Our Offered Machines to you

Who are in extremely love with eco friendly system..

Removal of arsenic using hardened paste of Portland cement ...

Hardened paste of Portland cement (HPPC) has been used as a low-cost adsorbent for the removal of arsenic from water environment. Results from the batch experiments, conducted at an initial concentration of 0.2 ppm of arsenate, suggest arsenate removal up to 95%.

More

Technologies for Arsenic Removal from Water: Current ...

22/12/2015  This review paper presents an overview of the available technologies used nowadays for the removal of arsenic species from water. Conventionally applied techniques to remove arsenic species include oxidation, coagulation-flocculation, and membrane techniques.

More

Concrete/maghemite nanocomposites as novel adsorbents for ...

To combine the high capability of IO-NPs to remove arsenic from water, ... Then, 120.7 g of washed sand, 16.4 g of commercial Portland cement type I, and 8.2 g of magnetite NPs were mixed, and next 16 ml of deionized water were added. The resulted mixture was homogenized and kept in a closed vessel for 28 days at room temperature (RT).

More

Removal of arsenic from water using hardened paste of ...

Portland cement has been used as a new low-cost adsorbent for the removal of arsenic from the water environment. In the batch experiments conducted at an initial concentration of 0.2 mg l(-1) of arsenate, it was found that up to 95% of arsenate could be removed.

More

Arsenic Removal Technologies SSWM - Find tools for ...

The use of naturally occurring iron present in groundwater is a promising method of removing arsenic by adsorption, meaning that there is no need for adding chemicals. The iron precipitates formed by oxidation of dissolved iron has been found to remove arsenic by coagulation, adsorption, precipitation and filtration, but also by oxidation.

More

Environmental exposure to arsenic and chromium in an ...

20/3/2017  Abstract. Arsenic and chromium are widespread environmental contaminants that affect global health due to their toxicity and carcinogenicity. To date, few studies have investigated exposure to arsenic and chromium in a population residing in a high-risk environmental area.

More

Environmental exposure to arsenic and chromium in an ...

Arsenic and chromium are widespread environmental contaminants that affect global health due to their toxicity and carcinogenicity. To date, few studies have investigated exposure to arsenic and chromium in a population residing in a high-risk environmental area.

More

Physical, Chemical, and Biological Methods for the Removal ...

17/2/2014  The second approach uses aquatic rooted plants (i.e., Agrostis sp., Pteris vittata, Pteris cretica, and others) to remove arsenic from bed filters and from water [14, 21–23]. Yang et al. stated that the addition of arsenate reducing bacteria will promote the growth of P. vittata in soil.

More

Removal of arsenic from drinking water using rice husk ...

Rice husk adsorption column method has proved to be a promising solution for arsenic ... Treatments are required to remove arsenic and provide treated water for consumption. ... in this study the effective solidification was done through arsenic concentrates incorporated into Portland cement.

More

Efficiency of Arsenic Removal Unit Working in Bangladesh ...

Leaching tests of the arsenic rich iron sludge and the solidified sludge with cement indicates that arsenic leaching ratio of sludge ranges between 3 and 13 % and that of cement stabilized sludge is between 1 and 6 %. This means that the arsenic has a strong bond with the iron sludge and its treatment may not be difficult.

More

The Scientific World Journal - Hindawi

The Scientific World Journal is a peer-reviewed, Open Access journal that publishes original research, reviews, and clinical studies covering a wide range of subjects in science, technology, and medicine. The journal is divided into 81 subject areas.

More

US4446006A - Arsenic removal from hydrocarbons - Google ...

Elemental sulfur or aqueous sodium hydrogen phosphate is added to an arsenic-containing hydrocarbon, yielding a product hydrocarbon of reduced arsenic content. The process of the invention is particularly useful in the treatment of shale oils and other syncrudes containing relatively large concentrations of arsenic.

More

THE REMOVAL OF ARSENIC FROM DRINKING WATER BY ...

