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acidic gas field fracturing flow-back fluids discharge symptoms caused

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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acidic gas field fracturing flow-back fluids discharge symptoms caused
Recovery of chromium(VI) in wastewater using solvent ...
Recovery of chromium(VI) in wastewater using solvent ...

1/9/2020, · The chromium-containing industrial wastewater, as a type of, common widespread hazardous waste,, causes many environmental issues. This study aimed to develop a novel amide as extractant and evaluate its recovery of chromium(VI) in aqueous solutions.

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.

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] .

The adsorption of chromium (VI) from industrial wastewater ...
The adsorption of chromium (VI) from industrial wastewater ...

The adsorption of chromium (VI) from industrial wastewater by acid and base-activated lignocellulosic residues

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 …

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 …

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 ...

The treatment of chromium containing wastewater using ...
The treatment of chromium containing wastewater using ...

15/9/2017, · The electroplating wastewater containing Cr (VI) used in this study was obtained from an electroplating facility located in the, Eskisehir, Organized Industrial Zone,, Eskisehir,, Turkey. This medium sized plant produces faucets. The wastewater was taken from an effluent stream of an electroplating pool and transferred to the laboratory.

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.

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 ...

The adsorption of chromium (VI) from industrial wastewater ...
The adsorption of chromium (VI) from industrial wastewater ...

The adsorption of, chromium, (VI) from industrial wastewater by acid and base-activated, lignocellulosic residues

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.

The treatment of chromium containing wastewater using ...
The treatment of chromium containing wastewater using ...

15/9/2017, · The electroplating wastewater containing Cr (VI) used in this study was obtained from an electroplating facility located in the Eskisehir Organized Industrial Zone, Eskisehir, Turkey. This medium sized plant produces faucets. The wastewater was taken from an effluent stream of an electroplating pool and transferred to the laboratory.

(PDF) Photocatalytic treatment of industrial wastewater ...
(PDF) Photocatalytic treatment of industrial wastewater ...

Photocatalytic treatment of industrial wastewater containing chromium, as a model pollutant-effect on process parameters and kinetically studies. October 2012. Journal of Renewable and Sustainable ...

Methods of chromium and heavy metals removal from wastewater
Methods of chromium and heavy metals removal from wastewater

The reagent treatment of chromium containing wastewater restores the hexavalent chromium to trivalent and precipitates it. The reducing agents are sulfur (sodium sulfite, sodium bisulfite) copperas, scrap steel and others. In practice there are two methods of wastewater treatment to remove chrome:

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.

Application of Organic Coagulants in Water and Wastewater ...
Application of Organic Coagulants in Water and Wastewater ...

13/6/2018, · These include based aluminum metals (aluminum chloride, aluminum ,sulfate,, sodium aluminate) and iron based metals (,ferrous sulfate,, ferric ,sulfate,, ferric chloride) [13, 17, 18]. The addition of these coagulants to ,wastewater, undergo a series of reactions with the hydroxyl ions (OH − ) producing monomeric and polynuclear species.

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