Removal of multiple pesticide residues from water by low-pressure thin-film composite membrane
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ORIGINAL ARTICLE
Removal of multiple pesticide residues from water by low‑pressure thin‑film composite membrane Ayan Mukherjee1 · Romil Mehta2 · Soumen Saha3 · A. Bhattacharya2 · Pabitra Kumar Biswas1 · Ramen Kumar Kole3 Received: 10 May 2020 / Accepted: 2 October 2020 / Published online: 23 November 2020 © The Author(s) 2020
Abstract The study evaluated removal efficiency of 43 pesticides from water by thin-film composite polyamide membrane indigenously prepared by interfacial polymerization of 1,3-phenylenediamine and 1,3,5 trimesoyl chloride coated on asymmetric polysulfone support. Membrane performance was evaluated by gas and liquid chromatography mass spectroscopy determination of multiple pesticides remaining in feed and permeated water following the application of pesticides each @ 0.02, 0.05, and 0.10 mg/L in de-ionized water. The membrane was most efficient in the rejection of persistent organochlorine insecticides, viz. endosulfans (100%), dichlorodiphenyltrichloroethane (95%), and hexachlorocyclohexane (92%). Out of 43 selected pesticides, 33 were removed by > 80%. Size exclusion mass transfer played a significant role for molecules to pass through the membrane as observed for endosulfan isomers, endosulfan sulphate, and difenoconazole with molecular weight > 400. Pesticide rejection was also related to hydrophobicity (Log P). Hydrophobic pesticides with log P > 4.5 were rejected by > 80%, while monocrotophos with less hydrophobicity (log P = − 0.22) exhibited poor rejection (38%). Water flux decreased with an increase in pesticide concentration. The process of pesticide filtration was optimized at 200 psi. The results indicated the potential of the membrane to remove pesticides from water. Keywords Composite membrane · Mass spectrometry · Pesticide removal · Water
Introduction The aquatic environment is contaminated by various organic and inorganic substances like pesticides, pharmaceuticals, etc., originating from industrial, municipal, or agricultural activities (Yadav et al. 2015; Jabali et al. 2018). During the Electronic supplementary material The online version of this article (https://doi.org/10.1007/s13201-020-01315-y) contains supplementary material, which is available to authorized users. * Ramen Kumar Kole [email protected] 1
Department of Soil Science & Agricultural Chemistry, Institute of Agriculture, Palli-Siksha Bhavana, Visva Bharati, Sriniketan, Birbhum, West Bengal 731236, India
2
Membrane Science and Separation Technology Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSMCRI), Gijubhai Badheka Marg, Bhavnagar, Gujarat 364002, India
3
Department of Agricultural Chemicals, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya (BCKV), Mohanpur, Nadia, West Bengal 741252, India
last few decades, pesticides are being used heavily in agriculture to ensure high crop yield. However, the continuous and indiscriminate use of pesticides, their misuse, spillage, improper storage, handling, and disposal has resulted in the presence of their resid
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