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http://dx.doi.org/10.7584/ktappi.2015.47.1.066

The effect of bleaching reagents on bleachabilities of DIP and environmental loads  

Ahn, Chi-Deuk (Dept. of Forest Products & Biotechnology, College of Forest Science, Kookmin University)
Park, Jung-Yoon (Dept. of Forest Products & Biotechnology, College of Forest Science, Kookmin University)
Hwang, Sung-Jun (Dept. of Forest Products & Biotechnology, College of Forest Science, Kookmin University)
Hong, Seok-Jun (Dept. of Forest Products & Biotechnology, College of Forest Science, Kookmin University)
Lee, Jin-Hee (Dept. of Forest Products & Biotechnology, College of Forest Science, Kookmin University)
Kim, Hyoung-Jin (Dept. of Forest Products & Biotechnology, College of Forest Science, Kookmin University)
Chung, Sung-Hyun (KCCL)
Publication Information
Journal of Korea Technical Association of The Pulp and Paper Industry / v.47, no.1, 2015 , pp. 66-74 More about this Journal
Abstract
DIP(deinked pulp) was bleached by FAS, $Na_2S_2O_4$ and $H_2O_2$, which are widely used in DIP bleaching process, in order to improve optical properties of DIP, and the bleaching efficiencies of DIP and environmental loads of waste water were compared, depending on bleaching chemical dosages. With the application of different bleaching chemicals, some positive improvements were shown in optical and physical properties of bleached pulp. However, the physical properties of bleached DIP and their characteristics of wastewater were remarkably different, depending on dosages and bleaching reagents. DIP chemicals with FAS and $Na_2S_2O_4$ have higher improvement in optical and physical properties than $H_2O_2$. Also, environmental loads such as pH, turbidity, SCODcr and cationic demand were decreased in reductive bleaching process. Despite of higher effectiveness of reductive bleaching process, there were some environmental problems caused by sulfur ions from FAS and $Na_2S_2O_4$. With the method of sulfur ion controls, it would be more effective than $H_2O_2$ bleaching process.
Keywords
formamidine sulfinic acid; sodium dithionite; hydrogen peroxide; bleachability; environmental loads; deinked pulp;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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