scholarly journals Deironing of Underground Water with Modified Refractory Chamotte

2021 ◽  
pp. 135-146
Author(s):  
Keyword(s):  
Iron Content ◽  
Iron Oxidation ◽  
Base Material ◽  
Precursor Solution ◽  
Underground Water ◽  
Iron Removal ◽  
Catalytic Material ◽  
Cis Countries ◽  
Permissible Rate ◽  
Iron And Manganese

Water from underground sources in Russia and the CIS countries mainly contains higher concentrations of iron and manganese. With a permissible rate of iron content in drinking water of 0.2–0.3 mg/L, its content in groundwater can reach 40 mg/L. To remove excess soluble iron, it is oxidized to insoluble forms. For these purposes, iron removal filters are used. This research describes the preparation of modified catalytic material to intensify the process of deferrization of underground water. Methods. Refractory chamotte of a fraction of 3–5 mm was selected as the base material, and an iron-containing precipitate of the purification of washings waters from iron removal filters was used as the source of iron for the preparation of the precursor solution. As a result of the modification, the formation of a finely dispersed and crystalline structure of hematite on the chamotte surface occurred. The effect of the dose of iron nitrate on the iron content on the surface of the modified material is established. Results. During pilot tests, it was found that an increase in the concentration of iron on the surface from 5.8 wt.% in the initial chamotte to 19.0, 48.7 and 55.8 wt.% in the modified led to an increase in the degree of iron oxidation from Fe2+ to Fe3+ from 41.4% to 65.1, 73.0 and 80.0%, respectively. The proposed method has significant advantages over analogues due to significantly lower energy consumption, resource consumption and impac on environmentt.

scholarly journals Magnesium Salt Influenced Strength Behavior of Lime-Fly Ash Stabilized Fine Grained Soil

2020 ◽  
Vol 26 (3) ◽  
pp. 373-378
Author(s):  
Zhirong JIA ◽  
Luxin FU ◽  
Lizhi WANG
Keyword(s):  
Fly Ash ◽  
Negative Impact ◽  
Base Material ◽  
Test Dose ◽  
Underground Water ◽  
Magnesium Salt ◽  
Material Strength ◽  
Fine Grained ◽  
Fine Grained Soil ◽  
Mgcl2 Solution

The fine grained soil subgrade in coastal areas has the characteristics of high underground water level and serious salinization, and the lime-fly ash stabilized soil (LFSS) often used as the road base material. In order to study the effect of magnesium salt on the material strength, 5 % MgCl2 solution was used to simulate the groundwater magnesium salt environment, and specimens with 7 d, 14 d, 28 d, 60 d and 90 d curing ages were tested in MgCl2 solution for 1 d, 5 d, 10 d, 15 d or 30 d. A controlled test was also conducted in purified water. Strength mechanism of LFSS was analyzed; SEM test was taken; and the influence mechanism of MgCl2 medium was analyzed. The results showed that MgCl2 medium, immersing time, and curing age have effects on compressive strength of LFSS. More specifically, although the early strength is low, the strength of LFSS maintains slow and steady growth from 7 d to 90 d. Long-term immersing in both MgCl2 solution and purified water will reduce the strength of LFSS, while the strength of specimen immersed in MgCl2 solution will decrease faster. Reactions between MgCl2 and LFSS destroyed the original gels and crystals, causing a negative impact on the strength of LFSS. However, with the test dose of MgCl2, the reduced strength of LFSS can still satisfy the sub-base requirement of second-class highway in China.

