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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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acid fracturing waste water up-to-standard emission treatment centers near me
Hexavalent Chromium Removal from Water Using Heat-Acid ...
Hexavalent Chromium Removal from Water Using Heat-Acid ...

Red Mud, Heat-,Acid Treatment,, Adsorption Isotherm, ,Hexavalent Chromium, Removal 1. Introduction ,Hexavalent chromium, is one of the heavy mental contaminants found in the water which is used in a variety of applications including electroplating, steel production, leather tanning, mining and textile dyeing [1]. ,Chromium

Effluent Treatment Plant Design Operation And Analysis Of ...
Effluent Treatment Plant Design Operation And Analysis Of ...

Ion, exchange using natural or synthetic resins removes calcium, magnesiumand carbonate ions from water, replacing them with hydrogen and hydroxyl ions.Regeneration of ,ion, exchange columns with strong acids and alkalis produces a wastewaterrich in hardness ions which are readily precipitated out, especially when in admixture withother ,wastewater,.1.3 Effluent ,Treatment, PlantIndustrial ,wastewater, ...

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 ...

Adsorption of Hexavalent Chromium from Aqueous Solutions ...
Adsorption of Hexavalent Chromium from Aqueous Solutions ...

Chromium, is one of heavy metals that has been a major interest in water and ,wastewater treatment,. ,Chromium, be able released to the environment through a ... phosphate ,acid,, sulfuric ,acid,, lactic ,acid,, sodium ... After filtration, the concentration of ,hexavalent chromium ion, in the supernatant was analysed by using an UV ...

Efficient removal of hexavalent chromium from water by an ...
Efficient removal of hexavalent chromium from water by an ...

polypyrrole (PPy) to remove ,hexavalent chromium ion, Cr(VI) from ,water by an adsorption–reduction mechanism,. In the sandwiched nanocomposites, GO provided enough surface area, functional groups, and hydrophilic surface for efficient absorption. Fe 3O 4 nanoparticles with excellent magnetic properties make it easy to separate and recover from water.

Environmental Science & Technology | Vol 55 No 8
Environmental Science & Technology | Vol 55 No 8

Insights into the Occurrence, Fate, and Impacts of Halogenated Flame Retardants in Municipal ,Wastewater Treatment, Plants. Guofang Xu, Xuejie Zhao, Siyan Zhao, Chen Chen, Matthew J. Rogers, Rajaganesan Ramaswamy, and ; Jianzhong He*

Treatment of effluent containing PFASs | Industrial ...
Treatment of effluent containing PFASs | Industrial ...

As part of its process, surfactants with PFASs formed a floating layer in the chrome vats and were used to suppress gaseous emissions of hexavalent chromium, volatile organic compounds and other contaminants. These were then taken to the rinse baths and drainage and storm sewers before leaking into underground aquifers.

Cyano-containing wastewater treatment machine - Fuel ...
Cyano-containing wastewater treatment machine - Fuel ...

I – restoration hexavalent chromium Cr +6 to trivalent chromium Cr +3 in chromium-containing wastewater; II – oxidization of cyanides to cyanates in cyano-containing wastewater; III – simultaneous wastewater treatment after mixing neutralized chromium-containing wastewater and cyano-containing wastewater with acid-base wastewater.

Effectiveness of Thermal and Acid Modification on ...
Effectiveness of Thermal and Acid Modification on ...

Rapid industrialization has led to an increased discharged ,wastewater containing, heavy metals, which have detrimental effects on the environmental and human health. ,Chromium, ions, which exist in both trivalent and ,hexavalent, forms (Cr(III) and Cr(VI), respectively), are often present in the effluents

Chromium(III) acetate | C6H9CrO6 - PubChem
Chromium(III) acetate | C6H9CrO6 - PubChem

However, the classification of ,hexavalent chromium, as a known human carcinogen raises a concern for the carcinogenic potential of trivalent ,chromium,. HUMAN CARCINOGENICITY DATA: Occupational exposure to trivalent ,chromium, and other ,chromium, compounds by inhalation has been studied in the chromate manufacturing and ferrochromium industries; however, exposures all include mixed …

Heavy metal pollution in the environment and their ...
Heavy metal pollution in the environment and their ...

