Multiple barrier or multiple risk?

Article Abstract:

Water treatment technology or the multiple barriers to public water contamination consist of sedimentation, filtration and chlorination. The process has been the accepted method for the most part of the 20th century. However, the water treatment and supply systems do not have 100% efficiency and they are always subject to risks of failure. Recent technological advances in the water treatment process may result in reducing the risk of failure. In the light of new developments and regulations, a reevaluation of previous assumptions should be conducted.

Editorial, Analysis, Water quality management

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Finite element modeling of single-solute activated-carbon adsorption

Article Abstract:

A computationally efficient algorithm for modeling single-solute activated-carbon adsorption in a fixed-bed reactor is presented that is accurate and stable on a wide field of system conditions. The semidiscrete Galerkin finite-element method (SDGFEM) proved to be a stable algorithm for predicting level of adsorption onto activated carbon for the removal of hazardous water organisms and used simple integration routines. The model was found to be affected by changes in film-transfer coefficient.

Research, Usage, Activated carbon, Adsorption, Finite element method, Carbon, Activated

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Closure

Article Abstract:

Constructed wetlands seem to be an effective method to treat iron-laden coal mine water from the Appalachian mines. These wetlands have shown remarkable performance even after decades of use. However, data on the use of wetlands to treat mine drainage are unavailable for other places aside from the Appalachians. Also, wetlands for removing iron from mine leachates may not be applicable for treating mine tailings with metalloids like arsenic and selenium.

Environmental aspects, Waste management, Coal industry, Constructed wetlands

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