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Acid waste water is discharged into the river

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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Acid waste water is discharged into the river
Pollution of Water Sources from Agricultural and ...
Pollution of Water Sources from Agricultural and ...

26/2/2019, · For chronic toxicity, the consumption of NO 3 ˉ at levels higher than 50 ppm has been associated with (i) increased thyroid volume and subclinical thyroid disorders, (ii) increased incidence of goiter in children, (iii) carcinogenicity due to the conversion of NO 3 ˉ to NO 2 ˉ and formation of genotoxic/carcinogenic N-nitroso compounds, such as N-nitrosamines and N-nitrosamides, some of which are known ,carcinogens, …

IJERPH | Free Full-Text | Catalytic Oxidation Process for ...
IJERPH | Free Full-Text | Catalytic Oxidation Process for ...

Hydrogen, peroxide is electrogenerated in ,acidic, solutions by the two-electron reduction of oxygen on the cathode surface according to Equation (10) . O 2 + 2H + + 2e - → H 2 O 2 (10)

55. Environmental Pollution Control - ILO Encyclopaedia
55. Environmental Pollution Control - ILO Encyclopaedia

Air pollution management aims at the ,elimination,, or reduction to acceptable levels, of airborne gaseous pollutants, suspended particulate matter and physical and, to a certain extent, biological agents whose presence in the atmosphere can cause adverse effects on human health (e.g., irritation, increase of incidence or prevalence of respiratory diseases, morbidity, cancer, excess mortality) or welfare (e.g., …

Handbook For Analytical Quality Control In Water and ...
Handbook For Analytical Quality Control In Water and ...

It is not advisable to store CO2-free water for extended periods. 2.2.3 lon-FreeWater A multipurpose high purity water, free from trace amounts of the common ions, may be conveniently prepared by slowly passing distilled water through an ion-exchange column containing one part of a strongly ,acidic, cation-exchange resin in the hydroxyl form.

(PDF) Removal of total ammonia nitrogen nitrate and total ...
(PDF) Removal of total ammonia nitrogen nitrate and total ...

Autotrophic denitrifying microorganisms utilize ,hydrogen, gas as the electron donor that is produced on the cathode surface by electrolysis of water. These autotrophic denitrifying microorganisms are called autohydrogenotrophs [99]. ,Hydrogen, gas is used to reduce nitrate to nitrite (NO 2 -) which further reacts with ,hydrogen, to form nitric oxide (NO).

Hydrogen Cyanide and Cyanides: Human Health Aspects ...
Hydrogen Cyanide and Cyanides: Human Health Aspects ...

Hydrogen cyanide, (HCN) is a colourless or pale blue liquid or gas with a faint bitter almond-like odour. Common synonyms are hydrocyanic acid and prussic acid. ,Hydrogen cyanide, is a very weak acid, with a pK a value of 9.22 at 25 °C. It is soluble in water and alcohol.

Reducing Hexavalent Chromium to Trivalent Chromium with ...
Reducing Hexavalent Chromium to Trivalent Chromium with ...

Results of the water-leaching studies showed that the H2S treatment decreased Cr (VI) levels in the column effluent by 90% to nearly 100%. Repetitive extns. by water and phosphate solns. echoed these results, and the extn. by HCl released only 35-40% as much Cr in the treated as in the untreated samples.

Handbook For Analytical Quality Control In Water and ...
Handbook For Analytical Quality Control In Water and ...

It is not advisable to store CO2-free water for extended periods. 2.2.3 lon-FreeWater A multipurpose high purity water, free from trace amounts of the common ions, may be conveniently prepared by slowly passing distilled water through an ion-exchange column containing one part of a strongly ,acidic, cation-exchange resin in the hydroxyl form.

Treatment of petroleum refinery petrochemical and ...
Treatment of petroleum refinery petrochemical and ...

Shuckrow (56) indicated ,hydrogen, sulfide was a major problem in pilot- plant operations treating a strong municipal ,wastewater,. This study documented the nonsorbable residual that might be present in ,wastewater, and the difficul- ties that may be encountered in controlling the ,hydrogen, sulfide.

Two Chemicals Listed and One Proposed as Carcinogens ...
Two Chemicals Listed and One Proposed as Carcinogens ...

In a separate strategy, researchers have tried using contaminants in ,wastewater, to enhance ,hydrogen, fuel generation. While titanium-based catalysts worked for both removing contaminants and generating ,hydrogen,, the efficiencies were lower than expected for both …

IJERPH | Free Full-Text | Catalytic Oxidation Process for ...
IJERPH | Free Full-Text | Catalytic Oxidation Process for ...

Hydrogen, peroxide is electrogenerated ,in acidic, solutions by the two-electron reduction of oxygen on the cathode surface according to Equation (10) . O 2 + 2H + + 2e - → H 2 O 2 (10)

Analysis of control parameters in a TiO /UV reacting ...
Analysis of control parameters in a TiO /UV reacting ...

The ,elimination, of aniline and benzothiazole is shown in Figure 2, when carrying out the oxidation tests performing at different pH values. The results have been compared, showing that in the case of aniline removal (Fig. 2a) the photocatalytic oxidation rate is favored by operating at alkaline pH values (above pH=12.0). When employing pH 2

A Review on Advanced Oxidation Processes for Effective ...
A Review on Advanced Oxidation Processes for Effective ...

This ozone decomposition process can be accelerated by escalating the pH or ,hydrogen, peroxide concentration. 26 It is well known that Ozone is the predominant disinfectant in water while OH and O 3 both act as oxidants in the oxidation process in water with O 3 being highly selective and * OH is being highly reactive. 26 Hence ozonation can simultaneously be used for disinfection and oxidation.

Water treatment items
Water treatment items

More plates and power means the surface area the water has to spend in the ionization process is longer. Longer times in the chamber means that you will get a better pH spectrum on the alkaline and ,acidic, side PLUS increase the -ORP at drinkable pH levels (9.5 to 10.5 pH). More molecular ,hydrogen, is also produced at these beneficial pH levels.

Federal Register :: Clean Water Act Methods Update Rule ...
Federal Register :: Clean Water Act Methods Update Rule ...

28/8/2017, · SM 4500-H + B-2011, ,hydrogen, ion (pH), electrometric measurement. 36. SM 4500-NH 3 (B-H)-2011, ammonia (as nitrogen), manual distillation or gas diffusion (pH > 11), followed by any of the following: Titration, electrode, manual phenate, salicylate, or other substituted phenols in Berthelot reaction based methods; automated phenate, salicylate, or other substituted phenols in Berthelot ...

Federal Register :: Clean Water Act Methods Update Rule ...
Federal Register :: Clean Water Act Methods Update Rule ...

28/8/2017, · SM 4500-H + B-2011, ,hydrogen, ion (pH), electrometric measurement. 36. SM 4500-NH 3 (B-H)-2011, ammonia (as nitrogen), manual distillation or gas diffusion (pH > 11), followed by any of the following: Titration, electrode, manual phenate, salicylate, or other substituted phenols in Berthelot reaction based methods; automated phenate, salicylate, or other substituted phenols in Berthelot ...

Journal of Water and Environment Technology
Journal of Water and Environment Technology

Liquid-solid two-phase fluidized bed type reactor was operated for struvite recovery for the purpose of developing the reactor that can be applied to ,wastewater, having low PO 4-P concentrations.In area-wide sewage sludge treatment plant, the reactor was examined to recover struvite from thickener effluent, whose PO 4-P concentration was around 40 mg/L.

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