid: Role of various environmental factors.JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING,12(5),113564. |
| MLA | Yang, Xiao,et al."A holistic insight on stability and transport of hematite colloid: Role of various environmental factors".JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 12.5(2024):113564. |
入库方式： OAI收割
来源：地理科学与资源研究所
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