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Article Title

Kurşunun grafen oksit nanopartikülü ile giderimi ve grafen oksitin geri kazanımı

Abstract

In this study, Graphene Oxide (GO) adsorbent has been developed under laboratory conditions to eliminate Lead (Pb) adsorption process in wastewater from Mining Industry. According to XRD results, the intensity values corresponding to 2Ѳ=16,880 and 2Ѳ=44,600 on the surface of graphene oxide are 004 intensity units and 106 intensity units, respectively, and are crystalline. According to SERS analysis, the maximum peaks of lead connected to graphene oxide in D and G bands are 1450 and 1670 cm-1 , respectively. The BET surface area of graphene oxide is 21.3 m2 / g, the hole volume is 3.98 nm and it is observed that lead interferes with the surface and inner layers of graphene oxide. Adsorption was formed by binding with organic rings of C=C/C-C, C-O, COH and C=O. The results of TEM analysis showed that graphene oxide's surface layers were stratified before adsorption and graphene oxide was spherical particles after adsorption process. Optimum operating conditions (Graphene oxide concentration 1.8 mg/L, temperature =18oC, contact time 28 min, pH=8.5) were determined for maximum lead adsorption efficiency (99.99%). Low H+ ions are too low at low pH, resulting in low adsorption capacity. Adsorption of lead to graphene oxide is at low temperature and adsorption at high temperature is blocked. The maximum adsorption capacity of lead is 320 mg/g, adsorption kinetics and isotherm are pseudo first order kinetic model and Freundlich isotherm, respectively. Graphene oxide is a very effective adsorbent, the maximum lead yield obtained in 8 consecutive use is 99%.

https://dergipark.org.tr/tr/download/article-file/842002

DOI

10.24012/dumf.639086

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