Thermodynamic systems analysis Cr–As–H2O based on E–pH diagrams

Abstract

After studying the problem of environmental pollution, it was found that the most dangerous contaminant is arsenic. Due to the fact that the properties arsenates little studied, the analysis of published data showed that a growing need for thermochemical data from each year for new manufacturing processes involving arsenic compounds. This article first introduced the E–pH diagram of the system Cr–As–H2O at standard conditions (25 °C and 1 atm. Total pressure), where the range of existence of arsenate chromium, considered the chemi- cal and electrode reactions produce chromium arsenate compounds of chromium and arsenic. The outcome of the conclusion about the possibility of the use of chromium compounds to output arsenic from solution in the form of a soluble, stable chromium arsenate.