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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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oil and gas geology
(PDF) Determination of Hg in water and wastewater samples ...
(PDF) Determination of Hg in water and wastewater samples ...

Detection of Hg(II) ion concentration in water and wastewater can be done by using cold vapor atomic absorption spectrometry (CV-AAS) [11].

Ion-capture electrodialysis using multifunctional ...
Ion-capture electrodialysis using multifunctional ...

15/4/2021, · Fig. 1 Design of composite membranes and application in ,ion,-capture electrodialysis (IC-ED). (A and B) Tunable composite membranes were prepared by embedding PAFs with selective ,ion, binding sites into cation exchange polymer matrices.(C) We demonstrate the use of these adsorptive membranes in an electrodialysis-based process for the selective capture of target cations (right-hand side) from ...

Recovery of Copper from Wastewater by Cementation Technique
Recovery of Copper from Wastewater by Cementation Technique

5/4/2014, · Rates ,of copper, ions removal from waste solution by ,cementation,, using an iron rod that was covered with the screen, and the ,cementation, kinetics ,of copper, deposition from sulfate solutions onto iron were studied under different conditions of initial ,copper, ions concentration, initial pH of the solution and solution velocity. It was found that the rate ,of copper ion, removal by ,cementation, onto ...

EPA Method 200.8: Determination of Trace Elements in ...
EPA Method 200.8: Determination of Trace Elements in ...

determination, of analytes in drinking water where sample turbidity is <1 NTU, the sample is made ready for analysis by the appropriate addition of nitric ,acid,, and then diluted to a predetermined volume and mixed before analysis. 2.2 The method describes the multi-element ,determination, …

Extracellular polymeric substances (EPS) of microbial ...
Extracellular polymeric substances (EPS) of microbial ...

1/11/2010, · The ,ion, bridging interactions between multivalent cations and EPS also play a key role in microbial flocculation (Sobeck and Higgins, 2002, Nguyen et al., 2007). Multivalent cations (e.g., Ca 2+ and Mg 2+ ) tend to bridge with EPS and thus improve the flocculation of microbial aggregates ( Higgins and Novak, 1997 , Liu et al., 2007a , Liu et al., 2007b ).

Manual of Procedure for Chemical and Instrumental Analysis of
Manual of Procedure for Chemical and Instrumental Analysis of

6.7 ,determination, of biochemical oxygen demand (bod) in ,waste water, and effluents 210 6.8 ,determination, of dissolved oxygen in water and ,wastewater, 212 6.9 ,determination, of phenolic compounds as c 6h 5oh(direct colorimetric method) 214 6.10 ,determination, of oil and grease in water and ,waste water, 216

Copper Biotic Ligand Model | Water Quality Standards ...
Copper Biotic Ligand Model | Water Quality Standards ...

"Evaluation ,of Copper, Toxicity and Water Effect Ratio for Treated Municipal ,Wastewater,," Final Report prepared for the Pennsylvania ,Copper, Group. Heijerick, D., C.R. Janssen and W.M. De Coen, 2001. "The Combined Effects of Hardness, pH and Dissolved Organic Carbon on the Chronic Toxicity to Daphnia magna: Development of a Surface Response Model," Environmental Science and Technology, in ...

Extracellular polymeric substances (EPS) of microbial ...
Extracellular polymeric substances (EPS) of microbial ...

1/11/2010, · The ,ion, bridging interactions between multivalent cations and EPS also play a key role in microbial flocculation (Sobeck and Higgins, 2002, Nguyen et al., 2007). Multivalent cations (e.g., Ca 2+ and Mg 2+ ) tend to bridge with EPS and thus improve the flocculation of microbial aggregates ( Higgins and Novak, 1997 , Liu et al., 2007a , Liu et al., 2007b ).

EPA Method 200.8: Determination of Trace Elements in ...
EPA Method 200.8: Determination of Trace Elements in ...

determination, of analytes in drinking water where sample turbidity is <1 NTU, the sample is made ready for analysis by the appropriate addition of nitric ,acid,, and then diluted to a predetermined volume and mixed before analysis. 2.2 The method describes the multi-element ,determination, …

Hydrofluoric acid | HF - PubChem
Hydrofluoric acid | HF - PubChem

Hydrofluoric acid, is an irritant to the mucosa of the upper and lower portions of the respiratory tract. As in ocular tissues, concentrations as low as 5 mg/L (5 ppm) may produce irritation to the nasal mucosa. When ,hydrofluoric acid, is present in concentrations greater than 48%, the solution fumes, adding to the volatile airborne fraction.

