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首页> 外文期刊>Journal of environmental science and health >Removal of ethylenthiourea and 1,2,4-triazole pesticide metabolites from water by adsorption in commercial activated carbons
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Removal of ethylenthiourea and 1,2,4-triazole pesticide metabolites from water by adsorption in commercial activated carbons

机译：通过吸附在商业活性炭中去除水中的乙撑硫脲和1,2,4-三唑农药代谢物

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摘要

This study evaluated the adsorption capacity of ethylenthiourea (ETU) and 1H-1,2,4-triazole (1,2,4-T) for two commercial activated carbons: charcoal-powdered activated carbon (CPAC) and bovine bone-powdered activated carbon (BPAC). The tests were conducted at a bench scale, with ETU and 1,2,4-T diluted in water, for isotherm and adsorption kinetic studies. The removal of the compounds was accompanied by a total organic carbon (TOC) analysis and ultraviolet (UV) reduction analysis. The coals were characterized by their surface area using nitrogen adsorption/desorption, by a scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM/EDS) and by a zero charge point analysis (pHpcz). The results showed that adsorption kinetics followed a pseudo-second-order model for both coals, and the adsorption isotherms for CPAC and BPAC were adjusted to the Langmuir and Freundlich isotherms, respectively. The CPAC removed approximately 77％ of the ETU and 76％ of the 1,2,4-T. The BPAC was ineffective at removing the contaminants.
机译：这项研究评估了乙撑硫脲（ETU）和1H-1,2,4-三唑（1,2,4-T）对两种商业活性炭的吸附能力：木炭粉状活性炭（CPAC）和牛骨粉状活性炭碳（BPAC）。测试是在实验室规模下进行的，将ETU和1,2,4-T用水稀释，用于等温线和吸附动力学研究。化合物的去除伴随着总有机碳（TOC）分析和紫外线（UV）还原分析。通过使用氮吸附/解吸的表面积，通过扫描电子显微镜和能量色散X射线光谱法（SEM / EDS）以及通过零电荷点分析（pHpcz）来表征煤。结果表明，两种煤的吸附动力学遵循伪二级模型，分别将CPAC和BPAC的吸附等温线调整为Langmuir和Freundlich等温线。 CPAC删除了约77％的ETU和76％的1,2,4-T。 BPAC不能有效去除污染物。

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