Nanoparticle-based strategies for detection and remediation of environmental pollutants

Abstract

Sensitive detection and efficient removal of an increasing number of persistent and emerging environmental pollutants are major challenges in our industrialized world. Now these challenges can be better answered by utilizing the advantages of nanotechnology in addition to traditional methods. Due to unique features of nanomaterials, such as size, surface area, adsorptivity, photoelectronic, and photocatalytic properties, they have emerged to be important materials in the analytical detection and remediation of environmental pollutants.

Chitosan film loaded with silver nanoparticles—sorbent for solid phase extraction of Al(III), Cd(II), Cu(II), Co(II), Fe(III), Ni(II), Pb(II) and Zn(II)

“…Metal and metal oxide nanoparticles due to their unique optical, electrical, adsorptive, catalytic and magnetic properties as well as, high surface-to-volume ratio, have emerged as powerful adsorbents for environmental remediation's (Y. Liu, Su, Zhang, Jiang, & Yan, 2011;Pradeep, 2009;Ray Phoebe, 2015) or as sorbents for environmental and biological sample preparation steps, for sensing, detection and speciation of toxic elements and organic contaminants (Dastafkan, Khajeh, Ghaffari-Moghaddam, & Bohlooli, 2015;Jiang et al, 2012;Liang & Guo, 2009;Ligler & White, 2013;Lucena, Simonet, Cárdenas, & Valcárcel, 2011;Pierce & Zhao, 2010;Valentini & Palleschi, 2008;Xu, Qi, Li, Bai, & Liu, 2015). However their low mechanical strength and low chemical resistance limit their practical application and complicate applied analytical procedures.…”

Enhanced Production, Purification and Characterization of Alkaline Keratinase from <i>Streptomyces minutiscleroticus </i>DNA38

“…Optimization of physicochemical and nutritional variables, employing one at a time experimental protocol [18] was followed for the production of keratinase. Initial pH (7.0 to 9.0 with an increment of 0.5), inoculum size (1X10 5 to 1X10 9 with an increment of 1X10 1 ), incubation temperature (30 to 50 °C with an increment of 5 ºC), agitation speed (150 to 250 rpm with an increment of 25rpm), carbon sources (Starch, glucose, sucrose, maltose and sucrose, from 0.2 to 1.0 % with an increment of 0.2%), nitrogen sources (beef extract, casein, yeast extract and chicken feathers from 0.2 to 1.0 % with an increment of 0.2%) and mineral salts (CuSO 4 , MgSO 4 , FeSO 4 , MnSO 4 and K 2 HPO 4 from 0.01 to 0.05% with an increment of 0.01%) were optimized manually for the production of keratinase.…”

Comparative studies on Ag3PO4/BiPO4–metal-organic framework–graphene-based nanocomposites for photocatalysis application

“…Therefore, the progression of cost-effective and environmentally friendly ways for the removal of toxic materials from both ground and underground water is recognized as one of the most intended goals and an arduous challenge. Within the past decades, advances in the semiconductor heterogeneous photocatalysts have attracted much more attention concentrated on the viewpoint of environmental pollution accountability [4][5][6].…”