Welcome to the company ! we have many years of professional experience !
rsdgj@pyzyrsd.com +86 513525609655

Why is wastewater 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.

Certificate of Honor

Get in touch with us

We will confidentially process your data and will not pass it on to a third party.

Why is wastewater acidic
[PDF] Chemical Forms of Mercury in Pyrite: Implications ...
[PDF] Chemical Forms of Mercury in Pyrite: Implications ...

Pyrite, (cubic FeS2) is the most abundant metal sulfide in nature and also the main host mineral of toxic mercury (Hg). Release of mercury in ,acid, mine drainage resulting from the oxidative dissolution ,of pyrite, in coal and ore and rock resulting from mining, processing, waste management, reclamation, and large construction activities is an ongoing environmental challenge.

Lactate oxidation in pyrite suspension: a Fenton-like ...
Lactate oxidation in pyrite suspension: a Fenton-like ...

Pyrite, is a common mineral at many mining sites. In this study, the mineral ,pyrite, was studied as a Fenton-like reagent for environmental concerns. We selected lactate as a model target molecule to evaluate the Fenton-like catalytic efficiency ,of pyrite, upon organic oxidation. A complete set of ,control, experiments in both aerobic and anaerobic atmospheres unequivocally established that the ...

US5645730A - Acid wastewater treatement - Google Patents
US5645730A - Acid wastewater treatement - Google Patents

A process for treating ,acid wastewater, containing heavy metals has been invented, the process including adding fly ash to the ,acid wastewater, to reduce heavy metals content of the ,acid wastewater,. In one aspect the ,acid wastewater, contains soluble iron and adding fly ash reduces the level of soluble iron. In one aspect the ,acid wastewater, contains sulfate ions and adding fly ash reduces the ...

A Novel Approach to Prevention of Acid Rock Drainage (ARD ...
A Novel Approach to Prevention of Acid Rock Drainage (ARD ...

The proposed research will evaluate a novel agent for its potential to: (1) ,control acid, rock drainage (ARD) at its source, and (2) stop ARD once it starts. The agent in low concentrations is a potent toxicant to acidophilic ,pyrite,-oxidizing bacteria. These bacteria play a major role in the formation of ARD from sulfidic mine tailings.

MaxH O DESALTER technology treats calcium sulphate ...
MaxH O DESALTER technology treats calcium sulphate ...

quality issue for mining operations, and its ,control, levels are based primarily on secondary drinking water recommendations of approximately 500 mg/L. Two methodologies are mainly used, stand-alone or in combinationto remove ,sulphate from ,acid, mine water: membrane separation or salt precipitation, for example formation of gypsum.

ALKALINE FOUNDATION DRAINS AND ALKALINE AMENDMENTS …
ALKALINE FOUNDATION DRAINS AND ALKALINE AMENDMENTS …

composition of this refuse is ,pyrite, and other minerals that are rejected during the coal cleaning process. ,Pyrite, is the main environmental concern because it will oxidize to form ,Acid, Mine Drainage (AMD). AMD produced at a mining operation is ideally neutralized by alkaline material in the overburden, but refuse usually lacks alkaline material.

2.1. Prepare of phosphate ore and pyrite for leaching ...
2.1. Prepare of phosphate ore and pyrite for leaching ...

Leaching experiment of a mixture of phosphate ore and ,pyrite, is performed with bacterial culture . At. ferrooxidans. B2 isolated from the lake Robule of copper mine Bor, Serbia. The . At. ferrooxidans. in the presence of water and oxygen oxidized ,pyrite, to produce sulfuric ,acid, and FeSO. 4, which is then microbiologically oxidized to Fe. 2 (SO ...

A Novel Approach to Prevention of Acid Rock Drainage (ARD ...
A Novel Approach to Prevention of Acid Rock Drainage (ARD ...

The proposed research will evaluate a novel agent for its potential to: (1) ,control acid, rock drainage (ARD) at its source, and (2) stop ARD once it starts. The agent in low concentrations is a potent toxicant to acidophilic ,pyrite,-oxidizing bacteria. These bacteria play a major role in the formation of ARD from sulfidic mine tailings.

Characteristic and Regulation.docx - Characteristics of ...
Characteristic and Regulation.docx - Characteristics of ...

The chemical reaction for the oxidation ,of pyrite, can be expressed as below: − ¿ + 8 H 2 SO 4 4 Fe S 2 + 15 O 2 + 14 H 2 O → 4 Fe (OH) 3 ¿ ,Pyrite, + Oxygen + Water → Yellowboy + Sulfuric ,Acid, By lowering the pH value and elevating the level of total dissolved solids, total suspended solids and heavy metals, occurrence of ,acid, mine drainage affect the water quality of nearby water sources.

