scholarly journals The study of the particular aspects of water purification from the heavy metal ions using the method of nanofiltration

2020 ◽  
pp. 117-123
Author(s):  
I.M Trus ◽  
M.D Gomelya ◽  
I.M Makarenko ◽  
A.S Khomenko ◽  
G.G Trokhymenko
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Water Purification ◽  
Heavy Metal Ions

scholarly journals Effect of LDHs and Other Clays on Polymer Composite in Adsorptive Removal of Contaminants: A Review

Crystals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 957 ◽  
Author(s):  
Maleshoane Mohapi ◽  
Jeremia Shale Sefadi ◽  
Mokgaotsa Jonas Mochane ◽  
Sifiso Innocent Magagula ◽  
Kgomotso Lebelo
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Water Purification ◽  
Heavy Metal Ions ◽  
Layered Silicate ◽  
Preparation Methods ◽  
Anionic Clays ◽  
2D Nanomaterials ◽  
Double Hydroxides ◽  
And Diffusion

Recently, the development of a unique class of layered silicate nanomaterials has attracted considerable interest for treatment of wastewater. Clean water is an essential commodity for healthier life, agriculture and a safe environment at large. Layered double hydroxides (LDHs) and other clay hybrids are emerging as potential nanostructured adsorbents for water purification. These LDH hybrids are referred to as hydrotalcite-based materials or anionic clays and promising multifunctional two-dimensional (2D) nanomaterials. They are used in many applications including photocatalysis, energy storage, nanocomposites, adsorption, diffusion and water purification. The adsorption and diffusion capacities of various toxic contaminants heavy metal ions and dyes on different unmodified and modified LDH-samples are discussed comparatively with other types of nanoclays acting as adsorbents. This review focuses on the preparation methods, comparison of adsorption and diffusion capacities of LDH-hybrids and other nanoclay materials for the treatment of various contaminants such as heavy metal ions and dyes.

Polyurethane Foam Filled with Chitosan — Sorbent for Elimination of Oil Pollution

2019 ◽  
Vol 23 (5) ◽  
pp. 37-41
Author(s):  
Quyen Thi Quynh Anh ◽  
D.I. Fazilova ◽  
A.A. Nazirova ◽  
L.A. Zenitova ◽  
V.V. Yanov
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Polyurethane Foam ◽  
Water Purification ◽  
Heavy Metal Ions ◽  
Oil Pollution ◽  
Raw Material ◽  
Foam Filled ◽  
Short Time

It is proposed to use a sorbent based on polyurethane foam and natural raw material chitosan for water purification from oil pollution. Traditionally, chitosan and materials with its use are mainly used as purifiers of water and other media from heavy metal ions. This paper provides information on the use of chitosan, which is preliminary isolated from the waste from processing f various beetles, dead bees, etc. Sorbent synthesis occurs by mixing the components of polyurethane foam and chitosan in a very short time, which allows you to produce and use it directly on site.

Functionalization of polymeric membranes with phosphonic and thiol groups for water purification from heavy metal ions

2019 ◽  
Vol 10 (2) ◽  
pp. 337-346
Author(s):  
Valeriia Sliesarenko ◽  
Veronika Tomina ◽  
Oksana Dudarko ◽  
Maja Bauman ◽  
Aleksandra Lobnik ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Water Purification ◽  
Heavy Metal Ions ◽  
Polymeric Membranes ◽  
Thiol Groups

scholarly journals Magnetic Separation of Phosphate and Heavy Metal Ions Using Ferrimagnetic Particles for Water Purification.*

2002 ◽  
Vol 25 (1) ◽  
pp. 33-38 ◽  
Author(s):  
Nobuyuki GOKON ◽  
Ayano SHIMADA ◽  
Takahito MATSUOKA ◽  
Hiroshi KANEKO ◽  
Yutaka TAMAURA ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Magnetic Separation ◽  
Water Purification ◽  
Heavy Metal Ions

Nanotechnology-Based Nano-Biosorbents

2020 ◽  
pp. 386-408
Author(s):  
Mintu Maan Dutta ◽  
Anushmita Charingia
Keyword(s):  
Heavy Metal ◽  
Wastewater Treatment ◽  
Metal Ions ◽  
Water Purification ◽  
Heavy Metal Ions ◽  
Membrane Separation ◽  
Water Bodies ◽  
Modified Chitosan ◽  
Purification Methods ◽  
Industrial Sources

Most countries worldwide face the problem related to clean and safe water. The major source of contamination of water bodies includes the discharges of wastes from various domestic and industrial sources (heavy metal ions, dyes, and pharmaceuticals). To overcome those problems, various water purification methods such as coagulation, flocculation, adsorption, membrane separation, biological, and electrochemical methods have been engaged. Adsorption using nano-biosorbents based on chitin, chitosan and modified chitosan, cellulose, alginate, micro algal has emerged as a better alternative for the removal of contaminants from drinking and wastewater treatment. The main advantages of these nano-biosorbents include its biodegradability and eco-friendliness, which have attracted researchers to this field.

