Synthesis and evaluation of different thio-modified cellulose resins for the removal of mercury (II) ion from highly acidic aqueous solutions

• Published in: Journal of colloid and interface science Vol. 353; no. 2; pp. 593 - 597
• Main Authors: Takagai, Yoshitaka, Shibata, Atsushi, Kiyokawa, Shigemi, Takase, Tsugiko
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Inc 15-01-2011; Elsevier
• Subjects: Acidic solution; Adsorption; aluminum; amines; Aqueous solutions; arsenic; cadmium; Cellulose; chemical concentration; Chemistry; chromium; cobalt; copper; Exact sciences and technology; General and physical chemistry; ions; iron; lead; manganese; Mercury; Mercury ion; metal ions; nickel; Nitric acid; phenols; platinum; Polymers; Recovery; Removal; Resins; ruthenium; silver; Surface physical chemistry; thiols; zinc; Mercury ion; Removal; Adsorption; Acidic solution; Cellulose; Mercury II; Adsorption capacity; Metal ion; Selectivity; Ruthenium II; Recovery; Nitric acid; Amine; Synthesis; pH; Aqueous solution; Resins; Modified material
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2010.09.070

The present resins
o-benzenedithiol- and
o-aminothiophenol-modified cellulosic resins were found to be very effective in removing mercury (II) ion from strongly acidic media.
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► Thio- and/or amine-modified cellulose resin materials were synthesized. ► Hg(II) ion adsorption properties in highly acidic solution were determined. ► Selectivity for Hg(II) as only ruthenium(II) somewhat adsorbed onto it out of 14 other metal ions studied.
Seven different types of thio- and/or amine-modified cellulose resin materials were synthesized and their mercury (II) ion adsorption properties determined. All seven resins showed good mercury (II) adsorption capability in the more neutral pH regions. However, the
o-benzenedithiol- and
o-aminothiophenol-modified cellulosic resins were found to be very effective in removing mercury (II) ions from strongly acidic media. For example, 93.5–100% mercury (II) ion recoveries from very acid aqueous solutions (nitric acid concentration ranged from 0.1 to 2.0
mol/L) were obtained using the
o-benzenedithiol-modified resin while recoveries ranged from ca. 50% to 60% for the
o-aminothiophenol-modified resin. An adsorption capacity of 23
mg (as Hg atoms) per gram of resin was observed for the
o-benzenedithiol-modified cellulose in the presence of 1.0
mol/L nitric acid. This same resin shows very good selectivity for mercury (II) as only ruthenium (II) also somewhat adsorbed onto it out of 14 other metal ions studied (Ag
+, Al
3+, As
3+, Co
2+, Cd
2+, Cr
3+, Cu
2+, Fe
3+, Mn
2+, Ni
2+, Pt
2+, Pb
2+, Ru
2+, and Zn
2+).