Showing papers in "Research Journal of Environmental Toxicology in 2009"

Effect of Fertilizers (Activators) in Enhancing the Microbial Degradation of Endosulfan in Soil

Abstract: The effect of fertilizers activators on microbial growth and capability in degrading IX and p-endosulfan was studied by incubating, two groups of microorganism in the presence and absence of four fertilizers (urea, triple super phosphate, urea + triple super phosphate and cow manure) for 45 days with sample drown every 15 days. Drawn sample were examined for microbial growth, concentration of starting material remained and a mount of sulphate generated. Results indicated that all activators caused significant increase in microbial counts especially the triple super phosphate followed by urea + triple super phosphate, cow manure and urea. Significant reduction in halflives of IX and p-endosulfan accompanied with various level of sulphate generation was noticed. Since, the microorganism studied have shown great potential in degrading endosulfan therefore any enhancement in their numbers and activity (caused by activator) will no doubt promote their capability in degrading endosulfan in soil.

Persistent organic chemicals in Malaysian waters: a review.

Abstract: A critical review of the levels of persistence organic chemicals in Malaysian waters from 1980 to 2002. This review concentrated on the detection several toxic substances by groups of scientists in the marine environment, evaluated their quantities and provides estimates of their potential danger for the health of both marine life and humans. The compounds include polycyclic aromatic hydrocarbons, tributyl-tin and pesticides. In summary, the levels of some persistent organic chemicals is lower compared with other Southeast Asia countries and the levels in this region still at the medium level compared with more urbanized and industrialized regions in the West. Nevertheless, continuous monitoring and investigations on the level of the persistent organic chemicals are needed in Malaysia. Transboundary pollution potential should be taken as an important consideration in any development project especially in Southeast Asia.