Distribution and interactions of pentachlorophenol in soils: The roles of soil iron oxides and organic matter

Diagboya, P.N. and Olu-Owolabi, B.I. and Adebowale, K.O. (2016) Distribution and interactions of pentachlorophenol in soils: The roles of soil iron oxides and organic matter. Journal of Contaminant Hydrology, 191. pp. 99-106.

[img] Text
2016_JCH_Treated_Soil_PCP.pdf

Download (700kB)
Official URL: http://www.sciencedirect.com/science/article/pii/S...

Abstract

Soil iron oxides (IOs) and organic matter (OM) play varying roles in pentachlorophenol (PCP) retention and mobility, but the extent and mechanism are still unknown. Therefore, in order to have a better understanding of the adsorption of PCP on soils, batch sorption studies were carried out on whole soils and soils selectively treated to remove IOs (IOR) and OM (OMR). The effects of pH, time, and temperature were investigated. Results showed that PCP sorption was temperature and pH dependent; sorption decreased as both temperature and pH increased. Sorption was partly surface adsorption and partly partitioning within voids of IOs components as revealed by the kinetics models. The surface adsorption was multi-layer in nature. Equilibria were faster in the IOR soils than the untreated and OMR soils. IOs played greater roles in PCP sorption than OM. Removal of soil components, especially the IOs, as experienced in soils plagued by soil erosion, may lead to increased risks of PCP pollution of environmental media especially the aquifer.

Item Type: Article
Uncontrolled Keywords: Sub-Saharan soils; Soil iron oxides removal; Soil organic matter removal; Sorption; Anionic pesticide
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Engineering, Science and Mathematics > School of Chemistry
Depositing User: Dr. Paul Diagboya
Date Deposited: 28 Jun 2017 14:14
Last Modified: 28 Jun 2017 14:14
URI: http://eprints.lmu.edu.ng/id/eprint/519

Actions (login required)

View Item View Item