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Removal of acid wastewater by cooling crystallization

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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Removal of acid wastewater by cooling crystallization
The decolorization and mineralization of Acid Orange 6 azo ...
The decolorization and mineralization of Acid Orange 6 azo ...

The decolorization and mineralization of ,Acid, Orange 6 ,azo dye, in aqueous solution by advanced oxidation processes: ... ,treatment, for years. Because of its ,strong, oxidative ability, ozone can degrade organic pollutants [2] ... been attracting much attention, can improve the efficiency of ozonation in water or ,wastewater treatment,.

Frontiers | Degradation of Azo Dye (Acid Orange 7) in a ...
Frontiers | Degradation of Azo Dye (Acid Orange 7) in a ...

More than 80% of ,wastewater, from industries is discharged into receiving water bodies without any pollution control. Microbial fuel cells (MFCs) are a promising technology for the simultaneous ,treatment, of ,wastewater, and electricity production. With regard to ,azo,-,dye, containing ,wastewater, (e.g., from textile manufacturing), the ,dye, may be fed via the anode chamber containing electrochemically ...

(PDF) Barium Carbonate Process for Sulphate and Metal ...
(PDF) Barium Carbonate Process for Sulphate and Metal ...

BaCO3 can only be used for removal of sulphate that is associated with calcium, as calcium is needed to remove the added carbonate associated with the barium cation. Sulphate removal was only ...

Synergetic treatment of dye contaminated wastewater using ...
Synergetic treatment of dye contaminated wastewater using ...

Synthetic dyes contained in textile ,wastewater,, such as ,azo, dyes, pose a great threat to the global aqueous environments and even damage the aquatic life. 1 ,Azo, dyes are generally considered hard to degrade, because of the stable aromatic structures with nitrogen–nitrogen double bonds. 2 Many efforts have been made to exploit feasible solutions to mitigate their negative impacts, such as ...

Microorganism-Based Treatment of Azo Dyes
Microorganism-Based Treatment of Azo Dyes

Textile ,dye wastewater, remediation is based not only in colour removal (decolorization), but also in the degradation and mineralization of the ,dye, molecules (Chang et al., 2001). Indeed, decolorization occurs when the molecules are removed from the solution or when the chromophore bond is broken, but the molecule in the first case and the major fragments in the second, remain intact.

ADVANCED OXIDATION OF AN AZO DYE AND ITS SYNTHESIS ...
ADVANCED OXIDATION OF AN AZO DYE AND ITS SYNTHESIS ...

The objective was to study the degradation of ,azo dye, C.I. ,Acid, Orange 7 (AO7) and intermediates for its synthesis sulphanilic ,acid, (SA) and 2-naphthol (2-N) by Fenton process. Full factorial design and response surface methodology were applied to model the system behavior influenced by studied process parameters ([Fe2+] and [H 2O2]).

Effective Ways of Desulphurization of Acid Mine Drainage
Effective Ways of Desulphurization of Acid Mine Drainage

from ,mine, water. The Ba salts commonly used for sulphates removal are BaCO3, Ba(OH)2 and BaS. Chemical treatment of ,mine, water using Ba salts has proved to be capable of removing sulphates to less than 250 ppm [,3,]. Baryte (BaSO) is highly insoluble making it 4 an excellent candidate as removal phase for sul-phate treatment.

Assessment of Impacts of Acid Mine Drainage on Surface ...
Assessment of Impacts of Acid Mine Drainage on Surface ...

16/3/2016, · The process managed to remove total dissolved solids from 2600 to 360 mg/L. Metals were precipitated with CaS, Ca(HS) 2, or Ca(OH) 2 while SO 4 2− was reduced to 100 mg/L in a two‐step process that employed gypsum crystallization followed by ,BaCO 3, treatment.

DYE WASTEWATER TREATMENT: REMOVAL OF REACTIVE DYES …
DYE WASTEWATER TREATMENT: REMOVAL OF REACTIVE DYES …

Klimiuk et al. (1999) have reported study on use of PAC in the case of reactive dyes and also found ,strong, dependence on ,dye, type and coagulant dose. Joo et al. (2007) found that very high dosage of inorganic coagulant and polymeric coagulant are required for reactive ,dye wastewater treatment,. The mechanism of the ,dye, removal is largely abstract.

Wastewater treatment using plant-derived bioflocculants ...
Wastewater treatment using plant-derived bioflocculants ...

