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oil producing machinery companies

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 producing machinery companies
Chromium - DuPont
Chromium - DuPont

More ,chromium, can be removed by the resin per equivalent when the ,chromium, is in the dichromate form (pH 2 – pH 6). Filtration can also be used to remove chromate from ,wastewater,. Ferrous sulfate is used to reduce hexavalent chrome to trivalent chrome. This material is then precipitated, coagulated, and filtered out of the water.

Heavy Metals Removal Industrial Wastewater Solutions
Heavy Metals Removal Industrial Wastewater Solutions

Heavy Metals ,Wastewater, Treatment System (Chrome Removal) ,Chromium, is present in the wastewaters of a number of industries, including: stainless steel manufacturing, protective coatings on metal, magnetic tapes, chrome plating, tanneries, textile dyes production, pigments and paint production, production of cement, paper, rubber, etc. ,Chromium, is typically precipitated in two steps: reduction …

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.

Review of Chromium Residue and Chromium-containing Waste ...
Review of Chromium Residue and Chromium-containing Waste ...

Review of ,Chromium, Residue and ,Chromium,-,containing Waste Water, Treatment Qing Zhang 1,a, Guohua Chang1,b , Tianpeng Gao2,c, Haili Sun1, Yingquan Chen1, Bin Yue1, Xisheng Tai2 and Wanjiang Li1 1School of Chemistry and Environmental Engineering, Lanzhou City University,Lanzhou,730070 P.R.China 2School of Geography and Urban & Rural Planning, Lanzhou City University,Lanzhou,730070

Iron (Fe) and water - Lenntech
Iron (Fe) and water - Lenntech

Aluminum waste products ,containing, iron were discharged on surface water in the earlier days. Today, these are removed and applied as soil fillers. Iron compounds are applied in precipitation reactions, to remove compounds from water in water purification processes. The 59 ,Fe, isotope is applied in medical research and nuclear physics.

Selected Heavy Metals Removal From Electroplating ...
Selected Heavy Metals Removal From Electroplating ...

14/3/2019, · The discharge limit of ,wastewater containing, Cr (VI) into the environment (surface waters) is regulated at <0.05 mg/L and 0.1 mg/L to inland surface waters according to the WHO and EPA 48,49 ...

Chromium(III) substitution inhibits the Fe(II)-accelerated ...
Chromium(III) substitution inhibits the Fe(II)-accelerated ...

5/12/2018, · Introduction. ,Schwertmannite, is a poorly-ordered ,Fe,(III)-oxyhydroxysulfate which precipitates from acidic, ,Fe,- and SO 4 2— rich waters [1–3].As such, it occurs commonly in systems that are affected by ,acid,-sulfate soils (ASS) and ,acid,-mine drainage (AMD) [4–9].The formation and fate of ,schwertmannite, strongly influences ,Fe, and S cycling, the generation and consumption of acidity, as …

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

Heavy Metals Removal Industrial Wastewater Solutions
Heavy Metals Removal Industrial Wastewater Solutions

Heavy Metals Removal Heavy Metals ,Wastewater, Treatment System (Chrome Removal) ,Chromium, is present in the wastewaters of a number of industries, including: stainless steel manufacturing, protective coatings on metal, magnetic tapes, chrome plating, tanneries, textile dyes production, pigments and paint production, production of cement, paper, rubber, etc. ,Chromium, is typically precipitated in ...

Chromium Speciation in Municipal Wastewaters and Seawater
Chromium Speciation in Municipal Wastewaters and Seawater

with 100 fig of ,Fe,(III) as ,Fe,(OH)3; the mix ture was then shaken for 6 hours. The same procedure was followed for ,wastewater, sam ples, using a 50-ml sample and mixing with 2 mg of ,Fe,(III). After the precipitates were collected by filtration, the ,chromium, was dis TABLE L Methods of analysis for dissolved ,chromium,. Form Matrix Sample Treatment ...

Chromium(III) substitution inhibits the Fe(II)-accelerated ...
Chromium(III) substitution inhibits the Fe(II)-accelerated ...

