manganese dioxide Articles
-
Degradation of amyl xanthate by manganese dioxide
Amyl xanthate (AX), a widely used reagent in sulfide mineral flotation, has caused serious environmental problems. Manganese dioxides (MnO2), ubiquitous in natural soils and sediments, are one kind of important oxidant or catalyst in facilitating organic pollutant decomposition. In this study, the oxidative degradation of AX by MnO2 was investigated in batch experiments. It was found that up ...
-
Adsorption of copper on tri-amino-functionalized mesoporous delta manganese dioxide from aqueous solution
A novel adsorbent, named tri-amino-functionalized mesoporous delta manganese dioxide (NNN-MnO2), was synthesized by bonding trimethoxysilyl propyl diethylenetriamine onto the surface of delta manganese dioxide (δ-MnO2) and used as a Cu(II) adsorbent in aqueous solution. The graft of silane coupling agent onto δ-MnO2 was verified by Fourier transform infrared spectroscopy. The ...
-
Enhanced coagulation: a viable option to advance treatment technologies in the South African context
Laboratory and full-scale experiments were conducted for enhancing the coagulation of stabilised surface waters with high organic content by permanganate preoxidation. It was indicated that permanganate preoxidation enhanced both the processes of coagulation and filtration of selected surface waters, River Songhua water, Qitaihe Reservoir water and Ba Reservoir water. Permanganate preoxidation is ...
-
Effects of sediment composition on cadmium bioaccumulation in the clam Meretrix meretrix linnaeus
Sediment particulates can be ingested by benthic animals, and the bioavailability of associated metals strongly depends on their speciation in the sediments. Different sedimentary components have distinct physiochemical characteristics and result in different biological responses from animals. Therefore, the bioaccumulation of particle‐bound trace metals may be different. In the present study, ...
-
The application of potassium manganate in water treatment
This paper explores the feasibility of using potassium manganate (K2MnO4) in water treatment. Manganate (Mn(VI)), like ferrate (Fe(VI)), can act as both an oxidant and a coagulant/adsorbent arising from the formation of insoluble manganese dioxide (Mn(IV)) from the chemical reduction of MnO42−. In this paper the basic properties of K2MnO4 are described, including the standard electrode potential ...
-
rGO/MnO2 nanowires for ultrasonic-combined Fenton assisted efficient degradation of Reactive Black 5
Reduced graphene oxide (rGO) coated manganese dioxide (MnO2) nanowires (NWs) were prepared by the hydrothermal method. Raman spectra confirmed the presence of rGO and the Brunauer–Emmett–Teller surface area of rGO/MnO2 NWs was found to be 59.1 m2g−1. The physico-chemical properties of prepared catalysts for the degradation of Reactive Black 5 (RB5) dye were investigated. 84% of RB5 dye in ...
-
Enhanced coagulation with
in situ manganese dioxide on removal of humic acid in micro-polluted waterThe morphology and surface characteristics of manganese dioxide (MnO2) formed in situ, which was prepared through the oxidation of MnSO4 using KMnO4, were studied. The effects of factors including the form of MnO2, dosage, pH, dosing sequence of in situ MnO2 on the enhanced coagulation were systematically evaluated. The results of analysis by the UV254 and permanganate index CODMn methods ...
-
The use of potassium permanganate, ozone and associated coupled processes for odor removal in drinking water: bench and pilot scale tests
Bench and pilot scale experiments were conducted to investigate and compare the preoxidation effects of potassium permanganate (KMnO4) and ozone (O3) for odor removal in drinking water. The effects of dosage, contact time, pH, as well as couple treatment with a granular activated carbon (GAC) filter were examined using bench experiments, while the effects of KMnO4 dosing points and a ...
-
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 ...
-
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 ...
-
Adsorption of Hg(II) from aqueous solution using functionalized hydrogel loaded with hydrous manganese dioxide particles
In this paper, a high performance adsorbent (hydrous manganese oxides onto acylamino and hydroxyl functionalized hydrogel) containing manganese oxide was prepared by the cross-linking polymer; the novel composite adsorbent has an excellent adsorption for Hg(II) removal. The adsorbent was characterized by scanning electron microscopy and Fourier transform infrared analysis, the hydrogel ...