Iron and manganese present in underground water promote biochemical, genotoxic, and behavioral alterations in zebrafish (Danio rerio)

2019 ◽  
Vol 26 (23) ◽  
pp. 23555-23570 ◽  
Author(s):  
Katiuska Marins ◽  
Luan Marcos Valentini Lazzarotto ◽  
Gabrielle Boschetti ◽  
Kanandra Taisa Bertoncello ◽  
Adrieli Sachett ◽  
...  
Keyword(s):  
Danio Rerio ◽  
Underground Water ◽  
Behavioral Alterations ◽  
Iron And Manganese

scholarly journals KINDS OF ORGANIC MATTER AND CALCITE CONTRIBUTION ON THE CHANGE OF IRON AND MANGANESE IN SOIL AND UPTAKE BY MAIZE AT NORTH ACEH INCEPTISOL

2015 ◽  
Vol 2 (2) ◽  
pp. 124-131
Author(s):  
Khusrizal
Keyword(s):  
Organic Matter ◽  
Iron Content ◽  
Organic Material ◽  
Water Hyacinth ◽  
Soil Amendment ◽  
Combined Treatment ◽  
Cow Manure ◽  
Maize Crop ◽  
Randomized Design ◽  
Iron And Manganese

The Inceptisols is a soil in great amount and widely distributed in Indonesia, even in the province of Aceh Inceptisols is the most extensive amount. The Inceptisols were found from lowland up to highland, and their properties are very varied. Commonly, the soil fertility of the Inceptisols of lowland is low. Calcite and Organic Matter are the easy matter found, and to be considered as a better soil amendment. While maize is improved varieties of crops that its production constantly to be increased. This experiment was conducted in order to study the contribution of organic matter as well as calcite contribution to the change of iron and manganese in soil and uptake by maize at North Aceh Inceptisol. Kinds of organic matter that was used consist of cow manure and water hyacinth (60:40). The fully randomized design has been conducted that consists of two combined treatment factors with three replicated. The factor is related to the kinds of organic matter was 0.0, 2.0, 3.0 and 4.0 ton ha-1 and calcite was 0.0, 1.0 and 1.5 ton ha-1. The results showed that the application of organic matter and calcite significantly affect levels of iron and manganese in the soil and plants. Dose organic material 4 ton ha-1 and calcite 1.5 tons ha-1 are able to increase at the highest level of the iron content of the soil, while the dose of organic materials 4 ton ha-1 and calcite dose 0.0-1.0 tonnes ha-1 is the best for the increasing of manganese in the soil. The highest content of iron and manganese of maize crop was obtained at a dose of 6.0 tons ha-1 of organic matter without calcite application.

Effect of adsorption on filtration results of groundwater

2004 ◽  
Vol 4 (5-6) ◽  
pp. 157-163
Author(s):  
J. Sallanko ◽  
E. Lakso ◽  
M. Lehmikangas
Keyword(s):  
Hydrogen Peroxide ◽  
Organic Matter ◽  
Iron Removal ◽  
Iron Particles ◽  
Dissolved Iron ◽  
Oxidized Iron ◽  
Formed Precipitate ◽  
High Level ◽  
Dissolved Form ◽  
Iron And Manganese

Groundwaters in Finland are soft and acidic, and the main substances that require treatment are iron and manganese. Iron removal is usually relatively easy by oxidizing dissolved iron into an undissolved form either by aeration or chemical oxidization and removing the formed precipitate by sand filtration, for example. If the raw water contains high amounts of organic matter, problems may arise when using the traditional methods for iron removal. In Finland it is quite common that groundwater contains both high levels of iron and humus. The groundwater of Kukkala intake plant in Liminka has been found problematic due to the high level of organic matter and therefore this research studied the removal of iron from this water by means of oxidation with hydrogen peroxide and filtration. Iron was oxidized with hydrogen peroxide and when the dosage reached 3 mg l−1, all iron was in trivalent form, which means that nearly all of it was in undissolved form, i.e. in fractions greater than 0.45 μm. Oxidized iron particles were, however, very fine and they could not be removed by sand/anthracite filtration. However sand/anthracite filtration was able to remove iron well without the feed of oxidation chemicals, and the iron was then led to the filter in bivalent dissolved form, thus the filter operated as an adsorption filter.

