Application of Magnetic Graphene Oxide for Water Purification: Heavy Metals Removal and Disinfection. (February 2020)

• Record Type: Journal Article
• Authors: Ain, Qurat-Ul-; Farooq, Muhammad Umar; Jalees, Muhammad Irfan
• Is Part Of: Journal of water process engineering. Volume 33(2020)
• Publication Date: 2020-02
• Subjects: Magnetic graphene oxide -- Removal of heavy metals -- Disinfection -- Drinking water; Water-supply engineering -- Periodicals; Saline water conversion -- Periodicals; Seawater -- Distillation -- Periodicals; Sanitary engineering -- Periodicals; Sewage -- Purification -- Periodicals; 627
• DOI: 10.1016/j.jwpe.2019.101044
• Languages: English
• ISSNs: 2214-7144

Abstract

Highlights: Magnetic Graphene oxide (MGO) was synthesized via co-precipitation method. Adsorption capacity of MGO was enhanced due to Metal chelation and electrostatic attraction. MGO exhibited excellent removal efficiency of 98.787 %, 97.150 % and 97.689 % towards E-Coli, yersina ruckeri and antobacter agglomerans respectively. MGO could be effectively used up to four cycles. Abstract: Water pollutant like heavy metals is one of the major hazards due to rapid urbanization and industrialization. In this study, a simple, fast and facile method was applied for the synthesis of magnetic graphene oxide (MGO) by fabricating the surface of graphene oxide (GO) with iron particles (Fe 3+ ). Characterization of MGO was done by UV-VIS, FT-IR, SEM, XRD and VSM. Efficient removal of toxic heavy metal ions (Pb +2, Cr +3, Cu +2, Zn +2 and Ni +2 ) were studied using Atomic Absorption Spectroscopy (AAS). The adsorption performance of MGO was evaluated by investigating the effect of different parameters such as pH (3-9), temperature (25-55 °C), contact time (10-65 mins) and adsorbent dose (0.002 – 0.016 g). The maximum adsorption capacities at pH 5.0 for Pb (II), pH 6 for Cr (III), pH 6 for Cu (II), pH 7 for Zn (II) and pH 8 for Ni (II), ions were 200, 24.330, 62.893, 63.694 and 51.020 mg/g respectively. The adsorption processes was spontaneous and endothermic, followed the Langmuir adsorption isotherm and pseudo-second-order kinetics model. MGO action against microbial activity of E-Coli, Yersina Ruckeri and Antobacter Agglomerans was also studied. The results exhibited that MGO is a competent adsorbent and disinfectant for safe drinking water.