Corrosion and Scaling Analysis of Groundwater Resources of Hamedan Bahar Aquifer

Subject Areas : environmental management

Hamid Zare Abyaneh ¹ ()
Sayyedeh Elham Abdolsalehi ² ()
Azade Kazemi ³ ()

Received: 2009-01-09 Accepted : 2009-04-14 Published : 2010-06-22

Keywords: corrosion, Sediment, Langelier index, Rizener Index, Hamedan desert,

Abstract :

Water corrosion and scaling are one of the problems in qualitative management and directing of water distribution system. Rizener and Langelier Indices were used based on the chemical equilibrium between salts in the water to determinate level of corrosion and scaling Hamedan-Bahar groundwater resources. Results showed according to Langelier Index, amounts of corrosion and scaling for       64.25 % of ground water samples were low. Also based on Rizener index 85.2% of water samples had low potential of corrosion and scaling. Corrosion and scaling Qantas water resource were lower than underground water of wells. It might be due to removing of some soluble salts caused by cutting some part of water channel. Piper curve also showed that groundwater resources contain: calcite bicarbonate (70%), Sedic bicarbonate (15%), calcite sulfate (3%), Magnesium bicarbonate (6%), sedic sulfate (3%) and calcite chlorite (3%). Chemical composition of water showed scaling problem due to calcite bicarbonate, Sedic bicarbonate and variation in environment temperature. Physicochemical reactions of existed ions in the water with pipes can cause a weak corrosion for sediment which in turn plays a washing role. Overall results indicated that however, Hamedan-Bahar groundwater resources have low-medium corrosion and scaling potential, scaling in the distribution network is higher which causes reduction in the cross area and therefore head losses. So considering economic wastes, scaling in the network should be prevented as much as possible.