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Recovery of surfactant from 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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Recovery of surfactant from acid wastewater
Feasibility Studies on the Removal of Chromium (VI) from ...
Feasibility Studies on the Removal of Chromium (VI) from ...

Feasibility Studies on the Removal of ,Chromium, (VI) from Simulated ,Wastewater, Using Banana Sheath Fibers (BSF) S. Babitha Merlin*1, T ... Solutions with a pH less than 7 are said to be ,acidic, and solutions with a pH greater ... The appropriate amount of adsorbent was then added to the conical flasks ,containing, the simulated ,chromium, solution.

Determination of Cr(VI) in Water Wastewater and Solid ...
Determination of Cr(VI) in Water Wastewater and Solid ...

Chromium, exists almost exclusively in the Cr(III) oxidation state or in the Cr(VI) oxidation state. In the environment, Cr(III) is typically not a problem. The uncomplexed trivalent species is the chromic ion, Cr3+, and although it is soluble in ,acidic, solutions, it typically precipitates as the hydroxide in ,alkaline, …

Efficient chromium recovery from tannery sludge for ...
Efficient chromium recovery from tannery sludge for ...

Extraction in ,acidic, condition. The metal extraction carried out under ,acidic, condition using 4% (v/v) H 2 SO 4 solution showed Cr concentration of about 7843 mg/kg of sludge at pH 0.4. This comprises about 90% of total ,chromium, present in the sludge, similar results were also reported by Macchi et al. and Li et al. ().The decreased extraction yield of total ,chromium, was due to the metal ...

Hexavalent chromium - Wikipedia
Hexavalent chromium - Wikipedia

Adsorption of ,chromium,(VI) is found to be effective in the lower pH range and at higher temperatures and subsequent desorption is readily achieved upon ,alkaline, treatment of the adsorbent. Another study done by the American Industrial Hygiene Association indicates that the airborne ,hexavalent chromium, in ,acidic, mists of an electroplating tank collected on PVC filters was reduced over time ...

Factors controlling chromium release from chromate ...
Factors controlling chromium release from chromate ...

1/6/2009, · It is also evident from the Fig. 7 that the Cr concentration in ,alkaline, solutions tends to be higher than in ,acidic, solution both for JSO-1: JSO-2 and contaminated soils. [FIGURE 8 OMITTED] Hexavalent ,chromium, ([Cr.sup.6+]) reacts with numerous reducing agents commonly found in …

Efficient removal of hexavalent chromium from water by an ...
Efficient removal of hexavalent chromium from water by an ...

Chromium,-,containing, industrial ,wastewater, also contains other types of particles, such as Cu 2+, Zn 2+, Ni 2+, Cl −, CO 3 2− and SO 4 2−. Therefore, it is essential to investigate the competitive influence of these co-existing ions on Cr(vi) removal and the results are presented in Fig. 8.

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

Wastewater, from electroplating facilities and certain types of . 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 ...

Characteristics of Wastewater | Wastewater Management
Characteristics of Wastewater | Wastewater Management

The test for pH value of ,wastewater, is carried out to determine whether it- is ,acidic or alkaline, in nature. Fresh sewage is generally ,alkaline, in nature, (its pH value between 7.3 to 7.5). However, as the time passes, pH value tends to fall due to production of acids by bacterial action, and the sewage tends to become ,acidic,.

Efficient chromium recovery from tannery sludge for ...
Efficient chromium recovery from tannery sludge for ...

Extraction in ,acidic, condition. The metal extraction carried out under ,acidic, condition using 4% (v/v) H 2 SO 4 solution showed Cr concentration of about 7843 mg/kg of sludge at pH 0.4. This comprises about 90% of total ,chromium, present in the sludge, similar results were also reported by Macchi et al. and Li et al. ().The decreased extraction yield of total ,chromium, was due to the metal ...

Kinetic modeling of chromium(III) extraction with aliquat ...
Kinetic modeling of chromium(III) extraction with aliquat ...

Solvent extraction of ,chromium,(III) from ,alkaline, protein hydrolyzate, Sep. Purif. Technol. 81, 237–242. 46. WIONCZYK B., CIERPISZEWSKI R., MOL A., PROCHASKA K., 2011c, Studies on the kinetics and equilibrium of the solvent extraction of ,chromium,(III) from ,alkaline, aqueous solutions of different composition in the system with Aliquat 336, J ...

Highly efficient oxidation of chromium (III) with hydrogen ...
Highly efficient oxidation of chromium (III) with hydrogen ...

The results in Figure 2 show that the Cr 3+ could be oxidized to CrO 4 2− effectively in an ,alkaline, medium and the dosage of H 2 O 2 had a significant effect on the oxidation of Cr 3+.The oxidation efficiency was linearly increasing with the increase of VR. The ,chromium, in the solution was Cr 3+ in the original solution and the solution was dark green in color.

Efficient removal of hexavalent chromium from water by an ...
Efficient removal of hexavalent chromium from water by an ...

Chromium,-,containing, industrial ,wastewater, also contains other types of particles, such as Cu 2+, Zn 2+, Ni 2+, Cl −, CO 3 2− and SO 4 2−. Therefore, it is essential to investigate the competitive influence of these co-existing ions on Cr(vi) removal and the results are presented in Fig. 8.

Review of Chromium Residue and Chromium-containing Waste ...
Review of Chromium Residue and Chromium-containing Waste ...

Cr-,containing Wastewater, Treatment In leather processing, ,chromium, ore acquisition, electroplating, alloy, textile and etc, ,chromium,-contained ,waste water, will produce. The general processing way is that when the pH = 2.0, use reductant to change Cr (VI) into Cr (III), and then add the lime; in ,alkaline, conditions (pH = 9-10), make Cr (III ...

(PDF) Photocatalytic treatment of industrial wastewater ...
(PDF) Photocatalytic treatment of industrial wastewater ...

Photocatalytic treatment of industrial ,wastewater containing chromium, as a model pollutant-effect ... and indicate that the reduction rates increase with ,acidic or alkaline, pH. 26 Maximum pH change was found to occur during the ... which is expected as the reduction of ,chromium, is favoured at ,acidic, pH. The deposition of reduced ,chromium, ...

Feasibility Studies on the Removal of Chromium (VI) from ...
Feasibility Studies on the Removal of Chromium (VI) from ...

Feasibility Studies on the Removal of ,Chromium, (VI) from Simulated ,Wastewater, Using Banana Sheath Fibers (BSF) S. Babitha Merlin*1, T ... Solutions with a pH less than 7 are said to be ,acidic, and solutions with a pH greater ... The appropriate amount of adsorbent was then added to the conical flasks ,containing, the simulated ,chromium, solution.

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