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Principle and chemical equation of treating acid wastewater caused by sulfuric acid

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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Principle and chemical equation of treating acid wastewater caused by sulfuric acid
Uptake of Hexavalent Chromium in Electroplating Wastewater ...
Uptake of Hexavalent Chromium in Electroplating Wastewater ...

Modified sand adsorbent adsorbed chromium from wastewater for color glass preparation, turning the contaminant into a useful resource. Uptake of Hexavalent Chromium in Electroplating Wastewater by Hydrothermally Treated and Functionalized Sand and Its Sustainable Reutilization for Glass Production | ACS Sustainable Chemistry & Engineering

Recent bioreduction of hexavalent chromium in wastewater ...
Recent bioreduction of hexavalent chromium in wastewater ...

25/11/2017, · ,Hexavalent chromium, Cr(VI) is an important water pollutant. Even at Cr(VI) levels measuring in the parts per billion (ppb), research has shown it to be toxic [6] . Cr(VI) can originate from different anthropogenic activities such as chromite mining, leather tanning, pigment synthesis, electroplating and metal finishing.

Trevi Environmental Solutions - Chromium reduction
Trevi Environmental Solutions - Chromium reduction

The ,wastewater, which contains ,hexavalent chromium, is then subjected to a ,chromium, reduction, which generates reduced ,chromium, (Cr 3+) ,wastewater,. The latter is further treated with the other ,wastewater, streams in the coagulation-flocculation process. The source-separation of ,wastewater, loaded with ,hexavalent chromium, and other wastewaters reduces chemical costs and allows to build compact water ,treatment, plants. In order to ensure the desired effluent quality, the sizing of a new ,wastewater, ...

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

chemical plants contains toxic forms of ,hexavalent chromium, such as chromate and dichromate. The ,hexavalent chromium, in this ,wastewater, must be reduced before the water can be discharged. This requires a two-step process: ,hexavalent chromium, (CR. 6) is reduced to trivalent ,chromium, (CR. 3); and CR. 3. is precipitated as ,chromium, hydroxide. As the oxidation-

Removal of hexavalent chromium from electroplating ...
Removal of hexavalent chromium from electroplating ...

15/4/2016, · In general, the treatment of galvanic, wastewaters containing hexavalent chromium, involves the following steps , , : (i) reduction of Cr(VI) to Cr(III) under acidic conditions (pH between 2 and 3) through the addition of ferric chloride (FeCl 2), sodium sulfide (Na 2 S) or sodium bisulfite (NaHSO 3); (ii) oxidation of Fe(II) to Fe(III) with H 2 O 2, (iii) precipitation of metals through the addition of hydroxides …

Recent bioreduction of hexavalent chromium in wastewater ...
Recent bioreduction of hexavalent chromium in wastewater ...

25/11/2017, · ,Hexavalent chromium, Cr(VI) is an important water pollutant. Even at Cr(VI) levels measuring in the parts per billion (ppb), research has shown it to be toxic [6] . Cr(VI) can originate from different anthropogenic activities such as chromite mining, leather tanning, pigment synthesis, electroplating and metal finishing.

Effect of Hexavalent Chromium on Performance of Membrane ...
Effect of Hexavalent Chromium on Performance of Membrane ...

The presence of toxic ,hexavalent chromium, poses a great challenge in biological ,wastewater treatment,. In this study, the performance of a membrane bioreactor (MBR) for the ,treatment, of synthetic domestic ,wastewater, in the presence of ,chromium, was investigated.

Removal of hexavalent chromium from wastewater by acid ...
Removal of hexavalent chromium from wastewater by acid ...

(2016). Removal of ,hexavalent chromium, from ,wastewater, by ,acid,-washed zero-valent aluminum. Desalination and Water ,Treatment,: Vol. 57, No. 12, pp. 5592-5600.

Removal of hexavalent chromium from electroplating ...
Removal of hexavalent chromium from electroplating ...

