From an environmental perspective, arsenic is one of the most problematic chemicals emanating from geothermal systems. It is of concern when options are being considered for the disposal of waste geothermal fluids, scales and treatment sludges. Increasing the concentrations of arsenic in rivers or streams, or in the shallow groundwaters feeding them, adversely affects the quality of the water, and its ability to support healthy aquatic ecosystems and its use as a drinking or irrigation water.
We have experience in the geochemical behaviour and toxicity of arsenic in geothermal fluids and in freshwater environments, and how to assess likely the environmental effects from a natural or piped geothermal discharge. GEOKEM also has been involved in the optimization of arsenic removal from geothermal fluids.