Two effluents were examined containing: (1) direct ,azo dye, and salts, and (2) dyeing auxiliary chemicals. The tannin coagulant was found to be efficient for color removal in both synthetic and natural textile effluents, eliminating all dyes completely over a pH range of 4–9. pH had a greater effect on the efficiency of iron (III) sulfate.

Acid mine drainage remediation strategies: A review on ...
Acid mine drainage remediation strategies: A review on ...

Castillo, J., Gomez-Arias, A., Posthumus, J., and Welman-Purchase, M., 2015, “Geochemical Study of the Interaction of Acid and Alkaline ,Mine, Drainage with ,BaCO 3,,” 10th International Conference on Acid Rock Drainage & IMWA Annual Conference.

Adsorption of azo dyes on polymer materials
Adsorption of azo dyes on polymer materials

tant aspect of ,wastewater treatment, before discharge into environment. In this review, the use of polymer materials, both synthetic and natural by origin, for removal of ,azo, dyes from aqueous solutions is presented. Polymeric adsor-bents show increasing advantages over conventional adsorbents because of their simple processing, rela-

Exploring sulfate and metals removal from Andean acid mine ...
Exploring sulfate and metals removal from Andean acid mine ...

The BaCO 3-DAS columns achieved values under 500 mg/L of, sulfate, at the output of the system for up to 6 months (initial, sulfate, concentration ranged 1234–2468 mg/L). Upscaling calculations of the present results support the feasibility of using this technology at a full field scale, especially as a, wastewater, treatment for abandoned, mine, sites, although some strategies to reduce witherite costs are …

Exploring sulfate and metals removal from Andean acid mine ...
Exploring sulfate and metals removal from Andean acid mine ...

20/11/2020, · To get a better understanding of the ,BaCO 3,-DAS technology response when submitted to higher sulfate loads, the ,BaCO 3,-DAS columns of the present study were designed to received 1.9 and 13.,3, g/day of SO 4 2− (i.e., 2.7 and 19 times more sulfate than the experiment by Torres et al., 2018).

Effect of Process Parameters on the Electro coagulation of ...
Effect of Process Parameters on the Electro coagulation of ...

Abstract: Textile industries release large volumes of ,dye wastewater, that contain different dyes. ,Azo, dyes contain ,strong, N=N bond which are not easily broken by conventional methods. The discharge of this type of ,wastewater, to natural watercourse can pose serious environmental impacts to aquatic life and man.A study was carried out to ...

Treatment of Dye Effluent by Electrochemical and ...
Treatment of Dye Effluent by Electrochemical and ...

Textile ,dye wastewater, is well known to contain ,strong, colour, high pH, temperature, Chemical Oxygen Demand (COD) and biodegradable materials. The electrochemical ,treatment, of ,wastewater, is considered as one of the advanced oxidation processes, potentially a powerful method of pollution control, offering high removal efficiencies the removal of colour of methyl red ,azo dye, is a challenge in ...

Wastewater treatment using plant-derived bioflocculants ...
Wastewater treatment using plant-derived bioflocculants ...

Two effluents were examined containing: (1) direct ,azo dye, and salts, and (2) dyeing auxiliary chemicals. The tannin coagulant was found to be efficient for color removal in both synthetic and natural textile effluents, eliminating all dyes completely over a pH range of 4–9. pH had a greater effect on the efficiency of iron (III) sulfate.

Effective Removal of Acid Black 1 Dye in Textile Effluent ...
Effective Removal of Acid Black 1 Dye in Textile Effluent ...

Nadu State in India. The effluent from the ,dye, bath mainly contains ,Acid, Black 1 ,dye, and the characteristics are presented in Table 1. ,Acid, black 1 ,dye, is the anionic ,azo dye, having a molecular weight of 616.49g/mol [13]. The molecular structure of ,Acid, black 1 ,dye, is shown in Fig. 1 [14] and the physiochemical properties of ,Acid

(PDF) Geochemical Study of the Interaction of Acid and ...
(PDF) Geochemical Study of the Interaction of Acid and ...

In this study the geochemical behaviour of ,BaCO 3, was investigated and the optimization of its use in acid (pH 2.93) and alkaline (pH 8.2) ,mine, drainage (AMD) with high concentrations of sulfate (1250-1400 mg/L) and moderate to low metal

Indirect Electrochemical Oxidation of Dye Wastewater ...
Indirect Electrochemical Oxidation of Dye Wastewater ...

in ,dye wastewater treatment,. The pH of the solution had a significant effect on the existing form of ... the aromatic ,azo, dyes comprise about two-thirds of the total [2]. Because of their ... efficiently by the ,strong, oxidant of hypochlorous ,acid, formed during electrolysis.

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