About this Research Topic
Environmental pollution is one of the most important problems worldwide. In particular, the pollution of aquatic ecosystems is causing considerable attention due to the harmful effects on human health and living organisms. The increasing contamination is due to a wide range of micropollutants, such as pesticides, dyes, personal care products, pharmaceuticals and drugs, heavy metals and so on. This class of emerging contaminants have been found not only in sewage discharge, but also in ground, surface and drinking water at concentration from few ng/L-1 to several μg/L-1. Many of these contaminants, even if present in traces, can cause ecological and health damage due to their high toxicity, solubility and stability in aqueous media and the possibility of bioaccumulation. Various processes have been proposed to remove pollutants from water systems, based on the nature of the contaminants: photocatalysis, electrochemical treatments, chemical precipitation, ion exchange, adsorption, coagulation-flocculation, membrane filtration, bioremediation. Of all these methods, adsorption appears to be one of the most efficient techniques due to easy adjustment for different targets, versatility in design, low cost and recyclability for multiple re-use. Much effort has been made to develop highly selective, non-toxic and biocompatible adsorbent materials.
Polyamidoamines are synthetic, linear, branched, iperbranched or dendrimeric polymers containing amide groups and tertiary amine units regularly arranged and generally obtained by adding amines to acrylamides. This is known as aza-Michael addition and is considered a green and sustainable reaction due to the use of water as a solvent, mild temperature conditions and the absence of added catalysts. Polyamidoamines are environmentally friendly, biocompatible and highly functional polymers, that can be further functionalized depending on the groups present on the reactant amines. In this way it is possible to design countless polymeric structures suitable for the most disparate applications such as sensors, the intracellular transport of drugs and proteins and above all in the environmental field, the removal of pollutants from water.
Polyamidoamine in free-linear, cross-linked, branched, iperbranched or dendrimeric forms are able to adsorb molecules through Van der Waals interactions as well as coordinate transition metal ions, depending on the chemical functionalization. These premises suggest the use of polyamidoamines as materials for application in the remediation of water pollution.
We welcome Original Research articles, Reviews, Mini-Reviews and Communication articles on themes included, but not limited to:
• Synthesis and characterization of novel polyamidoamines
• Novel, sustainable synthetic routes for the synthesis of polyamidoamines
• Modifications of structural features of polyamidoamines for the fine-tuning of properties
• Functionalization of polyamidoamines: chemical modifications to create selective adsorbents for target molecules, ions, nanoparticles
• Fabrication of novel polyamidoamines-based membranes, films, fibers, capsules, sponges, coatings and others with tuned features
• Use of novel polyamidoamines-based materials with 3D printing technology and applications for the removal of pollutants from wastewater
We widely encourage submissions of papers which relate to recent or advanced adsorption technologies using amidoamine polymer adsorbents for purification of wastewaters. Recycling technologies for the recovery of rare metals (or useful materials) from the aqueous phase using sustainable polyamidoamines based adsorbents can also be submitted to this Research Topic.
Keywords: polyamidoamines, synthesis, characterization, functionalization, wastewater
Important Note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.