scholarly journals Heavy Metal Adsorption Using Magnetic Nanoparticles for Water Purification: A Critical Review

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7500
Author(s):  
Christos Liosis ◽  
Athina Papadopoulou ◽  
Evangelos Karvelas ◽  
Theodoros E. Karakasidis ◽  
Ioannis E. Sarris
Keyword(s):  
Heavy Metal ◽  
Magnetic Nanoparticles ◽  
Adsorption Capacity ◽  
Water Purification ◽  
Metal Ion ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Desorption Process ◽  
Potential Applications ◽  
Modified Magnetic Nanoparticles

Research on contamination of groundwater and drinking water is of major importance. Due to the rapid and significant progress in the last decade in nanotechnology and its potential applications to water purification, such as adsorption of heavy metal ion from contaminated water, a wide number of articles have been published. An evaluating frame of the main findings of recent research on heavy metal removal using magnetic nanoparticles, with emphasis on water quality and method applicability, is presented. A large number of articles have been studied with a focus on the synthesis and characterization procedures for bare and modified magnetic nanoparticles as well as on their adsorption capacity and the corresponding desorption process of the methods are presented. The present review analysis shows that the experimental procedures demonstrate high adsorption capacity for pollutants from aquatic solutions. Moreover, reuse of the employed nanoparticles up to five times leads to an efficiency up to 90%. We must mention also that in some rare occasions, nanoparticles have been reused up to 22 times.

scholarly journals Heavy metal removal applications using adsorptive membranes

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Thi Sinh Vo ◽  
Muhammad Mohsin Hossain ◽  
Hyung Mo Jeong ◽  
Kyunghoon Kim
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Ceramic Membranes ◽  
Desorption Process ◽  
Chemical Structures ◽  
Advantages And Disadvantages

AbstractWater is a significant natural resource for humans. As such, wastewater containing heavy metals is seen as a grave problem for the environment. Currently, adsorption is one of the common methods used for both water purification and wastewater treatment. Adsorption relies on the physical and chemical interactions between heavy metal ions and adsorbents. Adsorptive membranes (AMs) have demonstrated high effectiveness in heavy metal removal from wastewater owing to their exclusive structural properties. This article examines the applications of adsorptive membranes such as polymeric membranes (PMs), polymer-ceramic membranes (PCMs), electrospinning nanofiber membranes (ENMs), and nano-enhanced membranes (NEMs), which demonstrate high selectivity and adsorption capacity for heavy metal ions, as well as both advantages and disadvantages of each one all, are summarized and compared shortly. Moreover, the general theories for both adsorption isotherms and adsorption kinetics are described briefly to comprehend the adsorption process. This work will be valuable to readers in understanding the current applications of various AMs and their mechanisms in heavy metal ion adsorption, as well as the recycling methods in heavy ions desorption process are summarized and described clearly. Besides, the influences of morphological and chemical structures of AMs are presented and described in detail as well.

Pillararenes as macrocyclic hosts: a rising star in metal ion separation

2019 ◽  
Vol 55 (55) ◽  
pp. 7883-7898 ◽  
Author(s):  
Lixi Chen ◽  
Yimin Cai ◽  
Wen Feng ◽  
Lihua Yuan
Keyword(s):  
Heavy Metal ◽  
Metal Ion ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Supramolecular Materials ◽  
Feature Article ◽  
Ion Separation

This feature article reviews the development of functionalized pillararenes as supramolecular materials for lanthanide and actinide separation and heavy metal removal.

