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Is fracturing flowback fluid dangerous

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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Is fracturing flowback fluid dangerous
Reduction of iron (II) ions in synthetic acidic wastewater ...
Reduction of iron (II) ions in synthetic acidic wastewater ...

occurred because of high-level water pollution due to increased human activity in the industrial and mining sectors. Heavy metal from industrial and mining waste that can threaten the health of the population, source of life and ecological system is iron (II). The iron metal tends to accumulate in living organisms, which can trigger various

CN101665311A - Catalysis and micro-electrolysis combined ...
CN101665311A - Catalysis and micro-electrolysis combined ...

The invention relates to a catalysis and micro-electrolysis combined technology for high-,concentration, refractory organic ,wastewater,; the organic ,wastewater, is collected to an adjusting tank and enters an air floatation tank for air floatation treatment to remove part of the organic matters after the adjustment of water volume and water quality; the scruff is collected or recovered; the wastewatergoes through Ph adjustment and then enters a catalytic ,iron, …

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

Usually phenolic ,wastewater, with a mass ,concentration, of 1000mg/L is called ,high,-,concentration, phenol-,containing wastewater,, and this kind of ,wastewater, must be recovered after treatment. The phenol-,containing wastewater, with a mass ,concentration, of less than 1000 mg/L is called a low ,concentration, phenol-,containing wastewater,.

Acid mine drainage - Wikipedia
Acid mine drainage - Wikipedia

In many localities, the liquid that drains from coal stocks, coal handling facilities, coal washeries, and coal waste tips can be highly acidic, and in such cases it is treated as acid rock drainage. This liquid often contains toxic metals, such as copper or iron.

Enriched Co-Treatment of Pharmaceutical and Acidic Metal ...
Enriched Co-Treatment of Pharmaceutical and Acidic Metal ...

Keywords: zero-valent ,iron,; cotreatment; ,acidic, mine drainage; fluidized-bed reactor 1. Introduction ,Acidic, mine water resulting from the open mine tailings often contains sulfates and a complex mixture of heavy metal ions. These mine tailings are characterized to have a ,high concentration, of sulfide ,containing, minerals, such as pyrite (FeS2).

Degradation of organic wastewater containing Cu EDTA by Fe ...
Degradation of organic wastewater containing Cu EDTA by Fe ...

This kind of ,wastewater, contains not only lots of organic matters but also a ,high concentration, of heavy metals. It is well known that, in the presence of chelating agents like EDTA, the performance of metal removal can be adversely affected due to the formation of soluble complexes like Cu−EDTA (CH2N)2[(CH2COO)2Cu]2,

Heavy Metals Removal Industrial Wastewater Solutions
Heavy Metals Removal Industrial Wastewater Solutions

Acidic, streams ,containing iron,, aluminum, and sulfate are treated for removal of these contaminants. Another driver for segregating and treating this stream is ever-decreasing mercury limits. These limits make it desirable to treat the stream prior to comingling with more conventional ,wastewater, streams.

Acid mine drainage - Wikipedia
Acid mine drainage - Wikipedia

In many localities, the liquid that drains from coal stocks, coal handling facilities, coal washeries, and coal waste tips can be highly ,acidic,, and in such cases it is treated as acid rock drainage. This liquid often contains toxic metals, such as copper or ,iron,.

Research on Treating Acid Wastewater Containing Heavy Metal
Research on Treating Acid Wastewater Containing Heavy Metal

wastewater, treatment. Some successes in ,wastewater containing, heavy metal ions treatment has recently been achieved by SRB. And it has become a hot point and front line gambit among the field of relevant ,wastewater, treatment. A. Chromium-,Containing Wastewater, . ,Acidic wastewater, from electroplating, tanning, mining

Advancements in the Fenton Process for Wastewater ...
Advancements in the Fenton Process for Wastewater ...

8/6/2019, · Fenton process was employed to treat synthetic dye wastewater with a supply of Fe 2+ electrolytically generated from iron-containing sludge . The concentration of Fe 2+ increases linearly ( r 2 of 0.94) with increasing electrolysis time, but the amount of total iron provided is enough and not the limiting factor for the electrogeneration of Fe 2+ .

