Remediation of contaminated water from nitrate and diazinon by nanofiltration process

Abstract

Nitrate and diazinon pesticide is among the environmental challenges which enter water resources, mostly as a result of agricultural activities. In this study, the effects of diazinon concentration, nitrate concentration and pH on the efficiency of simultaneous removal of contaminants from polluted water were investigated, applying a commercial polyamide nanofilter. Each factor was considered in three levels where diazinon concentration, nitrate concentration and solution pH were in the range of 10-1,000 μg/L, 40-160 mg/L and 5-9, respectively. The experiments were conducted at constant pressure of 6 bar. The response surface method was adopted in the experimental design to obtain the impact of mentioned factors. It was found that increasing diazinon concentration and pH enhance the pesticide removal efficiency up to 94%, while increasing nitrate concentration increases the commercial nanofilter efficiency from 80 to 85%. The diazinon removal percentage at optimum condition was estimated to be about 93% at diazinon concentration of about 90 μg/L, nitrate concentration of about 80 mg/L and pH of 9.

The Effects of Ginger (Zingiber officinale) Extract Ointment on Pain and Episiotomy Wound Healing in Nulliparous Women: A Randomized Clinical Trial

“…Since the sample size calculated based on "pain" was more significant, the sample size in each group was finally decided to be 35 (Figure 1). 18 This study was conducted after approval by the Ethics Committee of Tabriz University of Medical Sciences (IR.TBZMED.REC.1399.333) and registration on the Iranian Registry of Clinical Trials (Identifier: IRCT20110922007618N9, registered on August 14, 2020).…”

Study on diazinon toxicity reduction by electro-Fenton process: A bioassay using daphnia magna

“…In general, the removal of pollutants and pesticides from water sources is accomplished through three main approaches, which include physical, chemical, and biological methods [ [15] , [16] , [17] , [18] ]. The use of adsorption methods [ 19 ], nanofiltration and reverse osmosis [ 20 , 21 ], electrochemical [ 22 ], advanced oxidation processes [ 23 ] and a combination of the above methods have been used to remove diazinon from water sources [ 24 ]. In recent times, the application of advanced oxidation processes (AOPs) has garnered substantial attention as efficient techniques for the eradication of pesticides from water sources [ 25 ].…”

DFT Study of Adsorption of Diazinon, Hinosan, Chlorpyrifos and Parathion Pesticides on the Surface of B₃₆N₃₆ Nanocage and Its Fe Doped Derivatives as New Adsorbents

“…The harmful effects of these toxin residue in the environment excited researchers to explore methods for removing these toxins from environment, and especially surface waters. Thereby many experimental researches were performed [11][12][13][14][15] , but a few theoretical studies are conducted in this topic 16 .…”