5/12/2018, · Introduction. ,Schwertmannite, is a poorly-ordered ,Fe,(III)-oxyhydroxysulfate which precipitates from acidic, ,Fe,- and SO 4 2— rich waters [1–3].As such, it occurs commonly in systems that are affected by ,acid,-sulfate soils (ASS) and ,acid,-mine drainage (AMD) [4–9].The formation and fate of ,schwertmannite, strongly influences ,Fe, and S cycling, the generation and consumption of acidity, as …

Metal removal from chromium containing synthetic effluents ...
Metal removal from chromium containing synthetic effluents ...

effluents with the following composition: Cr(VI)-,Fe,(III), Cr(VI)-,Fe,(III)-Ni(II), Cr(VI)-,Fe,(III)-Ni(II)-Zn(II), and Cr(VI)-,Fe,(III)-Ni(II)-Zn(II)-Cu(II). Biosorbent was characterized using scanning electron microscopy and Fourier-transform infrared spectroscopy. The effect of pH, ,chromium, concentration,

Removal efficiency of hexavalent chromium from wastewater ...
Removal efficiency of hexavalent chromium from wastewater ...

The ,wastewater, from different electroplating plants is collected separately as copper-,containing,, ,chromium,-,containing,, nickel-,containing,, cyanide-,containing,, pickling, and comprehensive ,wastewater,. The five types of ,wastewater, are pumped into the sewage treatment plant to be treated using different processes according to the ,wastewater, properties.

Simultaneous capture of methyl orange and chromium(vi ...
Simultaneous capture of methyl orange and chromium(vi ...

complex ,wastewater,. Until now, no studies on simultaneously removing MO and Cr(VI) from complex ,wastewater, using MWCNTs@,Fe, 3O 4/PEIasadsorbentshavebeenreported.Hence, the purposes of current work was: (i) to design and synthesize an MWCNTs@,Fe, 3O 4/PEI composite to improve the drawbacks of pure MWCNTs as adsorptive materials; (ii) to evaluate its

Simultaneous capture of methyl orange and chromium(vi ...
Simultaneous capture of methyl orange and chromium(vi ...

complex ,wastewater,. Until now, no studies on simultaneously removing MO and Cr(VI) from complex ,wastewater, using MWCNTs@,Fe, 3O 4/PEIasadsorbentshavebeenreported.Hence, the purposes of current work was: (i) to design and synthesize an MWCNTs@,Fe, 3O 4/PEI composite to improve the drawbacks of pure MWCNTs as adsorptive materials; (ii) to evaluate its

ADSORPTION OF CHROMIUM FROM STEEL PLATING WASTEWATER …
ADSORPTION OF CHROMIUM FROM STEEL PLATING WASTEWATER …

from steel plating industry wastewater, containing 700 mg/L of chromium (as chromic acid), Fe total = 50 mg/L and SO4 –2 = 400 mg/L, at pH = 3. Similarly, figure 1 indicates that stable chromium species in the wastewater solution is Cr (VI) as HCrO 4 – ions at the solution pH. Batch tests were performed to …

Review of Chromium Residue and Chromium-containing Waste ...
Review of Chromium Residue and Chromium-containing Waste ...

Review of ,Chromium, Residue and ,Chromium,-,containing Waste Water, Treatment Qing Zhang 1,a, Guohua Chang1,b , Tianpeng Gao2,c, Haili Sun1, Yingquan Chen1, Bin Yue1, Xisheng Tai2 and Wanjiang Li1 1School of Chemistry and Environmental Engineering, Lanzhou City University,Lanzhou,730070 P.R.China 2School of Geography and Urban & Rural Planning, Lanzhou City University,Lanzhou,730070

Removal efficiency of hexavalent chromium from wastewater ...
Removal efficiency of hexavalent chromium from wastewater ...

The ,wastewater, from different electroplating plants is collected separately as copper-,containing,, ,chromium,-,containing,, nickel-,containing,, cyanide-,containing,, pickling, and comprehensive ,wastewater,. The five types of ,wastewater, are pumped into the sewage treatment plant to be treated using different processes according to the ,wastewater, properties.

Simultaneous capture of methyl orange and chromium(vi ...
Simultaneous capture of methyl orange and chromium(vi ...

complex ,wastewater,. Until now, no studies on simultaneously removing MO and Cr(VI) from complex ,wastewater, using MWCNTs@,Fe, 3O 4/PEIasadsorbentshavebeenreported.Hence, the purposes of current work was: (i) to design and synthesize an MWCNTs@,Fe, 3O 4/PEI composite to improve the drawbacks of pure MWCNTs as adsorptive materials; (ii) to evaluate its

Heavy Metals Removal Industrial Wastewater Solutions
Heavy Metals Removal Industrial Wastewater Solutions

Heavy Metals ,Wastewater, Treatment System (Chrome Removal) ,Chromium, is present in the wastewaters of a number of industries, including: stainless steel manufacturing, protective coatings on metal, magnetic tapes, chrome plating, tanneries, textile dyes production, pigments and paint production, production of cement, paper, rubber, etc. ,Chromium, is typically precipitated in two steps: reduction …

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