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Neutralization of acid wastewater by hydrated lime

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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Neutralization of acid wastewater by hydrated lime
Photocatalytic degradation of Chromium (VI) from ...
Photocatalytic degradation of Chromium (VI) from ...

Photocatalysis of industrial ,wastewater, The tannery and dyeing ,wastewater containing, Cr(VI) ions were extracted by using diphenyl carbazide as masking agent forms reddish purple colour of the solution is form. The absorbance of aqueous solution was measured by using spectrophotometer (systronics, model-2203). It was found maximum at k max = 540 nm.

Highly efficient treatment of terephthalic acid wastewater ...
Highly efficient treatment of terephthalic acid wastewater ...

phase was a mixture of 0.3% acetic ,acid, and acetonitrile (90:10, v/v) at a flow rate of 1 mL/min. Validation of the HPLC methods included linearity (R2 = 0.999), ,recovery, (97%~105%, ,RSD, < 2%), precision (,RSD, < 2%), and detec-tion limit (0.3 mg/L). An eight-point calibration curve was prepared with the reference substance TA at concentrations

METHOD OF TREATING STRONGLY ACID WASTEWATER CONTAINING ...
METHOD OF TREATING STRONGLY ACID WASTEWATER CONTAINING ...

The method of treating strongly ,acid wastewater containing, toxic substances of the present invention is suitable for the removal of fluorine, boron, copper, lead, arsenic, cadmium, hexavalent ,chromium,, manganese, selenium, etc. from strongly ,acid wastewater, discharged from glass factories, liquid-crystal factories, plating factories, semiconductor factories, iron-mining factories, nonferrous ...

Study on Treatment of Cr (VI)-Containing Wastewater with ...
Study on Treatment of Cr (VI)-Containing Wastewater with ...

After activated carbon is oxidized and modified with nitric ,acid, (1:1), its cation exchange capacity can amount to 1.840 mmol • g-1. The modified activated carbon is used as adsorbent for the treatment of Cr (Ⅵ)-,containing wastewater, at room temperature, and its removal mechanism is discussed in this paper. It is shown that: when the pH value of the aqueous solution being 2.5-3.0;the ...

Highly efficient treatment of terephthalic acid wastewater ...
Highly efficient treatment of terephthalic acid wastewater ...

phase was a mixture of 0.3% acetic ,acid, and acetonitrile (90:10, v/v) at a flow rate of 1 mL/min. Validation of the HPLC methods included linearity (R2 = 0.999), ,recovery, (97%~105%, ,RSD, < 2%), precision (,RSD, < 2%), and detec-tion limit (0.3 mg/L). An eight-point calibration curve was prepared with the reference substance TA at concentrations

Methods for removal of chromium - SlideShare
Methods for removal of chromium - SlideShare

Generally membranes made up of polyamide are used for the treatment of ,chromium containing, effluent. The reverse osmosis technique has been successfully used in the treatment of electroplating rinse waters, not only to meet effluent discharge standards, but also to recover concentrated metal salt solutions for reuse. Its main demerits are high priced equipment and/or expensive monitoring ...

Analysis of radium-226 in high salinity wastewater from ...
Analysis of radium-226 in high salinity wastewater from ...

3/3/2015, · Radium separation is accomplished using a combination of a strong-,acid, cation exchange resin to separate barium and radium from other ions in the solution and a strontium-specific resin to isolate radium from barium and obtain a sample suitable for analysis by ICP-MS. Method optimization achieved high radium ,recovery, (101 ± 6% for standard mode and 97 ± 7% for collision mode) for synthetic Marcellus Shale ,wastewater, …

(PDF) Characterization and recovery of tartaric acid from ...
(PDF) Characterization and recovery of tartaric acid from ...

The main aim of this study was to maximize tartaric ,acid recovery,, ... stalks, and sludge generated from ,wastewater, ... than 1% ,RSD, and 3% ,RSD,, respectively. The practical ...

(PDF) Characterization and recovery of tartaric acid from ...
(PDF) Characterization and recovery of tartaric acid from ...

