Abstract
INVESTIGATION INTO TOXICITY CHARACTERISTICS OF USED CUTTING FLUIDS ON ECOLOGY
Olawale Kazeem Babalola*, Mohammed Abdullahi Shehu and Ahmed Garba
ABSTRACT
Disposal of used cutting fluids in machining operations has been a major concern to the management of Challawa industrial estate in Kano state of Nigeria, as components identified to be hazardous must be disposed by a permitted applicable federal and state legislations. To address this problem, this study introduced the Toxicity Characteristics Leaching Procedure (TCLP) to identify the hazardous component in the wastes. The soil sample in the area was collected, the liquids and solids waste were separated by filtration through a fiberglass. The particle size was reduced by filtering through a 9.5mm sieve and the cut into 1cm. Sodium hydroxide (NaOH) (was used as reagent in conformity with the specification of the committee on Analytical Reagents of American Chemical Society) which leaches through the solid the same way water seeps through landfill. Having separated the liquids and solids wastes component, TCLP results showed higher concentration of toxic contaminants such as Arsenic, Barium, Cadmium, Chromium, Lead, Heptachlor, Hexachlorobenzene, Methoxyclor, Choroform and Vinyl Chloride. The waste failed the TCLP test and is characteristically hazardous. The study concluded by recommending eco-friendly machining and fluid management program that would maintain fluid performance and extend fluid life among other recommendations.
[Full Text Article] [Download Certificate]