Hyphenated Fenton-column packed nMnO-modified wood biochar for tannery effluent treatment: Adsorption mechanism and reusability study

Kavita Singh, Bablu Prasad, Abhishek Kumar, Madhu Kumari, Darpan Dubey, Mika Sillanpää, Kumar Suranjit Prasad

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Industrial wastewater contains a wide range of pollutants that, if released directly into natural ecosystems, have the potential to pose serious risks to the environment.This study aims to investigate sustainable and efficient approaches for treating tannery wastewater, employing a combination of hyphenated Fenton oxidation and adsorption processes. Rigorous analyses were conducted on wastewater samples, evaluating parameters like COD, sulphide, NH3–N, PO4 3−, NO3 , and Cr(VI). The performance of this adsorbent material was gauged through column adsorption experiments. A comprehensive characterization of the adsorbent was undertaken using techniques such as SEM, EDX, BET, FTIR, XRD, and LIBS. The study delved into varying operational parameters like bed depth (ranging from 3.5 to 9.5 cm) diameter (2.5 cm) and influent flow rate (ranging from 5 to 15mLmin-1). The experimental outcomes revealed that increasing the bed depth and decreasing the influent flow rate significantly bolstered the adsorption column's effectiveness. Breakthrough curves obtained were fitted with different models, including the Thomas and Yoon-Nelson models. The most optimal column performance was achieved with a bed height of 10.5 cm and a flow rate of 5mLmin-1. The combined process achieved removal efficiencies of 94.5% for COD, 97.4% for sulphide, 96.2% for NH3–N, 83.1% for NO3 , 79.3% for PO4 3−, and 96.9% for Cr(VI) in tannery effluent. This research presents a notable stride toward the development of sustainable and efficient strategies for tannery wastewater treatment.

Original languageEnglish
Article number118786
JournalEnvironmental Research
Volume252
DOIs
Publication statusPublished - 1 Jul 2024

Keywords

  • Bombax ceiba
  • Fenton oxidation
  • Fixed-bed adsorption
  • Tannery effluent

ASJC Scopus subject areas

  • Biochemistry
  • General Environmental Science

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