manganese removal Articles
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Removal of Mn2+ from water by bentonite coated with immobilized thin layers of natural organic matter
A bentonite-based composite was synthesized by applying thin coatings of natural organic matter onto bentonite particles in aqueous suspension. Natural organic matter, mostly comprised of humic acids, was isolated from peat by alkaline extraction. It was insolubilized and immobilized on bentonite by heating at 350 °C in an inert nitrogen atmosphere. The composite obtained was then used to remove ...
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Assessment of manganese removal from over 100 groundwater treatment plants
The aim of this study was to make an inventory of water quality and operational parameters which could affect manganese removal through aeration and rapid sand filtration and to establish correlations between these parameters and manganese removal efficiency. The focus of the overview was on manganese removal efficiency in the first aeration-filtration stage of conventional groundwater ...
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Filtration and manganese removal
Manganese removal through a filter bed is generally carried out and accepted by practitioners and researchers as occurring through catalytic oxidation at the surface of MnO2 coated media, although manganese passage through a coated media filter has been little investigated. To better understand the kinetics of Mn removal through a naturally coated filter, a pilot plant consisting of four filter ...
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Effectiveness of oxidative filter materials for manganese removal from groundwater
The experiments reported in this paper were conducted at a pilot plant consisting of filtration columns filled with oxidative filter materials. The installation was supplied with water containing manganese in concentrations ranging from 0.2 to 1.4 mg/L. The aim of the experiments was to determine the effectiveness of manganese removal on the three filter media as a function of their internal ...
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Interactions between ammonia, iron and manganese removal using pilot-scale biofilters
Pilot-scale biofilters treated with real groundwater were established to systemically investigate the interactions between ammonia, iron and manganese removal. When both of ammonia and manganese in influent were about 1 mg/L, they were quickly removed; but when manganese was above 3 mg/L, ammonia removal was affected significantly. When total iron was above 5 mg/L, the oxidization rate of ...
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Competitive mechanism of ammonia, iron and manganese for dissolved oxygen using pilot-scale biofilter at different dissolved oxygen concentrations
In this study, the competitive mechanism of ammonia, iron and manganese for dissolved oxygen (DO) in a biofilter was investigated, and a new start-up method of a biofilter for ammonia, iron and manganese removal was approved, which can effectively shorten the start-up period from 3–4 months to 51 days. The results demonstrated that when DO was sufficient (about 8 mg · L−1), ammonia, iron ...
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Iron and manganese removal from groundwater by filtration through a chalcedonite bed
The aim of this research was to determine the effectiveness of iron and manganese removal from groundwater using chalcedonite sand as a filter bed in rapid filtration. The experiment was conducted at a pilot plant. At the first stage of research, chalcedonite and silica sand were compared. The ripening time for manganese removal of chalcedonite was 27 days while silica sand was ripened within ...
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Transformation of an existing physicochemical plant for iron and manganese removal by the application of biological processes
A system for removing iron and manganese in groundwater, based on biofiltration technology, was developed at the Center of Sanitary Engineering of the National University of Rosario, Argentina. This process has been successfully applied in several new water treatment plants in Argentina. This paper describes the transformation of an existing plant for iron and manganese removal in groundwater ...
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Manganese oxidation and bacterial diversity on different filter media coatings during the start-up of drinking water biofilters
Manganese removal is a typical concern in drinking water production. Biofiltration may be used when treating groundwater sources but the onset of manganese removal in virgin biofilters can vary considerably. The aim of this study was to investigate the effect of different filter media on manganese oxidation and bacterial diversity in biofilters during the start-up. The onset of manganese ...
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Identification of the bacterial population in manganese removal filters
The aim of this study was to identify bacteria present in ripened manganese removal filters for drinking water production. The bacterial population was identified with ‘next generation’ DNA sequencing, and specific bacteria were quantified with quantitative polymerase chain reaction (qPCR) and characterized by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry ...
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Biological iron and manganese removal, pilot and full scale applications
Both manganese and iron are found in surface and ground waters at varying concentration levels. When present even at low concentrations they can be linked to the following problems: discolouration, turbidity and taste problems or form slime and iron noxide or manganese dioxide accumulations in pipes. Both metals promote the growth of certain types of chlorine tolerant micro-organisms in water ...
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Worthington Hills, Ohio - Case Study
AdEdge Water Technologies was contacted by Aqua Ohio to design, manufacture, and start up an iron and manganese removal system for the Worthington Hills community in Ohio. Worthington Hills had an iron concentration that fluctuated between 1.8 mg/L and 2.0 mg/L and a manganese concentration of 0.30 mg/L, well above the EPA secondary MCLs of 0.3 mg/L Fe and 0.05 mg/L Mn. The AdEdge treatment ...
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Biological drinking water treatment Hong Kong
The water treatment works takes water from the river Dongjiang in the Guangdong Province north of Hong Kong. The raw water has an average turbidity level of around 11 NTU and contents, among other things, ammonia and manganese. Water temperatures range from 12 to 34oC. During planning of the waterworks use of primary aerated biological filters (PABF) was selected for removal of ammonia and ...
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Case study - Hong Kong
To meet the forecasted increases in demand for potable water, the new Tai Po Water Treatment Works has been built in Hong Kong. The plant has a production capacity of 1200 Ml/day This solution strongly reduced the chlorine demand for the plant compared to the alternative execution with break point chlorina The water treatment works takes water from the river Dongjiang in the Guangdong Province ...
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Removal of manganese ions from synthetic groundwater by oxidation using KMnO4 and the characterization of produced MnO2 particles
The aim of this study is to investigate the conditions for the removal of manganese ions from synthetic groundwater by oxidation using KMnO4 to keep the concentration below the allowed level (0.05 mg/L). The process includes low-level aeration and addition of KMnO4 in a Jar test system with Mn2 + concentration of 0.50 mg/L, similar to that of natural groundwater in Taiwan. Different parameters ...
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Monitoring the effectiveness of advanced sorption materials for removing selected metals from water
There are a number of ways to remove heavy metals from water. Sorption on granular media based on iron oxides and hydroxides is currently the most used option. The experiment was carried out using sorption materials GEH, CFH 0818, CFH 12 and Bayoxide, which are primarily designed to remove arsenic from water. Four columns were prepared with an inner diameter of 4.4 cm for the purpose of the ...
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Project profile - City of Moulton, Texas arsenic, iron, manganese treatment system
Background AdEdge Technologies Inc. (AdEdge) was selected by the City of Moulton and Hejl, Lee, and Associates (HLA) to design a full-scale arsenic treatment project using its AD26 and Granular Ferric Oxide (GFO) adsorption technology. In addition to designing the system, AdEdge assisted HLA in obtaining a construction permit from the Texas Commission on Environmental Quality (TCEQ) for the ...
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Pennsylvania Water Utility Converts to Chlorine Dioxide - Case Study
Trial achieved reduced THMs, easier maintenance, and better water qualitySituation The central water treatment department saw a need to improve their trihalomethane (THM) levels, which are a byproduct of the disinfection process using chlorine. An engineering firm was hired to evaluate the use of chlorine dioxide, and International Dioxcide was chosen to execute a trial. The project approach was ...
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Impact of speciation on removal of manganese and organic matter by nanofiltration
The removal of manganese and humic acid (HA) by two nanofiltration membranes, TFC-SR2 and TFC-SR3, was investigated in order to highlight the influence of speciation on manganese and HA retention. Manganese speciation and complexation with HA were modelled to understand how speciation could affect NF removal mechanisms. The behaviour of the two membranes was dramatically different in terms of ...
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