Iron (Fe) and water - Lenntech
Iron (Fe) and water - Lenntech

Iron removal from water is mostly carried out in drinking water preparation, because mineral water contains high amounts of iron ions. These influence water colour, odour and turbidity. Iron is present in all wastewaters. Iron removal from wastewater may be achieved by oxidation of binary iron to tertiary iron.

Research on Treating Acid Wastewater Containing Heavy Metal
Research on Treating Acid Wastewater Containing Heavy Metal

wastewater, treatment. Some successes in ,wastewater containing, heavy metal ions treatment has recently been achieved by SRB. And it has become a hot point and front line gambit among the field of relevant ,wastewater, treatment. A. Chromium-,Containing Wastewater, . ,Acidic wastewater, from electroplating, tanning, mining

(PDF) Research on Treating Acid Wastewater Containing ...
(PDF) Research on Treating Acid Wastewater Containing ...

With the presence of ,iron,, the acclimation period of SRB reduces more than 20% under ,high, Zn 2+ ,concentration,; the inhibiting ,concentration, of Zn 2+ to SRB increases by approximately 20%; the ...

Enriched Co-Treatment of Pharmaceutical and Acidic Metal ...
Enriched Co-Treatment of Pharmaceutical and Acidic Metal ...

This work demonstrated nanoscale zero-valent ,iron,‘s efficacy as an enhancing element for remediating real mine water and pharmaceutical-,containing wastewater, from a hospital. The laboratory-scale fluidized-bed reactor proved to simultaneously remove metal ions, like Mn and Zn, from ,wastewater, while achieving a significant reduction of SO 4 2− and organic matter (COD, BOD, DOC), TDN.

Oxalic Acid Recovery from High Iron Oxalate Waste Solution ...
Oxalic Acid Recovery from High Iron Oxalate Waste Solution ...

In contrast, one industrially feasible method is to selectively extract REEs from high-,concentration iron, solutions. First, the Fe(II) ions in the acid leachate are oxidized to Fe(III), which have a minor effect on REE product purity, before the REEs are selectively precipitated as REE oxalate products, to leave the ferric ,iron, in the raffinate.

Iron (Fe) and water - Lenntech
Iron (Fe) and water - Lenntech

Iron, removal from water is mostly carried out in drinking water preparation, because mineral water contains high amounts of ,iron, ions. These influence water colour, odour and turbidity. ,Iron, is present in all wastewaters. ,Iron, removal from ,wastewater, may be achieved by oxidation of binary ,iron, to tertiary ,iron,.

Removing Heavy Metals From Wastewater
Removing Heavy Metals From Wastewater

The goal of the rapid mix operation is to first raise the ,wastewater, pH to form metal hydroxide particles, as discussed above. After the addition of caustic, the next step is to add aluminum or ,iron, salts, or organic polymers (coagulants) directly to the ,wastewater,. These polymers attach to …

Chemical & pH Adjustment - Evoqua
Chemical & pH Adjustment - Evoqua

In air stripping processes, the groundwater pH may rise due to the loss of ,acidic, carbon dioxide through the air stripping. The increased pH causes precipitation and scaling of minerals such as calcium, magnesium, ,iron, and manganese. Injection of an acid solution may be needed to prevent the rise in pH and subsequent mineral precipitation.

Biological removal of iron and sulfate from synthetic ...
Biological removal of iron and sulfate from synthetic ...

4/12/2019, · Diluted concentrations of cotton linters ,wastewater containing, 50-400 ppm ,iron, were added to the reactor. After the bacteria fixation to different ,iron, concentrations, the maximum removal efficiency of ,iron, and sulfate was achieved 85.3 % and 78.4 % …

Iron (Fe) and water - Lenntech
Iron (Fe) and water - Lenntech

Iron, removal from water is mostly carried out in drinking water preparation, because mineral water contains ,high, amounts of ,iron, ions. These influence water colour, odour and turbidity. ,Iron, is present in all wastewaters. ,Iron, removal from ,wastewater, may be achieved by oxidation of binary ,iron, to tertiary ,iron,.

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