Evaluation Of The Modified Almond Shell And Carboxymethyl cellulose Performance With Graphene Oxide In Removal Of Heavy Metals Ni And Cd From Water

Document Type : Original Article


1 Department of Environment, Faculty of Basic Sciences, Islamic Azad University, Hamedan Branch, Hamedan, Iran

2 Department of Chemistry, Faculty of Basic Sciences, Islamic Azad University, Hamedan Branch, Hamedan, Iran


Environmental Protection Agency of America has classified heavy metals such as Cd, Hg, As, Ni, Pb and Cr, as the toxic pollutants of environment. These elements imported into the environmental cycle by the chemical industries and other industries, such as water, agricultural products and human body, and ultimately its harmful effects on human. In this respect, separating and removal of heavy metals is an important task in controlling environmental pollutants. In the recent years the usage of nanoparticles as an adsorbent with high adsorption efficiency has attracted a lot of attention. Nano graphene oxide used in this study is classifying in the category of high capacity adsorbents due to its high specific surface area. In this study in addition to graphene oxide, Almond shell and Carboxymethyl cellulose were also used to improve the removal efficiency of heavy metals. The aim of this research is to synthesize Graphene oxide nanoparticles modified with Almond shell and Carboxymethyl cellulose and also to evaluate its performance in the removal of nickel and cadmium from water. The Nano Graphene oxide was synthesized by the Freeze- drying method and in order for characterization of the synthesized nanoparticles, FT-IR and SEM methods were used. Various parameters such as pH solution, contact time and adsorbent amount were investigated and the optimal values of each of factors were determined. The modeling of the absorption process was carried out using two models of Langmuir and Freundlich isotherms and the results show that the adsorption rate is consistent with the Langmuir isotherm model for nickle and Freundlich isotherm for the adsorption of cadmium. The results showed that the modified nanoparticles have better absorption capacity than unmodified ones, and its effectiveness to remove the element of Cd is more than Ni.


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