Abstract：
:The aim of the paper was to investigate the ability of an eco-friendly luminescent xerogel prepared by chitosan crosslinking with a phenothiazine luminogen to detect and remove heavy metals. Its ability to give a divergent morphological and optical response towards fifteen environmental relevant metals was investigated by naked eye and UV lamp, fluorescence spectroscopy and scanning electron microscopy. A distinct response was noted for mercury, consisting in the transformation of the xerogel into a rubber-like material accompanied by the red shifting of the color of emitted light from yellow-green to greenish-yellow domain. The particularities of the metals anchoring into the xerogel were analyzed by FTIR spectroscopy and X-ray diffraction. The morphological changes and the metal uptake were analyzed by SEM-EDAX, swelling and gravimetric methods. It was concluded that mercury has a superior affinity towards this heteroatoms rich system, leading to a secondary crosslinking. This directed a great absorption capacity of 1673 mg/g and a specific morphological response for mercury ion concentrations up to 0.001 ppm.
journal_name
Int J Biol Macromoljournal_title
International journal of biological macromoleculesauthors
Bejan A,Doroftei F,Cheng X,Marin Ldoi
10.1016/j.ijbiomac.2020.07.232subject
Has Abstractpub_date
2020-11-01 00:00:00pages
1839-1848eissn
0141-8130issn
1879-0003pii
S0141-8130(20)33994-5journal_volume
162pub_type
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