Color Removal from Groundwater by Coagulation and Oxidation Processes

Jacek Leszczyński

Abstract

The paper concerns experimental research related to the removal of color and permanganate index (CODMn) in the presence of iron and manganese from underground water by means of coagulation and ozonation. The tests were carried out on a laboratory and technical scale in the real underground water treatment system. Ozone, as a strong oxidizing agent, was used to reduce the color intensity and to convert the iron Fe2+ and manganese ions Mn2+ to Fe(OH)3 and MnO2, respectively. In order to optimally remove the color to a value below 15 mg/L, the ozone dose of 3 mg/L was sufficient, which also ensured proper removal of iron and manganese, respectively by 94% and 83%. Ozonation under these conditions, however, did not provide sufficient removal of organic compounds expressed as CODMn below the assumed value of 3 mg/L. The effect of aluminum sulfate and polyaluminum chloride (PAC) was also studied, as a result of which it was found that polyaluminum chloride proved to be more effective reagent. In the technical conditions of water purification at a dose of 16 mg/L coagulant, the efficiency of color removal was 65.2% and CODMn – 50.8%, which ensured adequate values of the tested indicators in purified water below the permissible level
Author Jacek Leszczyński (FCEE / DTSEE)
Jacek Leszczyński,,
- Department of Technologies and Systems in Environmental Engineering
Journal seriesJournal of Ecological Engineering, ISSN 2299-8993, (N/A 40 pkt)
Issue year2019
Vol20
No9
Pages138-144
Publication size in sheets0.5
Keywords in Englishgroundwater treatment, color removal, coagulation, ozone
DOIDOI:10.12911/22998993/112497
URL http://www.jeeng.net/Color-Removal-from-Groundwater-by-Coagulation-and-Oxidation-Processes,112497,0,1.html
Internal identifierROC 19-20
Languageen angielski
LicenseJournal (articles only); published final; Other open licence; with publication
Score (nominal)40
Score sourcejournalList
ScoreMinisterial score = 40.0, 12-02-2020, ArticleFromJournal
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