The effect of drilling fluids and crude oil on some chemical characteristics of soil and crops

Degradation of aviation fuel by microorganisms isolated from tropical polluted soils

“…Crude oil, particularly the aromatic fractions, is acutely lethal to agricultural soils, even in concentrations of few parts per million and chronically lethal in sub-lethal concentrations in parts per billion (Odiete, 1999). Affected soils lose their fertility and become unproductive (Nwachukwu and Ugoji, 1995), but within a few years crude oil contaminated soils generally return to full productivity (Kisic et al, 2009).…”

Heavy Metals Uptake by Aerial Biomass and Grain of Soybean

“…Increased mercury concentrations in treatments where drilling fluids were applied are attributed to the source of drilling fluids. The reason why drilling fluids contain a larger amount of calcium compounds is its use as an additive for inhibiting corrosion of oil and gas pipes, or as an additive to increase drilling fluid density (Veil & Dusseault, 2003;Kisic et al, 2009). Also, material with increased calcium compounds is usually added to bind fluids when repairing a pipe break or other incidents.…”

Spatial distribution of physico-chemical properties and function of heavy metals in soils of Yelagiri hills, Tamilnadu by energy dispersive X-ray florescence spectroscopy (EDXRF) with statistical approach

“…For the last two are characterized by their larger pore size and gritty texture, as well as low specific surface, and low holding capacity for water and nutrients [2]. Sand and silt textures are mainly composed of quartz with some fragments of feldspar, mica and traces of other heavy minerals [3], their composition evidences colloidal properties absence, and so far the physical, chemical and electro kinetic properties of soils composed mainly of these particles cannot be modified as it happens for clayey soils [4][5].…”