Ecotoxicology, Ecological Risk Assessment and Multiple Stressors

Ecotoxicology, Ecological Risk Assessment and Multiple Stressors

Author: Gerassimos Arapis

Publisher: Springer Science & Business Media

Published: 2006-02-09

Total Pages: 376

ISBN-13: 1402044763

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The science of ecotoxicology and the practice of ecological risk assessment are evolving rapidly. Ecotoxicology as a subject area came into prominence in the 1960s after the publication of Rachel Carson's book on the impact of pesticides on the environment. The rise of public and scientific concern for the effects of chemical pollutants on the environment in the 1960s and 1970s led to the development of the discipline of ecotoxicology, a science that takes into account the effects of chemicals in the context of ecology. Until the early 1980s, in spite of public concern and interest among scientists, the assessment of ecological risks associated with natural or synthetic pollutants was not considered a priority issue by most government. However, as the years passed, a better understanding of the importance of ecotoxicology emerged and with it, in some countries, the progressive formalization of an ecological risk assessment process. Ecological risk assessment is a conceptual tool for organizing and analyzing data and information to evaluate the likelihood that one or more stressors are causing or will cause adverse ecological effects. Ecological risk assessment allows risk managers to consider available scientific information when selecting a course of action, in addition to other factors that may affect their decision (e. g. , social, legal, political, or economic). Ecological risk assessment includes three phases (problem formulation, analysis, and risk characterization).


Health Implications of Perchlorate Ingestion

Health Implications of Perchlorate Ingestion

Author: National Research Council

Publisher: National Academies Press

Published: 2005-04-18

Total Pages: 276

ISBN-13: 0309181356

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Perchlorateâ€"a powerful oxidant used in solid rocket fuels by the military and aerospace industryâ€"has been detected in public drinking water supplies of over 11 million people at concentrations of at least 4 parts per billion (ppb). High doses of perchlorate can decrease thyroid hormone production by inhibiting the uptake of iodide by the thyroid. Thyroid hormones are critical for normal growth and development of the central nervous system of fetuses and infants. This report evaluates the potential health effects of perchlorate and the scientific underpinnings of the 2002 draft risk assessment issued by the U.S. Environmental Protection Agency (EPA). The report finds that the body can compensate for iodide deficiency, and that iodide uptake would likely have to be reduced by at least 75% for months or longer for adverse health effects, such as hypothryroidism, to occur. The report recommends using clinical studies of iodide uptake in humans as the basis for determining a reference dose rather than using studies of adverse health effects in rats that serve as EPA's basis. The report suggests that daily ingestion of 0.0007 milligrams of perchlorate per kilograms of body weightâ€"an amount more than 20 times the reference dose proposed by EPAâ€"should not threaten the health of even the most sensitive populations.


Risk Assessment for Chemicals in Drinking Water

Risk Assessment for Chemicals in Drinking Water

Author: Robert A. Howd

Publisher: John Wiley & Sons

Published: 2007-11-09

Total Pages: 392

ISBN-13: 0470173378

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A comprehensive reference on state-of-the-art risk assessment methodologies for drinking water Risk Assessment for Chemicals in Drinking Water discusses the major steps and goals in risk assessments and suggests ways to improve the methodologies and accuracy, while consolidating up-to-date information on the current principles and practices in one authoritative reference. After an enlightening overview of risk assessment practices and regulatory guidelines, it: Includes descriptions of the use of variability analysis, exposure analysis, physiologically based pharmacokinetics, and modeling for both cancer and non-cancer endpoints Describes the practices of major organizations, including the U.S. EPA, Health Canada, World Health Organization, and California Office of Environmental Health Hazard Assessment Includes complete chapters on risk assessment for essential nutrients, arsenic, chloroform, and perchlorate Explains how to address susceptible sub-populations, including the elderly and infants and children, in risk assessments Covers the potential of using genomic and proteomic screens Addresses recent advances, emerging issues, and future challenges With contributions and perspectives from leading scientists, this is the definitive resource for health and environmental scientists, toxicologists, risk assessors and managers, regulators, consultants, and other professionals responsible for the safety of drinking water.


Perchlorate in the Environment

Perchlorate in the Environment

Author: Edward Todd Urbansky

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 299

ISBN-13: 1461543037

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Based on a symposium sponsored by the Environmental Division of the American Chemical Society, Perchlorate in the Environment is the first comprehensive book to address perchlorate as a potable water contaminant. The two main topics are: analytical chemistry (focusing on ion chromatography and electrospray ionization mass spectrometry), and treatment or remediation. Also included are topics such as ion exchange, phytoremediation, bacterial reduction of perchlorate, bioreactors, and in situ bioremediation. To provide complete coverage, background chapters on fundamental chemistry, toxicology, and reulatory issues are also included. The authors are environmental consultants, government researchers, industry experts, and university professors from a wide array of disciplines.


Mother Earth and Uncle Sam

Mother Earth and Uncle Sam

Author: Rena I. Steinzor

Publisher: University of Texas Press

Published: 2009-05-21

Total Pages: 282

ISBN-13: 0292773447

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In this compelling study, Rena Steinzor highlights the ways in which the government, over the past twenty years, has failed to protect children from harm caused by toxic chemicals. She believes these failures—under-funding, excessive and misguided use of cost/benefit analysis, distortion of science, and devolution of regulatory authority—have produced a situation in which harm that could be reduced or eliminated instead persists. Steinzor states that, as a society, we are neglecting our children's health to an extent that we would find unthinkable as individual parents, primarily due to the erosion of the government's role in protecting public health and the environment. At this pace, she asserts, our children will inherit a planet under grave threat. We can arrest these developments if a critical mass of Americans become convinced that these problems are urgent and the solutions are near at hand. By focusing on three specific case studies—mercury contamination through the human food chain, perchlorate (rocket fuel) in drinking water, and the effects of ozone (smog) on children playing outdoors—Steinzor creates an analysis grounded in law, economics, and science to prove her assertions about the existing dysfunctional system. Steinzor then recommends a concise and realistic series of reforms that could reverse these detrimental trends and serve as a blueprint for restoring effective governmental intervention. She argues that these recommendations offer enough material to guide government officials and advocacy groups toward prompt implementation, for the sake of America's—and the world's—future generations.


Ecotoxicology, Ecological Risk Assessment and Multiple Stressors

Ecotoxicology, Ecological Risk Assessment and Multiple Stressors

Author: Gerassimos Arapis

Publisher: Springer

Published: 2009-09-03

Total Pages: 360

ISBN-13: 9789048107421

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The science of ecotoxicology and the practice of ecological risk assessment are evolving rapidly. Ecotoxicology as a subject area came into prominence in the 1960s after the publication of Rachel Carson's book on the impact of pesticides on the environment. The rise of public and scientific concern for the effects of chemical pollutants on the environment in the 1960s and 1970s led to the development of the discipline of ecotoxicology, a science that takes into account the effects of chemicals in the context of ecology. Until the early 1980s, in spite of public concern and interest among scientists, the assessment of ecological risks associated with natural or synthetic pollutants was not considered a priority issue by most government. However, as the years passed, a better understanding of the importance of ecotoxicology emerged and with it, in some countries, the progressive formalization of an ecological risk assessment process. Ecological risk assessment is a conceptual tool for organizing and analyzing data and information to evaluate the likelihood that one or more stressors are causing or will cause adverse ecological effects. Ecological risk assessment allows risk managers to consider available scientific information when selecting a course of action, in addition to other factors that may affect their decision (e. g. , social, legal, political, or economic). Ecological risk assessment includes three phases (problem formulation, analysis, and risk characterization).