Waste seeds of Mangifera indica, Artocarpus heterophyllus, and Schizizium commune as biochar for heavy metal removal from simulated wastewater

Abstract

The threat of arsenic contamination in water is a challenging issue worldwide. Millions of people utilize untreated groundwater having high levels of arsenic in developing countries. Design Expert 6.0.8 has been used to design experiments and carried out statistical analysis for optimization of different parameters. It is of prime importance to develop cheap environment friendly bio-sorbent for protecting health of the poor from ill effects of arsenic. In the present investigation, we prepared bio-sorbent from the solid waste seed biomass of Mangifera indica (M), Artocarpus heterophyllus (JF), and Schizizium commune (JP). The characterization of bio-sorbents has been done by using different techniques namely FTIR and XRD. Arsenic concentration was estimated using ICP and adsorption parameters optimized for pH, adsorbent dose, and initial arsenic concentration. At pH 8.4, kinetics study of arsenic removal was M (94%), JF (93%), and JP (92%) for initial concentration of 2.5 ppm. The adsorption kinetics was well explained by Freundlich model and pseudo-second reaction order. Supplementary Information The online version contains supplementary material available at 10.1007/s13399-021-02078-5.

Advancements in application of modified biochar as a green and low-cost adsorbent for wastewater remediation from organic dyes

“…Several kinetic models, including pseudo-first-order and pseudo-second-order models, as well as Elovich, intra-particle, Bangham and film diffusion models, have been formulated to explain dynamic behaviour, comprehend the interaction between adsorbent and adsorbate, and gain insights into the adsorption mechanism of organic dyes by modified biochar [ 194 ]. Among these, the pseudo-first-order and pseudo-second-order models are most frequently employed.…”