1/9/2020, · The difference in structures shows why the trivalent form of ,chromium, is less toxic than the ,hexavalent, form. Once the ,hexavalent, form of ,chromium, enters the cell, through redox reactions, Cr 6+ is reduced to Cr 3+ together with the intermediates Cr 4+ and Cr 5+. The reaction contributes to Cr 4+ which has a higher toxic potency than Cr 3+.

Case study: How to purify Hexavalent Chrome Wastewater
Case study: How to purify Hexavalent Chrome Wastewater

Wastewater, which contains ,chromium, and other heavy metals is classified as high toxic ,wastewater,. For this type of ,wastewater, is required qualitative and effective ,treatment,. There are different ,chromium, removal methods such as chemical precipitation, adsorption and biosorption, reverse osmosis, ,ion, exchange, electrodialysis, photo-catalysis.

CHROMIUM REMOVAL FROM TANNERY WASTEWATER …
CHROMIUM REMOVAL FROM TANNERY WASTEWATER …

chromium, removal efficiency was examined investigating various parameters: applied voltage, time, and current density. In thebatch experiment, 500 mL ,chromium,-,containing wastewater, was used for electrocoagulation. ,Chromium, content in the raw ,wastewater, was 340.1 mg/L and after ,treatment, at optimized conditions, ,chromium, content was 6.9 mg/L.

ACS Applied Materials & Interfaces | Vol 13 No 14
ACS Applied Materials & Interfaces | Vol 13 No 14

14/4/2021, · Advanced Tri-Layer Carbon Matrices with π–π Stacking Interaction for Binder-Free Lithium-,Ion, Storage. Peng Huang, Tuzhi Xiong, Shuhui Zhou, Hao Yang*, Yongchao Huang, M.-Sadeeq Jie Tang Balogun*, and ; Yuanli Ding*

Chromic acid | H2CrO4 - PubChem
Chromic acid | H2CrO4 - PubChem

/,Chromic acid,:/ This important ,acid, is known also as ,chromium, trioxide. The technical grade is obtainable from primary producers in an anhydrous form as small dark red flakes ,containing, 99% CrO3. Like all chromates and dichromates, its ,chromium, is in the ,hexavalent, state.

Typical Wastes Generated by Industry Sectors | Hazardous ...
Typical Wastes Generated by Industry Sectors | Hazardous ...

26/11/2019, · ,Chromium,, ,acid, and alkaline salts, and acids: D002 (,acid, and alkaline salts and acids) and D007 (,chromium,) Reuse spent ,chromium, as ingredient in pickle solution Reprocess spent ,chromium, for reuse in tanning process; Neutralize ,acid, wastewaters with liming/unhairing/deliming liquors which have first been aerated to treat sulfide

Hexavalent chromium - Wikipedia
Hexavalent chromium - Wikipedia

Hexavalent chromium, was found in drinking water in the southern California town of Hinkley and was brought to popular attention by the involvement of Erin Brockovich and Attorney Edward Masry.The source of contamination was from the evaporating ponds of a PG&E (Pacific Gas and Electric) natural gas pipeline Compressor Station located approximately 2 miles southeast of Hinkley.

Removal of heavy metal ions from wastewaters: A review ...
Removal of heavy metal ions from wastewaters: A review ...

1/3/2011, · Hydroxide precipitation process using Ca(OH) 2 and NaOH in removing Cu(II) and Cr(VI) ions from ,wastewater, was evaluated by Mirbagheri and Hosseini (2005).The Cr(VI) was converted to Cr(III) using ferrous sulfate. Maximum precipitation of Cr(III) occurred at pH 8.7 with the addition of Ca(OH) 2 and the concentration of chromate was reduced from 30 mg/L to 0.01 mg/L.

Removal of hexavalent chromium-contaminated water and ...
Removal of hexavalent chromium-contaminated water and ...

Owlad, M. and Aroua, M.K. and Daud, W.M.A.W. and Baroutian, S. (2009) ,Removal of hexavalent chromium-contaminated water and wastewater,: A review. Water Air and Soil Pollution, 200 (1-4). pp. 59-77. ISSN 0049-6979 Full text not available from this repository.Request a copy

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