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oil field fracturing flow-back fluids treatment methods include

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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oil field fracturing flow-back fluids treatment methods include
Environmental Impact Statement and Environmental Impact ...
Environmental Impact Statement and Environmental Impact ...

Approximately 16 gal of microfilm bleach ,solution, (a mixture of sulfamic ,acid, and ,potassium dichromate, in an aqueous ,solution,) spilled onto a laboratory floor as a result of a pump failure.

Removal of heavy metal from industrial wastewater using ...
Removal of heavy metal from industrial wastewater using ...

Batch equilibrium experiments were carried out using CCB, CCAB as well as AOPSC as adsorbents. ,Potassium dichromate, (K 2 Cr 2 O 7) (Fluka, Switzerland) was used as the source of Cr (VI) in the synthetic ,wastewater,. The Cr stock ,solution, (500 mg/l) was prepared by dissolving 0.707 g of K 2 Cr 2 O 7 in 500 ml of deionized water.

Chromium(VI) Accumulation and Tolerance by Tradescantia ...
Chromium(VI) Accumulation and Tolerance by Tradescantia ...

as ,potassium dichromate, (K 2Cr 2O 7)fromitsstocksolution(100mgL −1). The pH of Cr ,solution, and control tap water ranged between 6.8 and 7.0. The nutrient ,solution, in each container was replaced with a fresh medium every 4 days during the experi-ments. Growth conditions of the plants were the same as noted earlier in‘Screening

Assessment of Cr(VI) Biosorption from Aqueous Solution by ...
Assessment of Cr(VI) Biosorption from Aqueous Solution by ...

The ,potassium dichromate, K 2 Cr 2 O 7 provided by Merck Company was used for preparing the Cr(VI) stock ,solution, and stored at room temperature. The double distilled water was utilized to dilute the ,solution, of chromium ion to prepare the condition of each experiment. Preparation of biosorbent

JOURNAL OF INTERNATIONAL ACADEMIC RESEARCH FOR ...
JOURNAL OF INTERNATIONAL ACADEMIC RESEARCH FOR ...

pH adjustment is achieved with the use of sulphuric ,acid, whereby the pH is reduced to 2-3. At this level, the reduction of Cr+6 to Cr+3 can be achieved very efficiently. The equalization technique where acidic waste from some other ,plant, is mixed with the liquid waste can also be …

Adsorption of Chromium(VI) from Aqueous Solutions by ...
Adsorption of Chromium(VI) from Aqueous Solutions by ...

Stock ,solution, of Cr(VI) (17.6 mg/mL) was prepared by dissolving accurately weighed ,potassium dichromate, (K 2 Cr 2 O 7, Loba Chemie Pvt. Ltd. Mumbai, India) in 100 mL deionized water. A ,solution, (0.025%) of 1,5-diphenylcarbazide (DPC, Sigma-Aldrich, USA) was prepared by dissolving 25 mg of DPC in 5 mL of acetone (Merck) and 10 mL of 5 M H 2 SO 4 .

Adsorption of Chromium(VI) from Aqueous Solutions by ...
Adsorption of Chromium(VI) from Aqueous Solutions by ...

Stock ,solution, of Cr(VI) (17.6 mg/mL) was prepared by dissolving accurately weighed ,potassium dichromate, (K 2 Cr 2 O 7, Loba Chemie Pvt. Ltd. Mumbai, India) in 100 mL deionized water. A ,solution, (0.025%) of 1,5-diphenylcarbazide (DPC, Sigma-Aldrich, USA) was prepared by dissolving 25 mg of DPC in 5 mL of acetone (Merck) and 10 mL of 5 M H 2 SO 4 .

Fertilizers and Mixed Crop Cultivation of Chromium ...
Fertilizers and Mixed Crop Cultivation of Chromium ...

Zea mays (maize) and Vigna radiata (green gram) are found to be the chromium (Cr) tolerant and sensitive plants, respectively. In the present paper, we investigate the reduction of the toxicity of Cr in the sensitive plants by the mixed crop cultivation in the field using various amendments. Further, the ,potassium dichromate, was used as the source of hexavalent Cr.

How we get exposed to the heavy metal CHROMIUM (Cr) | Toxno
How we get exposed to the heavy metal CHROMIUM (Cr) | Toxno

Only lead chromate (as crocoite) and ,potassium dichromate, (as lopezite) are known to occur in nature. Based on US data collected from 2106 monitoring stations during 1977–84, the arithmetic mean concentrations of total chromium in the ambient air (urban, suburban, and rural) were in the range of 0.005–0.525 μg/m3

Senior Chemistry - Extended Experimental Investigations
Senior Chemistry - Extended Experimental Investigations

In this analysis, you add an excess of standardized acidified ,potassium dichromate solution, to the wine which converts the ethanol to ethanoic (acetic) ,acid,. The amount of unreacted ,dichromate, is then determined by adding an excess of ,potassium, iodide ,solution, which is also oxidised by the ,potassium dichromate, to form iodine.

