Lead removal from synthetic wastewater by biosorbents prepared from seeds of Artocarpus Heterophyllus and Syzygium Cumini


Giri D. D. , Alhazmi A., Mohammad A., Haque S., Srivastava N., Thakur V. K. , ...More

CHEMOSPHERE, vol.287, 2022 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 287
  • Publication Date: 2022
  • Doi Number: 10.1016/j.chemosphere.2021.132016
  • Title of Journal : CHEMOSPHERE
  • Keywords: Biochar, Bio-sorbent, Lead removal, Seeds, AQUEOUS-SOLUTION, HEAVY-METALS, ADSORPTION, PB(II), IONS, BIOSORPTION, EFFICIENT, BIOCHAR, KINETICS, SORPTION

Abstract

The present investigation deals with removal of lead (Pb+2) ions from waste water using biosorbent prepared from seeds of Artocarpus heterophyllus (SBAh) and Syzygium cumini (SBSc). Biosorbents surface has been characterized through FT-IR spectroscopy to probe the presence of functional groups. Response surface methodology enabled optimized conditions (Pb+2 concentration 2 mu g/mL, pH 5.8 and bioadsorbent dose 60 mg) resulted in Pb+2 removal similar to 96% for SBAh and similar to 93% for SBSc at agitation speed 300 rpm. The adsorption capacity has been found to be 4.93 mg/g for SBAh and 3.95 mg/g for SBSc after 70 min. At optimal experimental conditions, kinetics of biosorption was explained well by inter-particle diffusion model for SBAh (R-2 = 0.99) whereas Elovich model best fitted for SBSc (R-2 = 0.98). Further, both the biosorbents followed Temkin adsorption isotherm model.