Sustainable Remedy Waste to Generate SiO2 Functionalized on Graphene Oxide for Removal of U(VI) Ions

Mohamed A Hassanin,Mohamed A Youssef,Tarek F Mohammaden,Hamed I Mira,Jamelah S Al-Otaibi,M I Sayyed,Mohamed F Cheira,Ahmed K Sakr,Sameh H Negm,Mohamed Y Hanfi

doi:10.3390/su14052699

Abstract

The Hummer process is applied to generate graphene oxide from carbon stocks’ discharged Zn-C batteries waste. SiO2 is produced from rice husks through the wet process. Subsequently, SiO2 reacted with graphene oxide to form silica/graphene oxide (SiO2/GO) as a sorbent material. XRD, BET, SEM, EDX, and FTIR were employed to characterize SiO2/GO. Factors affecting U(VI) sorption on SiO2/GO, including pH, sorption time, a dosage of SiO2/GO, U(VI) ions’ concentration, and temperature, were considered. The experimental data consequences indicated that the uptake capacity of SiO2/GO towards U(VI) is 145.0 mg/g at a pH value of 4.0. The kinetic calculations match the pseudo second-order model quite well. Moreover, the sorption isotherm is consistent with the Langmuir model. The sorption procedures occur spontaneously and randomly, as well as exothermically. Moreover, SiO2/GO has essentially regenerated with a 0.8 M H2SO4 and 1:50 S:L phase ratio after 60 min of agitation time. Lastly, the sorption and elution were employed in seven cycles to check the persistent usage of SiO2/GO.

Highlights

Uranium ions may develop into the environment through applications, industry, and mining, posing risks to health of humans and biological situations because of radiation and toxicity [1,2]
The experimental parameters are pH, initial U(VI) concentration, contact time, SiO2 /graphene oxide (GO) dose, and temperature, with which we examined U(VI)
42◦ were characterized of graphene oxide (GO), which correspond to the database of Bruker software COD 2000183 and 2002929

Summary

Introduction

Uranium ions may develop into the environment through applications, industry, and mining, posing risks to health of humans and biological situations because of radiation and toxicity [1,2]. By the widespread use of atomistic energy and further applications, U(VI) is exceptionally loose in running solutions; it threatens environmental safety and biological balance [3,4]. To acquire U(VI) outputting from radioactive wastewater that is financially workable, the extracting materials must maintain tremendous extracting ability, selectivity, departure rate, and reusability applications. Most studies have been directed towards the application of extracting materials for U(VI) adsorption due to its high performance, capacity, low cost, and broad versatility [7,8]. Numerous investigations were conducted for the removal and extraction of U(VI), comprising ion exchange [9–12], precipitation [13], liquid extraction [14], film separation [14,15], and sorption [16–20].

Methods

Results

Conclusion