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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472
EISSN: 1735-2630
Vol. 12, No. 7, 2015, pp. 2263-2272
Bioline Code: st15213
Full paper language: English
Document type: Research Article
Document available free of charge

International Journal of Environment Science and Technology, Vol. 12, No. 7, 2015, pp. 2263-2272

 en Crude oil and bioproducts of castor bean ( Ricinus communis check for this species in other resources L.) plants established naturally on metal mine tailings
González-Chávez, M. C. A.; Ruíz Olivares, A.; Carrillo-González, R. & Ríos Leal, E.

Abstract

Previous research suggested that Ricinus communis check for this species in other resources may be used for soil remediation and oil production. However, the quality of the oil and bioproducts under polluted conditions need to be tested to be assured of their potential use in biofuel production with environmentally friendly bioproducts (cake, seed coats and biomass). Oil characteristics and metal concentrations in oil, cake (deoiled seeds) and seed coats, as well as the shoot carbon content were analyzed. The oil contents of palmitic and oleic acids from plants growing in polluted mine tailings were comparable to those for plants grown under nonpolluted conditions. Linoleic acid content was significantly higher in oil of plants from mine tailings, which enriches the fuel properties. Cadmium and lead were mainly concentrated in the seed coat, whereas copper in the cake. Castor bean oil had low concentrations of cadmium, lead, zinc, nickel, manganese and copper-free. Cake and seed coats can be useful for soil fertilization applications since the metal concentrations are below safety regulations. The biomass carbon was around 43 %, which suggests it may be used for biogas production. These properties make castor bean valuable for its oil and bioproducts even when growing at metal-polluted sites. However, agronomic optimization is needed in order to produce higher plant productivity.

Keywords
Bioenergy crop; Castor bean; Energy plantations; Heavy metals; Polluted soils revalue

 
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