Java plum and amaltash seed biomass based bio-adsorbents for synthetic wastewater treatment

Biomass of Java plum (JP) and amaltash (AT) seeds were employed to remove arsenic from synthetic wastewater, cost effectively. The prepared biomasses were characterized by FE-SEM, EDX, FTIR, XRD, and ICP techniques. Experimentation the optimization study has been carried out by using Design-software 6.0.8. Response surface methodology has been applied to design the experiments where we have used three factors and three levels Box-Behnken design (BBD). Arsenic removal ability of bio-sorbents was evaluated and optimized by varying pH, adsorbent dose concentration of arsenic in synthetic wastewater. For 2.5 mg/L arsenic concentration and 80 mg adsorbent dose at pH 8.8 Java plum seeds (JP) based bio-adsorbent removed similar to 93% and amaltash seeds (AT) based bio-adsorbent removed similar to 91% arsenic from synthetic wastewater. The adsorption behaviour better explained following Freundlich model (R-2 = 0.99) compared to Temkin model (R-2 = 0.986) for As (III) ions. The adsorption capacity was 1.45 mg g(-1) and 1.42 mg g(-1) for JP and AT, respectively after 80 min under optimal set of condition. The adsorption kinetics was explained by either pseudo-first order model or Elovich model. (C) 2021 Elsevier Ltd. All rights reserved.

Automated summary

The biomass of Java plum and amaltash seeds were used to remove arsenic from synthetic wastewater cost-effectively, with the optimization study resulting in removal rates of 93% and 91%, and adsorption capacities of 1.45 mg/g and 1.42 mg/g, respectively. The adsorption kinetics were explained by either pseudo-first order model or Elovich model.