Research Article On the Behavior of Newly Synthesized Functionalized Imidazolium-Based Ionic Liquids for Highly Efficient Extraction and Separation of Pirimicarb from Orchard Real Wastewater Sana Zulfiqar , 1 Uzaira Rafique, 1 M. Javed Akhtar, 2 and Hesham Hamad 3 1 Department of Environmental Sciences, Fatima Jinnah Women University, Rawalpindi, Pakistan 2 Pakistan Institute of Nuclear Science and Technology, Nilore, Pakistan 3 Fabrication Technology Research Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications (SRTA-City), Alexandria 21934, Egypt Correspondence should be addressed to Sana Zulfiqar; sanazulfiqar@fjwu.edu.pk and Hesham Hamad; hhamad@chem.uw.edu.pl Received 8 December 2021; Revised 12 January 2022; Accepted 13 January 2022; Published 17 February 2022 Academic Editor: Tony Hadibarata Copyright © 2022 Sana Zulfiqar et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The presence of pirimicarb compounds as pollutants in orchard wastewater has sparked rising worries about their detrimental impacts on the ecosystem and human health, and their removal is critical for Pakistan’s aquatic environment. It not only contaminates fruit, but it also leaches into the soil and contaminates groundwater. However, there is little data on the effective removal of pirimicarb from orchard wastewater. The main purpose of this study is to create a novel family of functionalized imidazolium-based ionic liquids (ILs) using a simple chemical process, which will be utilized for the first time to extract pirimicarb from orchard wastewater in an efficient, cost-effective, and environmentally acceptable manner. FTIR, SEM, XRD, TGA, BET, and 1 H NMR spectroscopy were used to characterize the functionalized samples. The impact of the IL substituent on the separation capacity was studied. In addition, the extraction and separation of pirimicarb from orchard wastewater were investigated under a variety of conditions (time, concentration, and temperature) in order to better understand the adsorption behaviors of distinct ILs in an aqueous solution. The adsorption equilibrium was reached in 30 minutes, and the maximum removal of pirimicarb was achieved utilizing the synthesized [C 2 im][C 3 H 6 NH 2 ]Br - , according to the data. The pseudo-first- order model and the Langmuir model both suit well with the adsorption mechanism of pirimicarb with very good adsorptive capacities. Thermodynamic analyses indicated spontaneous, endothermic, and entropy-driven adsorption processes. The synthesized imidazolium-based ILs have good regeneration capability and recycling at least for six adsorption-desorption runs and have also been used to successfully detect pirimicarb orchard wastewater samples. The superior safety of the proposed method nominates it as a promising future strategy for pollution prevention. Consequently, this work has proven that the pirimicarb adsorption to various imidazolium-based ILs was dependent on the structures of the produced imidazolium-based ILs, which specifies its potential for practical applications in water pollutant removal and environmental remediation. 1. Introduction The use of pesticides is critical for the management of pests and insect-borne diseases, which leads to an increased food supply. Although pesticides are beneficial to agriculture, their rising use has had a negative impact on humans and the environment as a whole. Because of its low persistence and great efficacy, the carbamate pesticide family has been widely used in the pest control of vegetable crops. The US Environmental Protection Agency (EPA) considers carba- mate herbicide to be one of the most harmful contaminants in the environment [1, 2]. Because it is highly soluble in aqueous mediums and circulates into surface and groundwa- ter through soil leaks, this family is poisonous and poses a threat to all living species [3]. In particular, pirimicarb (2-dimethylamino-5,6- dimethylpyrimidin-4-yldimethylcarbamate) is an important substituted N, N-dimethylcarbamate insecticide, and it has Hindawi Adsorption Science & Technology Volume 2022, Article ID 2441212, 14 pages https://doi.org/10.1155/2022/2441212