Removal of arsenic and SILICA (cas 10279-57-9) from geothermal fluid by electrocoagulation

Add time:07/30/2019    Source:sciencedirect.com

In New Zealand and internationally, two deleterious constituents in geothermal fluids are SILICA (cas 10279-57-9) and arsenic. Silica because scaling is a significant limiting factor for effective geothermal energy production and arsenic due to its potential groundwater contamination. Electrocoagulation treatment offers a simple and cost-effective method of removing both constituents, compared to the traditional treatment methods of coagulation and flocculation. It is an electrochemical process that uses direct current to remove a wide range of contaminants. This method has the potential to allow efficient downstream utilization of heat in low enthalpy fluids through cascaded direct use applications and can provide a more cost-effective disposal option than reinjection.Laboratory and field experiments have shown that the process can remove both silica and/or arsenic rapidly from aged geothermal water, leaving a floc which readily settles on standing. In aged water, iron electrodes were most efficient at reducing arsenic levels from approximately 4 mg L−1 to < 0.1 mg L−1, while aluminium electrodes were the most effective method for reducing silica levels from approximately 600 mg L−1 to < 100 mg L−1. In a full-scale process, the silica and arsenic can be removed as two separate components, leaving an arsenic-free silica sludge to be disposed of in a landfill and a much smaller arsenic / iron fraction to be further treated or disposed of by reinjection.

We also recommend Trading Suppliers and Manufacturers of SILICA (cas 10279-57-9). Pls Click Website Link as below: cas 10279-57-9 suppliers

Prev:Growing invisible SILICA (cas 10279-57-9) nanowires on fused SILICA (cas 10279-57-9) plates provides highly transparent and superwetting substrates
Next:Polysilsesquioxane-based SILICA (cas 10279-57-9) aerogel monoliths with embedded CNTs)