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Pyrite acid wastewater

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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Pyrite acid wastewater
Treatment of high-concentration chromium-containing ...
Treatment of high-concentration chromium-containing ...

Research on treatment of chromium-containing wastewater has been conducted for years (Cheung & Gu 2007; Li & Shao 2015). The common treatment methods are, adsorption,,, electrolytic reduction,, and chemical and biological methods ( Song et al. 1998 ; Owlad et al. 2009 ; Bhattacharya et al. 2019 ).

The study of the high-salt chromium-containing wastewater ...
The study of the high-salt chromium-containing wastewater ...

The study of the high-salt ,chromium,-,containing wastewater, treatment by the photocatalysis-constructed wetland combination ,method, January 2020 Water Science & Technology 80(25)

Biodegradation of polymers
Biodegradation of polymers

polyacrylic ,acid,. Among the vinyl polymers produced industrially, ,PVA, is the only one known to be mineralized by microorganisms. ,PVA, is water-soluble and biodegradable and hence, used to make water-soluble and biodegradable carriers, which may be useful in the manufacture of delivery systems for chemicals such as fertilizers, pesticides and

CHROMIUM REMOVAL FROM TANNERY WASTEWATER …
CHROMIUM REMOVAL FROM TANNERY WASTEWATER …

chromium, removal efficiency was examined investigating various parameters: applied voltage, time, and current density. In thebatch experiment, 500 mL ,chromium,-,containing wastewater, was used for electrocoagulation. ,Chromium, content in the raw ,wastewater, was 340.1 mg/L and after treatment at optimized conditions, ,chromium, content was 6.9 mg/L.

Bio-sorption for effective removal of chromium(VI) from ...
Bio-sorption for effective removal of chromium(VI) from ...

10/12/2020, · Various conventional and advanced ,treatment, methods have been employed for the removal of Cr ions from water and ,wastewater, in developed countries. These include chemical precipitation, ion exchange, reverse osmosis, membrane filtration, electrodialysis, polymeric nano particles and activated carbon adsorptions [ 8 , 9 , 10 , 11 , 12 , 13 ].

Synthesis and characterization of Cu(OH) 2 -NWs-PVA-AC ...
Synthesis and characterization of Cu(OH) 2 -NWs-PVA-AC ...

11/3/2021, · From these results, it can be also determined that Cu(OH) 2-NWs-,PVA,-AC composite can be deliberated as the promising adsorbent for the removal of MB from ,wastewater, 50,51,52,53,54,55,56.

AN INTEGRATED APPROACH TO ASSESS THE …
AN INTEGRATED APPROACH TO ASSESS THE …

wastewater, treatment system. The village wastewaters are collected by a mixed sewer system and discharged, without treatment, in a small creek, affluent to the Guadiana River, in the North of the Alqueva dam basin. The main activities in the drainage basin are agriculture, cattle breeding (mainly sheep breeding) and tanning.

CN103693773A - Chromium-containing waste water reuse ...
CN103693773A - Chromium-containing waste water reuse ...

The invention discloses a, chromium-containing waste water, reuse, treatment method,, which comprise the following steps: (1) filtering the, waste water, to be treated by a filter; (2) treating the...

CHROMIUM REMOVAL FROM TANNERY WASTEWATER …
CHROMIUM REMOVAL FROM TANNERY WASTEWATER …

chromium, removal efficiency was examined investigating various parameters: applied voltage, time, and current density. In thebatch experiment, 500 mL ,chromium,-,containing wastewater, was used for electrocoagulation. ,Chromium, content in the raw ,wastewater, was 340.1 mg/L and after ,treatment, at optimized conditions, ,chromium, content was 6.9 mg/L.

Multifunctional application of PVA-aided Zn–Fe–Mn coupled ...
Multifunctional application of PVA-aided Zn–Fe–Mn coupled ...

2/1/2021, · Zinc oxide (ZnO) is a fascinating semiconductor material with many applications such as adsorption, photocatalysis, sensor, and antibacterial activities. By using a poly (vinyl alcohol) (,PVA,) polymer as a capping agent and metal oxides (iron and manganese) as a couple, the porous ,PVA,-aided Zn/Fe/Mn ternary oxide nanocomposite material (PTMO-NCM) was synthesized. The thermal, optical ...

(PDF) Removal Of Chromium From Electroplating Wastewater ...
(PDF) Removal Of Chromium From Electroplating Wastewater ...

