Welcome to the company ! we have many years of professional experience !
rsdgj@pyzyrsd.com +86 513525609655

deep well drilling waste liquid harmless disposal technology inc.

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.

Certificate of Honor

Get in touch with us

We will confidentially process your data and will not pass it on to a third party.

deep well drilling waste liquid harmless disposal technology inc.
Reduction Monitoring in the Chromium Wastewater Treatment ...
Reduction Monitoring in the Chromium Wastewater Treatment ...

The hexavalent chromium in this wastewater must be reduced before the water can be discharged. This requires a two-step process: hexavalent chromium (CR6) is reduced to trivalent chromium (CR3); and CR3 is precipitated as chromium hydroxide. | Yokogawa Schweiz

Reduction Monitoring in the Chromium Wastewater Treatment ...
Reduction Monitoring in the Chromium Wastewater Treatment ...

The hexavalent chromium in this wastewater must be reduced before the water can be discharged. This requires a two-step process: hexavalent chromium (CR6) is reduced to trivalent chromium (CR3); and CR3 is precipitated as chromium hydroxide. | Yokogawa Schweiz

Removal of chromium from industrial effluents using ...
Removal of chromium from industrial effluents using ...

11/7/2017, · The presence ,of chromium, in ,industrial, effluents has become a huge problem worldwide as hexavalent ,chromium, is highly toxic to animals due to its ability to generate reactive oxygen species in cells. The trivalent state ,of chromium,, on the other hand, is significantly less toxic and also serves as an essential element in trace amounts.

Separation of Chromium (III) and Chromium (IV) by Ion ...
Separation of Chromium (III) and Chromium (IV) by Ion ...

acid into a 50 mL beaker and transfer to the volumetric flask. Bring to volume with DI H 2 O. 1000 mg/L Chromium Standards chromium salt, listed below, in 100 mL of a 50 mM nitric acid solution. Standard Salt Weight (g) Cr(III) Cr(NO 3) 3 • 9H 2 O 0.769 Cr(VI) Na 2 CrO 4 0.312 Standard Preparation Standards are prepared for chromatography in the

Chemical precipitation method for chromium removal and its ...
Chemical precipitation method for chromium removal and its ...

recovery ,of chromium, from tanning ,wastewater,. The basic ,chromium, sulfate ... ,acid, reagents and standard solutions. Volumetric flasks (50 mL, 100 mL and 1000 mL) were used for the dilution of the sample solution and ,preparation, of standards. Instrumentation Determination ,of chromium, was carried out using Flame Atomic Absorption Spectrometer ...

Removal and Recovery of Chromium(VI) from Industrial Waste ...
Removal and Recovery of Chromium(VI) from Industrial Waste ...

Removal and Recovery ,of Chromium,(VI) from ,Industrial Waste Water,. ... Sk. Musharaf Ali, Diglycolamic ,acid,-functionalized multiwalled carbon nanotubes as a highly efficient sorbent for f ... X. L. Zhang, ,Preparation, of amphiphilic composite and removal of oil and hexavalent ,chromium, from ,wastewater,, Environmental Chemistry Letters, 10.1007 ...

Chemical precipitation method for chromium removal and its ...
Chemical precipitation method for chromium removal and its ...

recovery ,of chromium, from tanning ,wastewater,. The basic ,chromium, sulfate ... ,acid, reagents and standard solutions. Volumetric flasks (50 mL, 100 mL and 1000 mL) were used for the dilution of the sample solution and ,preparation, of standards. Instrumentation Determination ,of chromium, was carried out using Flame Atomic Absorption Spectrometer ...

Bioabsorbent of Chromium Cadmium and Lead from Industrial ...
Bioabsorbent of Chromium Cadmium and Lead from Industrial ...

The best ,acid, pH level was detected in 6, 89.9% ,chromium, and banana peel . The study showed the highest efficiency of adsorption of bananas for heavy elements as these are considered inexpensive household waste on the biological removal of environmental pollutants. Keywords: Bioabsorbent, ,wastewater,, waste plants, heavy metals . 1 I. NTRODUCTION

Adsorption of Chromium (?) from Wastewater Using Natural ...
Adsorption of Chromium (?) from Wastewater Using Natural ...

used to treat the practical ,industrial wastewater, with a Cr (VI) concentration of 28.24 ... 3.2.2 ,Preparation, of the ,acid,-modified Akadama clay..... 56 3.2.3 Adsorption ... 1.2 ,Industrial, uses ,of chromium Chromium, is widely used in industries such as electroplating, ...

Reduction Monitoring in the Chromium Wastewater Treatment ...
Reduction Monitoring in the Chromium Wastewater Treatment ...

