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Electrolysis of potassium dichromate acid wastewater with iron electrode

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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Electrolysis of potassium dichromate acid wastewater with iron electrode
The Role of Arsenic in the Mining Industry
The Role of Arsenic in the Mining Industry

[8] Arsenic can also be leached out of some metal ores by cyanide or acid rock drainage but can be captured and removed from wastewater before it is released into the environment. [12] Arsenic is also present in coal used to generate electricity. When coal is burned, ash is produced which contains most of the naturally occurring arsenic.

Arsenic and Selenium Species in Petro Refinery Wastewater
Arsenic and Selenium Species in Petro Refinery Wastewater

13/10/2017, · The method was effective for studying the quantitative speciation of ,arsenic, and ,selenium species in petroleum refinery wastewater,, as shown in Figure 3. Figure 3.

Release Behaviors of Arsenic and Heavy Metals from Arsenic ...
Release Behaviors of Arsenic and Heavy Metals from Arsenic ...

sources of arsenic and produces a large amount of strongly acidic wastewater with high arsenic concentration [6–8]. In the smelting of copper or lead-zinc ore, large amounts of acidic wastewater are discharged when the gaseous emissions containing SO2, As, Cu, Pb, Zn and other impurities are washed with diluted acid.

Removal of arsenic from acid wastewater via sulfide ...
Removal of arsenic from acid wastewater via sulfide ...

1/11/2019, · To achieve a safe treatment of ,arsenic,-,containing acid wastewater,, a new process was proposed, including ,arsenic, removal via sulfide precipitation and hydrothermal mineralization stabilization. Under optimal conditions of sulfide precipitation, 99.65% of ,arsenic, from ,wastewater, was precipitated in the form of amorphous As 2 S 3.

(PDF) Research progress of arsenic removal from wastewater
(PDF) Research progress of arsenic removal from wastewater

The high arsenic wastewater is mainly arsenic-containing waste acid produced by smelting copper and other non-ferrous metals. The waste acid mainly comes from circ ulating cooling water, acidic...

Release Behaviors of Arsenic and Heavy Metals from Arsenic ...
Release Behaviors of Arsenic and Heavy Metals from Arsenic ...

sources of ,arsenic, and produces a large amount of strongly acidic ,wastewater, with high ,arsenic, concentration [6–8]. In the smelting of copper or lead-zinc ore, large amounts of acidic ,wastewater, are discharged when the gaseous emissions ,containing, SO2, As, Cu, Pb, Zn and other impurities are washed with diluted ,acid,.

Treatment of Arsenic in copper smelting
Treatment of Arsenic in copper smelting

arsenic trioxide, which is the basic raw materials for ,arsenic, chemicals; 2. Use the hazardous wastes ,containing, As to produce ,arsenic trioxide, while other valuable elements such as Cu, Zn and Pb, etc are recovered; 3. Reduce the stockpiling and discharge of As-,containing, residues such as calcium

REMOVAL OF ARSENIC FROM WASTEWATERS BY BATCH …
REMOVAL OF ARSENIC FROM WASTEWATERS BY BATCH …

This compound is absorbed from the gas flow leading into the sulphuric acid plant together with a variety of heavy metals, creating a highly acidic contaminated wastewater. Wastewater from copper smelters is acidic and contains typically considerable amounts of copper, lead, cadmium, zinc, …

Hydrothermal Treatment of Arsenic Sulfide Residues from ...
Hydrothermal Treatment of Arsenic Sulfide Residues from ...

Arsenic sulfide residue, (ASR), a by-product from the treatment of arsenic-bearing acidic wastewater, is abundantly generated but not properly disposed of in China. The utilization of such high-content arsenic waste residue is limited by the market.

Anticancer Activity of Small-Molecule and Nanoparticulate ...
Anticancer Activity of Small-Molecule and Nanoparticulate ...

Since Food and Drug Administration (FDA) approval of ,arsenic trioxide, (As2O3) for treatment of acute promyelocytic leukemia in 2000, it has become a front-line therapy in this indication. There are currently over 100 active clinical trials involving inorganic ,arsenic, or organoarsenic compounds registered with the FDA for the treatment of cancers.

Treatment of Arsenic in copper smelting
Treatment of Arsenic in copper smelting

arsenic trioxide, which is the basic raw materials for ,arsenic, chemicals; 2. Use the hazardous wastes ,containing, As to produce ,arsenic trioxide, while other valuable elements such as Cu, Zn and Pb, etc are recovered; 3. Reduce the stockpiling and discharge of As-,containing, residues such as calcium

REMOVAL OF ARSENIC FROM WASTEWATERS BY BATCH …
REMOVAL OF ARSENIC FROM WASTEWATERS BY BATCH …

This compound is absorbed from the gas flow leading into the sulphuric ,acid, plant together with a variety of heavy metals, creating a highly acidic contaminated ,wastewater,. ,Wastewater, from copper smelters is acidic and contains typically considerable amounts of copper, lead, cadmium, zinc, ,arsenic, …

Best Demonstrated Available Technology (BDAT) Background ...
Best Demonstrated Available Technology (BDAT) Background ...

The generalized production process involves oxidation of arsenic trioxide to arsenic acid and then reaction of the arsenic acid with an oxide or carbonate metal salt. The product precipitates from solution, is collected by filtration, and then is washed, dried, and packaged.

Arsenic Removal and Recovery from Copper Smelting ...
Arsenic Removal and Recovery from Copper Smelting ...

Abstract. Removal and recovery of high levels of ,arsenic, (As) in copper smelting ,wastewater, present a great environmental challenge. A novel approach was investigated for the first time using TiO 2 for As adsorptive removal from ,wastewater, and subsequent spent adsorbent regeneration and As …

OUTOTEC ROASTING SOLUTIONS
OUTOTEC ROASTING SOLUTIONS

all unwanted elements – such as ,arsenic, and antimony – before further treating the calcine. Special equipment is used for cooling and precipitating ,arsenic trioxide,, which can be produced to a very high purity. Most of our sulfating roasting plants are used for copper/ cobalt concentrate applications in combination with electrowinning.

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