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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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GroundWater Pollution Problems in the Southeastern United ...
GroundWater Pollution Problems in the Southeastern United ...

The most ,common, natural water-quality problems in fresh-water aquifers are high hardness; high iron content; excessive fluoride concentrations; corrosive- ness; and the presence of radionuclides. 6. Surface impoundments, which are used for treating, handling, and storing liquid wastes and sludges, are leaking many millions of litres per year of potentially hazardous substances to ground water.

Acid mine drainage - Wikipedia
Acid mine drainage - Wikipedia

14/6/2004, · The most commonly mined ore of, copper,, chalcopyrite, is itself a copper-iron-sulfide and occurs with a range of other sulfides. Thus,, copper, mines are often major culprits of, acid, mine, drainage., At some mines,, acidic drainage, is detected within 2–5 years after mining begins, whereas at other mines, it is not detected for several decades.

Wastewater Treatment during PCB Fabrication Process | PSPCB
Wastewater Treatment during PCB Fabrication Process | PSPCB

This process produces acidic copper-containing waste liquid, copper-containing wastewater, and ammonia. (6) Fading: Dissolve the hardened dry film on the copper line with an aqueous solution containing sodium hydroxide or an organic solvent to expose the copper line and wash it with water. This process produces organic wastewater and waste.

Wastewater Treatment during PCB Fabrication Process | PSPCB
Wastewater Treatment during PCB Fabrication Process | PSPCB

This process produces acidic copper-containing waste liquid, copper-containing wastewater, and ammonia. (6) Fading: Dissolve the hardened dry film on the copper line with an aqueous solution containing, sodium hydroxide, or an organic solvent to expose the copper line and wash it with water. This process produces organic wastewater and waste.

(PDF) Treatment of Wastewater from New Copper Smelter RTB Bor
(PDF) Treatment of Wastewater from New Copper Smelter RTB Bor

Wastewater, from the primary copper smelter is very acidic, with a high content of dissolved heavy metals and arsenic. Treatment of wastewater includes the neutralization of the acid, precipitation...

Mining Wastewater | liquideffluents
Mining Wastewater | liquideffluents

17/5/2012, · The mining of metallic ores (e.g. iron, ,copper,, lead, zinc, molybdenum, and tungsten), precious metals such as gold, platinum and silver, and large scale coal mining all produces ,wastewater, (U.S.EPA, 2010). As discussed below, this ,waste water, is usually mine drainage pumped from mining areas, water used and discharged from the processing of the ...

Hydrothermal Treatment of Arsenic Sulfide Residues from ...
Hydrothermal Treatment of Arsenic Sulfide Residues from ...

In the smelting of ,copper, or lead-zinc ore, larger amounts of ,acidic wastewater, are discharged when gaseous emission ,containing, SO2, As, Cu, Pb, Zn and other impurities are washed with diluted acid [7]. Moreover, wasted electrolyte with a high concentration of arsenic is produced abundantly in ,copper, and lead-zinc electrolyte processes [8,9].

saline injected animals: Topics by Science.gov
saline injected animals: Topics by Science.gov

1/12/2018, · The saline ,wastewater, is disposed of by injection into wells completed in the Duchesne River Formation, Uinta Formation, and other underlying formations. There are concerns that the injected saline ,wastewater, could migrate into the upper part of the Duchesne River and Uinta Formations and surficial deposits that are used for drinking-water supply and degrade the quality of the drinking water.

TREATMENT OF ACIDIC WASTEWATER FROM THIEN KE TIN ...
TREATMENT OF ACIDIC WASTEWATER FROM THIEN KE TIN ...

from the ,wastewater,, such as iron from 143.1 mg/L to 0.3 mg/L, ,copper, from 16.32 mg/L to 0.04 mg/L and manganese from 10.9 mg/L to 0.05 mg/L. The continuous mode with a hydraulic load of 100 l/h and an according retention time of three days showed constitutive contaminant removal. The effluent pH of the system was around 7 within six-day period.

Selective Sulphide Precipitation of Copper Nickel and ...
Selective Sulphide Precipitation of Copper Nickel and ...

wastewater,, ,containing, 10 g/L Cu2+, 0.3 g/L Ni2+ and 3 g/L Zn 2+ ions, were treated at pH 2.3 and ,copper, was precipitated as CuS with almost 100% of efficiency.

Acid mine drainage - Wikipedia
Acid mine drainage - Wikipedia

The most commonly mined ore of copper, chalcopyrite, is itself a copper-iron-sulfide and occurs with a range of other sulfides. Thus, copper mines are often major culprits of acid mine drainage. At some mines, acidic drainage is detected within 2–5 years after mining begins, whereas at other mines, it is not detected for several decades.

Chemical precipitation of heavy metals from wastewater by ...
Chemical precipitation of heavy metals from wastewater by ...

Nevertheless, the traditional reagents have several disadvantages: (1) most of the heavy metal ions exist in ,acidic, solution and sulfide reagents in ,acidic, solution can form toxic hydrogen sulfide gas, which has detrimental effect on human health and environment, (2) the sulfide of heavy metal formed is difficult to filter due to its small particle size, (3) the insoluble hydroxide of amphoteric metals, such as ,copper, …

Use of Sorption of Copper Cations by Clinoptilolite for ...
Use of Sorption of Copper Cations by Clinoptilolite for ...

type 4 A with a pore size of 0.4 nm. Its chemical composition in a dehydrated state is expressed by the formula: Na2O Al2O3 2 SiO2. Calsite is a synthetic zeolite of the type 5 A with a pore size of 0.5 nm. Its chemical composition in the dehydrated state is …

Hydrothermal Treatment of Arsenic Sulfide Residues from ...
Hydrothermal Treatment of Arsenic Sulfide Residues from ...

In the smelting of ,copper, or lead-zinc ore, larger amounts ,of acidic wastewater, are discharged when gaseous emission ,containing, SO2, As, Cu, Pb, Zn and other impurities are washed with diluted acid [7]. Moreover, wasted electrolyte with a high concentration of arsenic is produced abundantly in ,copper, and lead-zinc electrolyte processes [8,9].

Metal recovery of solid metallurgical wastes ...
Metal recovery of solid metallurgical wastes ...

pickling ,wastewater, [10], gold plant waste streams [11], spent ,copper,-cyanide electroplating electrolytes [12], and stripping solutions in the manufacture of printed circuit boards [13]. ,Copper, electrodeposition onto porous, fluidized and spouted bed electrodes and the treatment of ,copper,-,containing, waste streams is studied by J. W. Evans

TREATMENT OF ACIDIC WASTEWATER FROM THIEN KE TIN ...
TREATMENT OF ACIDIC WASTEWATER FROM THIEN KE TIN ...

The chemical ,composition, of, AMD from Thien Ke tin factory is characterized by low pH and organic carbon, high concentration of sulfate, iron, manganese and ,copper,. The high concentration of sulfate (982.7 mg/L) is a good prerequisite for the activity of SRB in the system. Table 1. Chemical ,composition, of AMD from Thien Ke tin mine. No.

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