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Fracturing flowback fluid environment

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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Fracturing flowback fluid environment
The reduction of hexavalent chromium by sulphite in wastewater
The reduction of hexavalent chromium by sulphite in wastewater

The results clearly indicated that sulphite would be a suitable reductant for Cr(VI) in ,wastewater under, specific conditions (2.0 ≤ pH(initial) ≤ 5.0 and [sulphite] = 5 x [Cr(VI)](initial)). …

Effect of Additive Material on Controlling Chromium (Cr ...
Effect of Additive Material on Controlling Chromium (Cr ...

Some researchers in previous studies have used some material to stabilize ,chromium,. Xue, T et al [] used calcium polysulfide (CaS5) and ,ferrous sulfate, (FeSO 4) for reducing Cr leachability from the soil.As a result, they found that CaS5 had a better effect than FeSO 4 on the stabilization of ,chromium,. Morales, C et al [] observed the effects of slag basicity (mass ratio CaO to SiO 2) and the ...

Ferrous and sulfide treatment of electroplating wastewater ...
Ferrous and sulfide treatment of electroplating wastewater ...

The invention is carried into effect by treating the contaminated wastewater with a combination of chemical treating agents which include the steps of adding ferrous ions and sulfide ions to bring about the simultaneous reduction of, hexavalent chrom,ium contaminants and the precipitation of heavy metal contaminants, such as, copper,,, cadmium, and, nickel,, in the form of a sludge in considerably lesser …

Lead dioxide | PbO2 - PubChem
Lead dioxide | PbO2 - PubChem

Remove all ignition sources. 2. Ventilate area of spill or leak. 3. For small quantities of liquids ,containing, inorganic lead, absorb on paper towels and place in appropriate container. 4. Large quantities of liquid ,containing, inorganic lead may be absorbed in vermiculite, dry sand, earth, or …

Treatment of oilfield wastewater by combined process of ...
Treatment of oilfield wastewater by combined process of ...

In the overall treatment process ,under, optimized conditions, the COD of oily ,wastewater, was reduced from 4,314 mg/L to 637 mg/L, and the COD removal efficiency reached 85.23%. The contribution of each stage is 68.45% (micro-electrolysis process), 24.07% (Fenton oxidation process), 7.48% (coagulation process), respectively.

Strategy for the advanced treatment of simulated tail ...
Strategy for the advanced treatment of simulated tail ...

19/2/2021, · Refractory organic pollutants in tail water of dyeing ,wastewater, treatment have aroused wide concern. Their efficient and cost-effective removal reduced their threat to public health and ecosystem. Herein, a novel short-cut photocatalysis/algal degradation-based hybrid technology was implemented in efficient removal of methylene blue (MB) in simulated tail water using reliable titanium dioxide ...

Simultaneous removal of chromium and arsenate from ...
Simultaneous removal of chromium and arsenate from ...

1/3/2011, · The presence of 10 µmol/L arsenate caused more significant decrease in No. 3 Simultaneous removal, of, chr,omium and arsenate, from contaminated groundwater by, ferrous sulfate:, Batch uptake behavior 379 chromium removal under neutral and alkaline conditions than that, under acidic conditions,, but the decrease could be alleviated by increasing Fe(II) dosage.

(PDF) Chemistry - Gilbert | Tín Phạm - Academia.edu
(PDF) Chemistry - Gilbert | Tín Phạm - Academia.edu

Academia.edu is a platform for academics to share research papers.

Hydroxyl Fe2+ and Acidithiobacillus ferrooxidans Jointly ...
Hydroxyl Fe2+ and Acidithiobacillus ferrooxidans Jointly ...

Thiobacillus ferrooxidans to oxidize ,ferrous sulfate, has been exploited in the process of bioleaching, treatment of ,acidic, mine drainage and removal of H2S from sour gases. Over the years, much attention has been paid to this organism and the process it catalyzes.

US4705639A - Ferrous and sulfide treatment of ...
US4705639A - Ferrous and sulfide treatment of ...

This method produces approximately, one-fourth the sludge generated, by the previously known, acidic reaction, treatment using only ferrous sulfide. The present invention involves a treatment technique...

Basic Engineering Chemistry | Sodium Carbonate | Calcium
Basic Engineering Chemistry | Sodium Carbonate | Calcium

BASIC. ENGINEERING CHEMISTRY, For B.E. Ist YEAR (Common to all Branches) [According to the latest Syllabus of Rajiv Gandhi Proudyogiki Vishwavidyalaya, Bhopal]. Dr. S.S. DARA Dr. A.K. SINGH M.Sc., Ph.D. M.Sc., Ph.D. Former Registrar and Director Head of the Chemistry Department Nagpur University, NAGPUR - 440 010 University Institute of Technology Rajiv Gandhi Proudyogiki Vishwa Vidyalaya …

Hexavalent Chromium Removal by Reduction with Ferrous ...
Hexavalent Chromium Removal by Reduction with Ferrous ...

The conventional remediation method of ,wastewater containing chromium, is reduction of Cr(VI) to less toxic Cr(III) by chemical reagents, and precipitation of Cr(III) in the form of Cr(OH) 3 at ...

How to treat - China Ferrous sulfate|Manganese sulfate ...
How to treat - China Ferrous sulfate|Manganese sulfate ...

The principle of this method is to reduce hexavalent chromium to trivalent chromium, under acidic condition, by adding reducing agent, ferrous sulfate,, and then, add, sodium hydroxide, calcium hydroxide, lime and others to adjust pH values to make it form trivalent chromium hydroxide precipitation from the, wastewater,.

Treatment of leather industrial wastewater via combined ...
Treatment of leather industrial wastewater via combined ...

Results indicate that increasing the ,ferrous sulfate, dose from 0.49 to 1.96 g/l increases the removal rate of COD, BOD, TSS, oil and grease, S 2− and TP. Consequently, the sludge volume and weight showed slight increase. The use of higher dose of ,ferrous sulfate, showed slight increase in the removal rate.

Removal of Solids from Palm Oil Mill Effluent and Paint ...
Removal of Solids from Palm Oil Mill Effluent and Paint ...

The highest removal efficiencies of 65% and 76% were obtained for POME and PW, respectively, at 3 Amps, 60min, pH of 10, and 50°C for POME and 3 Amps, 60min, pH of 6, and 60°C for PW. Of the two kinetic models studied, second-order kinetic model fitted best to the obtained ,experimental, kinetic ,data,.

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