Evaluation of pyrene sorption–desorption on tropical soils

Olu-Owolabi, B.I and Diagboya, P.N. and Adebowale, K.O. (2014) Evaluation of pyrene sorption–desorption on tropical soils. Journal of Environmental Management, 137. pp. 1-9.

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Abstract

Sorption–desorption processes control soil-pollutant interactions. These processes determine the extent of pyrene transport in soils. Understanding sorption characteristics of pyrene is necessary in ascertaining its fate in soil. Laboratory batch experiments were conducted to study the sorptions–desorption of pyrene on eight soils from varying tropical agro-ecological zones (AEZs). The results showed that pyrene sorptions equilibria were attained within 720 min. Solution pH had a reciprocal effect on pyrene sorptions. Sorption was exothermic and increased with pyrene concentration in solution. The quantities of pyrene sorbed by each soil as well as the hysteresis were proportional to the percentage organic matter, and to some degree, the clay mineralogy. Sorption isotherms showed distributed reactivity involving several linear and non-linear isotherms. The present investigation showed that pyrene is likely to be more available to biota and reach the aquifer faster in low organic matter soils than those with relatively higher organic matter and more so in warmer climes.

Item Type: Article
Subjects: Q Science > QD Chemistry
S Agriculture > S Agriculture (General)
Divisions: Faculty of Engineering, Science and Mathematics > School of Chemistry
Depositing User: Dr. Paul Diagboya
Date Deposited: 13 Jul 2016 14:18
Last Modified: 13 Jul 2016 14:18
URI: http://eprints.lmu.edu.ng/id/eprint/447

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