Application of Nanoparticles in Environmental Cleanup: Production, Potential Risks and Solutions

Improvement of zero valent iron nanoparticles by ultrasound-assisted synthesis, study of Cr(VI) removal and application for the treatment of metal surface processing wastewater

“…The iron (III) reduction leading to Fe 0 nanoparticles and to dihydrogen through the hydride oxidation can be described by the following equation (1): 4 Fe 3+ + 3 BH4 -+ 9 H2O = 6 H2 + 4 Fe° + 3 B(OH)3 + 9 H + ……. (1) According to this reaction, acidity is produced during the reduction. However, the measured final pH after the synthesis of iron nanoparticles was about 8.…”

“…Zero-Valent Iron (ZVI or Fe(0)) is the most commonly used zero-valent metal for environmental remediation [1]. Since the early 1990s, this reducing agent has been used to remediate a wide variety of organic and inorganic contaminants present in various environmental media (ground and surface waters, soils) [2][3].…”

Green sulfidated iron oxide nanocomposites for efficient removal of Malachite Green and Rhodamine B from aqueous solution

“…Nanomaterials as adsorbents, have attracted considerable attraction because of their larger specific surface areas, welldefined shapes, and manageable size. Iron nanoparticles (including zero-valent iron and iron oxide nanoparticles) have been extensively applied in environmental remediation with their distinctive physical and chemical characteristics, great specific surface areas, high reaction activity and abundant raw material sources (Handojo et al 2020;Bounab et al 2021;Golabiazar et al 2021). However, due to its slow removal rate of some pollutants, narrow range of active pH value (Bounab et al 2021), easy agglomeration and other problems, researchers focus more on iron nanoparticles modification to overcome its shortcomings.…”

High removal of toxic crystal violet dye using a thermally treated activated carbon fiber felt

“…Many approaches have been used to achieve the elimination of dyes from water bodies, among which the following stand out: anodization and electrocoagulation (El-Ashtoukhy et al, 2017;Singh et al, 2016), micro remediation (Lira-Pérez J et al, 2019, microwave (Garzón-Pérez et al, 2020), ultrasonic, nanofiltration with modified membranes (Febrianto et al, 2019;Mittal et al, 2020;Febrianto et al, 2019;Gunawan et al, 2019;Sutedja et al, 2017), ultraviolet (Ayala et al, 2017), ozonation (Mendoza-Basilio et al, 2017), sedimentation (Solís et al, 2013), electro incineration, chemical coagulation, enzymatic (Solís-Oba et al 2009), and different types of catalysis as: conventional catalytic processes (Raman and Kanmani, 2016), heterogeneous photocatalysis (Márquez-Ramírez et al, 2019;Lakshmi Prasanna and Rajagopalan, 2016), adsorption in batch (González-López et. al, 2021), piezocatalysis (Singh et al, 2020), remediation by nano zero-valent irons (Handojo et al, 2020) or a combination of the approaches. All they had been widely studied, but most of them are expensive or difficult to be reproduced in some labs.…”