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Removal of COD from acid wastewater

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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Removal of COD from acid wastewater
Per- and polyfluoroalkyl substances and fluorine mass ...
Per- and polyfluoroalkyl substances and fluorine mass ...

Due to the strong electronegativity and small atomic size of ,fluorine,, the perfluoroalkyl moiety (–C n F 2 n +1) imparts unique properties to molecules including high surface activity, chemical and thermal stability and water- and oil-repellency. 1 These properties make PFASs useful as low-molecular weight surfactants or polymeric materials in an array of industrial applications and consumer products. 2 However; following the detection of perfluorooctane sulfonic ,acid, …

Fundamentals of Reinforced Concrete Design | Construction ...
Fundamentals of Reinforced Concrete Design | Construction ...

Fundamentals of Reinforced Concrete Design, (2) - Free ebook download as PDF File (.pdf), Text File (.txt) or read book online for free.

Fluorine - Wikipedia
Fluorine - Wikipedia

Elemental fluorine and virtually all fluorine compounds are produced from hydrogen fluoride or its aqueous solutions, hydrofluoric acid. Hydrogen fluoride is produced in kilns by the endothermic reaction of fluorite (CaF 2) with sulfuric acid: CaF 2 + H 2 SO 4 → 2 HF(g) + CaSO 4. The gaseous HF can then be absorbed in water or liquefied.

Removal of Fluorine from Wet-Process Phosphoric Acid Using ...
Removal of Fluorine from Wet-Process Phosphoric Acid Using ...

The solution of fluoride (0.1 mg/mL) was prepared using NaF (GB/T1264) that had been dried to a constant weight at 120 °C. Then, 1, 2, 3, 5, and 10 mL of the ,fluorine ion, solution were transferred to five separate 50 mL volumetric flasks. Next, the concentration of fluoride in each flask was measured with the ,ion,-specific electrode method.

Dephosphorisation of Acidic Wastewater
Dephosphorisation of Acidic Wastewater

Although, Polonite® also incidentally absorbed most of the Fluorine present in the wastewater making it a questionable choice for the process, as Fluorine is desirable in large quantities in the sediments if used as slag builders. As no ICP results were received from the column test only pH and conductivity are discussed.

Fluorine | F2 - PubChem
Fluorine | F2 - PubChem

TERRESTRIAL FATE: Elemental ,fluorine, was found to be very mobile in both sandy and sandy loam soils (1). ,Fluorine, decomposes in water to form hydrofluoric ,acid, (HF), hydrogen peroxide (H2O2) and oxygen fluoride (OF2) (2); therefore, ,fluorine, is expected to decompose in moist soils as it reacts with water (SRC).

Fluoride ion adsorption from wastewater using magnesium(II ...
Fluoride ion adsorption from wastewater using magnesium(II ...

The effect of temperature on the adsorption capacity of, fluoride ion, on the different zeolites (initial, concentration, of, fluoride:, C 0 = 80 mg/L; pH value of, wastewater:, pH = 6–7). Effect of adsorbent dosage

Fluorine reagent | Chemical Product Catalog - Chemsrc
Fluorine reagent | Chemical Product Catalog - Chemsrc

The minimum detection amount is 0.2mg/ Kg. 3. ,Fluorine reagent, spectrophotometry A method for determining the fluoride ,content, in surface water, groundwater and industrial ,wastewater,. The principle is: fluoride ,ion, reacts with ,fluorine reagent, and lanthanum nitrate in a buffer medium of pH 4.1 to form a blue ternary complex.

Fluoride ion adsorption from wastewater using magnesium(II ...
Fluoride ion adsorption from wastewater using magnesium(II ...

The effect of temperature on the adsorption capacity of fluoride ion on the different zeolites (initial concentration of fluoride: C 0 = 80 mg/L; pH value of wastewater: pH = …

Determination of adsorbable organically bound fluorine ...
Determination of adsorbable organically bound fluorine ...

10/7/2019, · The AOF values of surface water varied between 2.3 and 24.5 μg/L. The concentrations of AOF in 85% of the wastewater discharges were between 2.0 and 8.5 μg/L, while 15% of the samples were below the limit of quantitation (LOQ = 2 μg/L AOF). In 56% of the ground water samples the values were below the LOQ.

Captan | C9H8Cl3NO2S - PubChem
Captan | C9H8Cl3NO2S - PubChem

Captan, is a dicarboximide that is 3a,4,7,7a-tetrahydrophthalimide in which the hydrogen attached to the nitrogen is replaced by a trichloromethyl group. A non-systemic fungicide introduced in the 1950s, it is widely used for the control of fungal diseases in fruits, vegetables, and ornamental crops.

Removal of Fluorine from Wet-Process Phosphoric Acid Using ...
Removal of Fluorine from Wet-Process Phosphoric Acid Using ...

The solution of fluoride (0.1 mg/mL) was prepared using NaF (GB/T1264) that had been dried to a constant weight at 120 °C. Then, 1, 2, 3, 5, and 10 mL of the fluorine ,ion, solution were transferred to five separate 50 mL volumetric flasks. Next, the concentration of fluoride in each flask was measured with the ,ion,-specific electrode method.

Fluorine | F2 - PubChem
Fluorine | F2 - PubChem

TERRESTRIAL FATE: Elemental fluorine was found to be very mobile in both sandy and sandy loam soils (1). Fluorine decomposes in water to form hydrofluoric ,acid, (HF), hydrogen peroxide (H2O2) and oxygen fluoride (OF2) (2); therefore, fluorine is expected to decompose …

Total fluorine extractable organic fluorine ...
Total fluorine extractable organic fluorine ...

1/1/2009, · Around 100 mL extract in Milli-Q water was passed through the pre-conditioned cartridges at a rate of 1 drop/s. In order to remove inorganic ,fluorine, from the samples, 20 mL 0.01% ammonium/water was used. A total of 3 × 10 mL Milli-Q water was used to wash off the remaining ammonium in the cartridge.

Sulfur - Wikipedia
Sulfur - Wikipedia

Sulfur (in traditional lay Commonwealth English: sulphur) is a chemical element with the symbol S and atomic number 16. It is abundant, multivalent and nonmetallic.Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S 8.Elemental sulfur is a bright yellow, crystalline solid at room temperature. Sulfur is the tenth most common element by mass in the ...

Fluorine - Wikipedia
Fluorine - Wikipedia

Elemental fluorine and virtually all fluorine compounds are produced from hydrogen fluoride or its aqueous solutions, hydrofluoric acid. Hydrogen fluoride is produced in kilns by the endothermic reaction of fluorite (CaF 2) with sulfuric acid: CaF 2 + H 2 SO 4 → 2 HF(g) + CaSO 4. The gaseous HF can then be absorbed in water or liquefied.

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