Download or read book Prevention of Secondary Pollution Caused by Dredging Bottom Sediment Containing Mercury in Minamata Bay written by Yasuyuki Nakayama and published by . This book was released on 1992 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Minamata Bay, sediment containing 25 ppm mercury (about 1,500,000 m3) has accumulated on the bottom (about 2,110,000 M2), and the fish and shellfish in Minamata Bay are now polluted by mercury. Since October 1977, we have been dredging to provide a safe environment to ensure the inhabitants' health. We have restored Minamata Bay by dredging a part (about 1,500,000 m2) and using the other part (about 600,000 m2) as a disposal area. During dredging, we have guarded against secondary pollution. We have made sure that water quality did not deteriorate due to stirring of the bottom sediment or by soakage of mercury from the disposal area and that marine products were not further polluted. We have established several stations along the border of the working area and measured the concentration of mercury in seawater collected at these stations. The equipment for the analysis is located onsite so that we can get the results of the analysis immediately. If the analysis shows concentration over the allowed level, we stop or slow down the work at once and find the cause of the pollution. However, since the analysis for mercury is slow, we use the estimation method. This method measures the turbidity in seawater collected from stations in the work area for use as indicators of mercury; we then estimated the diffusion of mercury. In the first disposal area (dredging was carried out from June 1981 to March 1984), the estimation method was used and satisfactory results were obtained. In the second disposal area (dredging began in October 1982), we are also using the estimation method for the diffusion of mercury by dredging.
Download or read book Mercury Contaminated Sediment Disposal Work in Minamata Bay written by M. Hirose and published by . This book was released on 1992 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: To root out Minamata disease, which is representative of pollution-caused diseases, a large-scale sediment disposal work was conducted with special care to prevent the secondary pollution due to the work. The basic approach for disposal work consisted mainly of two kinds of ideas. One was to install boundary nets to prevent the mixing of contaminated fish in the Minamata Bay area and noncontaminated fish outside the Bay. The other was to dredge mercury contaminated sediment without disturbance and to confine it in the reclamation area, enclosed by highly watertight revetment. This work was commenced in 1977 and is going to be successfully completed in March of this year with the disposal of roughly 1.5 million cubic meters of sediment over a 2 million-square meter area.
Download or read book Treatment of Bottom Sediment Containing Mercury and Monitoring Method Using Fishes written by Y. Nakayama and published by . This book was released on 1992 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Minamata Bay, sediment containing mercury higher than 25 ppm has accumulated on the bottom, and dredging work continues. The dredging has been conducted carefully, and secondary pollution as a result of disturbance of the bottom sediment has been prevented. The mercury concentration in fishes was investigated to determine 'the conditions before dredging. As a result, a good correlation between the mercury concentration in fishes and the body length was found. Six kinds of fishes were chosen for monitoring. These were selected because they were present in sufficient numbers, the mercury concentration in them was adequate, and there was good correlation between mercury concentration and body length. The monitoring work has been successful, based on the results obtained.
Download or read book Management of bottom sediments containing toxic substances written by Spencer A. Peterson and published by . This book was released on 1977 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Management of Bottom Sediments Containing Toxic Substances written by and published by . This book was released on 1977 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mercury Pollution in Minamata written by Hisashi Yokoyama and published by Springer. This book was released on 2018-01-19 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is open access under a CC BY 4.0 license. It overviews the poisoning which occurred in the 1950s and 1960s among the residents in Minamata who ate seafood contaminated with methylmercury discharged from the chemical factory, Chisso Corporation. It describes the history, symptoms pathogenesis and research on the causal agent, and discusses the responses of Chisso and the national and local governments to the outbreak, the victims, the compensation and environmental restructuring as well as the court ruling on claims. Based on lecture notes from a university course, it includes students’ suggestions for avoiding a repeat of the tragedy. The issue has not been settled yet, and this analysis of the incident provides useful insights into solutions to the current global mercury pollution problem.
Download or read book Mercury Contamination written by P. A. D'Itri and published by Wiley. This book was released on 1977 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Good,No Highlights,No Markup,all pages are intact, Slight Shelfwear,may have the corners slightly dented, may have slight color changes/slightly damaged spine.
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1981 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mercury Contaminated Sites written by Ralf Ebinghaus and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: An up-to-date overview of the characterization, risk assessment and remediation of mercury-contaminated sites. The book summarizes, for the first time, works from Europe, Russia and the American continent, and review chapters are supplemented by detailed, international case studies.
Download or read book Hazard Assessment and Control of Environmental Contaminants in Water written by Saburo Matsui and published by Elsevier Science & Technology. This book was released on 1992 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: Addressing the problem of pollution by xenobiotics, this collection of papers includes coverage of chlorinated organics, pesticides, heavy metals and health risks, recent detection and monitoring methods, organic micropollutant detection and mutagens in environmental and drinking water.
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1992 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecological Research Series written by and published by . This book was released on 1977 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Winter Waterfront Year round Use in Metropolitan Toronto written by Xenia Klinger and published by . This book was released on 1991 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Cyanophage SAM 1 Upon Microcystis Aeruginosa written by D. L. Parker and published by . This book was released on 1977 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1726 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hazard Assessment and Control of Environmental Contaminants Ecohazard 99 written by Saburo Matsui and published by IWA Publishing (International Water Assoc). This book was released on 2000 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Ecohazard '99 conference brought together scientists, engineers, administrators and policy-makers from around the world who work in the fields of environmental and ecological toxicology to exchange the latest information on hazardous chemicals in the environment. There were a large number of contributions on endocrine disruption in ecosystems, possibly the hottest issue of the moment, but significant work was also reported on DNA-damaging chemicals, heavy metals and other environmental toxic substances. From the papers presented at the conference 48 have been selected for these proceedings. They focus on the following topics: detection of endocrine disruptors; detection of genotoxic contaminants; heavy metal and radionuclide contamination; PCDDs, PCBs and organochlorine contamination; ecological toxicity assessment; environmental risk assessment; hazardous contaminants in wastewaters; physico-chemical treatment of hazardous contaminants; biological treatment of environmental contaminants; and advanced analytical methods.
