Synthesis of silicone material organo-cured with thiourea and methyl methacrylate for heavy metals adsorption from polluted water

Abstract

For the first time, a novel solid adsorbent of silicone rubber modified with thiourea and methyl methacrylate polymeric material was developed for Mn(II) and Fe(III) adsorption from wastewater.

Since these two elements Mn(II) and Fe(III) represent a very big problem in the drinking water resulting from treatment from the technology station during some stages, in this way they are used again in agriculture and also for human use. Before crosslinking the polymer chains, methyl methacrylate (as partial hydrogen bonding cross-linking sites) quickly interacted with thiourea groups, resulting in rapid curing. The polymeric adsorbent’s structure was investigated by XRD, FTIR, SEM, EDX, and Brunauer, Emmett, and Teller analyses. The polymeric material’s adsorption efficiency for Mn(II) and Fe(III) from wastewater has been studied by XRF. The adsorption factors (including contact time, pH, temperature, and metal concentration) were extensively examined. The adsorption optimized conditions were elucidated to study the structure–property relationship. The material’s maximum adsorption capacity was 14 for Mn(II) and 29 mg/g for Fe(III). Reusability studying is 3 stage, A pseudo-second-order mechanism was recycled in the adsorption of Mn(II) and Fe(III) of wastewater, which followed the Langmuir isotherm model. The obtained thermodynamic factors (such as ΔH°, ΔG°, and ΔS°) demonstrated that Mn(II) and Fe(III) were adsorbed exothermically and spontaneously. A novel porous silicone-thiourea-methyl methacrylate blend showed outstanding adsorption efficiency for Mn(II) and Fe(III) adsorption.