The main aim of this study was to maximize tartaric ,acid recovery,, ... stalks, and sludge generated from ,wastewater, ... than 1% ,RSD, and 3% ,RSD,, respectively. The practical ...

Determination of Volatile Fatty Acids in Environmental ...
Determination of Volatile Fatty Acids in Environmental ...

The range of volatile fatty ,acid, concentrations in ,wastewater, and water. Sample ... (,RSD,) while ac- ... cate that the absolute ,recovery, of acetic ,acid, in the range from 11 to 1156 mg/l was quite poor; only 53%-58% of nominal concentration was found in a distillate.

PROCESS FOR RECYCLING CHROMIUM FROM WASTE WATER CONTAINING ...
PROCESS FOR RECYCLING CHROMIUM FROM WASTE WATER CONTAINING ...

A process for recovering ,chromium, from hexavalent ,chromium,-,containing wastewater, comprises the following steps: (1) extracting hexavalent ,chromium, in ,wastewater, to an organic phase by using an extracting agent, and separating hexavalent ,chromium, from a water phase, so as to acquire a hexavalent ,chromium,-loaded organic phase; (2) reducing the hexavalent ,chromium,-loaded organic …

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

ICMIEE18-287 Efficiency of Tamarindusindica Seed Charcoal ...
ICMIEE18-287 Efficiency of Tamarindusindica Seed Charcoal ...

The ,chromium,-,containing wastewater, water was collected from the SUPEREX LEATHER Ltd. Khulna Bangladesh. Just after the chrome tanning operation, chrome-tanningwastewater was collected in high-densitypolyethylene (HDP)container, which was washed with diluted nitric ,acid, and instantly deported to the laboratory for

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

chromium, forms [6]; however, concerns regarding the presence of ,Chromium, in the environment focus on the potential adverse health effects of Cr (VI)-contaminated soils, groundwater, and drinking water supplies. Hexavalent ,chromium, is more hazardous, carcinogenic, and mutagenic and the most water soluble which easily enters to living cells [7].

Sustainable Recovery of High Added-Value Vanilla Compounds ...
Sustainable Recovery of High Added-Value Vanilla Compounds ...

Tables S1 and S2: extraction efficiencies, average results (%) ± standard relative deviations (RSDs, %) of vanillin and vanillic ,acid, aqueous solutions using several extraction solvents (EA, BioSs, and HESs) as function of stirring time, solvent:feed volume relation ratio, and initial analyte concentration (10, 50, 100, or 500 mg/L) at room temperature (298.15 K); and Figures S1 and S2: HPLC chromatogram profiles of vanillin and vanillic ,acid, …

TREATING INDUSTRIAL WASTEWATER – Flexi Systems
TREATING INDUSTRIAL WASTEWATER – Flexi Systems

Our Chromic ,Acid, Purification System can purify aged chromic ,acid, and achieve 90% removal rate by using a unique type of resin in the ion exchange process. The purified chromic ,acid, can be reused again for production processes if required. Note however that System is not suitable for chromic ,acid, coarsening process.

Journal of Analytical Bioanalytical and Separation Techniques
Journal of Analytical Bioanalytical and Separation Techniques

Parameter ,Recovery, % ,RSD, % LOD µg/ml LOQ µg/ml Mefenamic ,Acid, 99.78 1.49 0.04 0.06 The assay results obtained by using the proposed meth - od for the analysis of developed Tablet formulation containing Mefenamic ,Acid,. ,Acid, in different ,Wastewater, (n = 3) Indicating that method is robust i.e. it is reliable during normal use. All

Wastewater Treatment during PCB Fabrication Process | PSPCB
Wastewater Treatment during PCB Fabrication Process | PSPCB

This process produces copper-,containing wastewater,, sulfuric ,acid, mist. (10) Soldermask (Green): Its function is to prevent bridging during wave soldering, improve soldering quality and save solder. It is also a permanent protective layer for printed boards that protects against moisture, corrosion, mildew and mechanical abrasion.

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