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Chemical neutralization of 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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Chemical neutralization of acid wastewater
Detection Control and Correction of Hydrogen Sulfide ...
Detection Control and Correction of Hydrogen Sulfide ...

----- The rate of flux of hydrogen ,sulfide, to the sewer pipe wall can be calculated by the following ,equation,: 0^ = 0.45(sv)3/8j[DS]b/p' where: 0m = rate of flux of hydrogen ,sulfide, to the sewer wall, in g/m2-hr 0.45 = conversion factor from meters to feet s = energy grade line slope of the stream v = stream velocity, in ft/sec j = factor relating the fraction of dissolved ,sulfide, present as H2S to pH (see Figure 4-8) [DS] = dissolved ,sulfide, …

(PDF) Separate recovery of copper and zinc from acid mine ...
(PDF) Separate recovery of copper and zinc from acid mine ...

There are three possible reasons for that observation; low pH, high N 2 gas flow and low amount of ,sulfide, transport from ,sulfide,-bottle.H 2 S → HS − + H + (K a1 = 10 −7 )(8)HS − → S 2− + H + (K a2 = 10 −13 )(9)Total ,sulfide, = [S −2 ] 1 + [H + ] K a2 + [H + ] 2 K a1 K a2(10)During the experiments the pH in the metal mixture-bottle decreased from 1.9 to 1.8-1.5 (depending on initial cu concentration) due to ,acid, …

Technology to detoxify cyanogen|Technology for waste water ...
Technology to detoxify cyanogen|Technology for waste water ...

Thermal hydrolysis method is suitable for treatment of wastwater containning high concentration of cyanogen/cyanide(2,000 ~50,000 mg/L).When cyanogen/cyanide containing ,wastewater, is kept at high temperaturs(170~260℃)in autoclave, hydrolisis occurs as ,Equation, (1) or (2),and cyanogen decomposes to ammonia and formic ,acid,.

(PDF) Separate recovery of copper and zinc from acid mine ...
(PDF) Separate recovery of copper and zinc from acid mine ...

There are three possible reasons for that observation; low pH, high N 2 gas flow and low amount of ,sulfide, transport from ,sulfide,-bottle.H 2 S → HS − + H + (K a1 = 10 −7 )(8)HS − → S 2− + H + (K a2 = 10 −13 )(9)Total ,sulfide, = [S −2 ] 1 + [H + ] K a2 + [H + ] 2 K a1 K a2(10)During the experiments the pH in the metal mixture-bottle decreased from 1.9 to 1.8-1.5 (depending on initial cu concentration) due to ,acid, …

Facile and Novel Chemical Synthesis Characterization and ...
Facile and Novel Chemical Synthesis Characterization and ...

This paper reports the successful synthesis of various ,copper sulfide, nanostructures via coprecipitation and hydrothermal routes using new starting reagents such as Na2SO3 as a reducing agent for converting Cu2+ to Cu+ and PMP dye–Cu(II) and carminic ,acid,–Cu(II) complexes as new ,copper, precursors for synthesizing quantum dots in aqueous medium.

Minerals | Free Full-Text | Recovery of Metals from Waste ...
Minerals | Free Full-Text | Recovery of Metals from Waste ...

The hydrogen ,sulfide, gas that is produced is then used to precipitate metals as low solubility metal sulfides (,Equation, (2)) . 2CH 2 O + SO 4 2− → H 2 S + 2HCO 3 − (1)

(PDF) 2010 A review of metal sulphide precipitation ...
(PDF) 2010 A review of metal sulphide precipitation ...

Although there have been numerous studies on metal sulphide precipitation, the research field as a whole is not well integrated. This paper reviews the disparate areas of study into metal sulphide precipitation in an attempt to summarise the current

Membrane technology applied to acid mine drainage from ...
Membrane technology applied to acid mine drainage from ...

Acid, mine drainage (AMD) is a common byproduct of the mining industry, which results from the oxidation of ,sulfide, mineral waste in the presence of water, oxygen and microorganisms (Nordstrom et al. 2000).On occasion, this problem persists after mineral extraction has concluded due to poorly managed or non-existent closure of dumps and tailings dams (Morin et al. 1991; Adiansyah et al. 2015).

REMOVAL OF COPPER ZINC AND NICKL FROM ACID MINE …
REMOVAL OF COPPER ZINC AND NICKL FROM ACID MINE …

The percent of metal ions removal by adsorbents was calculated by the following ,equation,: %MS=CO-Ce CO *100 Mass balance ,equation, used to calculate the capacity of the adsorbents: qe= CO-Ce m *V Where, q e is amount of metal ions absorbed on adsorbents (mg/g); C 0 and C e are the initial and

REMOVAL OF COPPER ZINC AND NICKL FROM ACID MINE …
REMOVAL OF COPPER ZINC AND NICKL FROM ACID MINE …

The percent of metal ions removal by adsorbents was calculated by the following ,equation,: %MS=CO-Ce CO *100 Mass balance ,equation, used to calculate the capacity of the adsorbents: qe= CO-Ce m *V Where, q e is amount of metal ions absorbed on adsorbents (mg/g); C 0 and C e are the initial and

Minerals | Free Full-Text | Recovery of Metals from Waste ...
Minerals | Free Full-Text | Recovery of Metals from Waste ...

