scholarly journals Baromembrane technologies for purification of industrial wastes, using pulse water treatment

2020 ◽  
Vol 98 (2) ◽  
pp. 83-91
Author(s):  
Е.Е. Ergozhin ◽  
◽  
Т.K. Chalov ◽  
Т.V. Kovrigina ◽  
Ye.А. Melnikov ◽  
...  
Keyword(s):  
Water Treatment ◽  
Industrial Wastes ◽  
Pulse Water

Iron-based water treatment residuals as sorbent of heavy metals and metalloids

2020 ◽  
Author(s):  
Magdalena Wołowiec ◽  
Małgorzata Komorowska-Kaufman ◽  
Alina Pruss ◽  
Grzegorz Rzepa ◽  
Tomasz Bajda
Keyword(s):  
Heavy Metals ◽  
Water Treatment ◽  
Animal Health ◽  
Drinking Water Treatment ◽  
Industrial Wastes ◽  
Water Treatment Residuals ◽  
Metals And Metalloids ◽  
Waste Products ◽  
Desorption Process ◽  
Heavy Metals And Metalloids

<p>The ever-increasing water pollution caused by an increase in industrial activity in developing countries is a major worldwide problem. Heavy metal contamination is particularly dangerous because of their toxic and carcinogenic nature as well as harmful effects on human and animal health. Over the past decades, considerable efforts have been made to develop effective technologies for removing heavy metals from water. Adsorption seems to be the most promising out of the many methods. Conventional adsorbents used to remove heavy metals include activated carbon or clay minerals. However, due to the need for waste management, waste products have recently become very popular, especially industrial wastes containing iron and/or aluminum oxides. One of the possible sorbent are water treatment residuals (WTRs) which are generated during drinking water treatment process. The aim of this work was to examine the possibility of using residuals from deironing of underground water (G-WTRs) as effective sorbents of Cd (II), Pb(II), Zn(II), Cu(II), Cr(III), Cr(VI) P(V), and As(V) as a function of initial concentration, pH, temperature and time.</p><p>The G-WTRs were poorly crystalline and composed predominantly of ferrihydrite with minor calcite and quartz admixture. The main chemical components were iron (32%) and calcium (17%). Specific surface area was 144 m<sup>2</sup>/g with a total pore volume of 0.181 cm<sup>3</sup>/g. The proportion of micropores was 29%, mesopores occupied the greatest volume – 54%, while micropores the lowest volume – 17%.</p><p>Cation sorption efficiecy was almost 100%, in the case of anions it ranges between 50 – 100%. Sorption capacity increased with an increase in the initial pollutant concentration. Adsorption of the metal cations was higher with and increasing pH of the solution and the best results were obtained for pH 6.0 to 7.0. While anions were preferably sorbed in lower pH. Sorption was the efficient in the temperature range of 20-40 ℃. The greatest differences in the sorption efficiency were observed within the first 2 – 4 h. The possible sorption mechanism was chemisorption.</p><p>The results showed that G-WTRs can be effective and cheap sorbents of heavy metals and metalloids. However, further research including desorption process as well as the long-term stability of formed metal-G-WTRs complexes.</p><p><strong>Acknowledgments: </strong>This work was financed by the National Science Centre, Poland Grant No. 2017/27/N/ST10/00713.</p>

Sustainable Water Treatment: Use of Agricultural and Industrial Wastes to Remove Mercury by Biosorption

2021 ◽  
Vol 232 (7) ◽  
Author(s):  
Elaine Fabre ◽  
Carlos Vale ◽  
Eduarda Pereira ◽  
Carlos M. Silva
Keyword(s):  
Water Treatment ◽  
Industrial Wastes ◽  
Treatment Use

To the issue of water treatment by hydrocyclone on the systems of the combined irrigation

2020 ◽  
Vol 0 (2) ◽  
pp. 21-25
Author(s):  
Nikolay Dubenok ◽  
Andrey Novikov ◽  
Sergei Borodychev ◽  
Maria Lamskova
Keyword(s):  
Water Treatment ◽  
Organic Compounds ◽  
Irrigation Water ◽  
Irrigation System ◽  
Petroleum Products ◽  
Cylindrical Part ◽  
Agricultural Landscapes ◽  
Treatment Unit ◽  
Drain Pipe ◽  
Irrigation Network

At the stage of water treatment for irrigation systems, the efficiency capture coarse and fine mechanical impurities, as well as oil products and organic compounds affects the reliability of the equipment of the irrigation network and the safety of energy exchange processes in irrigated agricultural landscapes. The violation of work irrigation system can cause disruptions in irrigation schedules of agricultural crops, crop shortages, degradation phenomena on the soil and ecological tension. For the combined irrigation system, a water treatment unit has been developed, representing a hydrocyclone apparatus with a pipe filter in the case. For the capacity of 250 m3/h the main geometrical dimensions of hydrocyclone have been calculated. To organize the capture petroleum products and organic compounds, it has been proposed a modernization of a hydrocyclone unit, consisting in dividing the cylindrical part of the apparatus into two section. The first is section is for input irrigation water, the second one is for additional drainage of clarified irrigation water after sorption purification by the filter, placed on the disk and installed coaxially with the drain pipe and the pipe filter.

Simple improvements for emergency batch water treatment

Waterlines ◽  
2007 ◽  
Vol 26 (1) ◽  
pp. 17-19 ◽  
Author(s):  
Caetano Dorea
Keyword(s):  
Water Treatment

Bulk water treatment unit performance: For the cameras or the community?

Waterlines ◽  
2012 ◽  
Vol 31 (1-2) ◽  
pp. 53-66 ◽  
Author(s):  
Richard Luff ◽  
Caetano Dorea
Keyword(s):  
Water Treatment ◽  
Bulk Water ◽  
Treatment Unit ◽  
Unit Performance

Improvement of Lake Water Quality by using Moving Rapid Water Treatment System

2018 ◽  
Vol 18 (1) ◽  
pp. 107-115 ◽  
Author(s):  
Kwang-Hee Lee ◽  
◽  
Min-Ho Kim ◽  
Nam-Woo An ◽  
Chul-hwi Park
Keyword(s):  
Water Quality ◽  
Water Treatment ◽  
Lake Water ◽  
Treatment System ◽  
Lake Water Quality ◽  
Water Treatment System
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