| 摘要: |
| 原位覆盖是修复富营养沉积物的常用方法，碳基材料相对于其他修复材料具有来源广泛、环境友好、无二次污染的优势。本研究对活性焦进行了预处理和结构表征，首次评估了活性焦对沉积物的修复潜力并研究了活性焦（363.9 g/m2）和沉水植物轮叶黑藻（Hydrilla verticillata，32.4 g/m2）单独处理以及联合处理对富营养沉积物营养盐释放的抑制效果及活性焦对沉水植物生长的影响。结果表明，活性焦具有较大的比表面积和丰富的中孔结构，与对照组相比，活性焦处理组显著降低了上覆水CODMn、Chl-a、TN、TP、NH4+-N和SRP浓度，使沉积物TN、TP、NH4+-N和SRP总释放通量分别下降了53.2%、37.3%、105.6%和29.7%。沉水植物处理组显著降低了上覆水NH4+-N、TP和SRP浓度，使NH4+-N、TP和SRP总释放通量分别降低了51.2%、17.1%和17.8%。活性焦和沉水植物联合处理对上覆水和沉积物指标的提升效果优于活性焦或沉水植物单一处理。此外，活性焦处理使沉水植物生长率提高了40.32%。以上结果表明，活性焦具有较好的应用于富营养化水体生态修复的潜力，与沉水植物联合具有协同作用。 |
| 关键词: 活性焦 沉水植物 沉积物 释放通量 生长率 |
| DOI： |
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| 基金项目:国家自然科学基金项目（52260026）、江西省水利厅科技重点项目（202325ZDKT09, 202426ZDKT30）联合资助。 |
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| Study on the effect of activated coke on nutrient release from sediments and growth of submerged plants |
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liu xin1, li wei1, li ning1, liu shu qiong1, dai tao tao2, zhong jia you2, chen yu wei1
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1.Jiangxi Key Laboratory for Intelligent Monitoring and Integrated Restoration of Watershed Ecosystem, Nanchang Institute of Technology;2.Jiangxi Key Laboratory of Watershed Soil and Water Conservation, Jiangxi Academy of Water Science and Engineering
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| Abstract: |
| In situ coverage is a common method for the remediation of eutrophic sediments. Carbon-based materials are advantageous due to their widespread availability, environmental friendliness, and lack of secondary pollution compared to other remediation materials. In this study, we pre-treated and structurally characterized activated coke, assessed its potential for sediment remediation for the first time, and investigated the relationship between activated coke (363.9 g/m2) and the submerged plant (Hydrilla verticillata ,32.4 g/m2) )both individually and in combination. We focused on their effects on nutrient release from eutrophic sediments and the influence of activated coke on the growth of submerged plants. The results indicated that activated coke possesses a large specific surface area and a rich mesoporous structure. Compared to the control group, the activated coke-treated group significantly reduced the concentrations of CODMn, Chl-a, TN, TP, NH4?-N, and SRP in the overlying water, leading to decreases in |
| Key words: Activated coke Submerged plants Sediment Release flux Growth rate |
