1 23 Environmental Monitoring and Assessment An International Journal Devoted to Progress in the Use of Monitoring Data in Assessing Environmental Risks to Man and the Environment ISSN 0167-6369 Volume 184 Number 11 Environ Monit Assess (2012) 184:6527-6540 DOI 10.1007/s10661-011-2438-3 Remediation of hydrocarbons in crude oil- contaminated soils using Fenton’s reagent Chukwunonye Ojinnaka, Leo Osuji & Ozioma Achugasim