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National standard 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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National standard of fracturing flowback fluid
Perchloric acid | HClO4 - PubChem
Perchloric acid | HClO4 - PubChem

PERCHLORIC ACID,, WITH NOT MORE THAN 50% ,ACID, is a solution of a strong oxidizing ,acid,. May react vigorously or deflagrate when mixed with oxidizable material [Merck]. This includes (but is not limited to) alcohols, amines, boranes, dicyanogen , hydrazines, hydrocarbons, hydrogen , nitroalkanes, powdered metals, silanes, or thiols [Bretherick 1979. p.174].

Surface Treatment Chemical Products
Surface Treatment Chemical Products

Electrolytic stripper for stainless steel racks. Low concentration type. The chance of stray current corrosion of basis material is very slim. Plating film of almost all kinds of metal like copper, nickel, and chromium may be stripped. Wastewater treatment is relatively easy. ST-420 ST-421 Acetic acid 20L 20L 100mL* 20mL* pH adjustment 30-60 Application & Features

Biosorption of Chromium (VI) from Industrial Effluent ...
Biosorption of Chromium (VI) from Industrial Effluent ...

Biosorption of ,Chromium, (VI) from Industrial Effluent using Neem Leaf Adsorbent ... ,wastewater, include reduction 1, reduction followed by ... reverse osmosis 8, and ,electrolytic, methods. This has prompted the use of natural materials as adsorbents in order to develop cheaper alternatives. Bio …

The SW-846 Compendium | Hazardous Waste Test ... - US EPA
The SW-846 Compendium | Hazardous Waste Test ... - US EPA

EPA’s ,SW-846 Compendium, consists of three main parts—chapters, methods and supporting documents. Most methods are intended as guidance, with the exception of method defined parameters (MDPs) that are mandated by the RCRA regulations. The chapters provide insight on how to successfully use the test methods.

PFOS Chromium Electroplater Study US EPA Region 5
PFOS Chromium Electroplater Study US EPA Region 5

containing an ,electrolytic, salt solution. ... Prior to sampling, field investigators conducted telephone surveys of ,chromium, electroplating and chromic ,acid, anodizing facilities to determine the best candidates. ... sample their ,wastewater, discharge as part of the project.

Electrochemical Reactors for Wastewater Treatment ...
Electrochemical Reactors for Wastewater Treatment ...

In wastewater practice these are frequently used for small to medium wastewater volumetric flow rates up to approx. 500 m 3 d −1, e.g., oil production, washing water for cars, process water for the textile and chemical industry.

40 CFR Appendix C to Part 438 - Metal-Bearing Operations ...
40 CFR Appendix C to Part 438 - Metal-Bearing Operations ...

Common electrolytes include sodium hydroxide and combinations of sulfuric acid, phosphoric acid, and chromic acid. Wastewater generated during electropolishing includes spent process solutions and rinses.

Resource Recycling of Mn-Rich Sludge: Effective Separation ...
Resource Recycling of Mn-Rich Sludge: Effective Separation ...

Groundwater treatment sludge (GWTS) is a Mn-rich waste and precipitated from backwash ,wastewater, of groundwater treatment plants. Approximately, 5 t of sludge is generated in treatment plants with a production of 80,000 m 3 /d. The sludge contains 5.4–8.5 wt % of Mn and is usually dumped directly into the river or sea without disposal. With such disposal, the sludge was precipitated on the ...

40 CFR § 136.3 - Identification of test procedures. | CFR ...
40 CFR § 136.3 - Identification of test procedures. | CFR ...

10 EPA Methods 608.1, 608.2, 614, 614.1, 615, 617, 619, 622, 622.1, 627, and 632 are found in Methods for the Determination of Nonconventional Pesticides in Municipal and Industrial ,Wastewater,, EPA 821-R-92-002, April 1992, U.S. EPA. EPA Methods 505, 507, 508, 525.1, 531.1 and 553 are in Methods for the Determination of Nonconventional Pesticides in Municipal and Industrial ,Wastewater,, Volume ...

