New concept to remove heavy metals from liquid waste based on electrochemical pH-switchable immobilized ligands

Adsorption of Cr(VI) using silica-based adsorbent prepared by radiation-induced grafting

“…These heavy metal ions could not only lead to direct and indirect health risk of human beings but also disserve the whole ecosystem, as a result the removal of those toxic substance from industrial effluents has been becoming an urgent issue. By far many kinds of treatment techniques have been employed to solve this problem, for instance ion-exchange, reverse osmosis, precipitation, filtration, coagulation, electrolytic recovery and so on [1][2][3][4][5][6][7]. Such techniques, however, have many disadvantages that include high chemical cost, low removal efficiency, high-energy requirement and the generation of secondary toxic slurries.…”

Electrochemical analysis of copper ion using a Gly–Gly–His tripeptide modified poly(3-thiopheneacetic acid) biosensor

“…Environmental contamination by trace metals is a serious problem not only for ecosystems, but also for human health, as heavy metals accumulate at higher levels within the food chain (Pascal et al, 2007). This concern has resulted in an ever-increasing demand for reliable means of detecting metal contaminants in environmental matrices.…”

An ion selective electrode for mercury(II) based on mercury(II) complex of poly(4-vinyl pyridine)

“…The displacement has also been attributed to pyridine C-N stretching band by metal-N coordination [28]. The increase in absorbance at 1640 cm À1 corresponds to protonated or acidic form of pyridine (pyridinium NH + ) [29]. The increase in absorption of NH stretching band at 3450 cm À1 further confirms the bonding of the Hg 2+ with pyridine group [30].…”