Affiliation:
1. KWR Water Research Institute, POB 1072, 3430 BB Nieuwegein, The Netherlands
2. Water Utility Vitens, POB 1205, 8001 BE Zwolle, The Netherlands
Abstract
Abstract
Removal of iron(II) from groundwater by aeration and rapid sand filtration (RSF) with the accompanying production of drinking water sludge in the preparation of drinking water from groundwater, and chemical well clogging by accumulation of hydrous ferric oxide (HFO) precipitates and biomass after mixing of oxygen containing and of iron(II) containing groundwater, are identical processes. Iron(II) may precipitate from (ground)water by homogeneous, heterogeneous and/or biological oxidation, where the contribution of these processes, and thus the characteristics of the corresponding HFO precipitates, is a function of pH and process-conditions. Under current conditions in drinking water treatment, homogeneous oxidation dominates above pH ≈ 7.75, and heterogeneous and biological oxidation below this value. In chemical well clogging, this transition occurs at pH ≈ 7.0. This information is relevant for the optimization of removal of iron(II) from groundwater by aeration and RSF and the corresponding quality of the produced drinking water sludge, and for the operation of wells clogging by accumulation of HFO precipitates and biomass.
Subject
Health, Toxicology and Mutagenesis,Water Science and Technology,Environmental Engineering
Reference29 articles.
1. Bruins
J. H.
2016
Improved Manganese Removal From Groundwater. PhD thesis, UNESCO-IHE/Wageningen University, Delft, The Netherlands.
2. Kinetic study on clogging of a geothermal pumping well triggered by mixing-Induced biogeochemical reactions;EST,2019
3. Lithotrophic iron-oxidizing bacteria produce organic stalks to control mineral growth: implications for biosignature formation;ISME J.,2011
4. Die biologische enteisenung und entmanganung, verfahrenstechnik und betriebliche aspekte (Biological iron- and manganese removal, methods and operations);BBR,1997
5. Mikrobiologische Grundlagen von Enteisenung und Entmanganung, ein Verfahrensüberblick (Microbiological principles of iron- and manganese removal, a methods overview);Energie/Wasser-Praxis,2008
Cited by
6 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献