Mercury in the Atmospheric and Coastal Environments of Mexico

Technological Institute of Mazatlán, 757, Mazatlán, Sinaloa, 82000, Mexico, .
Reviews of environmental contamination and toxicology (Impact Factor: 3.63). 01/2013; 226:65-99. DOI: 10.1007/978-1-4614-6898-1_3
Source: PubMed
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    ABSTRACT: The healthcare sector is an important contributor to mercury (Hg) pollution because of the potential presence of mercury in thermometers, blood pressure cuffs, amalgams, etc. There are also other potential sources of mercury in this sector which are used frequently and in high volumes where the presence of the metal is not obvious and which might be collectively contributing to pollution. For instance, some chemicals used for the clinical diagnosis of illness may contain mercury. The goal of this study was to investigate potential sources of mercury pollution, which originate from clinical laboratory discharges, using an exploratory approach. The focus was on the residue generated during automatic analysis of patients' bodily fluids at a medical center in Hermosillo, Sonora, Mexico. This study shows an overview of what might be happening in the region or the country related to non-obvious sources of mercury in the healthcare sector. The results showed measurable levels of mercury in the residues coming from urine sediment analysis. These amounts do not exceed the maximum allowed by Mexican environmental regulations; nevertheless, the frequency and cumulative volume of residues generated, combined with the potential for persistence and the bioaccumulation of mercury in the environment, warrant attention. The work carried out in this study is being taken as a model for future studies for pollution prevention in the healthcare sector with the goal of measuring mercury emissions to the environment from clinical laboratory wastewater, including identifying sources which-while not obvious- could be important given the frequency and volume of their use in the clinical diagnosis.
    Environmental Monitoring and Assessment 05/2014; 186(9). DOI:10.1007/s10661-014-3787-5 · 1.68 Impact Factor
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    ABSTRACT: The main objective of this study was to evaluate the total mercury content in hepatopancreas and edible muscle of the whiteleg shrimp Litopenaeus vannamei cultured along the NW coast of Mexico, and to evaluate the potential human health risk due to their consumption. Samples were obtained between May and June 2010 in 26 shrimp farms from the three most important shrimp-producing states of NW Mexico, and total Hg was analyzed after reduction with SnCl2 in a mercury analyzer. The ranges of Hg concentrations of the hepatopancreas were 0.101±0.03-0.184±0.13μgg(-1) in Sonora, 0.077±0.055-0.813±0.363μgg(-1) in Sinaloa and 0.139±0.037-0.791±0.33μgg(-1) in Nayarit. In the muscle, values were from 0.078±0.02 to 0.539±0.09μgg(-1) in Sonora, 0.154±0.03-0.861±0.423μgg(-1) in Sinaloa and 0.121±0.041-1.48±0.44μgg(-1) in Nayarit. Considering the concentrations of Hg in the muscle and the national consumption rate, shrimp farmed in NW Mexico does not represent a risk for human health (HQ<1).
    Chemosphere 10/2014; 119C:1015-1020. DOI:10.1016/j.chemosphere.2014.08.079 · 3.50 Impact Factor