Utmmy a classical procedure for preparing mcm

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ive group were used as precursors. The morphology and functional group present in the materials were analyzed using SEM and FTIR. The pore structure was investigated by a combination of X ray diffraction and nitrogen sorption measurement. The advantageous features of these materials were also discussed with respect to Hg(II) adsorption. Results reveal that these materials having sulphur atom (MCM-BTESPT and MCM-MPTMS) in their molecular structural framework contribute to higher Hg(II) adsorption capability. 92 3rd ICYC 2010 Universiti Sains Malaysia ENV-O11 23rd-25th June 2010 THE UBIQUITY OF CHEMICAL CONTAMINATION IN MARINE MAMMAL POPULATIONS: A LITERATURE REVIEW Jonah Bondoc Institute of Environmental Science and Meteorology, College of Science, University of the Philippines, Diliman Campus, Quezon City, Philippines E-mail: jlbondoc@yahoo.com This paper provides a detailed review of the current scientific literature to provide information on the anthropogenic contaminants, such as persistent organic pollutants (POPs), heavy metals and polycyclic aromatic hydrocarbons (PAHs) that are being detected in increasing quantities in various tissues (blubber, liver, kidney, muscles, brain) of marine mammals. Data correlating pollutant residues with altered reproductive and developmental states, nervous and digestive system problems, liver disease , contaminant induced immunosuppression, and endocrine system damage are reported for marine mammals. Worse yet is the alarming growth in cancer cases. Although not statistically significant, higher concentrations of dichlorodiphenyltrichloroethanes (DDTs) and polychlorinated biphenyls (PCBs) were found in males with a pattern of increasing with age. In females, they increased until sexual maturity, then decreased, and finally increased again in late life, thus suggesting the tendency of the mother to shift her contaminated burden to her calf during gestation and lactation. The data come from multiple sources. As continued research are being conducted on the toxicological effects of chemical pollutants on the health of marine mammals in other parts...
View Full Document

This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.

Ask a homework question - tutors are online