Removal of heavy metal from industrial wastewater using ...
Removal of heavy metal from industrial wastewater using ...

Batch equilibrium experiments were carried out using CCB, CCAB as well as AOPSC as adsorbents. ,Potassium dichromate, (K 2 Cr 2 O 7) (Fluka, Switzerland) was used as the source of Cr (VI) in the synthetic ,wastewater,. The Cr stock ,solution, (500 mg/l) was prepared by dissolving 0.707 g of K 2 Cr 2 O 7 in 500 ml of deionized water.

Environmental Impact Statement and Environmental Impact ...
Environmental Impact Statement and Environmental Impact ...

Approximately 16 gal of microfilm bleach ,solution, (a mixture of sulfamic ,acid, and ,potassium dichromate, in an aqueous ,solution,) spilled onto a laboratory floor as a result of a pump failure.

Absorption Activity of Cassava Peel (Manihot utilissima ...
Absorption Activity of Cassava Peel (Manihot utilissima ...

Electroplating, is a process of metal veneering with another metal using the electric energy. The heavy metals found in the content of ,electroplating, waste have high

Journal of Molecular Catalysis A: Chemical
Journal of Molecular Catalysis A: Chemical

electroplating,, textile dyeing, paint, leather tanneries, ... ,there, is an urgent need to remove phenol from the ,wastewater,. Hence, the reduction of Cr(VI) into Cr(III) received great ... elsewhere [38]. ,Potassium dichromate, (K2Cr2O7), and caffeic ,acid, (3,4-dihydroxycinnamic ,acid,, …

Journal of Molecular Catalysis A: Chemical
Journal of Molecular Catalysis A: Chemical

electroplating,, textile dyeing, paint, leather tanneries, ... ,there, is an urgent need to remove phenol from the ,wastewater,. Hence, the reduction of Cr(VI) into Cr(III) received great ... elsewhere [38]. ,Potassium dichromate, (K2Cr2O7), and caffeic ,acid, (3,4-dihydroxycinnamic ,acid,, …

Electronic Industry Waste Water - SlideShare
Electronic Industry Waste Water - SlideShare

Wastewater, treatment plants may be distinguished by the type of ,wastewater, to be treated, i.e. whether it is sewage, industrial ,wastewater,, agricultural ,wastewater, or leachate. Conventional ,wastewater, treatment consists of a combination of physical, chemical, and biological processes and operations to remove solids, organic matter and, sometimes, nutrients from ,wastewater,.

ANAEROBIC TREATMENT OF POLYETHYLENE GLYCOL(PEG ...
ANAEROBIC TREATMENT OF POLYETHYLENE GLYCOL(PEG ...

WASTEWATER, IN A FIXED-BED REACTOR Satoto E. Nayono ... as one component in copper ,electroplating solution, which acts as a brightener and stabilizer to enhancethe copper deposition rate ... Nordmann (1977) using ,potassium dichromate, (K2Cr2O7) in a mixture of sulphuric ,acid, and phosphoric ,acid, ...

Chemical oxygen demand - WikiMili The Best Wikipedia Reader
Chemical oxygen demand - WikiMili The Best Wikipedia Reader

Most commonly, a 0.25 N ,solution, of ,potassium dichromate, is used for COD determination, although for samples with COD below 50 mg/L, a lower concentration of ,potassium dichromate, is preferred. In the process of oxidizing the organic substances found in the water sample, ,potassium dichromate, is reduced (since in all redox reactions, one reagent is oxidized and the other is reduced), forming Cr 3+ .

Assessment of Cr(VI) Biosorption from Aqueous Solution by ...
Assessment of Cr(VI) Biosorption from Aqueous Solution by ...

The ,potassium dichromate, K 2 Cr 2 O 7 provided by Merck Company was used for preparing the Cr(VI) stock ,solution, and stored at room temperature. The double distilled water was utilized to dilute the ,solution, of chromium ion to prepare the condition of each experiment. Preparation of biosorbent

Electronic Industry Waste Water - SlideShare
Electronic Industry Waste Water - SlideShare

Wastewater, treatment plants may be distinguished by the type of ,wastewater, to be treated, i.e. whether it is sewage, industrial ,wastewater,, agricultural ,wastewater, or leachate. Conventional ,wastewater, treatment consists of a combination of physical, chemical, and biological processes and operations to remove solids, organic matter and, sometimes, nutrients from ,wastewater,.

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