The hydrogen ,sulfide, gas that is produced is then used to precipitate metals as low solubility metal sulfides (,Equation, (2)) . 2CH 2 O + SO 4 2− → H 2 S + 2HCO 3 − (1)

Methods for Chemical Analysis of Water and Wastes
Methods for Chemical Analysis of Water and Wastes

----- 9.2 1 5 Add a second portion of 5 ml PDCA-chloroform reagent (7 7 1) and shake vigorously for 2 minutes Allow the phases to separate and combine the chloroform phase with that obtained in step (9214) 9216 Determine the pH of the aqueous phase and adjust to 4 5 9217 Repeat step (9214) again combining the solvent extracts 9218 Readjust the pH to 5 5, and extract a fourth tune Combine all …

Methods for Chemical Analysis of Water and Wastes
Methods for Chemical Analysis of Water and Wastes

----- 9.2 1 5 Add a second portion of 5 ml PDCA-chloroform reagent (7 7 1) and shake vigorously for 2 minutes Allow the phases to separate and combine the chloroform phase with that obtained in step (9214) 9216 Determine the pH of the aqueous phase and adjust to 4 5 9217 Repeat step (9214) again combining the solvent extracts 9218 Readjust the pH to 5 5, and extract a fourth tune Combine all …

ICWES15 -Comparative Absorption of Copper from Synthetic ...
ICWES15 -Comparative Absorption of Copper from Synthetic ...

ICWES15 -Comparative Absorption of ,Copper, from Synthetic and Real ,Wastewater, by Uncalcined Sodium Exchanged and ,Acid, Modified Montmorillonite. Presented by Dr christianah Olakitan Ijagbemi, Akure, Nigeria 1. Christy Ijagbemi Ph.

Removal of heavy metals from acid mine drainage by native ...
Removal of heavy metals from acid mine drainage by native ...

Acid, mine drainage (AMD) properties are high acidity, high concentration of sulfate and containing a wide range of heavy metal ions. This study was performed to remove the ,copper,, zinc and nickel from AMD by four native natural clay minerals including bentonite, two types of volcanic ash soil (VAS-I, VAS-II) and red soil using both batch and continuous techniques.

Minerals | Free Full-Text | Recovery of Metals from Waste ...
Minerals | Free Full-Text | Recovery of Metals from Waste ...

The hydrogen ,sulfide, gas that is produced is then used to precipitate metals as low solubility metal sulfides (,Equation, (2)) . 2CH 2 O + SO 4 2− → H 2 S + 2HCO 3 − (1)

Removal of heavy metals from acid mine drainage by native ...
Removal of heavy metals from acid mine drainage by native ...

Acid, mine drainage (AMD) properties are high acidity, high concentration of sulfate and containing a wide range of heavy metal ions. This study was performed to remove the ,copper,, zinc and nickel from AMD by four native natural clay minerals including bentonite, two types of volcanic ash soil (VAS-I, VAS-II) and red soil using both batch and continuous techniques.

Facile and Novel Chemical Synthesis Characterization and ...
Facile and Novel Chemical Synthesis Characterization and ...

This paper reports the successful synthesis of various ,copper sulfide, nanostructures via coprecipitation and hydrothermal routes using new starting reagents such as Na2SO3 as a reducing agent for converting Cu2+ to Cu+ and PMP dye–Cu(II) and carminic ,acid,–Cu(II) complexes as new ,copper, precursors for synthesizing quantum dots in aqueous medium.

Membrane technology applied to acid mine drainage from ...
Membrane technology applied to acid mine drainage from ...

Acid, mine drainage (AMD) is a common byproduct of the mining industry, which results from the oxidation of ,sulfide, mineral waste in the presence of water, oxygen and microorganisms (Nordstrom et al. 2000).On occasion, this problem persists after mineral extraction has concluded due to poorly managed or non-existent closure of dumps and tailings dams (Morin et al. 1991; Adiansyah et al. 2015).

Technology to detoxify cyanogen|Technology for waste water ...
Technology to detoxify cyanogen|Technology for waste water ...

Thermal hydrolysis method is suitable for treatment of wastwater containning high concentration of cyanogen/cyanide(2,000 ~50,000 mg/L).When cyanogen/cyanide containing ,wastewater, is kept at high temperaturs(170~260℃)in autoclave, hydrolisis occurs as ,Equation, (1) or (2),and cyanogen decomposes to ammonia and formic ,acid,.

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