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Water Pressure Booster

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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Water Pressure Booster
ORPTION COMPARISON OF TRIVALENT CHROMIUM ON …
ORPTION COMPARISON OF TRIVALENT CHROMIUM ON …

charcoal without impregnation, impregnated with potassium hydroxide, zinc chloride, and phosphoric ,acid, was 98.9%, 98.8%, 8.9% and 2.5%, respectively. The study could be helpful to design the sorption of ,trivalent chromium, from the tannery ,wastewater, in-house prior to discharge. Keywords: Sorption, Cr (III) extraction, Impregnation, Environment

Do You Need to Remove Chromium from Your Industrial Water ...
Do You Need to Remove Chromium from Your Industrial Water ...

This is because chromium found in industrial wastewater exists as either, trivalent chromium (,Cr III) or hexavalent chromium (Cr VI). Of these oxidative states, Cr III is far less toxic, and there is even some research to suggest that small amounts are nutritionally beneficial.

Chemical precipitation method for chromium removal and its ...
Chemical precipitation method for chromium removal and its ...

Chromium(III) salts are the most widely used chemicals for, tanning, processes, but only about 60-70% of total, chromium, salts reacts with the hides and about 30-40% of the, chromium, remain in the solids and liquid, wastes, (especially spent, tanning, solutions).

Reduction Monitoring in the Chromium Wastewater Treatment ...
Reduction Monitoring in the Chromium Wastewater Treatment ...

First, hexavalent chromium, either in the form of chromate or dichromate, is reduced to trivalent chromium. Wastewater flows into the first reaction tank, where the pH is measured and sulfuric acid is automatically brought into the process until a pH set point value in the acidic range is achieved. The

Water hyacinth biochar for trivalent chromium adsorption ...
Water hyacinth biochar for trivalent chromium adsorption ...

1/2/2020, · Hashem et al. (2015) showed that the amount of, chrom,ium, in the discharged chrome tanning wastewater ranged between 2656 and 5420 ​mg/L., The universal oxidative states of chromium are trivalent and hexavalent. Levis et al. (1978) reported that within the cell Cr (III) unites to nucleotide bases in DNA to provide genotoxic effects.

Methods of chromium and heavy metals removal from wastewater
Methods of chromium and heavy metals removal from wastewater

The reagent treatment of chromium containing wastewater restores the hexavalent chromium to trivalent and precipitates it. The reducing agents are sulfur (sodium sulfite, sodium bisulfite) copperas, scrap steel and others. In practice there are two methods of wastewater treatment to remove chrome:

Trivalent Chromium Ion Adsorption on Various Types of ...
Trivalent Chromium Ion Adsorption on Various Types of ...

A synthetic ,chromium, nitrate [Cr (NO 3) 3 ⋅ 9 H 2 O] solution adjusted to pH i = 3.2 at 112 mg L − 1 was used. The results revealed that CWS had the best adsorption capacity for ,chromium,, followed by SWS, and adsorption capacity of the different ,wastewater, sludges was in the following order: CWS > SWS ⩾ MWS > PWS > AWS.

Reduction Monitoring in the Chromium Wastewater Treatment ...
Reduction Monitoring in the Chromium Wastewater Treatment ...

First, hexavalent chromium, either in the form of chromate or dichromate, is reduced to trivalent chromium. Wastewater flows into the first reaction tank, where the pH is measured and, sulfuric acid, is automatically brought into the process until a pH set point value in the acidic range is achieved.

Chemical precipitation method for chromium removal and its ...
Chemical precipitation method for chromium removal and its ...

removing and recovering ,trivalent chromium, from tannery ,wastewater, via chemical ,precipitation, with sodium hydroxide (NaOH), calcium hydroxide (Ca(OH) 2) and magnesium oxide (MgO). The effects of pH, stirring time, settling rate and sludge volume were studied in batch experiments. Flame atomic

Troubles with trivalent chromium precipitation
Troubles with trivalent chromium precipitation

Troubles with trivalent chromium precipitation, 2006. Hello all Usually I work with hexavalent chrome ,wastewater,. The ,wastewater, is provided by a de-tanning process and the final slurry is a mix among chrome and little bit of organic fibers.

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

Therefore, it should be removed from contaminated waters. Its redn. to ,trivalent chromium, can be beneficial because a more mobile and more toxic ,chromium, species is converted to a less mobile and less toxic form. During the last two decades, there has been important interest in using zero-valent iron (ZVI) as a Cr(VI)-reducing agent.

Chromium Removal from Wastewater by Reverse Osmosis
Chromium Removal from Wastewater by Reverse Osmosis

study describes the removal of ,chromium, from ,wastewater, using pressure-driven membrane separation processes. It describes the rejection of ,trivalent chromium, using a commercial membrane for reverse osmosis typed RO98pHt (Alfa Laval, Sweden). Model solutions of ,chromium, were used for performing of separation experiments.

Chromium - DuPont
Chromium - DuPont

While trivalent chromium (Cr3+) is not considered to be harmful, hexavalent chromium (Cr6+) is toxic. If the chromium ion to remove from the wastewater stream is in the +3 oxidation state, then it typically behaves as a cation, so a cation exchange resin such as AmberSep™ G26 H Resin is recommended.

Chromium Removal from Wastewater by Reverse Osmosis
Chromium Removal from Wastewater by Reverse Osmosis

study describes the removal of ,chromium, from ,wastewater, using pressure-driven membrane separation processes. It describes the rejection of ,trivalent chromium, using a commercial membrane for reverse osmosis typed RO98pHt (Alfa Laval, Sweden). Model solutions of ,chromium, were used for performing of separation experiments.

Removal of trivalent chromium in the complex state of ...
Removal of trivalent chromium in the complex state of ...

15/1/2014, · It can be seen that the Cr(III) removal efficiencies of oxalic acid dissociated wastewater and, malonic acid disso,ciated wastewater were pretty high up to 99.5% and 99.8%, respectively. However, the Cr(III) removal efficiency was significantly lower for the complex wastewaters than that of …

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