合肥工业大学学报自科版

合肥工业大学学报(自然科学版)

JOURNAL OF HEFEI UNIVERSITY OF TECHNOLOGY (NATURAL SCIENCE)

主管：中华人民共和国教育部

主办：合肥工业大学

ISSN 1003-5060, CN 34-1083/N

洗脱对上覆水环境及底泥氮磷迁移转化的影响

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Effect of the elution on upper water environment and nitrogen and phosphorus migration and transformation in the sediment

期刊信息

合肥工业大学（自然科学版），2024年11月，第47卷第11期：1519-1526，1546

DOI: 10.3969/j.issn.1003-5060.2024.11.013

作者信息

王思满 $ ^{1,2} $，陶文志 $ ^{2,3} $，孟晶晶 $ ^{2,4} $，喻颖 $ ^{2} $，张勇 $ ^{1} $，冯慧云 $ ^{2,4} $

(1. 安徽建筑大学环境与能源工程学院, 安徽合肥 230601; 2. 中国科学院合肥物质科学研究院智能机械研究所, 安徽合肥 230031; 3. 安徽大学物质科学与信息技术研究院, 安徽合肥 230601; 4. 中国科学技术大学研究生院科学岛分院, 安徽合肥 230031)

摘要和关键词

摘要: 基于黑臭水塘底泥和水构建模拟体系,进行扰动前洗腹处理,探测洗脱转移底泥中底泥存量、容重及细颗粒占比的变化,检测扰动或洗脱前后静置状态下系统中上覆水浊度、溶解氧(dissolved oxygen, DO)及上覆水和底泥间隙水中氮磷质量浓度变化。结果表明:洗脱可有效削减底泥中细颗粒物,削减底泥存量,增加底泥容重,提升上覆水透明度。扰动或洗脱前,上覆水DO低、总氮(total nitrogen, TN)和氨氮高、总磷(total phosphorus, TP)平稳、溶解性总磷(dissolved total phosphorus, DTP)波动上升,底泥间隙水氨氮质量浓度是上覆水中的2倍。扰动处理后水中DO不增反降,但洗脱组水中的DO大幅升高。扰动和洗脱后上覆水DTP质量浓度下降约80%,其他形态氮磷质量浓度在洗脱组的升高幅度显著低于扰动处理,此后63d洗脱组氮磷质量浓度以更快速度、更大幅度下降,最终各处理中 $ NO_{3}^{-}-N $为氮的主要形态。与此同时,扰动后底泥间隙水氮、TP、DTP质量浓度分别降低50%、77%、40%,洗脱后则分别降至10%以下、14%、38%,氨氮仍是间隙水氮的主要形态,但洗脱组氨氮占TN比例低于扰动组。仅扰动处理底泥氨氮、DTP以向上覆水释放为主,而洗脱后则以吸收为主。

关键词: 底泥洗脱；上覆水；间隙水；营养盐；释放通量

Authors

WANG Siman $ ^{1,2} $, TAO Wenzhi $ ^{2,3} $, MENG Jingjing $ ^{2,4} $,

(1. School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China; 2. Institute of Intelligent Machines, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China; 3. Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China; 4. Science Island Branch, Graduate School of University of Science and Technology of China, Hefei 230031, China)

Abstract and Keywords

Abstract: A simulation system was constructed using sediment and water from a black and odorous pond. Disturbance or elution (disturb-and-transfer) was applied on the system. Changes of sediment amount, bulk density, and proportion of fine particles were examined after the treatments. Turbidity and dissolved oxygen (DO) in upper water, as well as nitrogen and phosphorus mass concentrations in both upper water and sediment interstitial water of the system, under static state, were examined before and after the disturbance or elution. The results show that elution can effectively remove fine particles from sediment, reduce sediment amount, increase sediment bulk density, and significantly improve the transparency of upper water. Before disturbance or elution, the upper water had low DO, high total nitrogen (TN) and ammonia nitrogen, stable to

Keywords: sediment elution; upper water; interstitial water; nutritive salt; release flux

基金信息

中国科学院 STS 区域重点资助项目（KFJ-STS-QYZD-173）；水体污染控制与治理科技重大专项资助项目（2017ZX07603005）；安徽省自然科学基金青年资助项目（2108085QD172）和中国科学院合肥物质科学研究院院长基金资助项目（YZJJ2021QN27）

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