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Flowback rate 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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Flowback rate of fracturing flowback fluid
Removal of Chelated Metals - Wastewater Treatment Made ...
Removal of Chelated Metals - Wastewater Treatment Made ...

9/5/2006, · The main metallic components in the waste were nickel and ,chromium,, both present at a concentration of 30 to 70 ppm. The chelating agent was gluconic ,acid,. The conventional treatment involved ,chromium, reduction at pH of 2 to 3. Then the pH was raised to about 9 with caustic followed by DTC and a flocculent. The batch

Removal of heavy metals from wastewater using agricultural ...
Removal of heavy metals from wastewater using agricultural ...

Chromium is a toxic heavy metal which exists in several oxidation states, but chromium (VI) and chromium (III) are the largest threats to the environment (Yu et al. 2000). Numerous investigations have been conducted into the utilization of waste agricultural materials to remove chromium metal and ions from wastewater ( Carolin et al. 2017 ; Malik et al. 2017 ).

Determination of Hexavalent Chromium (Cr(VI ...
Determination of Hexavalent Chromium (Cr(VI ...

The concentration of hexavalent ,chromium, (Cr(VI)), a toxic ,environmental, pollutant and carcinogen, was determined in samples ,collected from Nacogdoches Wastewater Treatment, Plant (NWWTP) using ion chromatography and UV-visible spectrophotometry (IC, UV-Vis). On reaction with 1,5-diphenylcarbazide (DPC) Cr +6 ,forms, a 1,5-diphenylcarbazide-Cr(VI) complex, which is then analyzed at 530 nm and 540 ...

Global Journal of Environmental Science and Management
Global Journal of Environmental Science and Management

G lobal Journal of Environmental Science and Management (GJESM) is an open access quarterly Publication.Th e title welcomes original, review, novel and high-impact contributions from the related Environmental science and management issues. The GJESM Journal has been indexed in the well-known world databases mainly; Web of Science, Scopus (CiteScore = 2.9), Scimago Journal Rank (Q2), EBSCO ...

Metal-organic framework membranes for wastewater treatment ...
Metal-organic framework membranes for wastewater treatment ...

1/2/2020, · The ,acid,/base post-synthesis treatment is an effective tactic for introducing defects into the pre-formed MOF. For instance, an anion was added to the ,acid,-treated MIL-100 (Fe) pores when MIL-100(Fe) was treated with TFA or HClO 4.

ISSN 0973 – 6921 ; EISSN 2319 – 5983 Journal of ...
ISSN 0973 – 6921 ; EISSN 2319 – 5983 Journal of ...

existing, heavy metals. The concentrations ,of chromium, are generally low when it occurs naturally, but its concentrations tend to be rather high in the contaminated areas around industries where ,chromium, and its compounds are used. Industrial effluents containing ,chromium, can directly contaminate the surrounding water res- ources.

Global Journal of Environmental Science and Management
Global Journal of Environmental Science and Management

G lobal Journal of Environmental Science and Management (GJESM) is an open access quarterly Publication.Th e title welcomes original, review, novel and high-impact contributions from the related Environmental science and management issues. The GJESM Journal has been indexed in the well-known world databases mainly; Web of Science, Scopus (CiteScore = 2.9), Scimago Journal Rank (Q2), EBSCO ...

Article Adsorption of hexavalent chromium by sodium ...
Article Adsorption of hexavalent chromium by sodium ...

range: trivalent ,chromium, (Cr (III)) and hexavalent ,chromium, (Cr (VI)). Cr (III) is non-toxic and can be effectively removed by precipitation (such as ,chromium, hydroxide) or adsorption[4-7]. Cr (VI) are more dangerous because they have toxicity, higher solu-bility and mobility[4]. It appears in ,forms, of chromate (CrO 4 2-, HCrO 4

Global Journal of Environmental Science and Management
Global Journal of Environmental Science and Management

G lobal Journal of Environmental Science and Management (GJESM) is an open access quarterly Publication.Th e title welcomes original, review, novel and high-impact contributions from the related Environmental science and management issues. The GJESM Journal has been indexed in the well-known world databases mainly; Web of Science, Scopus (CiteScore = 2.9), Scimago Journal Rank (Q2), EBSCO ...

Removal of Hexavalent Chromium Ions from Aqueous Solutions ...
Removal of Hexavalent Chromium Ions from Aqueous Solutions ...

