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| Improvement effect of three environmental materials and their composite application on saline-alkali soil |
| Received:August 08, 2019 |
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| KeyWord:saline-alkali soil;pH;sodium adsorption ratio;desulfurization gypsum;environmental materials |
| Author Name | Affiliation | E-mail | | JIN Meng-ye | College of Chemistry and Environmental Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China | | | HUANG Juan | Shenzhen Tiehan Ecological Environment Co. Ltd., Shenzhen 518040, China | | | HOU Pin | College of Chemistry and Environmental Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China | | | HUANG Zhan-bin | College of Chemistry and Environmental Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China | Zbhuang2003@163.com |
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| Abstract: |
| In order to develop novel organic-inorganic composite materials to improve the capacity of saline-alkali soil, this study used a soil column leaching simulation method and analyzed the effects of desulfurization gypsum, modified humic acid, polymer materials, and composite materials on improving the physical and chemical properties of saline-alkali soil; the material improvement mechanism was also investigated. The results showed that compared with the control without any additional material, desulfurization gypsum significantly decreased the pH and sodium adsorption ratio(SAR) of saline-alkali soil by 7.46% and 37.7%, respectively. The modified humic acid decreased the water-soluble salt content of saline-alkali soil by 64.61% after leaching. The polymer material significantly enhanced the water-retaining effect of saline-soil, and the volume of saline-alkali leaching decreased by 33.1%. The amount of aggregates in leached saline-alkali soil treated with the three kinds of composite materials increased by 20.41%, while the pH and SAR decreased by 0.81% and 26.23%, respectively. The result show that the three materials can improve the physical and chemical properties of saline-alkali soil as well as the soil structure. |
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