-
On the removal of silver and antimony radionuclides from radioactive liquid waste by some classical means
After partial upgrading of a research reactor at the Pakistan Institute of Nuclear Science and Technology, Islamabad, some waste effluents having 110mAg and 124Sb with higher activity levels than the disposal limits piled up because the waste storage capacity was not yet enhanced. Experimental work was conducted to arrive at some optimum procedure for the treatment of the waste to ensure smooth ...
-
Catalytic oxidation and spectroscopic analysis of simulated wastewater containing acid chrome blue K by using chlorine dioxide as oxidant
An activated carbon-MnO2 catalyst was prepared by the dipping-calcination method using activated carbon as catalyst support. The catalyst was used for the catalytic oxidation of simulated acid chrome blue K wastewater. The COD removal efficiency and decolor efficiency by catalytic oxidation are 72.0% and 87.8%, respectively, at the condition of wastewater's COD is 2,418 mg/L, the optimum pH value ...
-
AQMS PILOT PLANT UPDATE: PLATING CELLS INSTALLATION AND MORE
Progress at Aqua Metals’ fully integrated lithium-ion pilot system, located at the company’s Innovation Center in the Tahoe-Reno Industrial Center in Nevada, continues at a rapid pace. Our copper, manganese dioxide, nickel and cobalt plating cells have been installed, as well as a leaching system, precipitation tank, filtration units, and holding tanks. Over the next few weeks we will ...
-
Reduction of the photocatalytic activity of ZnO nanoparticles for UV protection applications
The detrimental effects of UV radiation are having a significant impact on our life and environment. The development of effective UV shielding agents is therefore of great importance to our society. ZnO nanoparticles are considered to be one of the most effective UV blocking agents. However, the development of ZnO–based UV shielding products is currently hindered due to the adverse effects of the ...
-
Decoding the AdEdge treatment matrix
U.S. drinking water utilities come up against a variety of water quality issues. From aesthetic issues to naturally occurring contaminants and contaminants resulting from industry processing, no water source is without problems. Contrarily, many of them have co-occurring contaminants, which complicates the treatment process. Although there is no single treatment solution that will successfully ...
-
Arica Pago de Gomez, Chile - Case Study
Fast Facts Contaminant: Arsenic Flow Rate: 2.5 MGD In November 2011, AdEdge Water Technologies was contacted byXylem Inc to design, supply and start up an arsenic treatment system for Aguas del Altiplano in Pago de Gomez, Arica-Chile. The Pago de Gomez Water Treatment Plant added an arsenic treatment unit to its existing water treatment system. Aguas del Altiplano employed XylemInc to ...
-
City of Roswell, Georgia - Case Study
In late 2011, the United States Army Corps of Engineers (USACE) approved plans to install a new well and build a new water treatment facility for the City of Roswell, Georgia. Barlovento LLC was selected during a competitive bidding process to provide an iron and manganese removal system for the new water supply. AdEdge Water Technologies, LLC was contracted to design, manufacture, and commission ...
-
Talkeetna Water System, Alaska - Case Study
In late 2009, VEI Consultants contacted AdEdge Water Technologies to design, implement and startup an arsenic, iron, and manganese treatment system for the Talkeetna Water System in Talkeetna, Alaska. The existing water supply consisted of a well rated for 250 gpm with an arsenic level of 20 parts per billion (ppb). Iron and manganese levels were 0.04 mg/L and 0.10 mg/L respectively. The water ...
-
Project profile - Bois Forte reservation palmquist site – Minnesota arsenic, iron, manganese treatment
Background In May 2007, AdEdge Technologies, Inc. was selected by Indian Health Services to supply an arsenic, iron, and manganese treatment system for the Bois Forte Reservation – Palmquist Community Water System in Minnesota. The system has two wells that combine together to serve potable water to 50 connections in the tribal community. The system serves a population of approximately 150 ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you