Water Purification
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2021 ◽  

Various organic and synthetic polymers are important materials for the removal of organic and inorganic pollutants from wastewater and the separation of gases. The book discusses various types of membranes for microfiltration, ultrafiltration, nanofiltration, reverse osmosis, forward osmosis etc. A number of nanomaterials are available for the modification of polymeric membranes.

2022 ◽  
Vol 424 ◽  
pp. 127424
Menglu Zhang ◽  
Yu Yang ◽  
Xiaoqiang An ◽  
Jingjing Zhao ◽  
Yueping Bao ◽  

Weichao Dong ◽  
Yuchao Wang ◽  
Yajing Zhang ◽  
Xiangju Song ◽  
Hui Peng ◽  

2021 ◽  
Vol 13 (19) ◽  
pp. 11075
Adeyemi O. Adeeyo ◽  
John O. Odiyo ◽  
Abimbola M. Enitan ◽  
Machawe M. Motsa ◽  
Titus A.M. Msagati ◽  

The leaf, stem, and root of wild sesame with eco-physiological functions of water and mineral sorption were targeted for water treatment. Morphometric properties of the plant sections were investigated by light microscopy. Structural and surface characteristics of pulverized samples were studied by thermogravimetry (TGA), Raman spectroscopy, Brunauer–Emmett–Teller (BET), and Scanning electron microscopy. Wettability and sorption potentials were studied by sessile drop analysis, while a methylene blue dye polluted water treated with the plant’s sorbents was assessed by UV–Vis spectroscopy. The presence of parenchyma cells, trichomes, vessels, fibres, cellulose, lignin, and other pore-containing structures was confirmed. The stem and root biomasses possessed comparatively higher pore sizes (0.011 and 0.124 µm, respectively), surface energy (33.32 and 31.8 mN/m), and dispersive components (32.45 and 31.65 mN/m). The leaf was high in polar components and had a biomass surface area of 3.19 m2/g. Water treated with the root and stem sorbents gave the lowest dye concentration (0.19 mg/L and 0.20 mg/L, respectively) in treated effluent at 120 mins. It was noted that eco-physiological properties informed water purification potentials of the sampled biomasses and could be used for bioprospecting of useful plant materials for water purification. This study established that functional components of plants, porous characteristics, and surface properties of the materials studied are important factors when considering plant sorbents for water purification.

Water ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 2763
Long Ho ◽  
Peter Goethals

This special issue consists of fourteen selected articles, that cover a wide spectrum of Ecosystem Services (ES) of lakes and reservoirs, including: (1) water purification [...]

Dmitry Samchenkо ◽  
Mykola Monastyrov ◽  
Gennadii Kochetov ◽  
Anastasia Snitko ◽  
Bogdan Yemchura

Сurrent state and efficiency of existing sorbtion methods of industrial wastewater treatment are considered. The influence of important parameters for sorbtion process - ratio of metal ion and nanosorbent concentrations in solution, as well as the method of sorbent addition into wastewater on degree of its purification was studied. The most effective results of water purification were achieved with usage of freshly obtained powder of electroerosive dispersion (EED) of iron in water in the form of a suspension at ratio of the concentration of Zn2+ ions and nanosorbent powder 1:10. It Under such conditions a high degree of removing as 98% is determined, and obtained purified solution meets the standards of rising water at galvanic facilities, regarding of Zn2+ content.

Solar RRL ◽  
2021 ◽  
Shanshan Wu ◽  
Zhaofen Xu ◽  
Junlei Zhang ◽  
Mingshan Zhu

Baolv Hua ◽  
Ziyan He ◽  
Lu Zheng ◽  
Fengting Li

Xiuying Zhu ◽  
Mengjie Li ◽  
Lian Song ◽  
Xiong-Fei Zhang ◽  
Jianfeng Yao

2021 ◽  
Vol 55 (5) ◽  
Do Quang Minh ◽  
Thai Tien Dat ◽  
Nguyen Hoc Thang ◽  
Kieu Do Trung Kien ◽  
Pham Trung Kien ◽  

Treatment of the sludge from water-purification plants is becoming more and more urgent due to the inability to increase its storage area. To avoid CO2 emissions, the use of non-Portland cement binders is recommended. The application of geopolymerization of waste sludge (WS) from water-purification plants is a novel solution. Curing conditions including high temperature, pressure or microwaves enhance the formation of geopolymer bonds. This paper presents the results of a research on the treatment of the WS of the Thu Duc water-purification plant (Vietnam) with the geopolymerization method. Solid phases were prepared by mixing the WS and fly ash (FA). The FA proportions of the solid phases were (10, 40, 70) w/%. The alkali-activated solution (AAS) was a mixture of a 40 w/% NaOH 6M solution and 60 w/% water glass (WG: Na2O.nSiO2 with n = 1.75 and volumetric density r  = 1.40 kg/L). The geopolymer materials were mixtures containing an 80 w/% solid phase and a 20 w/% liquid phase of the AAS. Geopolymer samples were formed in a cylindrical steel mold with a diameter of 10 mm at a high pressure. The samples were cured in a 112 W microwave oven for 30 s or in a dryer at 110 °C for 24 h. The compressive strength and volumetric density of both sample groups were determined and compared to each other. The formation of geopolymer bonds was investigated using XRD, FTIR and SEM.

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