Department of Nanotechnology, Sri Guru Granth Sahib World University, 140406, Fatehgarh Sahib, Punjab, India.
Department of Biotechnology, Chandigarh University, Gharuan, Mohali, 140413, Punjab, India.
Environ Monit Assess. 2023 Aug 17;195(9):1056. doi: 10.1007/s10661-023-11662-3.
The recovery of organophosphate pesticides (OPPs) from aqueous solutions is imperative considering their agricultural and environmental implications. Among various mitigation approaches used for OPPs' removal, adsorption offers many advantageous features for OPPs abatement owing to its benign nature, cost-effective processing, and non-requirement of excessive equipment. This research describes the adsorptive removal of three organophosphate pesticides (OPPs) namely chlorpyrifos (CPF), methyl parathion (MP), and malathion (MAL) by HKUST-1 (HKUST = Hong Kong University of Science and Technology) metal-organic framework (MOF). The synthesis of HKUST-1 MOFs was confirmed by various spectroscopic and microscopic techniques. The adsorption kinetics was systematically investigated by varying three parameters to include solution pH, contact time, and initial pesticide concentration. Among all the three pesticides, HKUST-1 showed enhanced removal of CPF in terms of pH, resulting in an adsorption capacity of 1.82 mg·g. However, under the effect of contact time at 60 min, the adsorption capacity of HKUST-1 for PM, MAL, and CPF were computed to be 1.83, 1.79, and 0.44 mg·g, respectively. Besides, HKUST-1 showed a remarkable performance towards adsorptive removal of MAL (14.01 mg·g at 10 mg·L concentration) with linear increase in adsorption capacity as the function of initial pesticide concentration. The MOFs were also able to retain ca. 50% of their adsorption efficiency over the course of five cycles of adsorptive removal of CP. In the future, a comprehensive data table showing the performance of various MOFs against various OPPs can be constructed on the basis of parameters used in this study.
考虑到有机磷农药 (OPPs) 在农业和环境方面的影响，从水溶液中回收它们是至关重要的。在用于去除 OPPs 的各种缓解方法中，吸附由于其良性性质、具有成本效益的处理和不需要过多设备而具有许多有利的特点，可用于去除 OPPs。本研究描述了通过 HKUST-1（香港科技大学的简称）金属有机骨架 (MOF) 吸附去除三种有机磷农药 (OPPs)，即毒死蜱 (CPF)、甲基对硫磷 (MP) 和马拉硫磷 (MAL)。通过各种光谱和显微镜技术证实了 HKUST-1 MOFs 的合成。通过改变三个参数，包括溶液 pH、接触时间和初始农药浓度，系统地研究了吸附动力学。在所有三种农药中，HKUST-1 在 pH 方面表现出对 CPF 的去除增强，吸附容量为 1.82mg·g。然而，在 60 分钟接触时间的作用下，HKUST-1 对 PM、MAL 和 CPF 的吸附容量分别计算为 1.83、1.79 和 0.44mg·g。此外，HKUST-1 对 MAL（在 10mg·L 浓度下为 14.01mg·g）的吸附去除表现出显著的性能，吸附容量随初始农药浓度的线性增加而增加。MOFs 在 CP 的吸附去除的五个循环过程中也能够保持约 50%的吸附效率。在未来，可以根据本研究中使用的参数，构建一个包含各种 MOFs 对各种 OPPs 的性能的综合数据表。
