Journal of Environmental Biology

Kinetics of lead sorption by farm yard manure

M. Ganesan¹ and C. Thiyagarajan²*     

¹Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore-641 003, India

²Department of Sericulture, Forest College and Research Institute, Mettupalayam, Coimbatore-641 003, India

Received: 24 February 2024                   Revised: 25 April 2024                   Accepted: 21 October 2024

*Corresponding Author Email : chitdeshwari@tnau.ac.in                           *ORCiD: https://orcid.org/0000-0001-5383-7718

Abstract

Aim: Removal of lead through adsorption and immobilization using processed or composted farm wastes is one of the effective methods to reclaim contaminated waste water. This study deals with the lead removal potential of farm yard manure (FYM) from contaminated waste water.

Methodology: A batch incubation experiment was conducted to study the effect of sorbent dosage, initial lead concentration, and incubation intervals on lead adsorption and desorption and the data was fitted to various kinetic models.

Results: The rate of lead adsorption increased with increasing sorbent dosage and time with a mean adsorption rate of 78.1%. Fitting the adsorption data to various kinetic models revealed that, pseudo second-order kinetic model described the adsorption process better than other models and chemisorption was the dominant mechanism of lead removal. The lead desorption rate also decreased with sorbent dosage and lead concentration at successive time intervals with a mean of 0.37%, which further confirmed its efficiency in lead removal.

Interpretation: Farm yard manure could be utilised as an effective biosorbent for removing lead from wastewaters.

Key words: Adsorption, Farm yard manure, Kinetic models, Lead

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