The maximum levels permitted in wastewater are 5 mg/ for trivalent and 0.05 mg/ for hexavalent chromium. When low levels are present in the environment, trivalent chromium apparently plays an essential role in plant and animal metabolisms, while hexavalent chromium is directly toxic to bacteria, plants and animals (Richard and Bourg 1991).

Chromium (VI) tolerance and bioaccumulation by Candida ...
Chromium (VI) tolerance and bioaccumulation by Candida ...

Chromium exists in several forms but trivalent Cr (III) and hexavalent Cr (VI) are the most stable forms . Cr (VI) compounds are 100 times more toxic than Cr (III) due to having higher solubility, greater permeability through biological membrane systems and their successive interaction with intracellular macromolecules including nucleic acids and proteins [ 10 , 11 ].

Adsorption of chromium by brewers spent grain -g- poly ...
Adsorption of chromium by brewers spent grain -g- poly ...

2007). Effluents (,wastewater,) and rinses from metal plating, passivation and ferrochrome processing in the electroplating industry constitute the major sources ,of chromium, in the environment (Gupta et al., 1999; Amuda et al., 2007). Respiratory problems (irritation and ulceration of the nasal septum and asthma), skin damage

Barium chromate | BaCrO4 - PubChem
Barium chromate | BaCrO4 - PubChem

Elimination ,of chromium, from mice within 48 hr after intratracheal admin of ,barium chromate, was only 12% of the dose. Among hexavalent ,chromium, cmpd, ,barium chromate, showed a low absorption rate near that of trivalent ,chromium, cmpd. The biological half-time was 18 days. The amt ,of chromium, distributed in the body was moderate.

US6221002B1 - Method to reduce hexavalent chromium in ...
US6221002B1 - Method to reduce hexavalent chromium in ...

The concentration of potentially toxic hexavalent chromium, {Cr(VI)}, in chromium-bearing soils/materials existing in the form of soils, sludges, sediments, fill, industrial wastes, or other...

Barium chromate | BaCrO4 - PubChem
Barium chromate | BaCrO4 - PubChem

Elimination ,of chromium, from mice within 48 hr after intratracheal admin of ,barium chromate, was only 12% of the dose. Among hexavalent ,chromium, cmpd, ,barium chromate, showed a low absorption rate near that of trivalent ,chromium, cmpd. The biological half-time was 18 days. The amt ,of chromium, distributed in the body was moderate.

How Do Wastewater Treatment Plants Work? | SSI
How Do Wastewater Treatment Plants Work? | SSI

The effluent mixes with the ,existing, surface water or groundwater. In that form, ... ,Wastewater, comes in a few different ,forms,. Different types of ,wastewater, require varied treatments, ... ,chromium,, phenols, and sulfides. With wool processing, ...

Adsorption of Hexavalent Chromium from Aqueous Solution by ...
Adsorption of Hexavalent Chromium from Aqueous Solution by ...

Chromium is a common pollutant, introduced into natural waters through the discharge of a wide range of industrial wastewaters. Various chemical processes employ the use of chromium for catalytic reactions, one of them being selective oxidation of hydrocarbons. Chromium is present in the environment in three

Recent advances in hexavalent chromium removal from ...
Recent advances in hexavalent chromium removal from ...

Chromium, exists mainly in two ,forms, in environmental matrices, namely, the hexavalent (Cr ( VI )) and trivalent (Cr ( III )) ,chromium,. While Cr ( III) is a micronutrient, Cr ( VI) is a known carcinogen, and that warrants removal from environmental samples. Amongst the removal techniques reported in the literature, adsorption methods are viewed as ...

Lime Use in Wastewater Treatment: Design and Cost Data
Lime Use in Wastewater Treatment: Design and Cost Data

In fact, Maruyama, et al. found, in pilot testing, that ferric sulfate removes barium more efficiently than lime, since barium ,forms, an insoluble precipitate as a sulfate.15 ,Chromium, in the hexavalent form exists as an oxide (chromate or dischromate anion) , which ,forms, a soluble salt with most cations found in ,wastewater,.14 if reduced to the trivalent form, the metal may precipitate as an ...

New trends in removing heavy metals from industrial wastewater
New trends in removing heavy metals from industrial wastewater

1/10/2011, · 2.2. Industrial ,wastewater, sources. Industrial ,wastewater, streams containing heavy metals are produced from different industries. Electroplating and metal surface treatment processes generate significant quantities of wastewaters containing heavy metals (such as cadmium, zinc, lead, ,chromium,, nickel, copper, vanadium, platinum, silver, and titanium) from a variety of applications.

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