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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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Original Research Estimation and Bio-Availability of Toxic ...
Original Research Estimation and Bio-Availability of Toxic ...

of ,heavy, metals into the food chain) and the following accumulation along the food chain is a potential threat to animal and human health, particularly crops [17]. Most studies have shown that the use of ,wastewater, contaminated with ,heavy, metals for irrigation over a long period of time increases the ,heavy metal, contents of soils

Biological treatment of wastewater produced during ...
Biological treatment of wastewater produced during ...

1/2/2010, · In the treatment of the simulated ,wastewater,, it is found that the bacteria can grow in solutions with high metal concentrations such as 8000 g m −3 of Cr and 13,000 g m −3 of Ni, but a Li concentration of 5000 g m −3 in a pure 9 K medium significantly suppresses the …

Identification of Two Iron− Chromate Precipitates in a Cr ...
Identification of Two Iron− Chromate Precipitates in a Cr ...

26/2/1996, · A study on the sulphuric ,acid, leaching of copper converter slag in the presence of ,dichromate,. Minerals Engineering 2004, 17 (3) , 465-467. DOI: 10.1016/j.mineng.2003.11.002. Dirk Baron, Carl D. Palmer. Solid-solution aqueous-solution reactions between ,jarosite, (KFe3(SO4)2(OH)6) and its chromate analog.

AQUEOUS PROCESSING (General Abstract Session)
AQUEOUS PROCESSING (General Abstract Session)

Acidic sulphate-,containing wastewater, streams are currently neutralized with lime before discharge to the environment. The most common neutralization process design involves a one-step neutralization followed by a settling tank that separates an ultra-fine, low solids density gypsum by-product.

Waste treatment processes
Waste treatment processes

D8: Biological ,treatment, not specified elsewhere in this Annex, giving rise to compounds or mixtures which are removed according to one of the procedures listed in points D1 to D12 Physico-chemical ,treatment, not specified elsewhere in this Annex giving rise to compounds or mixtures removed according to one of the procedures listed in points D1 to D12 (eg evaporation, drying, calcination, etc.)

US5137640A - Process for the separation of arsenic acid ...
US5137640A - Process for the separation of arsenic acid ...

A process for reducing arsenic levels in a solution ,containing, sulfuric ,acid,, water, and arsenic ,acid, by adding copper or a copper-,containing, compound to the solution to form dissolved copper arsenate, adding alkali solution to precipitate the copper arsenate and to neutralize arsenic and sulfuric ,acid,.

Identification of Two Iron− Chromate Precipitates in a Cr ...
Identification of Two Iron− Chromate Precipitates in a Cr ...

Two iron−chromate precipitates, KFe3(CrO4)2(OH)6 (the chromate analog of the sulfate mineral ,jarosite,) and KFe(CrO4)2·2H2O, were discovered in a soil contaminated by chrome plating solutions. The precipitates were identified by electron microscopy and powder X-ray diffraction.

Identification of Two Iron− Chromate Precipitates in a Cr ...
Identification of Two Iron− Chromate Precipitates in a Cr ...

26/2/1996, · A study on the sulphuric ,acid, leaching of copper converter slag in the presence of ,dichromate,. Minerals Engineering 2004, 17 (3) , 465-467. DOI: 10.1016/j.mineng.2003.11.002. Dirk Baron, Carl D. Palmer. Solid-solution aqueous-solution reactions between ,jarosite, (KFe3(SO4)2(OH)6) and its chromate analog.

Physicochemical Determination of Pollutants in Wastewater ...
Physicochemical Determination of Pollutants in Wastewater ...

Physicochemical Determination of Pollutants in Wastewater, in Dheradun Introduction ,Heavy, metals are present in food in very minute quantities; the existence is due to their role in body metabolism, it has been establish that whatever is taken as food might cause metabolic disturbance if it ,does, not contain the permissible upper and lower limits of ,heavy, metals.

Biomining of gallium and germanium containing ores ...
Biomining of gallium and germanium containing ores ...

The gallium- or germanium-,containing, host material or ore (e.g. ,jarosite,, geothite, limonite, hematite, etc.) is preferably first crushed, comminuted or otherwise broken down into smaller pieces or particles. Generally the smaller the size of the crushed ore the greater the amount of desired metal compound extractable during the process.

Waste treatment processes
Waste treatment processes

They indicate, for the various CER Codes, the tested procedures for the treatment of WEEE code for recovery or disposal. The results of the research are published with the aim of contributing to the development of new, innovative treatment waste processes oriented towards the end of the qualification of waste ("End Of Waste").

Metal Concentration Standards for Land Application of ...
Metal Concentration Standards for Land Application of ...

This bulletin provides the general public a quick reference for some commonly used standards for ,metal, concentrations in biosolids and various by-products intended for land application. Most of the standards presented here are regulatory; however, we have also included information on average ,metal, concentrations in agricultural soils.

Phosphorus Recovery by Struvite Crystallization from ...
Phosphorus Recovery by Struvite Crystallization from ...

4/4/2016, · However, as livestock ,wastewater, is full of impurities, especially the ,heavy metal, ions, the struvite recovered from livestock ,wastewater, still contain more or less ,heavy metal, ions. From livestock-based struvite, toxic substances may diffuse into the aquatic environment or accumulate in soils and have an adverse effect on the human health and environment [ 56 , 57 ].

Long-term Effect of Mixed Wastewater Irrigation on Soil ...
Long-term Effect of Mixed Wastewater Irrigation on Soil ...

Wastewater, contains essential elements for plant growth as well as ,heavy, metals which may be toxic for plant and human. In the northern regions of the Nile Delta, mixed water (,wastewater, mixed with fresh water) is used in land irrigation long time ago. The present study was conducted to assess the impact of long-term irrigation with mixed water (MW); compared to Nile fresh water (FW), on ...

Removal of chemical oxygen demand (COD) and heavy metals ...
Removal of chemical oxygen demand (COD) and heavy metals ...

After 15 days of treatment, the COD value from ,wastewater, treated with coated Pt and Pt-free catalyst was 70.37 mg/L and 173.98 mg/L, respectively. The maximum voltages of Pt catalyst and Pt-free catalyst across the SCMFCs were 378.96 and 187.23 mV, respectively ( Figure 4(b) ).

(PDF) Olive Mills Wastewater Treatment Using Local Natural ...
(PDF) Olive Mills Wastewater Treatment Using Local Natural ...

Natural clay was calcined at several temperatures (350–550°C), some of which were further subjected to ,acid, treatment using 1, 3, and 5 M-HCl solutions at 85°C.

Minerals | Free Full-Text | Advances towards a Clean ...
Minerals | Free Full-Text | Advances towards a Clean ...

Seed crystal is added to ,acid, solution, and the ,jarosite, is precipitated by the hydrothermal treatment. After the removal of iron, the basic chromium sulfate is obtained by adjusting the basicity of the solution with sodium carbonate, separation, and drying.

Ethylenediaminetetraacetic acid - Wikipedia
Ethylenediaminetetraacetic acid - Wikipedia

Polyaspartic ,acid,, like IDS, binds to calcium and other ,heavy metal, ions. It has many practical applications including corrosion inhibitors, ,wastewater, additives, and agricultural polymers. A Polyaspartic ,acid,-based laundry detergent was the first laundry …

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