富里酸强化土著菌修复黑臭水体及其淤泥质的无害化处理

本数据集围绕富里酸（FA）强化土著菌修复黑臭水体及淤泥无害化处理，构建了一套多机制协同体系。首先通过非均相铁催化过硫酸盐体系优化淤泥固液分离性能，分析含水率、毛细吸水时间及生物多聚物构象变化，揭示脱水机制；同时探究洞庭湖黑臭淤泥中汞甲基化与铁硫循环、溶解氧、有机碳的关联性，明确FA对甲基汞生成的抑制作用。在污染控制方面，开发了g-C3N4@Bi2MoO6@AgI漂浮海绵，结合自由基淬灭实验验证其可见光催化去除铜绿微囊藻效能，并耦合菌藻生物膜反应器提升COD、TP、NH4+-N去除效率。此外，羟基氧化铁介导的胞外电子传递显著强化沉积物微生物燃料电池的固磷能力，微生物网络分析揭示了磷形态转化与电子传递的偶联机制。基于生物膜电极反应器，研究证实FA通过促进EPS分泌、调控反硝化功能基因及电子传递增强脱氮性能。针对底泥重金属污染，温敏nBC@PA水凝胶通过吸附-热脱附循环有效控制Cu(II)释放，结合EPS组分分析阐明其界面作用机制。最后，对比FA改性纳米羟基磷灰石的Cu(II)吸附特性，证实FA修饰可优化材料结合位点密度。该数据集为黑臭水体修复提供了从污染物定向转化、藻类抑制到底泥资源化的全链条解决方案，凸显FA在调控微生物代谢及污染物固定中的核心作用，为生态工程化应用提供理论支撑。This dataset is centered on a multi-mechanism collaborative system for the remediation of black and malodorous water bodies and the harmless treatment of sediment by enhancing the performance of indigenous bacteria with fulvic acid (FA). First, the heterogeneous iron-catalyzed persulfate system was applied to optimize the solid-liquid separation performance of sediment. By analyzing moisture content, capillary suction time (CST), and conformational changes of biopolymers, the dewatering mechanism was revealed. Meanwhile, the correlations between mercury methylation and iron-sulfur cycles, dissolved oxygen (DO), and organic carbon (OC) in the black and malodorous sediment from Dongting Lake were investigated, and the inhibitory effect of FA on methylmercury generation was clarified. For pollution control, a g-C3N4@Bi2MoO6@AgI floating sponge was developed. Its visible-light photocatalytic efficiency in removing Microcystis aeruginosa was verified via radical quenching experiments, and coupling it with an algal-bacterial biofilm reactor improved the removal efficiency of chemical oxygen demand (COD), total phosphorus (TP), and ammonia nitrogen (NH4+-N). Furthermore, iron oxyhydroxide-mediated extracellular electron transfer (EET) significantly enhanced the phosphorus immobilization capacity of sediment microbial fuel cells (SMFCs). Microbial network analysis revealed the coupling mechanism between phosphorus speciation transformation and electron transfer. Based on biofilm electrode reactors, studies confirmed that FA enhanced nitrogen removal performance by promoting extracellular polymeric substances (EPS) secretion, regulating denitrifying functional genes, and adjusting electron transfer. Aiming at heavy metal pollution in sediment, a temperature-responsive nBC@PA hydrogel effectively controlled the release of Cu(II) via adsorption-thermal desorption cycles. Combined with EPS component analysis, its interfacial interaction mechanism was elucidated. In addition, comparing the Cu(II) adsorption characteristics of FA-modified nano-hydroxyapatite (nHAP) confirmed that FA modification can optimize the binding site density of the material. This dataset provides a full-chain solution for the remediation of black and malodorous water bodies, ranging from targeted pollutant transformation, algae inhibition to sediment resource utilization, highlighting the core role of FA in regulating microbial metabolism and pollutant immobilization, and providing theoretical support for ecological engineering applications.

搜集汇总

背景与挑战

背景概述

该数据集围绕富里酸强化土著菌修复黑臭水体及淤泥无害化处理，构建了多机制协同体系，涉及汞甲基化控制、藻类去除和脱氮性能提升等技术。研究通过材料优化和微生物调控，为污染物定向转化和底泥资源化提供了全链条解决方案，凸显了富里酸在生态工程应用中的核心作用。