Suchergebnisse

A survey of 55 water vending machines in Chiang Khruea Sub-district, Mueang Mistrict, Sakon Nakon Province was conducted to evaluate the water quality from vending machines and environmental conditions of their locations. Laboratory analyses of the samples consisted determination of pH, turbidity, total solids, total dissolved solids, hardness, total coliforms, fecal coliforms, in addition to a survey of the general hygienic conditions of each location. The results showed that the turbidity value met the drinking water standard and the pH value baseline was in the range of 6.5-8.5. Some of the water samples exceeded the government's drinking water standard. Hardness values set by the Public Health Act of 1992, under the Department of Health are 100 mg/l or less as CaCO3. Total coliform bacteria were in the range 2-2,400 MPN/100 ml and fecal coliform bacteria were found to be 0‑2MPN/100 ml. Sanitation of the surroundings was evaluated according to six criteria. It was determined that there should be an improved level of recording and reporting as well as increased drinking water quality control. Maintenance and the hygienic condition of the machines were poor. Government regulators should control the entrepreneurs and monitor drinking water quality. Entrepreneurs should always maintain water quality standards according to government regulations.

"The story of water in the United States is one of ecosystemic disruption and social injustice. From the Standing Rock Indian Reservation and Flint, Michigan, to the Appalachian coal and gas fields and the Gulf Coast, low-income communities, Indigenous communities, and communities of color face the disproportionate effects of floods, droughts, sea level rise, and water contamination. In Hydronarratives Matthew S. Henry examines cultural representations that imagine a just transition, a concept rooted in the U.S. labor and environmental justice movements to describe an alternative economic paradigm predicated on sustainability, economic and social equity, and climate resilience. Focused on regions of water insecurity, from central Arizona to central Appalachia, Henry explores how writers, artists, and activists have creatively responded to intensifying water crises in the United States and argues that narrative and storytelling are critical to environmental and social justice advocacy. By drawing on a wide and comprehensive range of narrative texts, historical documentation, policy papers, and literary and cultural scholarship, Henry presents a timely project that examines the social movement, just transition, and the logic of the Green New Deal, in addition to contemporary visions of environmental justice."--

Introduction -- Constructing the environment in law: making it count -- Environmental water managers: examples of indirect legal personhood for rivers -- Just another user : environmental water managers in Australia -- Partnership as success: the EWMs of the western USA -- Competing narratives and the paradox of the EWMs -- Rivers as legal persons : competition and collaboration -- Legal rights for rivers : a cause for celebration or concern?

The book provides a cross-sectoral, multi-scale assessment of development-directed investigations in the main rivers of wider Central Asia and Afghanistan. The book highlights the development of river systems, water reservoirs, ecosystems and risks as well as the impact of climate change on water resources in Central Asian countries and Afghanistan. It provides information on the genesis of river basins, physical and chemical properties of water in rivers, and the hydrological regimes of the rivers of Central Asia and Afghanistan. The book is useful for scientists and researchers whose work focuses on rivers and the use of water resources, irrigation, ecosystems, risks, water supply, climate change and remote sensing, as well as for students and planners, administrations and other stakeholders in the water sector.

Coagulation-flocculation is an important step for the treatment of drinking water obtained from surface water sources. Various types of flocculants are available in the drinking water treatment market but only some of them are friendly for the environment due to their specific structure, which includes natural compounds. Starch-based flocculants are included in this category and some types of them were tested in our research work, in similar conditions with ordinary polyelectrolytes, in order to prove their efficiencies for turbidity and organic load (COD-Mn) removal. Five types of flocculants based on starch and acrylamide were tested during the classic treatment flow coagulation-flocculation-settling with aluminum sulfate as coagulant (1-10 mg Al/L) and 0.5-10 mL/L flocculant dose (0.2% active substance). Better removal efficiencies of turbidity and organic load (COD-Mn) in case of flocculants based on starch and acrylamide copolymers: over 99% for turbidity and ~90% for COD-Mn in case of 300-400 NTU initial surface water turbidity were registered.

The effective Law of Drinking Water and Drinking Water Supply determines legal, economic, and organizational principles of functioning drinking water supply system, which aims at the assured provision of population with high-quality and safe for human health drinking water.