SciELO - Scientific Electronic Library Online

vol.38 issue5Isolation and identification of bacterial pollutants from the Berg and Plankenburg Rivers in the Western Cape, South AfricaGuide to groundwater monitoring for the coal industry author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand



Related links

  • On index processCited by Google
  • On index processSimilars in Google


Water SA

On-line version ISSN 1816-7950
Print version ISSN 0378-4738


RUNGVAVMANEE, Rapeepat  and  PHALAKORNKULE, Chantaraporn. Reduction of Langelier index of cooling water by electrolytic treatment with stainless steel electrode. Water SA [online]. 2012, vol.38, n.5, pp.825-830. ISSN 1816-7950.

The efficiency of electrolytic treatment in reducing the Langelier saturation index (LSI) of the cooling water from a cooling tower of a textile industry was investigated. Sacrificial anodes were employed which prevent obnoxious chlorine generation. A series of batch experiments using stainless steel electrodes were conducted with 4 different current densities (5, 7, 10 and 15 A/m2) and 6 different electrolysis times (20, 30, 40, 50, 60 and 70 min). The use of 7 A/m2 for 50 min electrolysis time yielded a satisfactory efficiency in reducing the LSI index from 2.57 to zero, indicating that the treated water was of sufficient quality to be reused in the cooling process.

Keywords : cooling water; electrolytic treatment; hardness; Langelier saturation index; water reuse.

        · text in English     · English ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License