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| Effects of soil bulk density and organic matter on Cr（Ⅵ）reduction and transformation |
| Received:July 10, 2024 |
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| KeyWord:soil bulk density;soil organic matter;reduction of Cr（Ⅵ）;transformation of Cr（Ⅵ） |
| Author Name | Affiliation | E-mail | | LI Heping | Henan Academy of Geology, Zhengzhou 450000, China | | | LU Jiachuan | Henan Provincial Resources and Environment Survey Third Academy Co., Ltd., Zhengzhou 450000, China | | | WU Yisu | Henan Academy of Geology, Zhengzhou 450000, China | | | WANG Hengfei | Institute of Eco-Environment and Industrial Technology/Key Laboratory for Soil Environment and Nutrient Resources of Shanxi Province, Shanxi Agriculture University, Taiyuan 030031, China | hfwang@sxau.edu.cn |
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| Abstract: |
| In order to study the effect of soil bulk density（BD）and organic matter content（SOM）on Cr（Ⅵ）reduction and transformation in soil. In this study, laboratory experiments were conducted to simulate the transformation characteristics of Cr（Ⅵ）under different BD and SOM content. The results indicated that：The changes of BD and SOM content significantly affected the reduction and conversion of soil Cr（Ⅵ）（P<0.05）. Compared to the BD was 1.00 g·cm-3, the reduction and conversion amount of Cr（Ⅵ）increased by 8.09%-129.27% with BD increasing from 1.15 g·cm-3 to 1.45 g·cm-3. While compared to the SOM content of 1.13 g·kg-1, the reduction and conversion amount of Cr（Ⅵ）increased by 21.69%-98.15% with SOM content increasing from 5.25 g·kg-1 to 10.75 g·kg-1. When the BD was 1.45 g· cm-3 and the SOM content was 5.25 g· kg-1, the reduction and conversion of Cr（Ⅵ）in the soil reached 42.6%. When the SOM content was low, for example, SOM was 1.13 g·kg-1, the reduction and conversion amount of soil Cr（Ⅵ）could be significantly increased by increasing BD and SOM content, while when the SOM content was high, for example, SOM was 5.25 g·kg-1, increasing BD could significantly increase the reduction and conversion amount of soil Cr（Ⅵ）, but there was uncertainty after increasing SOM content. Therefore, it is suggested to increase the BD and SOM content to promote the reduction and transformation of Cr（Ⅵ）for soils with low organic matter, while for soils with high organic matter, increasing the BD properly is beneficial to increase the reduction and transformation of soil Cr（Ⅵ）. |
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