Removal of Pesticides from Water by Adsorption on Activated Carbon Prepared from Invasive Plants

IF 4.3 3区材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC ACS Applied Electronic Materials Pub Date : 2024-10-30 DOI:10.1007/s11270-024-07582-8

Tereza Motúzová, Ivan Koutník, Martina Vráblová

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Abstract

Pesticide pollution of surface water is a serious global problem. This research was focused on the monitoring of pesticides in surface waters and their subsequent removal using adsorption on activated carbon (AC). Based on the monitoring, four pesticides—acetamiprid, diethyltoluamide, thiacloprid and thiamethoxam—occurred in higher concentrations in all sampling points. Invasive plants occurring near monitored water bodies, Reynoutria japonica (RJ) and Impatiens glandulifera (IG) were used for the preparation of activated carbon with an activating agent (H₃PO₄ and NaOH) using microwave pyrolysis. The prepared AC was subsequently used for adsorption of the above-mentioned pesticides. The prepared AC was characterized by Brunauer–Emmett–Teller analysis, elemental analysis, Fourier transform infrared spectroscopy and scanning electron microscopy. Individual AC types showed different effects for different pesticides. The maximum adsorption capacity calculated from the Langmuir model was 18.30 mg g⁻¹ for thiacloprid on H₃PO₄-activated AC from I. glandulifera.

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用入侵植物制备的活性炭吸附去除水中的农药

地表水的农药污染是一个严重的全球性问题。这项研究的重点是监测地表水中的农药，并利用活性炭（AC）的吸附作用去除农药。根据监测结果，四种农药--啶虫脒、乙酰甲胺磷、噻虫啉和噻虫嗪--在所有采样点的浓度都较高。利用监测水体附近的入侵植物 Reynoutria japonica (RJ) 和 Impatiens glandulifera (IG)，采用微波热解法制备活性炭，并加入活化剂（H3PO4 和 NaOH）。制备的活性炭随后用于吸附上述农药。制备的活性炭通过布鲁瑙尔-艾美特-泰勒分析、元素分析、傅立叶变换红外光谱和扫描电子显微镜进行了表征。不同类型的 AC 对不同的农药表现出不同的效果。根据 Langmuir 模型计算，噻虫啉在 H3PO4 活化的 I. glandulifera AC 上的最大吸附容量为 18.30 mg g-1。

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