by U.S. Environmental Protection Agency, Risk Reduction Engineering Laboratory in Cincinnati, OH .
Written in English
|Statement||Marc Y. Menetrez, David G. Anderson, and Edward P. Stahel.|
|Contributions||Anderson, David G., Stahel, Edward P., Risk Reduction Engineering Laboratory (U.S.)|
|The Physical Object|
Get this from a library! Manganese dioxide coated filters for removing radium from drinking water: project summary. [Marc Y Menetrez; David G Anderson; Edward P Stahel; Risk Reduction Engineering Laboratory (U.S.)]. As a con- trol, ^Ra-spiked Houston tap water was passed through a DE-coated filter without any MnO2 being added or present on the filter. This resulted in 15% radium removal, which was comparable with the removal of radium by pure DE filtration during the batch bench-scale experiments. Removal of Radium from Uranium Effluent by Manganese Oxide Coated Modified Bentonite (Mn-NaB) Article (PDF Available) in Mediterranean Journal of Chemistry 7(2) July with Reads. The presence of manganese dioxide "catalyses" the reaction. This has been recorded in the case of some plants operating at a high pH where, after a certain time operating with other oxidants, sand is coated with a MnO 2 deposit. However, this effect will not be enough to produce treated water that is completely manganese-freee.
These media can be classified into two groups: manganese dioxide– coated sand and manganese dioxide ore. All these media are similar in that they use a combination of chemical oxidation and catalytic media to remove iron and manganese in water. Different proprietary media have different specific mechanics, loading rates, backwashing requirements. Manganese is a widely occurring mineral substance with a key role to play in human nutrition. Yet manganese can also present a problem if found in well water in quantities greater than mg/ that case, manganese can give the water an unsightly brown appearance, while also often lending the water an unappealingly bitter taste. Manganese dioxide removes radium from water when competition for sorption sites and clogging of sites is reduced. Filter sand that is rinsed daily with dilute acid will remove radium from water. Manganese dioxide coated filter sorption removes radium but more capacity would be desirable. The radium selective complexer selectively removes radium with significant capacity if iron fouling is . A new adsorbent, manganese oxide coated zeolite (MOCZ), was characterized and employed for the removal of Cu(II) and Pb(II) from aqueous solution using batch equilibrium experiments. Scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), and BET analyses were used to observe the surface properties of the coated layer.
Manganese (Mn) in drinking water can cause aesthetic and operational problems. Mn removal is necessary and often has major implications for treatment train design. This review provides an introduction to Mn occurrence and summarizes historic and recent research on removal mechanisms practiced in drinking water treatment. Manganese is removed by physical, chemical, and biological . Research was conducted to provide a better understanding of the mechanisms of Mn(II) removal in oxide‐coated filters. The kinetics of Mn(II) sorption by MnO x (s)‐coated filter media were quantified as a function of solution pH, MnO x (s) surface concentration, and free chlorine concentration of the filter‐applied water. Rate of Mn(II) sorption was positively correlated to the number of. To remove iron and manganese from drinking water, treatment studies were carried out with chlorine and KMnO4 as oxidants. Alum and lime were added for coagulation and pH correction. The GreensandPlus Filter. H&T developed and patented the continuous regeneration process for iron and manganese removal in This process used a feed of chlorine and potassium permanganate upstream of a manganese greensand filter to keep the catalytic manganese dioxide coating of the manganese greensand media regenerated.