# Metachrylate-Based Polymeric Sorbents for Recovery of Metals from Aqueous Solutions
## 6 Methacrylate-Based Sorbents  
The results regarding the usage of various polymers as metal ions sorbents were published in numerous studies. However, since it is impossible to cover all of them, we summarized methacrylate-based sorbents in Table 3.  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Adsorbents** & **Metals \({}^{\star}\)** & **pH** & **Concentration** &
\begin{tabular}{c} **Adsorption** \\ **Capacity** \\ \end{tabular} & **Reference** \\ \hline Poly(methyl methacrylate)/poly(ethyleneimine) & Cu(II) & 5 & 5 mg/L & 14 mg/g & [90] \\ core-shell nanoparticles & & & & & \\ \hline Amidoximated acrylonitrile/methyl acrylate copolymer & Hg(II) & 2 & 0.25–5 mmol/L & 4.97 mmol/g & [91] \\ \hline Poly(\(N\)-2-methyl-4-nitrophenyl maleimide-maleic anhydride-methyl methacrylate) terpolymers & Cd(II) & 7 & 0.2–100 mg/L & 77.56 mg/g & [92] \\ \hline Boehmite/poly(methyl methacrylate) & Cu(II) & 4 & 10 mg/L & 9.43 mg/g & [93] \\ nanocomposites & & & & & \\ \hline Poly(methyl methacrylate-2-hydroxyethyl methacrylate) & Co(II) & & & & 28.8 mg/g & [94] \\ methacrylate-ethylene glycol dimethacrylate/ & Pb(II) & 6 & 10–50 mg/L & 31.4 mg/g & [95] \\  & Cu(II) & & & & 31.2 mg/g & \\ \hline Nano-magnetic poly(methyl methacrylate-glycidyl methacrylate-divinylbenzene)-ethylenediamine & Cu(II) & 6 & 100–300 mg/L & 87.72 mg/g & [95] \\  & Cr(VI) & 2 & 50–1000 mg/L & 136.98 mg/g & [95] \\ \hline Nano-magnetic poly(methyl methacrylate-glycidyl methacrylate-divinylbenzene)-diethylenediamine & Cu(II) & 6 & 100–300 mg/L & 94.30 mg/g & [95] \\  & Cr(VI) & 2 & 50–1000 mg/L & 149.25 mg/g & [95] \\ \hline Nano-magnetic poly(methyl methacrylate-glycidyl methacrylate) & Cu(II) & 6 & 100–300 mg/L & 92.60 mg/g & [95] \\  & Cr(VI) & 2 & 50–1000 mg/L & 204.08 mg/g & [95] \\ \hline Nano-magnetic poly(methyl methacrylate-glycidyl methacrylate) & Cu(II) & 6 & 100–300 mg/L & 116.80 mg/g & [95] \\  & Cr(VI) & 2 & 50–1000 mg/L & 370.37 mg/g & [95] \\ \hline Poly(methyl methacrylate-co-ethyl acrylate) membrane & & & & & & \\  & Fe(III) & 6 & 0.1–1.0 mmol/L & 8.2 mmol/L & [96] \\ \hline Poly(methyl methacrylate-co-butyl methacrylate) membrane & Cu(II) & 6 & 0.1–1.0 mmol/L & 1.35 mmol/g & [96] \\ \hline Poly(methyl methacrylate-glycidyl methacrylate-ethylene glycol dimethacrylate)-1,9-nonanedithiol & Ag(I) & - & 10 mg/L & 21.7 mg/g & [97] \\ \hline  & Cu(II) & 5.5 & & & 1.10 mmol/g & \\  & Cd(II) & 5.5 & & & 0.67 mmol/g & \\  & Zn(II) & 2.1 & & & 0.25 mmol/g & \\ Poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate)-ethylenediamine & Fe(II) & 1.25 & & & 0.14 mmol/g & [88] \\  & Mn(II) & 1.25 & & & 0.12 mmol/g & \\  & Pb(II) & 1.25 & & & 1.06 mmol/g & \\  & Cr(III) & 1.25 & & & 0.47 mmol/g & \\  & Pt(IV) & 5.5 & & & 1.30 mmol/g & \\ \hline \hline \end{tabular}
\end{table}
Table 3: Adsorption capacity of metal ions using different methacrylate sorbents.  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
In further text, the main focus will be set on macroporous non-magnetic and magnetic, amino-functionalized glycidyl methacrylate (GMA). Macroporous polymeric sorbents consisting of crosslinked copolymers (solid support) and functional groups (ligands) are potentially very attractive as selective sorbents for precious and heavy metal ions with some advantages over other sorbents, being highly efficient, cost-effective, and reusable [110, 117].