数字农科院2.0

Small microplastic particles promote tetracycline and aureomycin adsorption by biochar in an aqueous solution

文献类型： 外文期刊

作者： Zhao, Shuwen;Zhang, Chuchen;Zhang, Qianru;Huang, Qilan

作者机构：

关键词： Biochar;Antibiotic;Microplastic;Interaction;Mechanism

期刊名称： JOURNAL OF ENVIRONMENTAL MANAGEMENT

ISSN： 0301-4797

年卷期： 2024 年 349 卷

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： Biochar (BC) has been used to remove antibiotics from wastewater. Microplastics are emerging contaminants of wastewater. The capacities of microplastics for adsorbing antibiotics and the effects of microplastics of different types and particle sizes on antibiotic adsorption by BC have not been studied. Here, adsorption isotherm and kinetics experiments were performed to investigate tetracycline and aureomycin adsorption to polyvinyl chloride particles with diameters of 10, 100, 500, and 2000 mu m, polylactic acid particles with diameters of 30, 100, 500, and 2000 mu m (PLA30, PLA100, PLA500, and PLA2000, respectively), and wheat straw BC. The highest tetra-cycline adsorption capacity (25.00 mg g-1) was found for a PLA30 + BC. The tetracycline adsorption capacities of the other microplastic particles were 20.44-24.57 mg g-1. The highest aureomycin adsorption capacity (39.50 mg g-1) was found for 10 mu m polyvinyl chloride particles and BC. The aureomycin adsorption capacities of the other microplastic particles were 32.21-38.42 mg g-1. The tetracycline adsorption capacities were 13.69%, 6.28%, 5.49%, and 4.54% higher for PLA30 + BC, PLA100 + BC, PLA500 + BC, and PLA2000 + BC, respectively, than for only BC. This may have been because there were more sites available per unit mass of microplastic for adsorbing tetracycline and dissolved organic carbon on small microplastic particles than large microplastic particles. The results indicated that microplastics can adsorb antibiotics and increase the amounts of antibiotics adsorbed by BC. Therefore, it is essential to consider potential interactions between BC and micro-plastics when BC is used to remove antibiotics from wastewater.

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