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Environmental protection of fracturing flowback fluid

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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Environmental protection of fracturing flowback fluid
Treatment and Management of Industrial Dye Wastewater for ...
Treatment and Management of Industrial Dye Wastewater for ...

Traditional coagulants include alum (aluminum ,sulfate,), ferric chloride (FeCl 3), or ,ferrous sulfate, (Fe 2 SO 4). Clean Air Act The first major environmental regulation passed in 1970 by the Environmental Protection Agency (EPA) that mandates standards on ambient …

Coagulation and Flocculation in Water and Wastewater ...
Coagulation and Flocculation in Water and Wastewater ...

Acid, alum formulations are aluminum ,sulfate, with 1 to 15-percent free sulfuric ,acid,. Their effectiveness with TOC removal applications is due to the enhanced depression of pH. TOC or NOM reductions depend on the type and dosage of coagulant, the pH, temperature, raw water quality and NOM characteristics.

Critical review of advanced oxidation processes in organic ...
Critical review of advanced oxidation processes in organic ...

1. Introduction. With socio-economic development, environmental pollution is a growing problem, especially organic ,wastewater, pollution (Rueda-Marquez et al., 2020).Organic pollutants in ,wastewater, pose a threat not only to water resources, but also to human health (Akpan and Hameed, 2011).The most common used ,wastewater, treatment technologies are divided into physical, chemical, and ...

Sulfuric acid | 7664-93-9
Sulfuric acid | 7664-93-9

Sulfuric acid, has many uses in different industries, such as fertilizer production, metal production, mineral processing, petroleum refining, ,wastewater, processing, etc. It is also used in the production of cleaning agents, dyes, pigments, drugs, detergents, and explosives. It is commonly used as the electrolyte in lead-,acid, batteries.

HCl Acid Recovery/Regeneration. Recycling pickling waste
HCl Acid Recovery/Regeneration. Recycling pickling waste

HCl Acid Recovery / Regeneration,. A discussion started in ... it to later co-precipitate other heavy metals in ,wastewater, treatment. This is costly because of the quantity of sludge produced by ... then there is one more technology to recover the iron and reuse the ,acid,, namely crystallization ,of ferrous sulfate, at low temperature. Lyle Kirman

40 CFR § 302.4 - Designation of hazardous substances ...
40 CFR § 302.4 - Designation of hazardous substances ...

Wastewater, treatment sludges from electroplating operations except from the following processes: (1) sulfuric ,acid, anodizing of aluminum, (2) tin plating on carbon steel, (3) zinc plating (segregated basis) on carbon steel, (4) aluminum or zinc-aluminum plating on carbon steel, (5) cleaning/stripping associated with tin, zinc and aluminum plating on carbon steel, and (6) chemical etching and ...

Chemicals in Water & Wastewater Treatment
Chemicals in Water & Wastewater Treatment

Chemicals in Water & Wastewater Treatment, Chemical Used for Precipitation 1. Aluminum ,sulfate, – Al 2 (SO 4) 3.18 H 2 O ... Carbonic ,acid, – H 2 CO 3 – Gas (CO 2) 7. Hydrochloric ,acid, – HCl 8. Sulfuric ,acid, – H 2 SO 4 ... ,Ferrous sulfate, oxidation -- c Filter fly control 0.1 – 0.5 Filter ponding control 1 ...

Industrial wastewater treatment - Wikipedia
Industrial wastewater treatment - Wikipedia

Wastewaters include acidic rinse waters together with waste ,acid,. Although many plants operate ,acid recovery, plants (particularly those using hydrochloric ,acid,), where the mineral ,acid, is boiled away from the iron salts, there remains a large volume of highly ,acid ferrous sulfate, or ,ferrous, …

CLU-IN | Technologies > Remediation > About Remediation ...
CLU-IN | Technologies > Remediation > About Remediation ...

Sulfate, is an alternate electron acceptor for microbial respiration in the absence of oxygen, nitrate, Mn, and ferric iron. Depleted concentrations of ,sulfate, relative to background indicate that the groundwater environment is sufficiently reducing to sustain ,sulfate, reduction …

Hydrometallurgical Recovery of Metals from Large Printed ...
Hydrometallurgical Recovery of Metals from Large Printed ...

29/9/2015, · The ,recovery, of precious metals ... culture in 1 L 9 K medium containing 45 g ,ferrous sulfate,, ... extraction from PCB ,wastewater, treatment sludge by sulfuric ,acid,. J. Hazard ...

The Kinetics of the Oxygenation of Ferrous Iron in ...
The Kinetics of the Oxygenation of Ferrous Iron in ...

Phosphate removal from industrial ,wastewater, through in-situ Fe2+ oxidation induced homogenous precipitation: ... Simultaneous ,recovery, and separation of uranium and rare earths from phosphoric ,acid, in a one-cycle extraction-stripping process. ... Oxidation ,of ferrous sulfate, in ,acid, solution by a mixture of sulfur dioxide and oxygen.

Industrial Wastewater Treatment | IWA Publishing
Industrial Wastewater Treatment | IWA Publishing

The two acids commonly used are hydrochloric ,acid, and sulfuric ,acid,. Wastewaters include acidic rinse waters together with waste ,acid,. Although many plants operate ,acid recovery, plants, (particularly those using Hydrochloric ,acid,), where the mineral ,acid, is boiled away from the iron salts, there remains a large volume of highly ,acid ferrous sulfate, or ,ferrous, chloride to be disposed of.

Sulphate Removal Wastewater Treatment Recycling in ...
Sulphate Removal Wastewater Treatment Recycling in ...

You mentioned sodium bisulfite, which is oxidized to ,sulfate,, and ,ferrous sulfate, being added. If there are no sulfates from other process chemistries, like a sulfuric ,acid, dip, then you may need to reduce the amount ,of ferrous sulfate, added as a coagulant, or change coagulants to something without sulfates, like ,ferrous, chloride, polyaluminum chloride, etc.

Decolorization of printing and dyeing wastewater ...
Decolorization of printing and dyeing wastewater ...

It is to use ferrous sulfate, polymeric ferric sulfate and other chemical agents with adsorption effect to remove colored dyes in wastewater by adsorption and precipitation. After the dye in the wastewater is treated by this method, it is mixed with the sludge in the water and separated by the sludge to achieve the decolorization effect.

Flocculants - an overview | ScienceDirect Topics
Flocculants - an overview | ScienceDirect Topics

Aluminum ,sulfate, or alum (Al 2 (SO 4) 3), ferric chloride (FeCl 3) and ferric ,sulfate, (Fe(SO 4) 3) are the most widely used ,flocculants, [1, 70]. These ,flocculants, have a long history of use in removing colloidal particles from water and ,wastewater, [15, 17] .

Renata Żyłła Application of Fenton Reaction Lech Kos and ...
Renata Żyłła Application of Fenton Reaction Lech Kos and ...

Ferrous sulfate, doses ranging from 100 to 1000 mg/dm3 and hy-drogen peroxide doses ranging from 2.5 to 10 cm 3/dm were applied. It was found that in the whole range ,of ferrous sulfate, doses, the degree of decolorisation was very high, reaching 97-99%. Consequently the ,wastewater, from the Fenton process was practically completely decolorised.

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