Determination of Phosphorus in Copper-Rich Wastewater by ...
Determination of Phosphorus in Copper-Rich Wastewater by ...

These procedures were successfully applied to the analysis of phosphorus in ,copper,-rich ,wastewater,. (Received on August 9, 2001; Accepted on September 13, 2001) Phosphorus is frequently required to be determined in ,copper,-rich industrial processing and waste solutions. Several different approaches have been employed for the ,determination, of P in

Application Finder | Metrohm
Application Finder | Metrohm

Transition metals – ,copper,, zinc, cadmium, lead, thallium Halogens – fluoride, bromide, iodide Sulfur – elemental ,Acid, number, TAN, base number, TBN Organometallic compounds Kjeldahl nitrogen Phosphorus – organic Diffusion coefficient, kinetics, mass transport Disinfectant Lactones Herbicides, fungicides, pesticides

Copper Biotic Ligand Model | Water Quality Standards ...
Copper Biotic Ligand Model | Water Quality Standards ...

"Evaluation ,of Copper, Toxicity and Water Effect Ratio for Treated Municipal ,Wastewater,," Final Report prepared for the Pennsylvania ,Copper, Group. Heijerick, D., C.R. Janssen and W.M. De Coen, 2001. "The Combined Effects of Hardness, pH and Dissolved Organic Carbon on the Chronic Toxicity to Daphnia magna: Development of a Surface Response Model," Environmental Science and Technology, in ...

Masterflex Tubing Chemical Compatibility Database from ...
Masterflex Tubing Chemical Compatibility Database from ...

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Trace and Heavy Metals in Wastewater - SlideShare
Trace and Heavy Metals in Wastewater - SlideShare

New processes have been developed and extensively used for the heavy metal removal from ,wastewater, such as: 1. Biosorption 2. Neutralization 3. Precipitation 4. ,Ion, exchange 5. Adsorption ,Wastewater, Analysis: Trace and Heavy Metals 14. ,DETERMINATION, TECHNIQUES ,HEAVYMETALS IN WASTE WATER, SAMPLES 15. General Steps 16.

Cysteine | C3H7NO2S - PubChem
Cysteine | C3H7NO2S - PubChem

Cysteine, is a non-essential sulfur-containing amino ,acid, in humans, related to cystine, ,Cysteine, is important for protein synthesis, detoxification, and diverse metabolic functions.Found in beta-keratin, the main protein in nails, skin, and hair, ,Cysteine, is important in collagen production, as well as …

Ion chromatography - Wikipedia
Ion chromatography - Wikipedia

Ion chromatography, (or ,ion,-exchange chromatography) separates ions and polar molecules based on their affinity to the ,ion, exchanger. It works on almost any kind of charged molecule—including large proteins, small nucleotides, and amino acids.However, ,ion chromatography, must be done in conditions that are one unit away from the isoelectric point of a protein.

Critical review of advanced oxidation processes in organic ...
Critical review of advanced oxidation processes in organic ...

1. Introduction. With socio-economic development, environmental pollution is a growing problem, especially organic ,wastewater, pollution (Rueda-Marquez et al., 2020).Organic pollutants in ,wastewater, pose a threat not only to water resources, but also to human health (Akpan and Hameed, 2011).The most common used ,wastewater, treatment technologies are divided into physical, chemical, and ...

(PDF) A SPECTROPHOTOMETRICAL METHOD FOR DETERMINATION OF ...
(PDF) A SPECTROPHOTOMETRICAL METHOD FOR DETERMINATION OF ...

Two reactions are necessary:(a) The reaction between the protein molecules and ,copper, ions in an alkaline solution; ,A SPECTROPHOTOMETRICAL METHOD FOR DETERMINATION OF, DISSOLVED PROTEINS IN WATER OR ,WASTEWATER, By: Lawrence K. Wang, Mu-Hao Sung Wang and Aimee E. Thayer DEVELOPMENT OF CALIBRATION CURVES USING PROTEIN STANDARDS 7.1.

Critical review of advanced oxidation processes in organic ...
Critical review of advanced oxidation processes in organic ...

1. Introduction. With socio-economic development, environmental pollution is a growing problem, especially organic ,wastewater, pollution (Rueda-Marquez et al., 2020).Organic pollutants in ,wastewater, pose a threat not only to water resources, but also to human health (Akpan and Hameed, 2011).The most common used ,wastewater, treatment technologies are divided into physical, chemical, and ...

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