Synthesis of super magnetite(Fe3O4)/ bentonite nanocomposite for efficient remediation for industrial wastewater effluents

Abstract

T he goal of the current work was to prepare magnetite/bentonite nanocomposite and testing for expulsion effectiveness of cationic methylene blue (MB) and anionic methyl orange (MO) dyes, phenol and Ni 2+ from industrial wastewater in individual and combined systems. Batch experiments have been done to observe the best adsorption by altering various parameters such as temperature, pH, the dose of adsorbent, initial pollutants concentration and contact time. The results demonstrated that the optimum pH for removing (MB) was 9.0, (MO) was 4.0, phenol was 7.0 and 4.0 for Ni 2+ . The optimum concentration, temperature, contact time and adsorbent dose were 100 mg/L, 80 o C, 120 min and 1g of adsorbent, respectively. The sorption process was modeled utilizing Languir and Freundlich equations. The adsorption isotherm demonstrated a superior fit to Freundlich than Languir equation. The analysis was also modeled using the pseudo-first and second order equations. The pseudo-second-order equation gave better fit with an R 2 value; 0.999 for all pollutants. This implies that our proposed magnetite\ bentonite nanocomposite can be utilized as a cheap and excellent adsorbent for expulsion of cationic and anionic dyes, phenol and cationic heavy metal ions from industrial wastewater.

Synthesis and Characterization of Fe3O4-Bentonite Nanocomposite Adsorbent for Cr(VI) Removal from Water Solution

“…Interestingly, the intercalation of the magnetite nanoparticles into bentonite increased its specific surface area and hence more favourable for the adsorption process. A study has reported 35.8 m 2 /g as a specific surface area for bentonite [24]. Yet another study reported 59.9 m 2 /g as a specific surface area for bentonite [4].…”

“…ese extraordinary advantages are specifically useful for the reusability of magnetite nanoparticles [22]. In recent years, many efforts have been made to prepare adsorbent materials by incorporating magnetite nanoparticles [3,[21][22][23][24].…”

Application of UV-A light Operating Photoreactor for Green Degradation of Direct Blue 15 through the Photo-Fenton-like process: Effects and Box-Behnken Optimization

“…The idea of mixing the copper with iron is to enhance the generation of atomic hydrogen on the surface of BMNPs and therefore enhance the reductive degradation of dyes as well copper accelerates the galvanic corrosion of ZVI-NPs to generate Fe 2+ as this ion reacts with H2O2 to generate •OH [16]. In addition, a wide variety of materials can be used as a support materials for NPs such as multi-walled carbon nanotubes, activated carbon, zeolite, bentonite clays [17], and kaolinite [18]. Particularly, bentonite exhibits good thermal, chemical, and mechanical stability and it also provides high specific surface area and is available at low cost [12].…”