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Sulfurization of acid arsenic containing 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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Sulfurization of acid arsenic containing wastewater
Leather production processes - Wikipedia
Leather production processes - Wikipedia

Production management. The leather making process is in general restricted to batch processing, but if the surface coating sub-process is added then some continuous processing can be included. The operation flow has to follow the preparatory → tanning → crusting → surface coating sub-process order without deviation, but some of the sub-processes can be omitted to make certain leathers ...

Chemical Properties of Treated Textile Dyeing Wastewater
Chemical Properties of Treated Textile Dyeing Wastewater

The percentage of reduction of alkalinity was ranged between 10-22 % for the treated textile industrial ,wastewater, dyes with the different types of catalysts used in this study.

Textile dyeing and textile wastewater treatment ...
Textile dyeing and textile wastewater treatment ...

It is dependent on the covalent bond strength between the fiber and, dye, against alkaline and, acid, hydrolysis, and the efficient use of water to remove unreacted, dye, from the substrate. The degree by which, dyes, are fixed on to fiber and get discharged into the treatment bath after wash-off is referred to as, dye, …

Textile Wastewater Treatment: A Critical Review
Textile Wastewater Treatment: A Critical Review

discharge huge amounts of highly colored wastewater as the uptake of these dyes by fabrics is very poor. This highly colored textile wastewater severely affects photosynthetic function in plant but also has an adverse effect on aquatic life due to low light penetration and oxygen consumption. It may also be lethal

14 Industrial Wastewater Treatment Principals and Ideas
14 Industrial Wastewater Treatment Principals and Ideas

For example, the dye factory discharges both ,acidic wastewater, and alkaline ,wastewater,. Due to the difference in fabrics and dyes, the pollutants and pollution effects of textile printing and ,dyeing wastewater, will be very different. Even the ,wastewater, discharged from a set of production unit may contain several pollutants at the same time.

COAGULATION AND FLOCCULATION TREATMENT OF WASTEWATER …
COAGULATION AND FLOCCULATION TREATMENT OF WASTEWATER …

of ,wastewater, was adjusted from the initial pH of 12.99 to pH 4 due to chitosan was soluble in ,acidic, aqueous phases [5]. Moreover, Domard et al.[10] pointed out that there were 90 % of the functional group of NH 2 on chitosan surface has been protonated at pH 4. …

Poultry keratin based decolorants for dyeing wastewater ...
Poultry keratin based decolorants for dyeing wastewater ...

acidic dyeing wastewater,. In contrast, the results for MKA were completely different, with the optimum performance obtained in the neutral to alkaline range (pH from 6 to 12), indicating that MKA was suitable for treating neutral or alkaline ,wastewater,.

Textile dyeing and textile wastewater treatment
Textile dyeing and textile wastewater treatment

Since non-polar dyes are primarily used in supercritical CO2 ,dyeing, further development is required to enhance the ,dyeing, of natural fibers with ionic dyes such as acid dyes or reactive dyes because the affinity of natural textiles with dyes occurs by chemical (covalent bonds) interactions or fixed by physical (van der waals) forces.20-21 Kraan et al. (2003) reported four factors that ...

Study of Fenton Oxidation Process on Dyeing Wastewater and ...
Study of Fenton Oxidation Process on Dyeing Wastewater and ...

Synthetic, dyeing wastewater, . The composition and characteristics of synthetic, wastewater, is given in table 1. Four different, dyes, were used individually to prepare, wastewater, of each, dye., The dyes used were: Colocid Rhodamine B Conc, (acidic dye),, Colocid Yellow FG (reactive, dye),, Coralene Yellow C4G (disperse, dye), and Corafast Blue G (azo dye).

Urea - Wikipedia
Urea - Wikipedia

Urea,, also known as carbamide, is an organic compound with chemical formula CO(NH 2) 2.This amide has two –NH 2 groups joined by a carbonyl (C=O) functional group.. ,Urea, serves an important role in the metabolism of nitrogen-containing compounds by animals and is the main nitrogen-containing substance in the urine of mammals.It is a colorless, odorless solid, highly soluble in water, and ...

Removal of color from real dyeing wastewater by Electro ...
Removal of color from real dyeing wastewater by Electro ...

1/4/2008, · The textile ,dyeing, and finishing industry is a major industrial water consumer. The satisfactory treatment of the effluent from the ,dyeing, industry is difficult because of the effluent's strong color and high COD. Although several traditional approaches are known for the decomposition of the dye in ,wastewater,, some limitations still exist.

Textile dyeing industry an environmental hazard
Textile dyeing industry an environmental hazard

They may be are very toxic and may have a high impact on the, wastewater, quality. Natural dyestuffs require large quantities of, water, for, dyeing., (Almost equal to or double that of the fiber’s own weight).

Treatment of dyeing wastewater by combined sulfate radical ...
Treatment of dyeing wastewater by combined sulfate radical ...

1/1/2021, · Physicochemical characteristics of ,dyeing wastewater, are provided in Table 1. It can be observed from the table that dissolved solid concentration is 2104 mg/L. Higher dissolved solid concentration in the ,wastewater, is a favourable condition for electrochemical treatment of ,wastewater,.

CN102531226A - Method for treating acidic dye printing and ...
CN102531226A - Method for treating acidic dye printing and ...

The invention discloses a method for treating ,acidic, dye printing and ,dyeing wastewater,, which belongs to the field of ,wastewater, treatment. The method comprises the steps of (1) filtering collected ,acidic, printing and ,dyeing wastewater, through a screen, then enabling the ,acidic, printing and ,dyeing wastewater, to enter a regulation tank, and using alkali waste to regulate the pH value of the ...

Decolorization of Dyeing Wastewater Using Polymeric ...
Decolorization of Dyeing Wastewater Using Polymeric ...

29/2/2012, · The ,wastewater, produced by a reactive ,dyeing, contains [2,3]: (i) hydrolyzed reactive dyes not fixed on the substrate, representing 20-30% of the reactive dyes applied (on average 2 g/L) (this residual amount is responsible for the coloration of the effluents and cannot be recycled); (ii) ,dyeing, auxiliaries or organic substances, which are non-recyclable and responsible for the high BOD/COD of the effluents; …

Decolorization of dyeing wastewater and characterization ...
Decolorization of dyeing wastewater and characterization ...

The molecules of compounds in the ,dyeing wastewater, had a negative charge on their surfaces because of the sulfonic acid groups (Uddin et al. 2003). Thus, the higher the positive charge on the surface of coagulant molecules, the better the color removal efficiency.

Textile Dyes: Dyeing Process and Environmental Impact ...
Textile Dyes: Dyeing Process and Environmental Impact ...

Dyeing, is the aqueous application of color to the textile substrates, mainly using synthetic organic dyes and frequently at elevated temperatures and pressures in some of the steps [37,38]. It is important to point out that there is no dye which dyes all existing fibers and …

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