(a) Completed

(i) Assessment and chemical remediation of soil contaminated by lead-acid             battery waste in Lalupon, Ibadan.  

(ii) Effectiveness of phosphate chemicals, compost, cashew nut shell ash and  biochar to remediate the contaminated soil both in the laboratory and field trials.

(iii) Geopolymerisation of fly ash with  spent aluminium etching waste solution from aluminium anodising industry for use in waste immobilisation and construction applications.

(iv) Characterisation of Nigerian clay for production of geopolymers.

(v) Current management practices of municipal solid and domestic small electrical  wastes and evaluation of agricultural waste for potential uses.

            (b) In Progress

            (i) The current study on soil assessment and remediation commenced in 2010 and is based on assessment of other sites contaminated by the lead slag in Ibadan. The ongoing remediation techniques include the use of compost and biochar in greenhouse experiments to treat the contaminated soil. Previous results showed that Sporobolus fertilis and Gomphrena serrate from the Pb slag contaminated sites acted as potential heavy metals accumulators. These plants are being investigated for phytoremediation technique and lead phytomining.

(ii) Characterisation and mining of metals from waste batteries of electrical and electronic products for secondary uses started in 2010 and are ongoing in the area of waste management. Material compositions, chemical compositions and methods of disposal of end-of-life non-rechargeable and rechargeable electric torches and lamps which are used in large volume in Nigeria have been reported through this study. Possibility of recovering and recycling metals from the electronic wastes is ongoing.

(iii) The study on geopolymer science commenced in 2010. Nigerian kaolin clays have shown good potential for synthesis of geopolymers. The current study focuses on evaluating the effect of clay replacement at different proportions with aluminosilicate wastes such as glass and metallurgical slag on the reaction kinetics, mechanical, structural and durability properties of the geopolymer products. Based on processing- reaction- structure- property correlations, geopolymer technology will be developed.

           (c) Dissertation and Thesis

Assessment and chemical remediation of soil contaminated by lead-acid battery waste in Lalupon, Oyo state, Lalupon. Ph.D. Thesis, University of Ibadan.