Sorption Purification of Effluent Water From Heavy Metal Ions by Modified Natural Zeolites

2017 ◽  
Vol 6 (2) ◽  
pp. 56-61 ◽  
Author(s):  
Обуздина ◽  
Marina Obuzdina ◽  
Руш ◽  
E. Rush ◽  
Шалунц ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Water Purification ◽  
Heavy Metal Ions ◽  
Point Of View ◽  
Effluent Water ◽  
Solution Ph ◽  
Economic Point ◽  
Sorption Purification ◽  
Cu Ions

Features of sorption method of effluent water purification are considered. Analysis of technologies of effluent water purification from heavy metalsionsis presented. Physico-chemical regularities of sorption of Zn, Ni, Cu ions are investigated. As sorbents it is proposed to use zeolites of Holinsky deposits, modified by sulfur polymer, obtained from waste of epichlorohydrin production. This will allow simultaneously solving two problems: elimination of waste and wastewater purification, which is significantly advantageous from the economic point of view. Kinetic curves of sorption of Zn, Ni, Cu ions in different solution concentrations are presented. Also the adsorption process of heavy metal ions from solutions of chemically modified zeolites in the evaluation of the influence of various factors (the contact time of sorbent with solution, pH and temperature) are investigated.

scholarly journals Research of pH influence on sorption properties of sorbents on a basis of residual biomass of microalgae Chlorella sorokiniana and duckweed Lemna minor

2019 ◽  
Vol 124 ◽  
pp. 01050
Author(s):  
N.A. Politayeva ◽  
Yu.A. Smyatskaya ◽  
I.V. Dolbnya ◽  
L.S. Kasobov ◽  
D.B. Rakhimov ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Water Purification ◽  
Heavy Metal Ions ◽  
Lemna Minor ◽  
Sorption Process ◽  
Chlorella Sorokiniana ◽  
Sorption Properties ◽  
Special Equipment ◽  
Residual Biomass

This scientific research is determined to a study of sorption process of heavy metal ions removal from aqueous solution at water purification with a help of sorption materials on a basis of residual biomass of microalgae and duckweed. It is known that Chlorella sorokiniana and duckweed Lemna minor have in their composition different valuable substances such as lipids, proteins, pigments, pectic substances. After their extraction residual biomass is formed. And in present study it is proposed for using as biosorbent for water purification. At different pH values the removal of ions of heavy metals (Zn(II), Cd(II), Pb(II), Cu(II)) occurs with varied efficiency; it is an important and informative parameter. Equilibrium and initial concentration of the solution with heavy metal ions were measured by voltammetric method of analysis with a use of special equipment. Chitosan was used as a component for making composite sorption materials with residual biomass of microalgae and duckweed. It is biopolymer which widely used in water purification. Due to this, prepared granules have good sorption properties. Nowadays in the era of technology and wide industrial production it is important and actual to develop new ecological technology and useful materials for water treatment and other fields for environment protection in general.

scholarly journals STUDY OF THE EFFICIENCY OF WATER PURIFICATION FROM HEAVY METAL IONS WITH MAGNETITE SORBENTS

2020 ◽  
pp. 46-51
Author(s):  
I.M. Trus ◽  
M.D. Gomelia ◽  
T.V. Krysenko ◽  
Ye.S. Bulhakov
Keyword(s):  
Heavy Metal ◽  
Water Treatment ◽  
Metal Ions ◽  
Sorption Capacity ◽  
Water Purification ◽  
Heavy Metal Ions ◽  
Sodium Sulfide ◽  
Partial Hydrolysis ◽  
High Degree ◽  
Hydrolysis Of

The process of water treatment from heavy metal ions on sorbents with magnetic properties was investigated. Samples of magnetite obtained at a ratio of the concentrations of iron (II) ions and iron (III) 1 : 2; 1 : 1 and 2 : 1, and samples modified with sodium sulfide were used. The effect of pH on the sorption efficiency of heavy metal ions on magnetite was studied. It was shown that the sorption capacity of magnetite towards heavy metal ions, as well as the efficiency of water treatment from these compounds, increases with an increase of the [Fe2+]/[Fe3+] ratio from 1 : 2 to 2 : 1. Sorption capacity of magnetite increases with increasing pH due to partial hydrolysis of heavy metal ions. Also sorption capacity of magnetite increases significantly if modified it with guanidine, thiosemicarbazide, and sodium sulfide. At the same time, the sorbent provides a high degree of water purification from heavy metal ions while reducing the metal concentrations to several µg/dm3. Ref. 12, Fig. 5, Tab. 1.

scholarly journals The combination of KMnO4 with HMO for cycles adsorption of heavy metal ions and regeneration of adsorbents

2021 ◽  
Author(s):  
Ruyue Ding ◽  
Chao Liu ◽  
Fencun Xie
Keyword(s):  
Heavy Metal ◽  
Zeta Potential ◽  
Metal Ions ◽  
Manganese Dioxide ◽  
Water Purification ◽  
Heavy Metal Ions ◽  
Competitive Adsorption ◽  
Removal Rate ◽  
Highly Active

Abstract In this experiment: three kinds of hydrous manganese dioxide (HMO) with different Zeta potential were synthesized, and combined with KMnO4 for deep removal of Pb2+, Cd2+ and Ni2+. The competitive adsorption of three heavy metal ions was also investigated. The results indicated that the stronger the acidity, the higher the Zeta potential (-54.3) of the synthesized HMO. After regenerating HMO with acidic KMnO4 as eluent, the removal rates of Pb2+, Cd2+ and Ni2+ could still reach 79.25%, 80.13% and 60.43% after five cycles of adsorption. The promoting mechanism of KMnO4's effect on HMO was analyzed by SEM, TEM, EDS, FTIR, XRD, XPS, BET, UV-vis. After absorbing of heavy metal ions, HMO will release part of Mn (II), and the released Mn (II) reacts with KMnO4 to form a small amount of highly active in-situ HMO. ‘HMO + KMnO4’ system can not only improve the removal rate of heavy metal ions by HMO, reduce the amount of adsorbent, but also remove the released Mn (II). Because of its reproducibility, efficiency and simplicity, the research on water purification materials and technologies is of significance.

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