Assessment of Phytotoxicity in Untreated and Electrochemically Treated Leachates through the Analysis of Early Seed Growth and Inductively Coupled Plasma-Optical Emission Spectroscopy Characterization

IF 3.1 3区农林科学 Q1 HORTICULTURE

Horticulturae Pub Date : 2024-01-09 DOI:10.3390/horticulturae10010067

Alfredo Martínez-Cruz, M. Rojas-Valencia

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引用次数: 0

Abstract

The treatment of stabilized leachates with high refractory organic matter content, which are over 10 years old, presents a challenge. This study explored the potential of electro-coagulation (EC) and electro-oxidation (EO) treatment systems to address this issue. The objective of this study was to investigate the phytotoxicity of the proposed treatment system on seed growth and examine possible relationships between phytotoxicity results and the characterization of leachates, effluents, soil, and radicles. Phytotoxicity tests were conducted on seeds of Lactuca sativa, Cucumis sativus, and Phaseolus vulgaris, using Inductively Coupled Plasma-Optical analysis. The evolution of organic matter was monitored by fractionating the chemical oxygen demand (COD) and humic substances. The biodegradability index increased from 0.094 in raw leachate to 0.26 and 0.48 with EC and EO, respectively. Removal rates of 82%, 86%, 99%, and 81% were achieved for COD, dissolved organic carbon, color, and ammoniacal nitrogen, respectively. The biodegradable COD increased from 26% in raw leachate to 39% in the EC process and 58% in the EO process effluent. The proposed treatment system successfully broke the aromatic structures of the humic substances present in the raw leachate, thereby increasing the content of biodegradable material. Phytotoxicity tests revealed that the proposed treatment system significantly reduced the phytotoxicity of the generated effluents.

查看原文本刊更多论文

通过早期种子生长分析和电感耦合等离子体-光学发射光谱表征评估未经处理和经电化学处理的沥滤液中的植物毒性

如何处理耐火有机物含量高且超过 10 年的稳定沥滤液是一项挑战。本研究探讨了电凝（EC）和电氧化（EO）处理系统解决这一问题的潜力。本研究的目的是调查拟议处理系统对种子生长的植物毒性，并研究植物毒性结果与沥滤液、污水、土壤和辐射体特征之间可能存在的关系。利用电感耦合等离子体-光学分析法对 Lactuca sativa、Cucumis sativus 和 Phaseolus vulgaris 的种子进行了植物毒性测试。通过对化学需氧量（COD）和腐殖质进行分馏，监测了有机物的演变过程。生物降解指数从原始沥滤液中的 0.094 分别增加到使用 EC 和 EO 后的 0.26 和 0.48。对 COD、溶解有机碳、色度和氨氮的去除率分别达到了 82%、86%、99% 和 81%。可生物降解的 COD 从原始渗滤液中的 26% 增加到 EC 工艺中的 39%，EO 工艺出水中的 58%。拟议的处理系统成功地破坏了原渗滤液中腐殖质的芳香结构，从而增加了可生物降解物质的含量。植物毒性测试表明，拟议的处理系统大大降低了所产生污水的植物毒性。

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来源期刊

Horticulturae HORTICULTURE-

CiteScore

3.50

自引率

19.40%

发文量

998

期刊介绍： Horticulturae (ISSN 2311-7524) is an international, multidisciplinary, peer-reviewed, open access journal focusing on all areas and aspects of temperate to tropical horticulture. It publishes original empirical and theoretical research articles, short communications, reviews, and opinion articles. We intend to encourage scientists to publish and communicate their results concerning all branches of horticulture in a timely manner and in an open venue, after being evaluated by the journal editors and randomly selected independent expert reviewers, so that all articles will never be judged in relation to how much they confirm or criticize the opinions of other researchers.