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How to adjust pH when industrial wastewater is acidic

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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How to adjust pH when industrial wastewater is acidic
Preparation and application of modified zeolites as ...
Preparation and application of modified zeolites as ...

Waghmare et al. carried out a study for ,fluoride, sorption, found that zeolite modified by ,salt, solution of aluminum chloride and calcium chloride 2:1 showed the maximum adsorption capacity of 18.6 mg/g; the optimization contact time for adsorbents is about 200 min. Currently, the studies on removal of pollutants by ,salt, modified zeolite are extensive, and the partial adsorption capacity of ...

Preparation and application of modified zeolites as ...
Preparation and application of modified zeolites as ...

Waghmare et al. carried out a study for ,fluoride, sorption, found that zeolite modified by ,salt, solution of aluminum chloride and calcium chloride 2:1 showed the maximum adsorption capacity of 18.6 mg/g; the optimization contact time for adsorbents is about 200 min. Currently, the studies on removal of pollutants by ,salt, modified zeolite are extensive, and the partial adsorption capacity of ...

Preparation and characterisation of tamarind 4 ...
Preparation and characterisation of tamarind 4 ...

Step B: ,Preparation, of tamarind 4-hydroxybenzoic ,acid, (THBA) resin Epoxypropyl ether of tamarind, synthesized in Step A, was allowed to react with 13.8 g (0.1 mol) of 4-hydroxybenzoic ,acid,; the mixture was stirred for 5 h at 60°C and left overnight. The product was …

Central Pollution Control Board - CPCB ENVIS
Central Pollution Control Board - CPCB ENVIS

phosphatic fertiliser plants are sulphur dioxide from the captive sulphuric ,acid, plants and ,fluoride, and particulate matter from the processing units (phosphate rock grinding, granulation & bagging sections). The scrubbing liquid for control of gaseous emission results in the generation of ,wastewater,.

A fluoride-selective electrode (Fse) for the ...
A fluoride-selective electrode (Fse) for the ...

The response of the LaF 3 electrode to the concentration ,of fluoride, ions was reported several times to start at 10 −6 mol L −1 upwards. 1,33 The ISE was applied in the past for ,fluoride, determinations in water, ,wastewater,, pure salts after pre-concentration, electroplating baths, milk, minerals and rocks, plants, phosphoric ,acid, topaz, bones, urine, aliphatic amine solutions, dental tissues, samples ,containing, …

Preparation and application of modified zeolites as ...
Preparation and application of modified zeolites as ...

Waghmare et al. carried out a study for ,fluoride, sorption, found that zeolite modified by ,salt, solution of aluminum chloride and calcium chloride 2:1 showed the maximum adsorption capacity of 18.6 mg/g; the optimization contact time for adsorbents is about 200 min. Currently, the studies on removal of pollutants by ,salt, modified zeolite are extensive, and the partial adsorption capacity of ...

PROCESSES FOR THE RECOVERY OF FLUORIDE AND SILICA …
PROCESSES FOR THE RECOVERY OF FLUORIDE AND SILICA …

In alternative embodiments, the invention provides methods comprising a continuous ion exchange system which removes the ,fluoride, (F) and phosphoric ,acid, (P 2 O 5) from the ,wastewater, and industrial pond systems, e.g., as the exemplary process illustrated in FIG. 1, in which ,wastewater, from a gypsum/cooling pond system (1), is fed to a Pretreatment System where the water is clarified to allow …

Preparation and characterisation of tamarind 4 ...
Preparation and characterisation of tamarind 4 ...

Step B: ,Preparation, of tamarind 4-hydroxybenzoic ,acid, (THBA) resin Epoxypropyl ether of tamarind, synthesized in Step A, was allowed to react with 13.8 g (0.1 mol) of 4-hydroxybenzoic ,acid,; the mixture was stirred for 5 h at 60°C and left overnight. The product was …

Design Manual: Removal of Fluoride from Drinking Water ...
Design Manual: Removal of Fluoride from Drinking Water ...

