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| Distribution of Dissolved Organic Matter and Its Properties in Soils Across Different Riparian Zones |
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| KeyWord:Chongming Island; riparian zone; dissolved organic matter（DOM）; excitation-emission matrix（EEM）; fluorescence index（FI） |
| Author Name | Affiliation | | WANG Yu-lai | Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China | | SUN Ji-liang | Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
China Haisum Engineering CO., LTD, Shanghai 200031, China | | YANG Chang-ming | Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China | | CUI Heng-zhao | Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China | | LI Jian-hua | Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China |
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| Abstract: |
| Soil dissolved organic matter（SDOM） plays important roles in carbon cycling and transports of organic and inorganic contaminants in a riparian buffer zone. Here we measured soil organic carbon（SOC） and soil dissolved organic carbon（SDOC） contents, excitation-emission matrix（EEM） fluorescence spectrum of SDOM and optical indices in the samples collected across the typical riparian zones in Chongming Island, China. Soil organic carbon in the surface layer（0~30 cm） accounted for 40% of that in the whole soil profile（0~80 cm）, and SDOC was 5% of SOC and increased from the upland to the buffer zone. SDOM contains humic-like and protein-like substances, mainly derived from recently dead plant debris. Ground water might also contribute to the SDOM in the riparian zone. Most of humic-like substances were adsorbed on soil minerals. |
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