Fenton-Like Oxidation of Refractory Chemical Wastewater ...
Fenton-Like Oxidation of Refractory Chemical Wastewater ...

In this study, ,pyrite,, a natural iron bearing mineral, was used as a new kind of Fenton-like catalyst in the treatment of textile ,wastewater,. The catalytic activity ,of pyrite, and the parameters influencing the removal of Chemical Oxygen Demand (COD) and Biochemical Oxygen Demand (BOD5), such as ,pyrite, dosage, H2O2 concentration, pH, and suspended solids (SS) had been systematically examined.

Acid Mine Drainage Reduced with Calcium Hydroxide (Lime ...
Acid Mine Drainage Reduced with Calcium Hydroxide (Lime ...

The low acidity of the water is a byproduct of the oxidation ,of pyrite,, the crystalline form or iron sulfide. ,Acid, mine drainage can be easily spotted by the orange color of the water. Laws have been passed by the Department of Environmental Protection to deter any new mining from creating AMD.

GB 26132-2010 PDF. - Chinese Standard
GB 26132-2010 PDF. - Chinese Standard

Sulfuric ,acid,, ,pyrite,, ,acid, and Gypsum ,acid, 6~9 6~9 Corporate ,wastewater, discharge 2 Chemical oxygen demand (CODCr) 50 60 3 suspended matter 15 50 4 Petroleum 3 3 5 ammonia nitrogen 5 8 6 total nitrogen 10 15 7 total phosphorus 0.5 0.5 8 sulfide ,Pyrite,-based ,acid, and gypsum ,acid, 0.5 …

Lactate oxidation in pyrite suspension: a Fenton-like ...
Lactate oxidation in pyrite suspension: a Fenton-like ...

A complete set of control experiments in both aerobic and anaerobic atmospheres unequivocally established that the pyrite in aqueous solution could spontaneously in situ generate (·)OH and H(2)O(2), serving as a Fenton-like reagent to catalyze the oxidation of lactate to pyruvate with no need for additional H(2)O(2).

ISSN: 2456-9992 Chemical Method For Wastewater Management ...
ISSN: 2456-9992 Chemical Method For Wastewater Management ...

usually conducted in a batch reactor for easy ,control, of pH, which is often in the range of 3-3.5. The reaction occurs in an oxidation tank, in which ,wastewater, is initially allowed to flow into the tank, followed by addition of dilute H 2 SO 4 to ensure acidic conditions. Further to that, catalyst and ,acid, or

[PDF] Chemical Forms of Mercury in Pyrite: Implications ...
[PDF] Chemical Forms of Mercury in Pyrite: Implications ...

Pyrite, (cubic FeS2) is the most abundant metal sulfide in nature and also the main host mineral of toxic mercury (Hg). Release of mercury in ,acid, mine drainage resulting from the oxidative dissolution ,of pyrite, in coal and ore and rock resulting from mining, processing, waste management, reclamation, and large construction activities is an ongoing environmental challenge.

ALKALINE FOUNDATION DRAINS AND ALKALINE AMENDMENTS …
ALKALINE FOUNDATION DRAINS AND ALKALINE AMENDMENTS …

Thiobacillus thiooxidans, and Thiobacillus ferrooxidam) can oxidize ,pyrite, in concentrations as low as 1% oxygen. The problems occur when there is an insufficient amount of alkaline material in the refuse to neutralize the ,acid, produced and the resulting AMD seepage is formed (Watzlaf and Hammack).

ISSN: 2456-9992 Chemical Method For Wastewater Management ...
ISSN: 2456-9992 Chemical Method For Wastewater Management ...

usually conducted in a batch reactor for easy ,control, of pH, which is often in the range of 3-3.5. The reaction occurs in an oxidation tank, in which ,wastewater, is initially allowed to flow into the tank, followed by addition of dilute H 2 SO 4 to ensure acidic conditions. Further to that, catalyst and ,acid, or

Recovery of Calcium Carbonate from Wastewater Treatment ...
Recovery of Calcium Carbonate from Wastewater Treatment ...

and calcium ions participate in the depressive effect on ,pyrite, by the formation of mixed films of Fe(OH), FeO(OH), CaSO. 4 . and CaCO. 3. on the surface [15]. The aim of this study was to recover calcium carbonate which was used after treatment of ,acid, mine water from the sludge. Flotation was selected as a feasible technique to recover the CaCO. 3

Chat Online Inquiry Email

Business cooperation

+86 513525609655

Company address

Road West, North Branch, Jingkai Road, Puyang City