Abstract
Previously known biogenic stimulator humic acid (HA) was the subject of this current study and HA based new remediation was developed by addition of silver (Ag) nanoparticles in its macromolecule. Extracted HA from a healing mud was characterized and used as reducing agent for Ag ion as well as a stabilizer for the formed Ag nanoparticles. The properties of the obtained hybrid composite were examined by XRD, UV and FTIR spectroscopic techniques. The diameter of the nanoparticles in the HA polymer was up to 8.6 nm and they were identified to be metallic Ag.DOI: http://dx.doi.org/10.5564/mjc.v13i0.151 Mongolian Journal of Chemistry Vol.13 2012: 7-11
Highlights
Aromatic nucleus and functional groups in the humic acid (HA) molecule react with cell walls of organisms and with receptors in a derma; it shows a therapeutic effect by penetrating through tissues [1]
Its main structural skeleton is alkyl and polyfunctional groups attached to condensed aromatic rings, with polysaccharides and polypeptides associated into it
We found efficient HA purification from clay particles using the nuclear filter and its ash content was negligible
Summary
Aromatic nucleus and functional groups in the HA molecule react with cell walls of organisms and with receptors in a derma; it shows a therapeutic effect by penetrating through tissues [1]. HA is a major proportion of organic matters in Mongolian healing mud [2] and it tends to form an organomineral particles. A hypothesis, was developed that HA may possess a stabilizing character for metal nanoparticles as other natural polymers do [3,4] and such behaviour has been recently investigated [5]. Humic substances from the healing mud differ from coal, turf and soil derived counterparts by their low molecular weight and high content of reactive functional groups [6]. The formation of Ag nanoparticiples in a variety of polymers (e.g., natural and syntetic) has been examined as size and dispersion pattern of metal particles were unique for each case. Akaihge et al examined the formation of Ag nanoparticle in the presence of HA (i.e, from the fresh water and marine sediment) under environmentally relevant conditions (e.g., concentration, pH and temperature), and discussed the possible formation by the natural processes and their stability depending on HA
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