Fast and robust lead (II) removal from water by bioinspired amyloid lysozyme fibrils conjugated with polyethyleneimine (PEI)

Protein nanofibrils for next generation sustainable water purification

“…To resolve this issue, lysozyme nanofibrils can be decorated by grafting various functional species to enhance their selectivity for the target metal in water. For instance, with the aim of fast and robust lead removal from water, lysozyme nanofibrils were conjugated with long-chain polyethyleneimine (PEI) via a green route and using a mussel-inspired polydopamine (PDA) interface coating 46 . The resulting fibrous composites had a high surface-to-volume morphology, which enabled a rapid water purification from lead in 2 min.…”

“…The continuous application of the adsorbent revealed that by using 1 kg of modified nanofibrils, ~12 m 3 of lead contaminated water (Pb (II) concentration of 1 ppm) could be purified to the levels below the WHO drinking water threshold value. Furthermore, the exhausted hybrid adsorbent could be easily regenerated and again reused for removing lead with negligible capacity loss 46 . The chemical modifications of lysozyme nanofibrils was also carried out by conjugating ethylenediamine (ED) to improve their water purifying performance for Chromium 47 .…”

Removal of copper ions by functionalized biochar based on a multicomponent Ugi reaction

“…However, the removal of Cu(II) was increased by the formation of a precipitate at higher pH (pH > 5.5). 44 Since Cu(II) formed precipitates at higher pH values to affect the adsorption effect, and the adsorption performance was stable at pH 3.5-5.5, 4.5 was chosen as the optimal pH. 3.2.3.…”

Chemical–Electrochemical Process Concept for Lead Recovery from Waste Cathode Ray Tube Glass

“…A CRT is composed of two different types of glass, from which one is used for the funnel and neck sections, characterized by high levels of lead oxide and another used for the screen which is typically a non-leaded glass that contains high levels of barium oxide [ 8 ]. Recycling of lead from waste CRT glass is an important issue because lead is classified as a neurotoxin that can accumulate in the soft tissues and bones, causing serious health issues [ 9 , 10 , 11 ]. The high content of lead oxide (23%) in CRT funnel glasses is an important factor that limits its landfill storage and the recycling process, as result many states have passed bans on putting CRTs in landfills or incinerators [ 12 , 13 ].…”