Pretreatment of agriculture field water for improving membrane flux during pesticide removal

Abstract

Pretreatment of feed water to improve membrane flux during filtration of agriculture field water containing substituted phenyl urea pesticide diuron has been reported. Laboratory-made reverse osmosis membrane was used for filtration. Preliminary experiments were conducted with model solution containing natural organic matter extracted from commercial humic acids, divalent ions Ca 2? , Mg 2?. Membrane fouling was characterized by pure water flux decline, change in membrane hydrophilicity and infrared spectroscopy. Natural organic matter present in field water causes severe membrane fouling. The presence of divalent cations further aggravated fouling. Use of ethylenediaminetetraacetic acid (EDTA) and polyacrylic acids (PAA) in feed resulted in the decrease in membrane fouling. Pretreatment of field water is a must if it is contaminated with microorganism having membrane fouling potential. Feed water pretreatment and use of PAA restricted membrane fouling to 16 % after 60 h of filtration. Membrane permeate flux decline was maximum at the first 12 h and thereafter remained steady at around 45-46 lm-2 h-1 till the end of 60 h. Diuron rejection remained consistently greater than 93 % throughout the experiment. Diuron rejection was found to be unaffected by membrane fouling.

Performance of an Integrated Membrane Process with Electrochemical Pre-Treatment on Poultry Slaughterhouse Wastewater Purification

“…TSS removal in feed water prior to a membrane filtration treatment process is important to improve membrane flux [ 35 ]; especially for highly polluted wastewater such as the one generated from the poultry slaughterhouse activities. In the raw wastewater, minimum, maximum, and average recorded TSS concentrations were 116.00, 1068.00, and 452.67 mg/L, respectively.…”

Critical Evaluation of Thin Film Composite Membrane on Pesticide Removal

“…It was reported that humic acid had less influence on pesticide rejection in deionized water due to the absence of ions, hence fouling was less than 6 % [42]. When the feed solution was switched to field water in a more recent study, there was a substantial increment in membrane fouling (14 %) [50]. The fouling was further aggravated to 23 % and 30 % when magnesium and calcium were added.…”

Facile synthesis of graphene wool doped with oleylamine-capped silver nanoparticles (GW-αAgNPs) for water treatment applications

“…Figure 5 suggests that significant competitive interactions took place between the NOM, BaP molecules, and the adsorbent leading to the comparative decline in removal efficiency, Freundlich adsorption capacity (K f ), partition coefficient (K d ), and maximum adsorption capacity (q max ). NOM has been reported to cause fouling of membranes, and retention of hydrophobic compounds and metals in solution, thus limiting the efficiency of conventional water treatment plants (Mehta et al 2017;Kurwadkar et al 2019;Adeola & Forbes 2021b). Essentially, NOM often alters the solution's chemistry such as pH, ionic strength, and the presence of leachable trace and heavy metals (Fig.…”