Influence of Ammonia Nitrogen on Treatment of Groundwater Containing iron and Manganese in Aeration-Contact Oxidation Filtration Process

2012 ◽  
Vol 170-173 ◽  
pp. 2414-2418
Author(s):  
Yu Hua Zhao ◽  
Yan Feng Li ◽  
Wen Bo Zhang ◽  
Chun Na Zhang ◽  
Jin Xiang Fu ◽  
...  
Keyword(s):  
Water Treatment ◽  
Nitrogen Concentration ◽  
Great Influence ◽  
Ammonia Nitrogen ◽  
The Other ◽  
Iron Removal ◽  
Manganese Concentration ◽  
Filtration Process ◽  
Contact Oxidation ◽  
Iron And Manganese

Two different kinds of water were treated with aeration-contact oxidation filtration process. One was groundwater containing iron and manganese (GIM), the other was GIM polluted by ammonia (GAIM). The results showed that ammonia has almost no influence on iron removal, but has great influence on manganese. Under the condition of 1m/h filter velocity and 10 mg/L average ammonia nitrogen concentration of inlet，the outlet manganese concentration for GAIM was less than 0.1 mg/L after 315 days. When temperature dropped to 18°C below, the manganese concentration of effluent exceeded 0.1 mg/L. When average ammonia nitrogen concentration of inlet for GAIM dropped to 3.27 mg/L, the manganese concentration of outlet for GAIM was less than 0.1 mg/L in winter. And for GIM, the manganese concentration of outlet was less than 0.1 mg/L only after 52 days. Although the filter velocity increased gradually from 1 to 7 m/h, the manganese concentration of effluent was always less than 0.1 mg/L. Therefore, ammonia pollution in the groundwater greatly increases the difficulty of water treatment.

scholarly journals Removal of iron and manganese from groundwater: a study of using potassium permanganate and sedimentation

2018 ◽  
Vol 162 ◽  
pp. 05018 ◽  
Author(s):  
Mohamed Elsheikh ◽  
H. Guirguis ◽  
A. Fathy
Keyword(s):  
Potassium Permanganate ◽  
Conventional Treatment ◽  
Iron Removal ◽  
Manganese Removal ◽  
Removal Process ◽  
Iron And Manganese

Experiments are done for different combinations of Fe+2 and Mn+2 concentrations. The obtained results show that Potassium Permanganate (PP) gives good results in iron and manganese removal. By using PP dose near to half of the theoretically required one, it can remove up to 100 % and 90 % of iron and manganese, respectively over different tested concentrations at pH=7.0. Increasing rate of filtration influences the Mn+2 removal process obviously. Sedimentation is required when combined concentrations of iron and manganese are greater than 5.0 ppm to reduce filter rapid clogging. Using conventional treatment with adding alum, flocculation, sedimentation and filtration can remove up to 97% and 18% of iron and manganese, respectively. Using PP in addition to alum enhances manganese removal but decreases iron removal. However, using alum with increasing pH to 10 leads to 100 % and 95 % of Fe+2 and Mn+2 removal and increases filter working period.

An Engineering Example of Removing Iron and Manganese from Underground Water

2014 ◽  
Vol 508 ◽  
pp. 251-254
Author(s):  
Yu Li ◽  
Ya Feng Li
Keyword(s):  
Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Underground Water ◽  
Design Parameters ◽  
Main Process ◽  
Processing Capacity ◽  
Process Characteristics ◽  
Operation Cost ◽  
Iron And Manganese

Use water supply treatment engineering of Shenyang some water treatment plant as an example. Introduced process characteristics, design parameters, treatment effect and operation cost of treating iron and manganese of underground drinking water. This water treatment plant treat the underground water as the source, and the processing capacity of water of this engineering is 105t/d. This underground water turns out to be abundant and clear. Therefore, the main process of the water treatment plant is decresing the content of iron and manganese in the underground water.

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