The water remaining after separation of the precipitate contains less than 50 mg/lit chromium which is close to some reported results [10] The, wastewater, was treated with the limewater suspension at various ratios of CaO, Removal, Of Chromium From Electro-Plating, Wastewater, By Simple Chemical Treatment And Ion Exchange suspension to the, wastewater, ratios to reach the optimum amount of the lime necessary for the best, removal, …

An alternative treatment method for fluorosurfactant ...
An alternative treatment method for fluorosurfactant ...

15/9/2016, · Especially, ion exchange, methods are often used for treating fluorosurfactant-containing industrial wastewater. But the negative chromium species and sulphate present in high amounts compete for exchange sites and thereby lower the sorption capacity (Deng et al., 2010).

Study of PVA-based nanocomposite polymer gels containing ...
Study of PVA-based nanocomposite polymer gels containing ...

Maximum room-temperature conductivities of 2·12 × 10 −3, 7·3 × 10 −4 and 5·8 × 10 −4 S/cm have been obtained for nanocomposite gel electrolytes containing DMSO + 1 M OA, MA and SA + 10 wt% ,PVA, at 6 wt% silica, respectively.

Fouling Resistant CA/PVA/TiO2 Imprinted Membranes for ...
Fouling Resistant CA/PVA/TiO2 Imprinted Membranes for ...

CA/,PVA,/TiO2ImprintedMembranes forSelectiveRecognitionand ... .3389/fchem.2017.00002 Fouling Resistant CA/,PVA,/TiO2 Imprinted Membranes for Selective Recognition and Separation Salicylic ,Acid, from ,Waste Water,. XiaopengYu. 1,2 *,XueyangMi. 1,2,ZhihuiHe. 3,MinjiaMeng. 3 ... SA-contained ,wastewater, is difficult to be disposed by the general sewage ...

Oxidative Mineralization and Characterization Polyvinyl ...
Oxidative Mineralization and Characterization Polyvinyl ...

Polyvinyl alcohol, (,PVA,) is a synthetic polymer produced by alkali or acidic hydrolysis of polyvinyl acetate. Molecular weight (7,000- 186,000) and percent hydrolysis govern the physical properties of ,PVA, such as solubility in hot water. ,PVA, produced from the hydrolysis of polyvinyl acetate, with 88-98 %I hydrolysis, dissolvcs most rapidly in hot

Freeze Desalination as Point of Use Water Treatment ...
Freeze Desalination as Point of Use Water Treatment ...

varying in their treatment capabilities and costs [9]. Considerable efforts, therefore, have been made to treat mostly Cr(VI) ,containing, water/ ,wastewater,. Widely employed methods for Cr(VI) removal include chemical precipitation (primarily by reducing Cr(VI) to Cr(III)), ion exchange, membrane, and adsorption processes [10]. Moreover, it is

Removal of Chromium from Industrial Wastewater by ...
Removal of Chromium from Industrial Wastewater by ...

Addis Ababa, at discharge ,point,. The chrome tanning liquor had pH of 3.85 and 1220.2 mg/l ,chromium, concentration which was measured before application with adsorbent. In order to study the efficiency of the activated coffee husk carbon for the actual sample, the effluent was digested with concentrated Nitric ,acid, and then filtered through

Function Synergy of Cross-Linked Cationic PVA Polymer to ...
Function Synergy of Cross-Linked Cationic PVA Polymer to ...

Thus, a cationic ,polyvinyl alcohol, (,PVA,) polymer, modified by glyoxal and boric ,acid,, was discovered due to its excellence in associating with the FLA A additive for controlling the free cement-based material water amount and preventing the chelating effect of FLA …

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

25/11/2017, · A similar type of work has been reported in which synthetic 100 mg/L Cr(VI) ,containing wastewater, as catholyte and anaerobic microorganisms as anodic biocatalyst . The maximum power density of 150 mW/m 2 and the maximum open circuit voltage of 0.91 V were generated with Cr(VI) as the electron acceptor.

Reactive toughening of polyvinyl alcohol hydrogel and its ...
Reactive toughening of polyvinyl alcohol hydrogel and its ...

In order to improve the hydraulic impact resistance of a ,polyvinyl alcohol, (,PVA,) hydrogel as a microorganism immobilization material and meet the requirements of long-time aeration of sewage treatment, toughened ,PVA, hydrogel beads were prepared by co-crosslinking with glycerol through the boric ,acid, (H3BO3) – chemical crosslinking method. It was found that glycerol could increase the ...

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