Affiliation:
1. Soil Sciences Department, College of Food & Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
Abstract
Microplastics (MPs) are emerging environmental pollutants worldwide, posing potential health risks. Moreover, MPs may act as vectors for other contaminants and affect their fate, transport, and deposition in the environment. Therefore, efficient and economical techniques are needed for the removal of contemporary MPs and contaminants from the environment. The present research study investigated the sorption of phosphorus (P) and ammonium (NH4+) onto date palm waste-derived biochar (BC) from an aqueous solution in the presence of polyamide (PA) and polyethylene (PE) MPs. The BC was prepared at 600 °C, characterized for physio-chemical properties, and applied for P and NH4+ removal via isotherm and kinetic sorption trials. The results of the sorption trials demonstrated the highest removal of NH4+ and P was obtained at neutral pH 7. The highest P sorption (93.23 mg g−1) by BC was recorded in the presence of PA, while the highest NH4+ sorption (103.76 mg g−1) was found with co-occurring PE in an aqueous solution. Sorption isotherm and kinetics models revealed that P and NH4+ removal by MP-amended BC followed chemisorption, electrostatic interaction, precipitation, diffusion, and ion exchange mechanisms. Overall, co-existing PA enhanced the removal of P and NH4+ by 66% and 7.7%, respectively, while co-existing PE increased the removal of P and NH4+ by 55% and 30%, respectively, through the tested BC. Our findings suggested that converting date palm waste into BC could be used as a competent and economical approach to removing P and NH4+ from contaminated water. Furthermore, microplastics such as PE and PA could assist in the removal of P and NH4+ from contaminated water using BC.
Funder
Deputyship for Research & Innovation, “Ministry of Education” in Saudi Arabia
Subject
Chemical Health and Safety,Health, Toxicology and Mutagenesis,Toxicology
Reference58 articles.
1. Microplastics as an emerging environmental pollutant in agricultural soils: Effects on ecosystems and human health;Yu;Front. Environ. Sci.,2022
2. PlasticsEurope (2023, June 08). Plastics—The Facts. An Analysis of European Plastics Production, Demand, and Waste Data. PlasticEurope. PlasticEurope.
3. Trevor, M.L. (2020). Plastic Waste and Recycling, Academic Press.
4. Lost at sea: Where is all the plastic?;Thompson;Science,2004
5. Microplastics in the environment: A critical review of current understanding and identification of future research needs;Akdogan;Environ. Pollut.,2019