arsenic is one of the heavy metals and nearly all its compounds, especially organic compounds, are toxic. the wide spectrum of diseases caused by this element has led to evaluation of the toxicity of different arsenic species and identification of the major natural and anthropogenic pollution sources of it in the nature. mining activities are among the main sources of anthropogenic pollution of...

Contrary to the general trend of only a few actual trades occurring within point-nonpoint source water quality trading programs in the United States, two trading projects in the Minnesota River Basin, created under the provisions of National Pollutant Discharge Elimination System (NPDES) permits, have generated five major trades and numerous smaller ones. In this paper, these two projects are d...

Affected by the negative sequence component and harmonic component of three-phase grid, the conventional three-phase software phase-locked loop (SPLL) circuits were unable to extract the magnitude-phase information of three-phase fundamental positive sequence component accurately, and the dynamic response speed was slow. In order to solve this problem, this paper introduces T/4 time-lapse elimi...

Septic tanks without proper construction and insulation entail a significant risk to the environment. In this study, environmental impacts of permeably designed septic tank on shallow groundwater contamination are investigated, changes in water quality period after its elimination 2014 assessed. For purpose evaluating pollution level site, 10 monitoring wells were installed around 2012 long-ter...

In October 2010, nine ministries and commissions of China jointly issued Guidance on the Strengthening of Dioxin Pollution Prevention [Ministry of Environmental Protection of People's Republic of China (MEP) 2010], which requires key dioxin-emitting industries to carry out comprehensive actions to reduce dioxin emissions. This is a major historical milestone in China's fight against dioxin poll...

background: the ob­jective of this study was to find an appropriate approach to asymptomatic malaria in elimination setting through a systematic review. methods: a broad search was conducted to find articles with the words ‘malaria’ in their titles and ‘asymptomatic’ or ‘submicroscopic’ in their texts, irrespective of the type of study conducted. the cochrane, medline/pubmed, and scopus databas...

CONTEXT . China's rapid economic development has come at the cost of severe environmental degradation, most notably from coal combustion. Outdoor air pollution is associated with >300000 deaths, 20 million cases of respiratory illness, and a health cost of >500 billion renminbi (>3% of gross domestic product) annually. The young are particularly susceptible to air pollution, yet there has been ...

The global development of the world has an adverse affect on the natural environment, such as global warming, is continuing to mount. Green manufacturing systems that focus on minimizing environmental impact of manufacturing processes and products are ever more important to sustain our future. Green manufacturing systems are slow to gain acceptance as manufacturers are focusing more on implemen...