| Effect of addition of activated carbon on soil pore structure |
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| DOI：10.7606/j.issn.1000-7601.2018.01.05 |
| Key Words: activated carbon soil pore structure double-exponential water retention equation soil capillary pore soil non-capillary pore |
| Author Name | Affiliation | | DING Dian-yuan | School of hydraulic energy and power engineering, Yangzhou University, Yangzhou 225009, China
Institute of Water Saving Agriculture in Arid Areas of China, Northwest Agricultural and Forest University, Yangling 712100, China | | ZHAO Ying | Institute of Water Saving Agriculture in Arid Areas of China, Northwest Agricultural and Forest University, Yangling 712100, China
College of Natural Resources and Environment, Northwest Agriculture and Forestry University, Yangling712100, China | | FANG Yuan | Institute of Water Saving Agriculture in Arid Areas of China, Northwest Agricultural and Forest University, Yangling 712100, China | | FENG Hao | Institute of Water Saving Agriculture in Arid Areas of China, Northwest Agricultural and Forest University, Yangling 712100, China
Institute of Water and Soil Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China |
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| Abstract: |
| Addition of organic materials into soil can improve soil structure. The objective of this study is to investigate the effects of activated carbon on the soil pore structure. In the treatments of different amounts of activated carbon (the percentage of soil weight 0%, 0.1%, 0.3%, 0.6%, 0.9% and 1.2%) and durations of incubation (0, 30, 60, 90 d), we measured the soil total porosity, capillary porosity, and no-capillary porosity using the double-exponential water retention equation. Results showed that activated carbon insignificantly affected soil capillary porosity but significantly increased the soil no-capillary porosity, compared with the control treatment after 90 d, the soil no-capillary porosity of the activated carbon treatments (from low to high)increased 5.8%, 2.5%, 8.7%, 9.1% and 14.7%, respectively. Activated carbon decreased soil bulk density and increased soil total porosity, compared with the control treatment after 90 d, the soil total porosity of the activated carbon treatments (from low to high) increased 1.9%、1.8%、2.3%、2.7% and 4.3%, respectively. The activated carbon significantly decreased the radii of soil capillary pores and increased the radii of soil no-capillary pores. The activated carbon may change the composition of soil organic matters and the activity of soil microorganisms, so the effects of activated carbon on the soil pore structure became more obvious over time. These findings may serve as theoretical basis for the use of activated carbon to improve soil structure. |
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