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Modified red soil combined with aquatic plants to control sediment phosphorus release
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Lin-xi ZOU1, 2, Dan-li LI1, 2, Kang-long CHENG1, 2, Yu ZHANG1, 2, Wen ZHANG1, 2, 3, *
China Environmental Science | 2025, 45(5) : 2780 - 2791
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China Environmental Science | 2025, 45(5): 2780-2791
• Environmental Ecology •
Modified red soil combined with aquatic plants to control sediment phosphorus release
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Lin-xi ZOU1, 2, Dan-li LI1, 2, Kang-long CHENG1, 2, Yu ZHANG1, 2, Wen ZHANG1, 2, 3, *
Affiliations
  • 1.College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, China
  • 2.Key Laboratory of Collaborative Control and Joint Remediation of Soil and Water Pollution in National Environmental Protection, Chengdu 610059, China
  • 3.State Key Laboratory of Geological Disaster Prevention and Geological Environment Protection, Chengdu 610059, China
Published: 2025-05-20
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This study utilized natural red clay（RC）and 700°C calcined red clay（CRC-700）to form treatment groups combined with submerged macrophytes Vallisneria spiralis（VS）and Ceratophyllum demersum（CD）, aiming to develop a treatment technology effective in controlling sedimentary phosphorus（P）release. The results demonstrated that the VS+CRC-700 treatment group exhibited superior performance in reducing and removing sedimentary P compared to other treatments. Specifically, dissolved reactive phosphorus（SRP）in the overlying water of the VS+CRC-700 group was significantly reduced from 1.38 mg/L to 0.024 mg/L compared to the control group. Additionally, the concentrations of Fe（II）-P and iron-aluminum bound phosphorus（CDB-P）in different sediment layers were maximally decreased by 94 and 488.03 mg/kg, respectively. Meanwhile, the VS+CRC-700 treatment markedly enhanced P immobilization in sediments, with Ca-P content increasing by up to 182.78mg/kg across sediment layers. Furthermore, microbial community analysis revealed that VS+CRC-700 increased sediment microbial abundance by 5403 units, while reducing the relative abundances of Proteobacteria and Bacteroidetes by 16.56% and 33.33%, respectively. These findings collectively suggest that VS+CRC-700 represents a cost-effective and high-efficiency technology for improving water quality in P-polluted systems. Its application demonstrates significant potential in controlling sedimentary P release under weak hydrodynamic conditions.

black odorous sediment  /  red soil  /  Vallisneria spiralis  /  Ceratophyllum demersum  /  phosphorus form
Lin-xi ZOU, Dan-li LI, Kang-long CHENG, Yu ZHANG, Wen ZHANG. Modified red soil combined with aquatic plants to control sediment phosphorus release[J]. China Environmental Science, 2025 , 45 (5) : 2780 -2791 .
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Year 2025 volume 45 Issue 5
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  • Receive Date：2024-09-13
  • Online Date：2026-03-18
  • Published：2025-05-20
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  • Received：2024-09-13
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Affiliations
    1.College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, China
    2.Key Laboratory of Collaborative Control and Joint Remediation of Soil and Water Pollution in National Environmental Protection, Chengdu 610059, China
    3.State Key Laboratory of Geological Disaster Prevention and Geological Environment Protection, Chengdu 610059, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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