Chromium Transport and Fate in Vadose Zone
Effects of Simulated Acid Rain and Colloidal Types
Bibliographic Data
| ID | 15488308 |
|---|---|
| Authors | Wenjing Zhang (0000-0002-1810-791X, Jilin University, corresponding author), Kaichao Zhao (Jilin University), Bo Wan (0000-0003-2387-5419, Jilin University), Zhentian Liang (Jilin University), Wenyan Xu (0009-0006-3701-562X, Chemical Geological Prospecting Institute of Liaoning Province Co., Ltd., Jinzhou 121007, China), Jingqiao Li (0000-0002-7026-2239, Ministry of Water Resources of the People's Republic of China) |
| Year | 2022 |
| Volume | 19 |
| Issue | 24 |
| Pages | 16414-16414 |
| Publication date | 2022-12-07 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | International Journal of Environmental Research and Public Health (JOURNAL) |
| Journal identifiers | ISSN: 1661-7827 • E-ISSN: 1660-4601 |
| Publisher | Multidisciplinary Digital Publishing Institute (PUBLISHER • CH) |
| DOI | 10.3390/ijerph192416414 |
| PMID | 36554303 |
| OpenAlex | W4311849755 |
| Language | EN |
| References cited | 44 |
Chromium (Cr) can enter groundwater through rainfall infiltration and significantly affects human health. However, the mechanisms by which soil colloids affect chromium transport are not well investigated. In this study, column experiments were conducted to simulate the chromium (Cr) transport mechanism in two typical soils (humic acid + cinnamon soil and montmorillonite + silt) in the vadose zone of a contaminated site and the effects of acid rain infiltration conditions. The results showed that Mt colloids have less influence on Cr. The fixation of Cr by colloid mainly occurs in the cinnamon soil layer containing HA colloid. The adsorption efficiency of Cr was increased by 12.8% with the addition of HA. In the HA-Cr system, the introduction of SO4 2- inhibited the adsorption of Cr, reducing the adsorption efficiency from 31.4% to 24.4%. The addition of Mt reduced the adsorption efficiency of Cr by 15%. In the Mt-Cr system, the introduction of SO4 2- had a promoting effect on Cr adsorption, with the adsorption efficiency increasing from 4.4% to 5.1%. Cr release was inhibited by 63.88% when HA colloid was present, but the inhibition owing to changes in acidity was only 14.47%. Mt colloid promotes Cr transport and increases the leaching rate by 2.64% compared to the absence of Mt. However, the effect of acidity change was not significant. Intermittent acid rain will pose a higher risk of pollutant release. Among the influencing factors, the type of colloid had the most significant influence on the efficiency of Cr leaching. This study guides the quantitative assessment of groundwater pollution risk caused by Cr in the vadose zone
Acid rain · Chromium · Colloid · Soil water · Vadose zone · Chemistry · Chromium effects and bioremediation · Environmental Science · Geochemistry and Elemental Analysis · Heavy metals in environment · Environmental Chemistry · Geology · Organic Chemistry · Soil Science
| Highly cited | No |
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