Removal of endrin and dieldrin isomeric pesticides through stereoselective adsorption behavior on the graphene oxide-magnetic nanoparticles

Abstract

A novel stereoselective removal behavior of isomeric endrin and dieldrin pesticides from sample solution is demonstrated using nanocomposite of graphene oxide (GO) and iron oxide (FeO) magnetic nanoparticles (MNPs). The removal efficiency of endrin and dieldrin was found higher when GO-MNPs was used as a separating probe than the individual use of GO and MNPs. The removal efficiency of both the pesticides was found to be more favorable when the dosage amount of GO-MNPs was 30 mg for 30-min contact time with pH 4.0 at room temperature. The good correlation of determination (R ) with 0.975 and 0.973 values obtained for endrin and dieldrin, respectively demonstrated a well fitting of Langmuir adsorption isotherm model. The higher removal percentage (86.0%) and higher slope value of Langmuir adsorption isotherm were estimated for endrin compared to dieldrin (74.0%). The reason for higher adsorption percentage of endrin is due to the endo-position of oxygen atom in molecule favors more interaction of molecules with GO-MNPs compared to the exo-position of oxygen present in dieldrin. In addition, the higher value of R for endrin and dieldrin demonstrated better suitability of pseudo-first-order and pseudo-second-order kinetic models, respectively. The advantages of the present method are use of simple UV-vis spectrophotometry for monitoring and low-cost use of GO-MNPs nanomaterial for the removal of pesticides from sample solution.

Matrix-dispersed magnetic molecularly-imprinted polyaniline for the effective removal of chlorpyrifos pesticide from contaminated water

“…20 Recently, the attention of many researchers has been grasped by the use of magnetic nanomaterials for the removal of hazardous contaminants, including pesticides, from water. [21][22][23][24] The removal of CPF from water via bioremediation, [25][26][27][28] Fenton reaction, [29][30][31][32][33] graphitic carbon nitride-incorporated chitosan 34 and metal nanoparticles 35 was reported in the literature. CPFselective MIPs and magnetic MIPs (MMIPs) were also reported using different kinds of polymers either for extraction/preconcentration or removal of CPF.…”

Carbon based materials: a review of adsorbents for inorganic and organic compounds

“…One of the most highly discussed applications of graphene in chemistry is its potential applicability in the adsorption of organic compounds, especially common hazardous materials. Graphene compounds have also been broadly investigated for the adsorptive elimination of different hazardous substances, such as antibiotics, [145][146][147] gases, 148 metals, 2,[149][150][151] VOCs, 152,153 phenolic compounds, [154][155][156] oil, 157-159 pesticides [160][161][162] and dyes [163][164][165] from water solution. A summary of pollutant adsorption capacities by graphenes and composite graphenes is presented in Table 6.…”

Functionalized Graphene-Based Materials as Innovative Adsorbents of Organic Pollutants: A Concise Overview

“…Modified graphene has also been tested as gatekeepers for several chiral molecules, many of them with bioactive and toxic properties (Hauser et al, 2014). Among the advantages of employing functionalization processes on graphene and graphene oxide nanosheets, it can be cited: increase of sorbent selectivity towards specific classes of pollutants (Lazarevic-Pasti et al, 2018;Shrivas et al, 2017); outstanding adsorption performance in terms of capacity and high recoverability (Suo et al 2018;Nodeh et al, 2015;Zhao and Liu, 2014); unlimited possibilities of functionalization, oftentimes by using the same reactant (Wanjeri et al, 2018;Bueno et al, 2017); some non-covalent functionalization can be reversed by non-aggressive methods (McCoy et al 2015); functionalization routes can be developed by using bio and ecofriendly compounds, such as amino acids, wood extracts, chitosan, etc. (Cobos et al, 2018;Xue et al, 2018;Wang et al, 2017b;Wang et al, 2016b).…”