Should releasing risk of sulfamethoxazole in bound-residual fraction of biochar-soil systems be neglected?

IF 9.7 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING

Bioresource Technology Pub Date : 2025-02-01 Epub Date: 2024-12-02 DOI:10.1016/j.biortech.2024.131921

Mingyang Sun, Xiaoyue Zhang, Jiaping Li, Yuyu Hu, Dehao Guo, Guanghuan Cheng

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Abstract

Bound residual (BR) fraction typically represents the "endpoint" of soil pollution risk assessment and remediation. However, it remains unclear whether the BR fraction of sulfamethoxazole (SMX) still presents a release risk after immobilized by biochar. Therefore, the SMX migration rate in different fractions were quantified. Results revealed that there are three extractable fractions of SMX in biochar-soil systems, allowing the migration of SMX among these various fractions. 1.0 % biochar could increase 8.5 %∼14.1 % BR fraction and 17.9 %∼36.9 % non-extractable fraction, respectively. Model simulations and Sobol Global Sensitivity Analysis results revealed that migration of SMX from BR fraction to labile fraction or stably-adsorbed fraction significantly affects overall fraction migration, suggesting BR fraction still poses a potential release risk. When considering the BR fraction, the half-life of SMX extended to 93.8 ∼ 132.0 days. Thus, the potential release risk of SMX in the BR fraction should not be overlooked when applying biochar for soil remediation.

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磺胺甲恶唑在生物炭-土壤系统结合残余部分的释放风险应该被忽视吗？

结合残余（BR）分数通常是土壤污染风险评估和修复的“终点”。然而，磺胺甲恶唑（SMX）的BR组分经生物炭固定化后是否仍存在释放风险尚不清楚。因此，我们量化了SMX在不同馏分中的迁移速率。结果表明，SMX在生物炭-土壤系统中有三种可提取组分，允许SMX在这些不同组分之间迁移。1.0 %的生物炭可以分别提高8.5 % ~ 14.1 %的BR分数和17.9 % ~ 36.9 %的不可提取分数。模型模拟和Sobol Global Sensitivity Analysis结果显示，SMX从BR馏分向不稳定馏分或稳定吸附馏分的迁移显著影响了总体馏分迁移，表明BR馏分仍存在潜在的释放风险。如果考虑BR部分，SMX的半衰期延长到93.8 ~ 132.0 天。因此，应用生物炭进行土壤修复时，BR组分中SMX的潜在释放风险不容忽视。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.