15/4/2016, · In general, the treatment of galvanic wastewaters containing hexavalent chromium involves the following steps , , : (i) reduction of Cr(VI) to Cr(III) under acidic conditions (pH between 2 and 3) through the addition of ferric chloride (FeCl 2), sodium sulfide (Na 2 S) or sodium bisulfite (NaHSO 3); (ii) oxidation of Fe(II) to Fe(III) with H 2 O 2, (iii) precipitation of metals through the addition of hydroxides …

Removal of Hexavalent Chromium-Contaminated Water and ...
Removal of Hexavalent Chromium-Contaminated Water and ...

Study on anaerobic ,treatment, of ,wastewater containing hexavalent chromium, Xu, Y.; Xiao, H.; Sun, S. Absorption of metals by natural polymers generated from seafood processing wastes

Removal of Hexavalent Chromium-Contaminated Water and ...
Removal of Hexavalent Chromium-Contaminated Water and ...

20/11/2008, · Xu, Y., Xiao, H., & Sun, S. (2005). Study on anaerobic ,treatment, of ,wastewater containing hexavalent chromium,. Journal of Zhejiang University Science, 6(6), 574–579. Article CAS Google Scholar Yang, T. C., & Zall, R. R. (1984). Absorption of metals by natural polymers generated from seafood processing wastes.

Removal of hexavalent chromium from wastewater by acid ...
Removal of hexavalent chromium from wastewater by acid ...

This paper deals with the ,treatment, of ,hexavalent chromium, (Cr(VI)) and its removal mechanism using ,acid,-washed zero-valent aluminum (ZVAl). The ,acid,-washed ZVAl before and after reaction was characterized by scanning electron microscope, X-ray diffraction, and X-ray photoelectron spectroscopy. The influence factors such as ZVAl loading, ,acid, washing time, and pH values on Cr(VI) removal were...

DOWEX Ion Exchange Resins - DuPont
DOWEX Ion Exchange Resins - DuPont

reduce, the sodium content of the water and enable environmentally safe discharge. Introduction Water is typically a ,co,-product of natural gas production. When natural gas is produced from certain coal bed methane fields in the Powder River Basin of Wyoming, the water is very high in sodium.

Removal of hexavalent chromium from wastewater by acid ...
Removal of hexavalent chromium from wastewater by acid ...

(2016). Removal of ,hexavalent chromium, from ,wastewater, by ,acid,-washed zero-valent aluminum. Desalination and Water Treatment: Vol. 57, No. 12, pp. 5592-5600.

Effect of Hexavalent Chromium on Performance of Membrane ...
Effect of Hexavalent Chromium on Performance of Membrane ...

The presence of toxic hexavalent chromium poses a great challenge in biological wastewater treatment. In this study, the performance of a membrane bioreactor (MBR) for the treatment of synthetic domestic wastewater in the presence of chromium was investigated.

Wastewater containing Cr(VI) treatment using solar tubular ...
Wastewater containing Cr(VI) treatment using solar tubular ...

Wastewater contaminated with hexavalent chromium has an orange color and an acid pH. Reduction with sodium sulfite or metabisulfite is a conventional method of treating hexavalent chromium in wastewater.

Removal of hexavalent chromium from wastewater by acid ...
Removal of hexavalent chromium from wastewater by acid ...

This paper deals with the ,treatment, of ,hexavalent chromium, (Cr(VI)) and its removal mechanism using ,acid,-washed zero-valent aluminum (ZVAl). The ,acid,-washed ZVAl before and after reaction was characterized by scanning electron microscope, X-ray diffraction, and X-ray photoelectron spectroscopy. The influence factors such as ZVAl loading, ,acid, washing time, and pH values on Cr(VI) removal were...

JP4008723B2 - Hexavalent chromium treatment method ...
JP4008723B2 - Hexavalent chromium treatment method ...

本発明に係る6価クロムを含む対象物とは、メッキ廃水や電解加工廃水等の溶液状態でも、焼却灰や土壌等の固形物状態でも良い。. The object ,containing hexavalent chromium, according to the present invention may be in a solution state such as plating ,wastewater, or electrolytic processing ,wastewater,, or in a solid state such as incineration ash or soil.

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