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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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REMOVAL OF HEXAVALENT CHROMIUM FROM ELECTROPLATING ...
REMOVAL OF HEXAVALENT CHROMIUM FROM ELECTROPLATING ...

in ,alkaline, to neutral medium, while they are oxidized to Fe3+ ions according to reaction (4): CrO 4 2-+ 3Fe2+ + 4H 2O + 4OH-→ 3Fe(OH) 3 + Cr(OH) 3 (4) Both, Fe3+ and Cr3+ ions combine with the generated OH- ions and precipitate as insoluble hydroxides. The Fe2+ ions can also reduce Cr 2O 7 2-ions in ,acidic, medium according to reaction (1), as already stated.

Improving the Electroplating Process Using pH Control ...
Improving the Electroplating Process Using pH Control ...

13/6/2017, · ,Electroplating Wastewater, Treatment. ,Electroplating wastewater, must be treated for toxic chemical removal before discharge to municipal sewers. Just as pH needs to be controlled in the ,electroplating, process to keep metal ions in solution, pH can also be used in ,wastewater, treatment to precipitate ions for removal via sedimentation and filtration.

REMOVAL OF HEXAVALENT CHROMIUM FROM ELECTROPLATING ...
REMOVAL OF HEXAVALENT CHROMIUM FROM ELECTROPLATING ...

in ,alkaline, to neutral medium, while they are oxidized to Fe3+ ions according to reaction (4): CrO 4 2-+ 3Fe2+ + 4H 2O + 4OH-→ 3Fe(OH) 3 + Cr(OH) 3 (4) Both, Fe3+ and Cr3+ ions combine with the generated OH- ions and precipitate as insoluble hydroxides. The Fe2+ ions can also reduce Cr 2O 7 2-ions in ,acidic, medium according to reaction (1), as already stated.

SOLUTION FOR WASTEWATER PROBLEM RELATED TO ELECTROPLATING …
SOLUTION FOR WASTEWATER PROBLEM RELATED TO ELECTROPLATING …

are toxic but valuable. Electroplating wastewater is variable in character and alkaline in nature. It gives rise to obnoxious smell. The color imparts visible pollution, which persist for long distance in river stream decreases recreation capacity of stream impairing self-purification, disturbed penetration of sun

Workplace Safety and Health Guidelines
Workplace Safety and Health Guidelines

Electroplating, waste has to be chemically reduced or oxidised prior to discharge ... Neutralisation of an ,acidic or alkaline, waste is the addition of acids or bases ... ,wastewater,. Neutralisation of an ,acidic, waste stream can cause precipitation of heavy metals.

Wastewater Treatment for the Industrial Metal Finishing ...
Wastewater Treatment for the Industrial Metal Finishing ...

Neutralization of ,wastewater, that is highly ,acidic, (low pH) or highly basic (high pH) is required for discharge to municipal sewer systems or to rivers and streams. The most common allowable pH range for discharge is generally 6 to 9 standard units (S.U.) but can be 5.0 to …

Treatment of Electroplating Waste -- Student Project
Treatment of Electroplating Waste -- Student Project

2000. A. Anusha: Some good books available on the ,treatment of electroplating waste, include: "Operation and Maintenance of Surface ,Finishing Wastewater, Treatment Systems" [affil. link to book on Amazon] and Water and Waste Control For the Plating Shop".For a much briefer treatment of the subject, there is coverage in the Metal ,Finishing, Guidebook, the "Products ,Finishing," Directory, and the ...

Wastewater treatment: a case study of electronics ...
Wastewater treatment: a case study of electronics ...

20/9/2018, · Among the various proposed methods of cyanide removal from ,electroplating wastewater, (Pulkka et al. 2014; Xu et al. 2015), ,alkaline, chlorination is considered as the most favorable option. ,Alkaline, chlorination has been used ever since 1889 when cyanide leaching was commercially established and became the most commonly applied technology for cyanide removal.

SOLUTION FOR WASTEWATER PROBLEM RELATED TO ELECTROPLATING …
SOLUTION FOR WASTEWATER PROBLEM RELATED TO ELECTROPLATING …

are toxic but valuable. ,Electroplating wastewater, is variable in character and ,alkaline, in nature. It gives rise to obnoxious smell. The color imparts visible pollution, which persist for long distance in river stream decreases recreation capacity of stream impairing self-purification, disturbed penetration of sun

Wastewater Treatment for the Industrial Metal Finishing ...
Wastewater Treatment for the Industrial Metal Finishing ...

Neutralization of ,wastewater, that is highly ,acidic, (low pH) or highly basic (high pH) is required for discharge to municipal sewer systems or to rivers and streams. The most common allowable pH range for discharge is generally 6 to 9 standard units (S.U.) but can be 5.0 to …

Characteristic Study of Electroplating and Dye Industrial ...
Characteristic Study of Electroplating and Dye Industrial ...

efficiencies is to be more than 90% but it is identified as the ,electroplating, and dye industries effluent had a low treatment efficiencies of about only 80-85%. And the ,electroplating wastewater, has more heavy metal which has more carcinogenic effects which causes various health problems. And also the effluent of dyes in ,waste water, concentration

Advanced Technologies in Electroplating and Effluent ...
Advanced Technologies in Electroplating and Effluent ...

Electroplating,, uses toxic chemicals and generates ... Aerated lagoons, ,Wastewater, stabilization ponds, Trickling filters, Anaerobic treatment ... • Spent ,alkaline, and ,acidic, etchants and cleaners • Spent strippers • Solvent degreasers • Waste and process bath treatment sludges

Wastewater: Industrial Metal Finishing
Wastewater: Industrial Metal Finishing

discharge. There are four main reasons to control the pH in ,wastewater,: 1. Protect human health and the environment; fish and other living organisms in rivers and streams. 2. Protect the ,wastewater, infrastructure from corrosion, especially from ,acidic wastewater,. 3.

Substitution of Zinc cyanide for electroplating
Substitution of Zinc cyanide for electroplating

The final selection between ,acidic or alkaline, zinc plating is mostly dependant on characteristics of the materials to be plated. Concrete costs of necessary technical equipment (,electroplating, baths, pipes, etc.) are a subject to change and depend on the scale of …

Electrochemical Treatment of Electroplating Wastewater ...
Electrochemical Treatment of Electroplating Wastewater ...

Various metals processing and finishing industries as electroplating produce large volume of wastewater that contain many kinds of toxic substance such as acid cyanide, alkaline cleaning agent, degreasing solvents, oil and fat and heavy metals.(2) Industrial effluents from electroplating industries contain hi gh amounts of heavy metal ions, such as chromium, nickel, copper, cadmium and zinc.

Substitution of Zinc cyanide for electroplating
Substitution of Zinc cyanide for electroplating

The final selection between acidic or alkaline zinc plating is mostly dependant on characteristics of the materials to be plated. Concrete costs of necessary technical equipment (electroplating baths, pipes, etc.) are a subject to change and depend on the scale of …

Electroplating wastewater - H2O
Electroplating wastewater - H2O

Thanks to the physical evaporation process, heavy metals and complexing agents are reliably separated from the ,electroplating wastewater, without the use of expensive chemicals. Our technology safely complies with even the strictest discharge limits. You can focus on what is really important: Your surface and ,electroplating, technology.

Wastewater: Industrial Metal Finishing
Wastewater: Industrial Metal Finishing

discharge. There are four main reasons to control the pH in ,wastewater,: 1. Protect human health and the environment; fish and other living organisms in rivers and streams. 2. Protect the ,wastewater, infrastructure from corrosion, especially from ,acidic wastewater,. 3.

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