Separation of atrazine from water through thin-film composite membranes: influence of salts and surfactants

Abstract

A B S T R A C TThe thin-film composite membrane is aptly named as thin polyamide layer on the asymmetric polysulfone membrane. These membranes have salt rejection abilities, and the order is NaCl > CaCl 2 . Addition of NaCl increases (17.39% for 500 mg/L for Memb-II), whereas CaCl 2 decreases (5.94% for 500 mg/L for Memb-II) atrazine separation. Surfactant-mediated filtrations showed mixed results. Sodium lauryl sulfate (SLS) results better atrazine separation. SLS (200 mg/L) increases 29.72% separation for Memb-II. Contrary to SLS, Cetyl trimethyl ammonium bromide shows little negative influence (10.91%) and for Triton-X-100 (19.3%) it shows more deterioration effect for the same membrane, keeping the same concentration.

Impact of Solute Properties and Water Matrix on Nanofiltration of Pesticides

“…A recent work by Karimi et al successfully improved atrazine separation by modifying nanofiltration membranes with piperazine. Saxena et al found that addition of sodium chloride salt in water resulted in better atrazine separation using thin‐film composite membranes, but the reverse trend was observed with the addition of calcium chloride. Meanwhile, Acero et al , who compared the retention of atrazine from ultrapure water and a municipal secondary effluent using commercial nanofiltration membranes, found a slight increase of atrazine retention when it was dissolved in municipal secondary effluent.…”

On the differences of separation of hazardous catechol and resorcinol through tailor-made thin film composite (TFC) membranes

“…endosulfan membrane [24]). 48 The present study targets the remediation of two dihydroxy 49 aromatic compounds, namely catechol and resorcinol, through 50 membranes. They are extensively used in textile, paper and pulp, 51 steel, petrochemical, petroleum refinery, rubber, dye, plastic, 52 pharmaceutical, cosmetic etc.…”

Influence of solution pH on degradation of atrazine during UV and UV/H2O2 oxidation: kinetics, mechanism, and degradation pathways

“…8 In order to ensure drinking water quality, European countries have adopted a maximum contaminant level (MCL) of 1.0 mg L À1 for ATZ, and the United States Environmental Protection Agency (US EPA) set a drinking water limit of 3 mg L À1 . 9 Due to the inefficiency of conventional water/wastewater treatment processes in removing ATZ, 10,11 comprehensive efforts have been made to develop effective physical, chemical and biological methods, such as adsorption, 12,13 membrane separation 14,15 and oxidation processes. [16][17][18][19] The most popular and environmentally friendly oxidation process is photo-oxidation, and numerous studies have reported the photo-degradation of ATZ in water and wastewaters.…”