Mineral Materials Coated with and Consisting of MnOx—Characteristics and Application of Filter Media for Groundwater Treatment: A Review

Michel, Magdalena M.; Reczek, Lidia; Papciak, Dorota; Włodarczyk‐Makuła, Maria; Siwiec, Tadeusz; Trach, Yuliia

doi:10.3390/ma13102232

Cited by 24 publications

(21 citation statements)

References 151 publications

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“…According to Michel et al [ 38 ], methods based on oxidation on the surface of the filter bed in the presence of MnO 2 are recommended because they reduce the addition of chemicals into the water, especially chlorine compounds, which prevents the formation of oxidation by-products.…”

Section: Resultsmentioning

confidence: 99%

Removing Iron and Organic Substances from Water over the Course of Its Treatment with the Application of Average and Highly Alkaline Polyaluminium Chlorides

Krupińska

2021

Molecules

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In topic-related literature pertaining to the treatment of water, there is a lack of information on the influence of iron ions in highly basic polyaluminum chlorides on the efficiency of purifying water with increased contents of organic substance. The aim of this work was to determine the changes in the content of organic substances as well as iron compounds in water intended for human consumption following unit treatment processes with particular attention paid to the coagulation process. As coagulants, polyaluminium chloride PAXXL10 with an alkalinity of 70%, as well as polyaluminium chloride PAXXL1911 with an alkalinity of 85% the composition of which also contained iron, were tested. The analysis of the obtained results showed that iron compounds and organic substances were removed to the greatest extent by the coagulation process, which also had a significant influence on the final efficiency of water treatment. The effectiveness of water treatment was determined by the type of tested polyaluminum chloride, which influenced the formation of iron-organic complexes. The reason behind the formation of colored iron-organic complexes during coagulation using PAXXL1911 coagulant was the high pH (approx. 8), at which the functional groups of organic substances, due to their dissociation, are more reactive in relation to iron, and possibly the fact of introducing additional iron ions along with the coagulant.

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Section: Resultsmentioning

confidence: 99%

Removing Iron and Organic Substances from Water over the Course of Its Treatment with the Application of Average and Highly Alkaline Polyaluminium Chlorides

Krupińska

2021

Molecules

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“…For the larger particle size larger than 100 μm, the removal was mainly due to the blocking [22] action of the separation medium. With the separation bed, the path of coal gasification wastewater passing through the separation bed increased, and the possibility of being blocked by the bed also increased [27]. Therefore, with the increase of separation bed, the grade efficiency of particle level tends to increase.…”

Section: Resultsmentioning

confidence: 99%

Removal of Solid Impurities from Coal Gasification Wastewater by Sand Filtration

Dai

Wang

2021

E3S Web Conf.

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Coal gasification wastewater has complex pollutant components and high COD value, and contains a variety of toxic and harmful substances. The treatment of coal gasification wastewater has always been one of the important problems in the development of coal gasification industry in China. In this paper, aiming at the removal of fine particle pollution in coal gasification wastewater, the sand filtration method was used to explore the changes of parameters such as solid content removal, separation accuracy, grade efficiency under the conditions of separating different bed thicknesses. With this separation method, the fine particle pollutants in coal gasification wastewater can be effectively removed by more than 95%, the separation accuracy can reach 0.46 μm. The operation conditions are optimized for further industrial application.

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“…Given that the reductive transformation of any dissolved species by electrons from the metal body is impossible [18,19,29], this study established that adding MnO 2 to Fe 0 /H 2 O systems should be regarded as creating a reactive Fe/Mn mineral mixture. The geochemistry of such mixtures is well-known to geochemists [9,10,30,31]. However, their suitability for decontaminating engineered systems is yet to be systematically investigated [30,31].…”

Section: The Operating Mode Of Fe 0 /Mno 2 Systemsmentioning

confidence: 99%

“…There are three main reasons: (i) added oxidizers are unstable solutions (e.g., H 2 O 2 ), (ii) oxidation enhancers are in limited quantity (e.g., bimetallic coating), and (iii) the enhancing capacity of the aggregate is limited (e.g., gravel, sand). In contrary, the addition of MnO 2 potentially creates a reactive Fe and Mn oxides mixture, for which long term reactivity is acknowledged but yet to be investigated [9,10].…”

Section: Introductionmentioning

confidence: 99%

The Suitability of Methylene Blue Discoloration (MB Method) to Investigate the Fe0/MnO2 System

Cao¹,

Alyoussef²,

Gatcha-Bandjun

et al. 2021

Processes

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The typical time-dependent decrease of the iron corrosion rate is often difficult to consider while designing Fe0-based remediation systems. One of the most promising approaches is the amendment with manganese dioxide (Fe0/MnO2 system). The resulting system is a very complex one where characterization is challenging. The present communication uses methylene blue discoloration (MB method) to characterize the Fe0/MnO2 system. Shaken batch experiments (75 rpm) for 7 days were used. The initial MB concentration was 10 mg L−1 with the following mass loading: [MnO2] = 2.3 g L−1, [sand] = 45 g L−1, and 0 < [Fe0] (g L−1) ≤ 45. The following systems where investigated: Fe0, MnO2, sand, Fe0/MnO2, Fe0/sand, and Fe0/MnO2/sand. Results demonstrated that MB discoloration is influenced by the diffusive transport of MB from the solution to the aggregates at the bottom of the test-tubes. Results confirm the complexity of the Fe0/MnO2/sand system, while establishing that both MnO2 and sand improve the efficiency of Fe0/H2O systems in the long-term. The mechanisms of water decontamination by amending Fe0-based systems with MnO2 is demonstrated by the MB method.

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Mineral Materials Coated with and Consisting of MnOx—Characteristics and Application of Filter Media for Groundwater Treatment: A Review

Cited by 24 publications

References 151 publications

Removing Iron and Organic Substances from Water over the Course of Its Treatment with the Application of Average and Highly Alkaline Polyaluminium Chlorides

Removing Iron and Organic Substances from Water over the Course of Its Treatment with the Application of Average and Highly Alkaline Polyaluminium Chlorides

Removal of Solid Impurities from Coal Gasification Wastewater by Sand Filtration

The Suitability of Methylene Blue Discoloration (MB Method) to Investigate the Fe0/MnO2 System

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