Robins, Nishimura and Singh : Removal of Arsenic from Drinking Water 35 2000) and is worthy of further study. ADSORPTION OF ARSENIC ON FERRIHYDRITE Over many years there has been much attention directed to the removal of arsenic from hydrometallurgical process solutions and waste waters by precipitation and co-precipitation with iron(III).

More

Frontiers Granulated Bog Iron Ores as Sorbents in ...

The main element of PbRS (passive (bio)remediation systems) are sorbents, which act as natural filters retaining heavy metals and carriers of microorganisms involved in water treatment. Thus, the effectiveness of PbRS is determined by the quality of the (ad)sorbents, which should be stable under various environmental conditions, have a wide ...

More

Arsenic: out of groundwater and into concrete ZDNet

Researchers have invented a system that filters arsenic out of water cheaply. They’re now working with cement and concrete companies to figure out a way to embed the resulting sludge in building materials. In Bangladesh and West Bengal in India, over 60 million people drink groundwater that’s

More

How to Clean Mold White Powder From Basement Walls eHow

While the white powder often found on basement walls and mold are caused by similar conditions, they are actually different materials. The white powder is efflorescence or minerals left behind as water that has flowed through the concrete walls evaporates. Mold is

More

How to Clean Mold White Powder From Basement Walls eHow

While the white powder often found on basement walls and mold are caused by similar conditions, they are actually different materials. The white powder is efflorescence or minerals left behind as water that has flowed through the concrete walls evaporates. Mold is

More

CLU-IN Contaminants > Arsenic > Treatment Technologies

Overview. Arsenic cannot be destroyed in the environment; it can only change its form or become attached to or separated from particles. It may change its form by reacting with oxygen or other molecules present in air, water, or soil, or by the metabolic action of of plants or animals.

More

Remove Stains from Concrete

Remove Stains from Concrete Most concrete stains can be removed quickly and easily, but a lot depends on how old the stain is and how porous the concrete surface is. Rust, oil, grease, paint or glue stains each have a recommended stain removal technique.

More

Arsenic Removal

The effects of various factors on arsenic removal in sintering process were studied and the optimal technique parameters were obtained. The results show that the mineral of iron ore with arsenic in South of China mainly is composed of magnetite and gangue, in which arsenic with 0.282% mass content exists as FeAsS and few as As 2 S 3.

More

Stabilization of arsenic-bearing solid residuals in ...

This research investigates the use of polymeric matrices to encapsulate solid sorbents used to remove arsenic from drinking water. Arsenic-containing granular ferric oxy/hydroxide and ferric hydroxide amended alumina residuals were encapsulated in a polymeric matrix using a novel aqueous-based manufacturing process.

More

Kanchan Arsenic Filter - Akvopedia

The Kanchan Arsenic Filter (KAF) is an adaptation of the biosand filter (BSF). It is based on slow sand filtration and iron hydroxide adsorption principles. The KAF has been designed to remove arsenic from drinking water, in addition to providing microbiological water treatment.

More

Arsenic Removal - Gadgil Lab for Energy and Water Research ...

ARUBA (Arsenic Removal Using Bottom Ash) was developed at Lawrence Berkeley National Laboratory to remove arsenic from contaminated drinking water in South Asia in an efficient, affordable, and safe manner. Using simple chemistry, bottom ash from coal-fired power plants is coated with ferric hydroxide to create ARUBA, to which arsenic binds.

More

A review on the existence of chrome in cement and ...

remove undesirable influences of Chrome in concrete. ... (manganese, mercury, lead and arsenic), the kidneys or liver (mercury, lead, cadmium and copper) or skin, bones, or teeth ... A review on the existence of chrome in cement and environmental remedies to control its effects S. Bodaghpoura, ...

More

How to remove a concrete slab Bunnings Warehouse

How to remove a concrete slab. ... of know-how. We’ll show you how to break up the slab into smaller pieces, cut through steel reinforcements, and then remove and dispose of the concrete properly. ... Health hazards may result from exposure to lead-based paints in older materials and copper chromium arsenic (CCA) ...

