城市垃圾堆肥改良农用土壤中某些重金属的流动性可能对人类健康造成的风险

Bolaji Tomori Wasiu, Oluwasiji Olorunfemi Kehinde, Olanrewaju Onibon Vincent, Oyelekan Oyewunmi Tolulope
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摘要

在农业实践中使用有机堆肥进行土壤改良可能会转移重金属,从而影响健康。本研究旨在调查城市堆肥改良土壤中某些重金属的可能迁移情况。实验地块(250 平方米)被分成四等份,每份交替添加城市堆肥并放置 5 周。堆肥、堆肥改良土壤和未改良土壤的土壤理化特征均通过标准程序获得,单一提取物通过二乙烯三胺五乙酸(DTPA)方案获得,地球化学形式通过参考社区局(BCR)顺序提取法获得。提取物使用原子吸收分光光度计(Buck Scientific Model 210)进行分析。在这项研究中,用堆肥改良土壤后,土壤的各种物理化学性质发生了显著变化,其中 pH 值(16.72%)、电导率(EC,1509.63%)、有机碳(OC,100.24%)、有机质(OM,24.43%)、有机氮(ON,24.41%)、钾(K,1950.63%)、钠(Na,325.03%)、钙(Ca,67.93%)和镁(Mg,112.92%)。虽然金属的浓度在添加剂的作用下略有改变,但研究表明,使用有机堆肥进行土壤改良是膳食中重金属的潜在来源。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Possible human health risk of selected heavy metals mobility from municipal waste compost amended agricultural soil
Use of organic compost in soil amendment in agricultural practice may tend to transfer heavy metals and can be a health concern. This study aims to investigate the possible mobilization of selected heavy metals from municipal compost amended soil. Experimental plots (250 m 2 ) were divided into four equal portions and alternate portions were amended with municipal compost and left for 5 weeks. Soil physicochemical characteristics for compost, compost amended soil, and unamended soil were obtained by standard procedures, single extraction was obtained by diethylenetriamine penta acetic acid (DTPA) protocol, and the geochemical forms were obtained by Bureau Community of Reference (BCR) sequential extraction method. The extracts were analyzed using Atomic Absorption Spectrophotometer (Buck Scientific Model 210). In this study, the amendment of soil with compost resulted in significant changes in various physico-chemical properties, with notable percentage increases: pH (16.72%), electrical conductivity (EC, 1509.63%), organic carbon (OC, 100.24%), organic matter (OM, 24.43%), organic nitrogen (ON, 24.41%), potassium (K, 1950.63%), sodium (Na, 325.03%), calcium (Ca, 67.93%), and magnesium (Mg, 112.92%). Although, the concentrations of metals were marginally altered by amendments, the study has revealed soil amendment with organic compost a potential source of heavy metals in diet.
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