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Iron content in acid mine wastewater

Established in 2001, Puyang Zhong Yuan Restar Petroleum Equipment Co.,Ltd, “RSD” for short, is Henan’s high-tech enterprise with intellectual property advantages and independent legal person qualification. With registered capital of RMB 50 million, the Company has two subsidiaries-Henan Restar Separation Equipment Technology Co., Ltd We are mainly specialized in R&D, production and service of various intelligent separation and control systems in oil&gas drilling,engineering environmental protection and mining industries.We always take the lead in Chinese market shares of drilling fluid shale shaker for many years. Our products have been exported more than 20 countries and always extensively praised by customers. We are Class I network supplier of Sinopec,CNPC and CNOOC and registered supplier of ONGC, OIL India,KOC. High quality and international standard products make us gain many Large-scale drilling fluids recycling systems for Saudi Aramco and Gazprom projects.

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Iron content in acid mine wastewater
Removal of Fluoride from Geothermal Water by ...
Removal of Fluoride from Geothermal Water by ...

Abstract Removal of ,fluoride, from geothermal water ,by electrodialysis, (ED) was studied. ED operation was performed according to two methods. In the first method, before the ED operation, the pH of geothermal waters was adjusted to 7−7.5 by the addition of the HCl solution to prevent the precipitation of divalent salts in the concentrate compartment.

Ground Water Contamination with Fluoride and Potential ...
Ground Water Contamination with Fluoride and Potential ...

1/6/2012, · Use of electrodialysis plants in North Africa is employed in large scale water treatment of high fluoride brackish water for potable water supply . Electrodialysis is similar to Reverse Osmosis, except it uses an applied direct current potential instead of pressure, to separate ionic contaminants from water.

CA2533628C - System and method for treatment of acidic ...
CA2533628C - System and method for treatment of acidic ...

A ,wastewater treatment, system comprising separation unit operations inhibits or promotes the formation and precipitation of species by controlling the pH of ,wastewater, to be treated entering into the separation unit operations. The separation unit operations …

(PDF) Treatment of high fluoride concentration water by ...
(PDF) Treatment of high fluoride concentration water by ...

Several methods have been used to remove fluoride from water, such as adsorption (Zhang and Liang, 1992;Azbar and Turkman, 2000;Diaz-Nava et al., 2003), chemical precipitation (Reardon and Wang, 2000;Toyoda and Taira, 2000), electrodialysis (Amor et al., 2001), ion exchange (Castel et al., 2000) and electrochemical processes (Mameri et al., 1998;Shen et al., 2003).

Ground Water Contamination with Fluoride and Potential ...
Ground Water Contamination with Fluoride and Potential ...

1/6/2012, · Use of ,electrodialysis, plants in North Africa is employed in large scale water ,treatment, of high ,fluoride, brackish water for potable water supply . ,Electrodialysis, is similar to Reverse Osmosis, except it uses an applied direct current potential instead of pressure, to separate ionic contaminants from water.

Electrochemical technologies for wastewater treatment and ...
Electrochemical technologies for wastewater treatment and ...

EC or ECF processes are now used widely in the treatment of many types of wastewaters including dye and textile wastewater, 373–377 refractory oily wastewater, 378–380 municipal wastewater, 381–385 manufacturing wastewater, 386–388 and wastewaters with phenol, 389 toxic metals 390–393 and inorganic metals. 394–398 Bench and pilot-scale research studies on using EC and ECF technologies …

Hazardous waste treatment technologies - Wang - 2019 ...
Hazardous waste treatment technologies - Wang - 2019 ...

Under neutral or ,acidic, pH conditions and current density of 0.1 A, ,fluoride, was removed in 6 min, while nitrate was eliminated after 18 min. Gally et al. reported that ,electrodialysis treatment, of tertiary ,wastewater treatment, effluent reduced the electrical conductivity upon the removal of Cl −, Ca 2+, and Mg 2+ ions, without significant membrane fouling.

Removal of boron fluoride and nitrate by electrodialysis ...
Removal of boron fluoride and nitrate by electrodialysis ...

34 Membrane processes such as ,electrodialysis, (ED) are increasingly being utilised in water ,treatment, 35 to remove dissolved contaminants. A wide range of inorganic trace contaminants, including ,fluoride, (F-) and nitrate (NO 3 36 -), can be found in surface, brackish and groundwater. The occurrence and fate

Fluoride Removal from Aluminium Finishing Wastewater by ...
Fluoride Removal from Aluminium Finishing Wastewater by ...

