Hydrocarbon-Induced Changes in Physicochemical Properties in Tropical Niger Delta Soils

Phytorestoration Potential of Hydrocarbon-Induced Physicochemical Changes in Parts of Nigeria Eastern Niger Delta Waste oil Polluted Soil

“…The variation and changes in the physicochemical properties of the polluted and phytoremediated soils as presented in Table 1 showed non-significant decrease in pH across polluted soils; exemplified in the strong positive correlation (r = 0.53; P<0.05) with THC and a corresponding positive correlation (r = 0.18; P<0.05) with OG, indicating dependent variable decrease and independent variable increase. This corroborates similar study on pH reduction due to hydrocarbon pollution (Milala et al, 2015;Edwin-Wosu and Nkang, 2020) beside an increase earlier reported by Nwite and Alu (2015). The decrease in soil pH can be attributed to organic matter as well hydrocarbon degradation in tandem with a weak positive correlation (r = 0.19; P< 0.05) between pH and OM and a corresponding positive correlation (r = 0.53; P< 0.05) between pH and THC.…”

“…In like manner such ionic elevation due to hydrocarbon pollution has been recorded in NO3and PO4 -3 content of the waste oil polluted soil as exemplified in a weak positive correlation (r = 0.04; r = 0.02; P<0.05) with THC respectively indicating dependent variable increase with independent variable increase. This corroborate the study on hydrocarbon-induced changes including nitrate increase in a crude oil polluted tropical Niger Delta soils (Nwite and Alu, 2015;Edwin-Wosu and Nkang, 2020). It has been revealed that soil salinity can be determined by the concentration of dissolved salt.…”

“…It has been revealed that soil salinity can be determined by the concentration of dissolved salt. This is in tandem with the fact that low level salinity in soil of most humid regions are link to ionic salt concentration and when elevated due to pollution has consequently increased salinity (Abdulfattah et al, 2016, Edwin-Wosu andNkang, 2020). This can also be reflected in the present research in which salinity increased in relation to NO3and PO4 -3 increase beside Cland SO4 -2 decrease across pollution as exemplified in a positive correlation (r = 0.16; P<0.05) between salinity and THC as well as positive correlation (r = 0.28; r = 0.09; r = 0.18; P<0.05) between salinity and Cl -, SO4 -2 and PO4 -3 respectively beside a weak negative correlation (r = -0.04; P<0.05) with NO3 -.…”

“…Generally Peltophorum soil had greater pH among the species in the order Pp>Cr >Ll, with corresponding positive correlation (r = 0.45; r = 0.03; r = 0.23; P<0.05) between pH and Pp, Cr and Ll respectively. Study has revealed pH toward alkalinity as well as pH values of 5.20 and 6.30 for soil in the Niger Delta area under hydrocarbon inducement (Bassey and Ebele, 2016;Victoria et al, 2016;Edwin-Wosu and Nkang, 2020).…”

“…With the varying constituent of the waste oil, the soil environment of the study area in question is affected in different manners in light of its physicochemical properties at different levels of pollution. Several studies have revealed the deteriorating impact of fluid characterized by properties that differ from water and of hydrocarbon-induced changes in soil physicochemical conditions (Inwite and Alu 2015; Victoria et al, 2016;Edwin-Wosu and Nkang 2017a;Edwin-Wosu and Nkang, 2019a;Edwin-Wosu and Nkang 2020). Remediation studies have being evaluated, revealing the potency of plant species for phytoremediation in diverse trend of hydrocarbon impacted soil condition (Al-Baldawi et al, 2015;Xiao et al, 2015;Edwin-Wosu and Nkang 2017a).…”