1.3 ,Fluoride, in Water Supplies ,Fluoride, occurs naturally in groundwater via weathering/leaching of rocks and soils ,containing fluoride,- bearing minerals such as fluorspar (CaF2), cryolite (NasALFe) and fluorapatite (3Ca3[PO4]2'Ca[F,Cl]2) (Mackay and Mackay, 1989; Cotton and Wilkinson, 1988).

Fluoride - GreenFacts - Facts on Health and the Environment
Fluoride - GreenFacts - Facts on Health and the Environment

In addition to the actual consumption of often large amounts of drinking-water ,containing, naturally occurring elevated levels ,of fluoride,, the indoor burning of coal rich in ,fluoride,, the ,preparation, of foodstuffs in water ,containing, increased ,fluoride, levels and the consumption of specific foodstuffs naturally rich in ,fluoride,, such as tea, are believed to contribute to the elevated intake ,of fluoride,, with …

Central Pollution Control Board - CPCB ENVIS
Central Pollution Control Board - CPCB ENVIS

phosphatic fertiliser plants are sulphur dioxide from the captive sulphuric ,acid, plants and ,fluoride, and particulate matter from the processing units (phosphate rock grinding, granulation & bagging sections). The scrubbing liquid for control of gaseous emission results in the generation of ,wastewater,.

Preparation and Characteristics of Polyaluminium Chloride ...
Preparation and Characteristics of Polyaluminium Chloride ...

However, plenty of byproducts of fluorine-,containing, waste HCl at the concentration of about 10%~12% could not be utilized comprehensively and are even hazardous to the environment. This work proposed a new two-step technology to prepare inorganic polymer flocculants polyaluminium chloride (PAC) from synthetic cryolite mother liquor.

Preparation and Characteristics of Polyaluminium Chloride ...
Preparation and Characteristics of Polyaluminium Chloride ...

However, plenty of byproducts of fluorine-,containing, waste HCl at the concentration of about 10%~12% could not be utilized comprehensively and are even hazardous to the environment. This work proposed a new two-step technology to prepare inorganic polymer flocculants polyaluminium chloride (PAC) from synthetic cryolite mother liquor.

Removal of fluoride using quaternized palm kernel shell as ...
Removal of fluoride using quaternized palm kernel shell as ...

Fluoride,, a ,salt, of the element fluorine, occurs primarily as sellaite (MgF 2), fluorspar (CaF 2), cryolite (Na 3 AlF 6), and fluorapatite [3Ca 3 (PO 4) 2 Ca(F,Cl 2)]. It is an essential constituent for both humans and animals, depending on the total amount ingested or its concentration in drinking water.

Standard Operating Procedure and Checklist of Minimal ...
Standard Operating Procedure and Checklist of Minimal ...

resulting into precipitation of the Sodium SilicoFluoride ,salt,, which is centrifuged and washed for recovery of Sodium silico ,fluoride, precipitate from mother liquor. The mother liquor is neutralized with either Sodium hydroxide or calcium hydroxide. The centrifuged …

Fluoride: 9. Does water fluoridation pose risks?
Fluoride: 9. Does water fluoridation pose risks?

The consumption of drinking water ,containing, naturally elevated levels ,of fluoride,, the indoor burning of coal rich in ,fluoride,, the ,preparation, of foodstuffs in water ,containing, high ,fluoride, levels and the consumption of specific foodstuffs naturally rich in ,fluoride,, such as tea, all contribute to the elevated intake ,of fluoride,, with the resultant development of dental fluorosis.

Removal of fluoride using quaternized palm kernel shell as ...
Removal of fluoride using quaternized palm kernel shell as ...

Fluoride,, a ,salt, of the element fluorine, occurs primarily as sellaite (MgF 2), fluorspar (CaF 2), cryolite (Na 3 AlF 6), and fluorapatite [3Ca 3 (PO 4) 2 Ca(F,Cl 2)]. It is an essential constituent for both humans and animals, depending on the total amount ingested or its concentration in drinking water.

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