揭示通过EDTA-Fenton-Like系统加强堆肥腐殖质化和镉修复的后处理机制。

IF 8 1区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Science of the Total Environment Pub Date : 2025-01-10 DOI:10.1016/j.scitotenv.2024.178236

Hongjuan Jiang , Zhigang Yi , Yaoning Chen , Yuanping Li , Li Chen , Jun Wang , Yaoqin Nie , Mengwei Luo , Qianruyu Wang , Wei Zhang , Yanting Wu , Guangming Zeng

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引用次数: 0

摘要

本研究通过研究超纯水、柠檬酸和乙二胺四乙酸二钠（EDTA）三种后处理对堆肥腐殖质化和镉（Cd）修复的影响。结果表明，EDTA后处理通过促进由稻草和河流沉积物组成的堆肥中的EDTA- fenton样系统来修复cd污染的沉积物，从而显著增强腐殖化。EDTA处理后腐殖质和腐殖酸浓度分别达到66.30 g/kg和30.40 g/kg， Cd含量和生物利用度分别降低75.02%和9.76%。此外，平行因子分析显示腐植酸中有两个不同的组分，二维相关光谱分析显示腐植酸中的多糖和羧基优先与Cd结合。综上所述，本研究为EDTA后处理促进堆肥腐植酸化和Cd修复提供了一条有前景的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Unraveling the mechanisms of post-treatment to enhance humification and Cd remediation in compost through EDTA-Fenton-Like systems

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Unraveling the mechanisms of post-treatment to enhance humification and Cd remediation in compost through EDTA-Fenton-Like systems

This study aimed to enhance humification and cadmium (Cd) remediation in compost by investigating the effects of three post-treatments: ultrapure water, citric acid, and ethylenediaminetetraacetic acid disodium (EDTA). The results revealed that the EDTA post-treatment significantly enhanced humification by facilitating an EDTA-Fenton-like system within compost comprising rice straw and river sediment to remediate Cd-contaminated sediment. EDTA post-treatment not only promoted humic substances and humic acid concentrations of up to 66.30 g/kg and 30.40 g/kg, respectively, but also led to a reduction in the Cd content and bioavailability factor by 75.02 % and 9.76 %, respectively. In addition, parallel factor analysis revealed two distinct components, while two-dimensional correlation spectroscopy showed that the polysaccharides and carboxyl groups in humic acid were preferentially bound to Cd. Overall, this study proposes a promising approach for enhancing humification and Cd remediation in compost by the EDTA post-treatment.

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来源期刊

Science of the Total Environment 环境科学-环境科学

CiteScore

17.60

自引率

10.20%

发文量

8726

审稿时长

2.4 months

期刊介绍： The Science of the Total Environment is an international journal dedicated to scientific research on the environment and its interaction with humanity. It covers a wide range of disciplines and seeks to publish innovative, hypothesis-driven, and impactful research that explores the entire environment, including the atmosphere, lithosphere, hydrosphere, biosphere, and anthroposphere. The journal's updated Aims & Scope emphasizes the importance of interdisciplinary environmental research with broad impact. Priority is given to studies that advance fundamental understanding and explore the interconnectedness of multiple environmental spheres. Field studies are preferred, while laboratory experiments must demonstrate significant methodological advancements or mechanistic insights with direct relevance to the environment.