Spectroscopic Studies of Dextrin Adsorption onto Colloidal ZnS

✍ Scribed by Rune Gärd; Allan Holmgren; Willis Forsling

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 172 KB
• Volume: 194
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1997.5090

✦ Synopsis

after 48 h at 130ЊC). All other chemicals were of analytical The interaction of dextrin with colloidal ZnS has been investigrade. gated through adsorption studies and FT-IR spectroscopy in the 4000-400 cm 01 range. The adsorption capacity is estimated to be Sample Conditioning around 1 mg/m 2 . Maximum adsorption is found to be constant below pH Ç7 and to increase with pH at least up to pH 11. Eighty

All experiments were performed at 25ЊC (thermostated percent of maximum adsorption is achieved within 3 min after room).

addition of the dextrin. Based upon FT-IR studies and titration

ZnS was precipitated by mixing 0.10 M ZnCl 2 and 0.10 data, an adsorption mechanism is proposed. ᭧ 1997 Academic Press M Na 2 S solutions. NaCl (0.10 M) was used as ionic medium throughout this investigation (the NaNO 3 that was first used was soon replaced by NaCl since the nitrate ions were found