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.

scholarly journals Layered double hydroxides as amendment for remediation of heavy metal ions in water and soil

2021 ◽  
Vol 51 (5) ◽  
pp. 493-508
Author(s):  
Fangqi Mao ◽  
Peipei Hao ◽  
Xianggui Kong ◽  
Xiaodong Lei ◽  
Xue Duan
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Layered Double Hydroxides ◽  
Heavy Metal Ions ◽  
Double Hydroxides

Layered silicate RUB-15 for efficient removal of UO22+ and heavy metal ions by ion-exchange

2017 ◽  
Vol 4 (9) ◽  
pp. 1851-1858 ◽  
Author(s):  
Zhe Chen ◽  
Yu Liang ◽  
Dashuang Jia ◽  
Wanying Chen ◽  
Zhimin Cui ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Ion Exchange ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Layered Silicate ◽  
High Adsorption ◽  
Efficient Removal

Layered silicate RUB-15 exhibited high adsorption abilities for not only UO22+ but also heavy metal ions through ion-exchange.

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

Effects of Feed Water Conditions on Performance of Electrodeionization Process for Removal of Ni2+ from Dilute Solution

2012 ◽  
Vol 502 ◽  
pp. 174-178
Author(s):  
Hui Xia Lu ◽  
Shao Feng Bu ◽  
Jian You Wang
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Water Reuse ◽  
Heavy Metal Ions ◽  
Pure Water ◽  
Synthetic Wastewater ◽  
Feed Water ◽  
Separation Performance ◽  
Water Conditions ◽  
And Diffusion

Electrodeionization (EDI) is being applied more and more to treat wastewater containing heavy metal ions, especially for electroplating rinsing wastewater. The effects of feed water conditions including concentration, pH and temperature on the performance of EDI process for removal of Ni2+ from dilute synthetic wastewater were investigated systematically in this paper. It was found that the dilute resistivity of the EDI module descended from 1.5-2.8MΩ•cm to 0.36-0.45MΩ•cm while the influent Ni2+ concentration increased from 45 mg•L-1to 63mg•L-1. Existence of some H+ in feed water would push the stack current up. An increase in temperature of feed water would facilitate the ion exchange and diffusion and thus promote mass transfer. It was indicated that feed water conditions had a significant effect on separation performance of EDI process for treating dilute solutions containing heavy metal ions. Pure water production could be accomplished and water reuse could be realized via EDI technology by appropriately restricting feed water conditions.

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.

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