Potential of Agricultural Waste Material (Ananas cosmos) as Biosorbent for Heavy Metal Removal in Polluted Water

2020 ◽  
Vol 1010 ◽  
pp. 489-494
Author(s):  
Abdul Hafidz Yusoff ◽  
Rosmawani Mohammad ◽  
Mardawani Mohamad ◽  
Ahmad Ziad Sulaiman ◽  
Nurul Akmar Che Zaudin ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Adsorption Capacity ◽  
Metal Removal ◽  
Low Cost ◽  
Agricultural Waste ◽  
Heavy Metal Removal ◽  
Polluted Water ◽  
Maximum Adsorption Capacity ◽  
Pineapple Peel

Conventional methods to remove heavy metals from polluted water are expensive and not environmentally friendly. Therefore, this study was carried out to investigate the potential of agricultural waste such as pineapple peel (Ananas Cosmos) as low-cost absorbent to remove heavy metals from synthetic polluted water. The results showed that Cd, Cr and Pb were effectively removed by the biosorbent at 12g of pineapple peels in 100 mL solution. The optimum contact time for maximum adsorption was found to be 90 minutes, while the optimum pH for the heavy metal’s adsorption was 9. It was demonstrated that with the increase of adsorbent dosage, the percent of heavy metals removal was also increased due to the increasing adsorption capacity of the adsorbent. In addition, Langmuir model show maximum adsorption capacity of Cd is 1.91 mg/g. As conclusions, our findings show that pineapple peel has potential to remove heavy metal from polluted water.

Efficient heavy metal ion removal by triazinyl-β-cyclodextrin functionalized iron nanoparticles

RSC Advances ◽  
2015 ◽  
Vol 5 (110) ◽  
pp. 90602-90608 ◽  
Author(s):  
Amir Abdolmaleki ◽  
Shadpour Mallakpour ◽  
Sedigheh Borandeh
Keyword(s):  
Heavy Metal ◽  
Aqueous Solutions ◽  
Metal Ion ◽  
Iron Nanoparticles ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Heavy Metal Ion Removal ◽  
Nano Adsorbent

A novel magnetic nano-adsorbent containing Fe3O4 nanoparticles functionalized with MCT-β-CD was fabricated and exhibited a remarkable enhancement in heavy metal removal efficiency from aqueous solutions.

scholarly journals Competitive adsorption and mechanism of hexahydroxy metallic system by aminated solution-blown polyacrylonitrile micro/nanofibers

2021 ◽  
Author(s):  
Huiqing Lou ◽  
Siyu Li ◽  
Xiangwei Feng ◽  
Xianzhong Cao
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Adsorption Capacity ◽  
Metal Ion ◽  
Metal Removal ◽  
Interactive Effect ◽  
Maximum Adsorption Capacity ◽  
Coupling Mechanism ◽  
Metal System ◽  
Metallic System

Abstract Adsorptive properties for Cd(II), Cr(III), Cu(II), Ni(II), Pb(II) and Zn(II) onto an amidoxime-functionalized polyacrylonitrile (APAN) micro/nanofibers were systematically investigated in hexahydroxy metallic solution system using batch experiments. The interactive effect of multi-metal ions in multi- metal systems was antagonistic in nature, and the adsorption capacity in multi-metal system was lower than that in single-metal system. The Langmuir isotherm model could explain respectively the isotherm and kinetic experimental data for hexahydroxy metallic system with much satisfaction. The maximum adsorption capacity in hexahydroxy metallic for Cd(II), Cr(III), Cu(II), Ni(II), Pb(II) and Zn(II) was calculated to be 98 mg/L, 158 mg/L, 80 mg/L, 76, 312 and 58 mg/L individually. The APAN micro/nanofibers possessed good selectivity toward Pb(II) and Cr(III), over Cd(II), Cu(II), Ni(II), and Zn(II), having the highest selectivity coefficients at 17.52 and 6.07 in the test range. The five adsorption-desorption cycle experiments exhibited that APAN micro/nanofibers adsorbent are readily reusable, and have potential for heavy metal removal from wastewater. The adsorption behavior in multi-metal systems was shown to be complex, including surface complexation, antagonistic competition and displacement reactions. The diversity and selectivity in metal ion adsorption onto the micro/nanofibers relate mainly to the stability constants, and the microscopic coupling mechanism between the heavy metal ions and the functional groups on the fiber surface. This interaction mechanism between the favorable component and other metal ions could contribute significantly to the direct displacement impact illustrated schematically.

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