Selenium | Se - PubChem
Selenium | Se - PubChem

Selenium, is a naturally occurring mineral element that is distributed widely in nature in most rocks and soils. In its pure form, it exists as metallic gray to black hexagonal crystals, but in nature it is usually combined with sulfide or with silver, copper, lead, and nickel minerals. Most processed ,selenium, is used in the electronics industry, but it is also used: as a nutritional supplement ...

RULE 7011 HEXAVALENT CHROMIUM - CHROME PLATING AND …
RULE 7011 HEXAVALENT CHROMIUM - CHROME PLATING AND …

and the chromic ,acid, solution, with a concentration typically ranging from 50 to 100 grams per liter (g/L), serves as the electrolyte. 3.11 ,Chromium, electroplating or chromic ,acid, anodizing tank: the receptacle or container in which hard or decorative ,chromium, electroplating or chromic ,acid, anodizing occurs.

Citric acid assisted treatment of chromium contaminated ...
Citric acid assisted treatment of chromium contaminated ...

Citric ,acid, assisted treatment of ,chromium, contaminated ,wastewater, by constructed wetland ... antioxidant enzymes, reactive oxygen species, ,electrolytic, leakage and heavy metals uptake and accumulation. The ... ,Chromium,, ,Wastewater,, Citric ,Acid,, Biochemical attributes .

ACS Sustainable Chemistry & Engineering
ACS Sustainable Chemistry & Engineering

Editorials ACS Sustainable Chemistry & Engineering Welcomes Expanded Editorial Boards with New Initiatives. One of the primary functions of the journal's Advisory Boards in 2021 will be to guide the development of editorial content, sometimes referred to as front matter.

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 ...

Chemistry of persulfates in water and wastewater treatment ...
Chemistry of persulfates in water and wastewater treatment ...

15/12/2017, · Peroxymonosulfate (PMS; monopersulfate) has its origin from the Caro’s ,acid, (H 2 SO 5) also known as persulfuric, peroxymonosulfuric, and peroxysulfuric ,acid, .It possesses reactive oxygen closest to the hydrogen atom that carries the active power (Fig. 2b).Since the oxygen is readily reactive, KHSO 5 is usually found in a more stable form of a white triple salt, 2KHSO 5 ·KHSO 4 ·K 2 SO 4 ...

Research Article The Effective Electrolytic Recovery of ...
Research Article The Effective Electrolytic Recovery of ...

The Effective ,Electrolytic, Recovery of Dilute Copper from ... lead, and ,chromium,. Electroplating copper industry discharged huge amount of ,wastewater, into ,wastewater, plant. ... only ,acid, washing water, which con-tains abundant cupric ions, was considered to be reclaimed here.

RULE 1469. HEXAVALENT CHROMIUM EMISSIONS FROM CHROMIUM …
RULE 1469. HEXAVALENT CHROMIUM EMISSIONS FROM CHROMIUM …

Is a hexavalent ,chromium, electroplating or chromic ,acid, anodizing tank. (60) TRIVALENT ,CHROMIUM, means the form of ,chromiu m, in a valence state of +3. (61) TRIVALENT ,CHROMIUM, PROCESS means the process used for electrodeposition of a thin layer of ,chromium, onto a base material using a trivalent ,chromium, solution instead of a chromic ,acid, solution.

Cyanide removal from electroplating wastewater
Cyanide removal from electroplating wastewater

If ferric and ,chromium, ions exist in the ,wastewater,, it is really hard to eliminate cyanide by oxidation process with chlorine, hypochlorite, even ozone. This is because the oxidation process should be carried out in basic solutions with pH>10.2, in which cyanide strongly tends to complex ferric and ,chromium, ions.

The electrolyte for the deposition of corrosion ...
The electrolyte for the deposition of corrosion ...

The purpose of the claim and the relief of ,wastewater, treatment. The invention consists in that the electrolyte for the deposition of a corrosion-resistant coating alloy ,chromium,-zinc containing chromic anhydride and sulfuric ,acid, zinc, hydrate, optionally contains azulene formula / BR> in the following ratio of components, g/l:

DTIC ADA420014: Determination of Wastewater Acids from ...
DTIC ADA420014: Determination of Wastewater Acids from ...

DTIC ADA420014: Determination of ,Wastewater, Acids from ,Chromium, Plating and Electropolishing Solutions Item Preview remove-circle Share or Embed This Item.

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