Wastewater from electroplating facilities and certain types of chemical plants contains toxic forms of hexavalent chromium such as chromate and dichromate. The hexavalent chromium in this wastewater must be reduced before the water can be discharged. This requires a two-step process: hexavalent chromium (CR 6) is reduced to trivalent chromium (CR 3 ...

METHOD 7196A CHROMIUM HEXAVALENT (COLORIMETRIC)
METHOD 7196A CHROMIUM HEXAVALENT (COLORIMETRIC)

7.2 ,Preparation, of calibration curve: 7.2.1 To compensate for possible slight losses ,of chromium, during digestion or other operations of the analysis, treat the ,chromium, standards by the same procedure as the sample. Accordingly, pipet a ,chromium, standard solution in measured volumes into 250-mL beakers or

METHOD 7196A CHROMIUM HEXAVALENT (COLORIMETRIC)
METHOD 7196A CHROMIUM HEXAVALENT (COLORIMETRIC)

7.2 ,Preparation, of calibration curve: 7.2.1 To compensate for possible slight losses ,of chromium, during digestion or other operations of the analysis, treat the ,chromium, standards by the same procedure as the sample. Accordingly, pipet a ,chromium, standard solution in measured volumes into 250-mL beakers or

REMOVAL OF HEAVY METALS FROM INDUSTRIAL WASTEWATER …
REMOVAL OF HEAVY METALS FROM INDUSTRIAL WASTEWATER …

from palm shell to remove Chromium from industrial wastewater. Pyrolysis was applied for the preparation of activated carbon from palm shell using furnace at 600ºC. The treatment of activated carbon was carried out by oxidizing it with sulphuric acid and coating with …

Removal and Recovery of Chromium(VI) from Industrial Waste ...
Removal and Recovery of Chromium(VI) from Industrial Waste ...

Removal and Recovery ,of Chromium,(VI) from ,Industrial Waste Water,. ... Sk. Musharaf Ali, Diglycolamic ,acid,-functionalized multiwalled carbon nanotubes as a highly efficient sorbent for f ... X. L. Zhang, ,Preparation, of amphiphilic composite and removal of oil and hexavalent ,chromium, from ,wastewater,, Environmental Chemistry Letters, 10.1007 ...

Possibilities of chromium (III) separation from acid ...
Possibilities of chromium (III) separation from acid ...

This paper describes the problem of recovery and reusing ,chromium, from aqueous solutions. The authors studied a novel ,double-carrier supported liquid membrane, system (DCSLM) with di(2-ethylhexyl) phosphoric ,acid, (D2EHPA) and bis(2,4,4-trimethyl) phosphinic ,acid, (Cyanex272) as a carrier of Cr(III) ions as a method to separate ,chromium, (III) ,from acid, solutions.

Adsorption of Chromium (?) from Wastewater Using Natural ...
Adsorption of Chromium (?) from Wastewater Using Natural ...

used to treat the practical ,industrial wastewater, with a Cr (VI) concentration of 28.24 ... 3.2.2 ,Preparation, of the ,acid,-modified Akadama clay..... 56 3.2.3 Adsorption ... 1.2 ,Industrial, uses ,of chromium Chromium, is widely used in industries such as electroplating, ...

Hexavalent chromium removal in a tannery industry ...
Hexavalent chromium removal in a tannery industry ...

tannery ,industrial wastewater,, ... finishing, and chromate ,preparation,. ,Chromium, is one of the heavy metals used by modern industries like plastic, pigment, ... At the end of 2 hours reaction, the trace of HCl ,acid, within the treated rice husk was removed by washing with tap water.

Possibilities of chromium (III) separation from acid ...
Possibilities of chromium (III) separation from acid ...

This paper describes the problem of recovery and reusing ,chromium, from aqueous solutions. The authors studied a novel ,double-carrier supported liquid membrane, system (DCSLM) with di(2-ethylhexyl) phosphoric ,acid, (D2EHPA) and bis(2,4,4-trimethyl) phosphinic ,acid, (Cyanex272) as a carrier of Cr(III) ions as a method to separate ,chromium, (III) ,from acid, solutions.

Reduction Monitoring in the Chromium Wastewater Treatment ...
Reduction Monitoring in the Chromium Wastewater Treatment ...

Wastewater from electroplating facilities and certain types of chemical plants contains toxic forms of hexavalent chromium such as chromate and dichromate. The hexavalent chromium in this wastewater must be reduced before the water can be discharged. This requires a two-step process: hexavalent chromium (CR 6) is reduced to trivalent chromium (CR 3 ...

Chat Online Inquiry Email

Business cooperation

+86 513525609655

Company address

Road West, North Branch, Jingkai Road, Puyang City