Abstract
In this study, iron nano-particles were used to remediate malathion contaminated soil in the concentration range of 1 - 10 ug?g–1. The zero valent iron nano-particles were prepared by reducing ferric chloride solution with sodium boro- hydride for remediation of the soil. The optimized quantity of iron nano particles was found to be 0.1 g?kg–1 of soil con- taminated with 10 ug?g–1 of malathion. Malathion was determined in the soil after leaching to water at pH 8.2 and fol- lowed by its oxidation with slight excess of N-bromosuccinimide (NBS). The unconsumed NBS was estimated by measuring the decrease in the color intensity of rhodamine B. Degradation product formed during the oxidation of ma-lathion by zero valent iron was monitored by the Attenuated Total Reflectance Fourier Transform Infrared Spectros- copy (ATR-FTIR). The results clearly showed that quantitative oxidation of malathion was achieved within eight min- utes after the addition of zero valent iron nano particles.
Highlights
Organophosphates are esters of phosphoric acid, thiophosphoric acid and other phosphoric acids, which are widely used as insecticides and acaricides. [1,2] Malathion {Diethyl 2-[(dimethoxyphosphorothioyl)sulfanyl] butanedioate}, commonly referred to as organophosphorous pesticides (OPPs) is used as insecticides for control of insects on fruits and vegetables
The results clearly showed that quantitative oxidation of malathion was achieved within eight minutes after the addition of zero valent iron nano particles
It was observed that at pH 8.2 about 80% of the spiked malathion was leached from the soil and thereafter percentage of leaching of malathion from soil remained nearly constant
Summary
Organophosphates are esters of phosphoric acid, thiophosphoric acid and other phosphoric acids, which are widely used as insecticides and acaricides. [1,2] Malathion {Diethyl 2-[(dimethoxyphosphorothioyl)sulfanyl] butanedioate}, commonly referred to as organophosphorous pesticides (OPPs) is used as insecticides for control of insects on fruits and vegetables. [1,2] Malathion {Diethyl 2-[(dimethoxyphosphorothioyl)sulfanyl] butanedioate}, commonly referred to as organophosphorous pesticides (OPPs) is used as insecticides for control of insects on fruits and vegetables. Organic phosphate pesticides are of great environmental concern primarily because they are toxic to mammals and birds [4]. Malathion is a non systemic wide-spectrum organophosphate insecticide and is one of the earliest organophosphate insecticides developed in 1950. It is used for the control of sucking and chewing insects on fruits and vegetables, and used to control mosquitoes, flies, household insects, animal parasites (ectoparasites). Pesticides, like other organic pollutants, are retained by the soil according to their physicochemical properties, nature and composition [2].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
