Decontamination of industrial cyanide-containing water in a solar CPC pilot plant

作者：Duran A^*; Monteagudo J M; San Martin I; Aguirre M

来源：Solar Energy, 2010, 84(7): 1193-1200.

DOI：10.1016/j.solener.2010.03.025

• Cyanides
• Mineralization
• Photocatalysis
• TOC
• UV radiation

The aim of this work was to improve the quality of wastewater effluent coming from an Integrated Gasification Combined-Cycle (IGCC) power station to meet with future environmental legislation. This study examined a homogeneous photocatalytic oxidation process using concentrated solar UV energy (UV/Fe(II)/H(2)O(2)) in a Solar Compound Parabolic Collector (CPC) pilot plant The efficiency of the process was evaluated by analysis of the oxidation of cyanides and Total Organic Carbon (TOC) A factorial experimental design allowed the determination of the influences of operating variables (initial concentration of H(2)O(2), oxalic acid and Fe(II) and pH) on the degradation kinetics Temperature and UV-A solar power were also included in the Neural Network fittings The pH was maintained at a value >9 5 during cyanide oxidation to avoid the formation of gaseous HCN and later lowered to enhance mineralization Under the optimum conditions ([H(2)O(2)]= 2000 ppm, [Fe(II)] = 8 ppm. pH = 3 3 after cyanide oxidation, and [(COOH)(2)] = 60 ppm), it was possible to degrade 100% of the cyanides and up to 92% of Total Organic Carbon.

• 出版日期2010-7