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http://dx.doi.org/10.17137/korrae.2016.24.3.15

Characteristics of Desorption and Recycling Capacity for Previously Adsorbed Silver into Waste Coffee Grounds  

Jeon, Choong (Department of Biochemical Engineering, Gangneung-Wonju National University)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.24, no.3, 2016 , pp. 15-21 More about this Journal
Abstract
This experiment was conducted to test desorption and recycling characteristics for silver ion adsorbed into waste coffee grounds by using various desorbing agents such as nitric acid, ethylene diamine triacetic acid (EDTA) and nitrilo triacetic acid (NTA). It is appeared that the highest desorption efficiency for silver ions was obtained as about 97.8 % by 1.0 M of nitric acid solution. Also, in the case of less than 1.0 of the ratio of solid and liquid (S/L) (g/L), silver ions adsorbed onto coffee grounds was desorbed as about 98~100 %, and most of desorption process was completed within 60min. In addition, adsorption capacity of reused waste coffee grounds for silver ions was highly maintained as about 43.9 mg/g until the $2^{nd}$ cycle, as compared with the adsorption capacity with 45.9 mg/g of the adsorption capacity for virgin waste coffee grounds.
Keywords
Desorption; Silver ion; Nitric acid; Coffee grounds; Regeneration;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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