Magnetic Porous Geopolymer: A Cheaper and Efficient Environmental Tool for Heavy Metal Sorption

Abstract

Sorption of heavy metals is a crucial controller method for environmental pollution. Contamination by heavy metals is one of the most critical and discussed environmental issue nowadays that fits in the context of bioaccumulation. Some examples of these contaminants are lead, cadmium, and chromium. In order to avoid increasing the level of these contaminants in rainwater networks, the Brazilian Council of Environment (CONAMA) establishes that it is essential that industries that produce effluents remove these metals before returning the effluent to the network. Given this, a new technology is proposed for the removal of heavy metals. A magnetic nanocomposite is produced by adding maghemite nanoparticles to an aluminosilicate matrix and subjected to heavy metal-contaminated effluents to sorption through this material. In order to evaluate the efficiency of removal of heavy metals by aluminosilicates, the effluents are analyzed by atomic absorption spectroscopy, and the results show a 99% sorption capacity. Finally, lethality tests, using Artemia salina, are performed. The best results are from the chromium and lead absorption tests.

A 30-Year Review on Nanocomposites: Comprehensive Bibliometric Insights into Microstructural, Electrical, and Mechanical Properties Assisted by Artificial Intelligence

“…The exploration of the nanoscopic world has brought nanocomposites to the forefront of research, signifying a breakthrough in multiple domains, including environmental recovery [ 23 , 34 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 ], electronics [ 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 ], energy storage [ 82 , 83 , 84 , 85 , 86 , 87 , 88 , 89 , 90 , 91 , 92 , 93 , 94 , 95 , 96 , 97 , 98 , 99 , 100 , 101 ], and healthcare [ 102 ,…”

“…The exploration of the nanoscopic world has brought nanocomposites to the forefront of research, signifying a breakthrough in multiple domains, including environmental recovery [23,34,[52][53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][69][70], electronics [71][72][73][74][75][76][77][78][79][80][81], energy storage [82][83][84][85][86][87][88][89][90][91][92][93][94][95][96][97][98][99][100]…”

Potentially toxic elements (PTEs) in Gomti-Ganga Alluvial Plain, associated human health risks assessment and potential remediation using novel-nanomaterials

“…The removal techniques for heavy metal contamination primarily include sorption (Pal et al, 2021 ; Rahmani-Sani et al, 2020 ), chemical precipitation (Pohl, 2020 ; Zhang & Duan, 2020 ), using filtration membrane (Azad & Mohsennia, 2020 ; Peng & Guo, 2020 ), catalytic degradation (Dayanidhi et al, 2020 ; Zhang et al, 2020 ), ion-exchange processes (Kobayashi et al, 2020 ; Park et al, 2020 ), solvent extraction (Halli et al, 2020 ; Pino et al, 2020 ), and oxidation–reduction reactions (Tofighy & Mohammadi, 2020 ; Xiao et al, 2020 ). Among all these methods, sorption is one of the most commonly accepted and used technique for removal of heavy metals owing to low operating cost, simple and eco-friendly operation, and easy regeneration methods for the adsorbents (Ke et al, 2021 ; Maranhão et al, 2021 ). However, with the advent of technology, the use of novel nanomaterials, demonstrating superior removal performance, is also increasing.…”

Oil Spill Sorber Based on Extrinsically Magnetizable Porous Geopolymer

“…Moreover, the use of magnetic fillers can also improve the sorption capability of these matrices. Magnetic nanoparticles are often used in application fields such as absorption, separation, sensing, and electromagnetic dissipation [6][7][8][9][10][11]. Ordinarily, geopolymers have been used to recover environments degraded by heavy metals [12].…”