| 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，活性焦处理组上覆水CODMn、Chl.a、TN、TP、NH3-N、SRP浓度和沉积物TN、TP、NH3-N、SRP总释放通量均显著降低。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%，并显著降低了沉水植物体内活性磷的含量，从而降低了沉水植物衰亡后磷释放的风险。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： |
| 分类号: |
| 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 University of Water Resources and Electric Power;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 commonly used method for the remediation of eutrophic sediments. Carbon-based materials offer several advantages, including widespread availability, environmental friendliness, and the absence of secondary pollution, particularly when compared to other remediation options. In this study, we pre-treated and structurally characterized activated coke and assessed its potential for sediment remediation for the first time. We examined the effects of activated coke (363.9 g/m2) and the submerged aquatic plant (Hydrilla verticillata, 32.4 g/m2) both individually and in combination on nutrient release from eutrophic sediments, as well as the impact of activated coke on the growth of submerged plants. The results demonstrated that activated coke possesses a high specific surface area and a rich mesoporous structure. Compared to the control group, the concentrations of CODMn, Chl.a, TN, TP, NH3-N, and SRP in the overlying water, as well as the total release fluxes of TN, TP, NH3-N, and SRP from the sediments, were significantly reduced. The combination treatment of activated coke and submerged plants yielded better results for the overlying water and sediment indicators than either treatment alone. Furthermore, the activated coke treatment increased the growth rate of submerged plants by 40.32% and significantly reduced the amount of reactive phosphorus within the plants, thereby decreasing the risk of phosphorus release after their decay. These findings indicate that activated coke has strong potential for application in the ecological restoration of eutrophic water bodies and exhibits a synergistic effect when combined with submerged plants. |
| Key words: Activated coke Submerged plants Sediment Release flux Growth rate |
