Neutralization of Acid Wastewater and Magnesium Hydroxide Slurry from Seawater Electrolytic Pretreatment

Produced in industrial production processes such as electrolysis, electroplate and metal pickling, industrial wastewater, which contains acids, varieties of heavy metal and whose pH value is less than 6, can be very damaging to our daily life and environment and is an urgent issue to be solved. In recent years, with environmental protection becoming an important issue around the world, and environmental regulations becoming more and more complete, the traditional water treatment technology which can cause secondary pollution is gradually restricted, and this leads to the result that environmental scientists and engineers pay more attention on the development and application of "environmentally friendly" water treatment technology[1]. Of all acid wastewater neutralizers, magnesium hydroxide, known as "green and safe neutralizer"[2, 3], is safe, reliable, non-toxic, harmless, and has high buffer performance, high activity, high adsorption capacity, and no corrosivity compared with traditional strong alkali substances (such as CaO, Ca (OH)2and NaOH, etc.). Therefore magnesium hydroxide has been widely used in the acid wastewater neutralization[4].

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Discussion on Feed-Water Treatment Technology of Supercritical Unit

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1092-1093.831 ◽

2015 ◽

Vol 1092-1093 ◽

pp. 831-837

Author(s):

Guo Hua Lu ◽

Qiao Ling Peng ◽

Shun An Cao

Keyword(s):

Water Quality ◽

Water Treatment ◽

Ph Value ◽

Operating Efficiency ◽

Feed Water ◽

Low Oxygen ◽

Treatment Technology ◽

Water Steam ◽

Water Treatment Technology ◽

Steam System

The oxygenated feed-water treatment technology of supercritical unit can effectively decrease the corrosion of water-steam system, and thus steam-water quality and operating efficiency are greatly promoted. In view of modes of feed-water treatment technology for supercritical unit, the characteristics of oxide film in thermal system under AVT and OT conditions are compared; and then, the principle of oxygenated feed-water treatment technology was elaborated. Besides, the oxygenated conditions, controlling of water quality, advantages, the relation between formation of oxide scale and oxygen plus are analyzed. Finally, the paper introduced weak oxiding feed-water treatment technology, with the principle of low oxygen and high pH value.

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Synthesis of New Magnetic Crosslinked Poly (Ionic Liquid) Nanocomposites for Fast Congo Red Removal from Industrial Wastewater

Nanomaterials ◽

10.3390/nano9091286 ◽

2019 ◽

Vol 9 (9) ◽

pp. 1286 ◽

Cited By ~ 3

Author(s):

Ayman M. Atta ◽

Abdelrahman O. Ezzat ◽

Yaser M. Moustafa ◽

Nourah I. Sabeela ◽

Ahmed M. Tawfeek ◽

...

Keyword(s):

Congo Red ◽

Industrial Wastewater ◽

Adsorption Process ◽

Advanced Materials ◽

Desorption Kinetics ◽

Particle Sizes ◽

High Adsorption ◽

Secondary Pollution ◽

High Adsorption Capacity ◽

Poly Ionic Liquid

Advanced materials reliant on cross-linked magnetic poly (ionic liquids) (PILs) have been widely utilized in environmental applications for water purification. The present work demonstrates our preparation of a new magnetic cross-linked PIL based on quaternized 4-vinyl-pyridine-co-acrylamide (QVP/AAm). The chemical composition, thermal stability, magnetic properties, morphology, particle sizes, and zeta potential of the magnetic QVP/AAm composites were investigated. Fast adsorption and desorption kinetics, high adsorption capacity, rapid magnetic separation, and the absence of secondary pollution in the adsorption process make QVP/AAm-Fe3O4 a highly effective adsorbent for the elimination of anionic acidic Congo red contaminants from industrial wastewater.

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Feed-Water Treatment Technology of Supercritical Unit

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1081.103 ◽

2014 ◽

Vol 1081 ◽

pp. 103-109

Author(s):

Guo Hua Lu ◽

Qiao Ling Peng ◽

Shun An Cao

Keyword(s):

Water Quality ◽

Water Treatment ◽

Ph Value ◽

Operating Efficiency ◽

Feed Water ◽

Low Oxygen ◽

Treatment Technology ◽

Water Steam ◽

Water Treatment Technology ◽

Steam System

The oxygenated feed-water treatment technology of supercritical unit can effectively decrease the corrosion of water-steam system, and thus the steam-water quality and the operating efficiency are greatly promoted. In view of the mode of feed-water treatment for supercritical unit, the characteristics of oxide film in thermal system under AVT and OT conditions are compared; and then, the principle of oxygenated feed-water treatment technology was elaborated. Besides, the oxygenated conditions, controlling of water quality, advantages, the relation between the formation of oxide scale and oxygen plus are analyzed and discussed. Finally, the paper introduced weak oxiding feed-water treatment technology for supercritical unit, with the principle of low oxygen and high pH value.

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Application of Electrosorption Desalination Technology in Coking Wastewater Treatment

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.573-574.516 ◽

2012 ◽

Vol 573-574 ◽

pp. 516-520

Author(s):

Nan Zhang ◽

Gai Feng Xue ◽

Pu Liu ◽

Li Na Wang

Keyword(s):

Water Treatment ◽

Ph Value ◽

Removal Rate ◽

Cooling Water ◽

Economic Benefits ◽

Coking Wastewater ◽

Toxic Substances ◽

Treatment Technology ◽

Circulating Cooling Water ◽

Water Treatment Technology

Coking wastewater is generated from metallurgy industry and it contains many highly toxic substances. Because the coking wastewater would bring about severe environmental pollution, it is best to reuse it as circulating cooling water. However, there are large quantities of ions in coking wastewater, which would cause serious corrosion to the pipe and the devices in the process of recycling. Therefore, desalting techniques are necessary for the reused of coking wastewater. Electrosorption technique (EST), as a new type of water treatment technology, can meet the economic benefits of water treatment technology. It also can achieve better water quality and reliability standards which have never been achieved before. In this paper, a new electrosorption device was invented and it was used for desalting of coking wastewater. The main parameters affecting the electrosorption of ions including voltage, electrosorption time, pH value, temperature and electric current have been investigated in detail. Under the optimized experimental condition, after electrosorption process, a salt removal rate of 75% was obtained. The quality of effluent could satisfy the criterion of industrial circulating cooling water (GB 50050-2007) and could be reused as the circulating cooling water in coking plant.

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