Biogas slurry-derived dissolved organic matter inhibited oxytetracycline adsorption by tropical agricultural soils

被引：1

作者：

Chen, Hui ^{[1
]}

Yin, Lingfei ^{[1
]}

He, Yuan ^{[1
]}

Bai, Liangtai ^{[1
]}

Wu, Yuejun ^{[1
]}

Zhao, Yuanyuan ^{[1
]}

Reguyal, Febelyn ^{[2
]}

Sarmah, Ajit K. ^{[2
]}

Yang, Xing ^{[1
]}

Ge, Chengjun ^{[1
]}

Wang, Hailong ^{[3
,4
]}

机构：

[1] Hainan Univ, Sch Environm Sci & Engn, Key Lab Agroforestry Environm Proc & Ecol Regulat, Haikou 570228, Peoples R China

[2] Univ Auckland, Fac Engn, Dept Civil & Environm Engn, Pribate Bag 92019, Auckland 1142, New Zealand

[3] Foshan Univ, Sch Environm & Chem Engn, Foshan 528000, Peoples R China

[4] Guangdong Acad Sci, Inst Ecoenvironm & Soil Sci, Guangdong Prov Key Lab Integrated Agroenvironm Pol, Guangzhou 510650, Peoples R China

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2024年 / 948卷

基金：

海南省自然科学基金; 中国国家自然科学基金;

关键词：

Antibiotic; Dissolved organic carbon; Arable soil; Adsorption mechanism; Waste management; VETERINARY ANTIBIOTICS; WASTE-WATER; SORPTION; TETRACYCLINE; FLUORESCENCE; MANURE; CIPROFLOXACIN; ENROFLOXACIN; MECHANISMS; DESORPTION;

D O I：

10.1016/j.scitotenv.2024.174785

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The increasing presence of oxytetracycline (OTC) in agricultural soils has raised global environmental concerns. We investigated the environmental behavior and fate of OTC in two types of tropical agricultural soils, focusing on the impact of dissolved organic matter (DOM) from biogas slurry. Techniques such as three-dimensional excitation-emission matrix fluorescence spectroscopy (3D-EEM), Fourier Transform Infrared (FTIR), X-ray photoelectron spectroscopy (XPS), and Ultraviolet-visible spectrophotometer (UV - vis) were used to explore the adsorption mechanisms. Our findings revealed that biogas slurry-derived DOM decreased the OTC adsorption on soils and extended the time to reach adsorption equilibrium. Specifically, the equilibrium adsorption of OTC by the two soils decreased by 19.41 and 15.32 %, respectively. These adsorption processes were effectively modelled by Elovich, intraparticle diffusion, linear, and Freundlich thermodynamic models. Thermodynamic parameters suggested that OTC adsorption onto soils was spontaneous and endothermic, with competitive interactions between biogas slurry-derived DOM and OTC molecules intensifying at higher DOM concentrations. The adsorption mechanisms were governed by both physical and chemical processes. Furthermore, the presence of Ca 2+ and Na + ions significantly inhibited OTC adsorption. These insights advanced our understanding of the fate and risk of OTC in soil environments influenced by DOM, contributing to more informed agricultural and environmental management practices.

引用

页数：11

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