More

Laterite-A Potential Alternative for Removal of ...

Hardened paste of Portland cement (Kundu et al. 2004), activated red mud (Altundogan et al., 2002) are examples of some recent efforts proposed to remove arsenic from water. The aforementioned arsenic treatment technologies have been successfully applied to remove trace arsenic concentrations from contaminated water, but most

More

Utilization of Lapsi seed stone (Choerospondias Axillaris ...

polymer resins, iron oxides coated sand (Vaishya et al., 2003), cement (Kundu et al., 2005), activated alumina and activated carbon (Reed et al., 2000) Modifications of the known adsorbent are necessary for enhancing the efficiency of removing arsenic from arsenic contaminated ground

More

Superfund Record of Decision: Portland Cement (Kiln Dust ...

United States Office of Environmental Protection Emergency and Agency Remedial Response EPA/ROD/R08-92/056 March 1992 PB93-964410 v°/EPA Superfund Record of Decision: Portland Cement (Kiln Dust ------- ~J'. ~ NOTICE The appendices listed in the index that are not found in this document have been removed at the reQuest of the issuing agency.

More

Arsenic - Banglapedia

Arsenic brittle, greyish-white, semi-metallic element, symbol As, atomic number 33 and relative atomic mass 74.92. It occurs in many ores and occasionally in its elemental state, and is widely distributed, being present in minute quantities in the soil, sea and human body.

More

Stabilization of Arsenic-Bearing Iron Hydroxid Solid ...

necessary for cement curing) and cannot remove the added waste volume composed of benign ... chloride (NaCl) are passed through the column to return chloride ions to the resin and remove the arsenic ions. This process concentrates the contaminated water down to four ... Stabilization of Arsenic-Bearing Iron Hydroxid Solid Wastes in Polymeric ...

More

Tungsten: China looks to cement to solve APT waste issues ...

Roskill understands that in the short term, one solution for the slag stockpiles is to treat them to remove valuable metals and arsenic, then use the remaining material as filler in cement. Longer term, initial suggestions by the Academy of Environmental Sciences include technology to reduce molybdenum and arsenic in the APT feed material and controlling As in the smelting process.

More

Final Report: Limestone-Based Material for Arsenic Removal ...

Phase I clearly showed that HydroTech Engineering’s technology has the potential to reduce arsenic in drinking water at the source, and Toxicity Characteristic Leaching Procedure (TCLP) tests have indicated that the arsenic waste material is stable and can safely be disposed of in a landfill or incorporated into cement as aggregate.

More

Arsenic trioxide and underground issues at Giant Mine

Processing of the Giant Mine ore created arsenic trioxide dust as a by-product. Approximately 237,000 tonnes of the dust was produced and stored underground in 15 purpose-built chambers and mined-out stopes (open holes in the mine resulting from the extraction of minerals). The dust is about 60% arsenic.

More

Mineral trioxide aggregate - Wikipedia

Portland cement is an unsuitable substitute for MTA based on several characteristics that are essential to the performance: freedom from heavy metals, dimensional stability and fineness. The FDA requires dental materials to have high purity and be lead and arsenic-free, unlike commercial Portland cement.

More

of Arsen m Drinking Water to Sorre ments, and Zirconium ...

construction, and testing of a pressure sand filter to remove Mg(0H)z after it has sorbed arsenic from water, 2) stabilization of Mg(OH)2 as a Sorrel’s cement against reaction with carbonate that results in MgC03 formation decreasing the efficiency of Mg(OH)2 to sorb arsenic, and 3) the

More

CN103553197B - Method for removing arsenic and antimony in ...

The present invention is a method for removing slag smelting using industrial waste arsenic and antimony, in which the step of containing As> 10mg / L, Sb> 10mg / L of industrial waste water was added acid to adjust acidity, controlling pH = 0.5 ~ 4; added smelting slag and oxidizing agent, so that smelting slag in an acidic, oxidizing ...

More