The role of biochar and green compost amendments in the adsorption, leaching, and degradation of sulfamethoxazole in basic soil

被引：6

作者：

García-Delgado C. ^{[1
]}

Delgado-Moreno L. ^{[2
]}

Toro M. ^{[1
]}

Puñal M. ^{[1
]}

Martín-Trueba M. ^{[1
,2
]}

Eymar E. ^{[2
]}

Ruíz A.I. ^{[1
]}

机构：

[1] Department of Geology and Geochemistry, Universidad Autónoma de Madrid, Madrid

[2] Department of Agricultural Chemistry and Food Sciences, Universidad Autónoma de Madrid, Madrid

来源：

Chemosphere | 2023年 / 344卷

关键词：

Antibiotics; Emerging pollutants; Organic amendments; Organic matter; Sulfonamides;

D O I：

10.1016/j.chemosphere.2023.140364

中图分类号：

学科分类号：

摘要：

The fate of the antibiotic sulfamethoxazole in amended soils remains unclear, moreover in basic soils. This work aimed to assess the adsorption, leaching, and biodegradation of sulfamethoxazole in unamended and biochar from holm oak pruning (BC)- and green compost from urban pruning (CG)-amended basic soil. Adsorption properties of the organic amendments and soil were determined by adsorption isotherms of sulfamethoxazole. The leachability of this antibiotic from unamended (Soil) and BC- (Soil + BC) and GC- (Soil + GC) amended soil was determined by leaching columns using water as solvent up to 250 mL. Finally, Soil, Soil + BC, and Soil + GC were spiked with sulfamethoxazole and incubated for 42 days. The degradation rate and microbial activity were periodically monitored. Adsorption isotherms showed poor adsorption of sulfamethoxazole in unamended basic soil. BC and CG showed good adsorption capacity. Soil + BC and Soil + GC increased the sulfamethoxazole adsorption capacity of the soil. The low sulfamethoxazole adsorption of Soil produced quick and intense sulfamethoxazole leaching. Soil + BC reduced the sulfamethoxazole leaching, unlike to Soil + GC which enhanced it concerning Soil. The pH of adsorption isotherms and leachates indicate that the anion of sulfamethoxazole was the major specie in unamended and amended soil. CG enhanced the microbial activity of the soil and promoted the degradability of sulfamethoxazole. In contrast, the high adsorption and low biostimulation effect of BC in soil reduced the degradation of sulfamethoxazole. The half-life of sulfamethoxazole was 2.6, 6.9, and 11.9 days for Soil + GC, Soil, and Soil + BC, respectively. This work shows the benefits and risks of two organic amendments, BC and GC, for the environmental fate of sulfamethoxazole. The different nature of the organic carbon of the amendments was responsible for the different effects on the soil. © 2023 The Authors

引用

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