In this study, fluoride-containing wastewater from the aluminium finishing industry was firstly treated by precipitation at pH 12.5, achieving residual fluoride concentrations of 8.69±1.84 mg/L from an initial concentration of 74.5±4.6 mg/L, and then by adsorption of the remaining solution onto hydroxyapatite (HAP), resulting in fluoride effluent concentrations of 4.09±0.16 mg/L.

Electrodialysis apparatus waste water treatment method ...
Electrodialysis apparatus waste water treatment method ...

In this method, an acidic gas containing hydrogen fluoride is subjected to gas/liquid contact and decomposition absorption with an (aqueous alkaline) absorbing solution and a wet scrubber, and the resulting waste water is sent to an electrodialysis apparatus, having an anion-selective permeable membrane, for dialytic treatment of the waste water.

Enhancing the Sustainability of Phosphogypsum Recycling by ...
Enhancing the Sustainability of Phosphogypsum Recycling by ...

Treatment of acidic wastewater via fluoride ions removal by SiO2 particles followed by phosphate ions recovery using flow-electrode capacitive deionization. Chemical Engineering Journal 2020, 400 , 125892. https://doi.org/10.1016/j.cej.2020.125892; Huixia Lu, Li Wang, Ryszard Wycisk, …

Design Manual: Removal of Fluoride from Drinking Water ...
Design Manual: Removal of Fluoride from Drinking Water ...

Both processes use a 1% (by weight) NaOH solution. The objective of regeneration is to remove as much ,fluoride, ions (and other co-contaminants) as possible from the media before returning the bed to the ,treatment, mode. ,Fluoride, ions lose their attraction (adsorptive force) and become repelled by the alumina when the pH rises above 10.5.

Electrochemical technologies for wastewater treatment and ...
Electrochemical technologies for wastewater treatment and ...

EC or ECF processes are now used widely in the ,treatment, of many types of wastewaters including dye and textile ,wastewater,, 373–377 refractory oily ,wastewater,, 378–380 municipal ,wastewater,, 381–385 manufacturing ,wastewater,, 386–388 and wastewaters with phenol, 389 toxic metals 390–393 and inorganic metals. 394–398 Bench and pilot-scale research studies on using EC and ECF technologies …

Technology to Remove Fluorides from Potable Water and ...
Technology to Remove Fluorides from Potable Water and ...

Principles of the Method. The method is an application of the patented product HYCOR FL, which is suitable for the removal of Fluorides in potable water production and in wastewater treatment through the following steps: Mixing of HYCOR FL in a well stirred reactor for a reaction time of 3 - 5 minutes.

A Limestone Reactor for Fluoride Removal from Wastewaters ...
A Limestone Reactor for Fluoride Removal from Wastewaters ...

30/6/2000, · A two-column limestone reactor has been designed to reduce ,fluoride, concentrations from wastewaters to below the maximum contaminant level (MCL limit) of 4 mg/L. The reactor functions by forcing calcite (CaCO3) to dissolve and fluorite (CaF2) to precipitate in the first column. The second column is not necessary to remove ,fluoride, but is used to precipitate the calcite dissolved in the first ...

Removal of Fluoride using Granular Activated Carbon and ...
Removal of Fluoride using Granular Activated Carbon and ...

Granular activated carbon (GAC) was chosen as baseline adsorbent and the ,fluoride, removal efficiency of the sewage sludge was compared with activated carbon. Anaerobically digested sludge was collected from ,wastewater treatment, plant near Asian Institute of …

Removal of Fluoride from Geothermal Water by ...
Removal of Fluoride from Geothermal Water by ...

Abstract Removal of ,fluoride, from geothermal water ,by electrodialysis, (ED) was studied. ED operation was performed according to two methods. In the first method, before the ED operation, the pH of geothermal waters was adjusted to 7−7.5 by the addition of the HCl solution to prevent the precipitation of divalent salts in the concentrate compartment.

Electrodialysis apparatus waste water treatment method ...
Electrodialysis apparatus waste water treatment method ...

In this method, an ,acidic, gas ,containing, hydrogen ,fluoride, is subjected to gas/liquid contact and decomposition absorption with an (aqueous alkaline) absorbing solution and a wet scrubber, and the resulting ,waste water, is sent to an ,electrodialysis, apparatus, having an anion-selective permeable membrane, for dialytic ,treatment, of the ,waste water,.

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