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The indiscriminate disposal of non-biodegradable, heavy metal ionic pollutants from various sources, such as refineries, pulp industries, lead batteries, dyes, and other industrial effluents, into the aquatic environment is highly dangerous to the human health as well as to the environment. Among other heavy metals, lead (Pb(II)) ions are some of the most toxic pollutants generated from both anthropogenic and natural sources in very large amounts. Adsorption is the simplest, efficient and economic water decontamination technology. Hence, nanoadsorbents are a major focus of current research for the effective and selective removal of Pb(II) metal ions from aqueous solution. Nanoadsorbents based on graphene and its derivatives play a major role in the effective removal of toxic Pb(II) metal ions. This paper summarizes the applicability of graphene and functionalized graphene-based composite materials as Pb(II) ions adsorbent from aqueous solutions. In addition, the synthetic routes, adsorption process, conditions, as well as kinetic studies have been reviewed.
Mukesh Kumar; Jin Suk Chung; Seung Hyun Hur. Graphene Composites for Lead Ions Removal from Aqueous Solutions. Applied Sciences 2019, 9, 2925 .
AMA StyleMukesh Kumar, Jin Suk Chung, Seung Hyun Hur. Graphene Composites for Lead Ions Removal from Aqueous Solutions. Applied Sciences. 2019; 9 (14):2925.
Chicago/Turabian StyleMukesh Kumar; Jin Suk Chung; Seung Hyun Hur. 2019. "Graphene Composites for Lead Ions Removal from Aqueous Solutions." Applied Sciences 9, no. 14: 2925.
We report on the grafting of poly(methyl methacrylate) (PMMA) onto the surface of high-density functionalized graphene oxides (GO) through controlled radical polymerization (CRP). To increase the density of surface grafting, GO was first diazotized (DGO), followed by esterification with 2-bromoisobutyryl bromide, which resulted in an atom transfer radical polymerization (ATRP) initiator-functionalized DGO-Br. The functionalized DGO-Br was characterized by X-ray photoelectron spectroscopy (XPS), Raman, and XRD patterns. PMMA chains were then grafted onto the DGO-Br surface through a ‘grafting from’ technique using ATRP. Gel permeation chromatography (GPC) results revealed that polymerization of methyl methacrylate (MMA) follows CRP. Thermal studies show that the resulting graphene-PMMA nanocomposites have higher thermal stability and glass transition temperatures (T g) than those of pristine PMMA.
Mukesh Kumar; Jin Suk Chung; Seung Hyun Hur. Controlled atom transfer radical polymerization of MMA onto the surface of high-density functionalized graphene oxide. Nanoscale Research Letters 2014, 9, 345 -345.
AMA StyleMukesh Kumar, Jin Suk Chung, Seung Hyun Hur. Controlled atom transfer radical polymerization of MMA onto the surface of high-density functionalized graphene oxide. Nanoscale Research Letters. 2014; 9 (1):345-345.
Chicago/Turabian StyleMukesh Kumar; Jin Suk Chung; Seung Hyun Hur. 2014. "Controlled atom transfer radical polymerization of MMA onto the surface of high-density functionalized graphene oxide." Nanoscale Research Letters 9, no. 1: 345-345.