• Advances in environmental research
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• 제4권1호
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• pp.25-38
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• 2015

Wastewaters of textile industry cause high volume colour and harmful substance pollutions. Photocatalytic degradation is a method which gives opportunity of reduction of organic pollutants such as dye containing wastewaters. In this study, photocatalytic degradation of C.I. Basic Yellow 28 (BY28) as a model dye contaminant was carried out using Degussa P25 in a photocatalytic reactor. The experiments were followed out at three different azo dye concentrations in a reactor equipped UV-A lamp (365 nm) as a light source. Azo dye removal efficiencies were examined with total organic carbon and UV-vis measurements. As a result of experiments, maximum degradation efficiency was obtained as 100% at BY28 concentration of $50mgL^{-1}$ for the reaction time of 2.5 h. The photodegradation of BY28 was described by a pseudo-first-order kinetic model modified with the langmuir-Hinshelwood mechanism. The adsorption equilibrium constant and the rate constant of the surface reaction were calculated as $K_{dye}=6.689{\cdot}10^{-2}L\;mg^{-1}$ and $k_c=0.599mg\;L^{-1}min^{-1}$, respectively.

• 자원리싸이클링
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• 제21권2호
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• pp.9-16
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• 2012

본 총설은 수 처리용으로 이용되는 여러 가지 종류의 농업부산물과 염료를 종합평가한 것이다. 염료로 인한 수질오염은 심각한 환경문제를 유발하고 있으나 적절한 기술과 장치는 물론, 수 처리제가 고가로 공급되어 수질관리에 어려움을 겪고 있다. 그에 따른 대체제로 최근에 농업부산물을 이용한 저가흡착제 개발에 높은 관심을 보이고 있는 가운데, 각종 농업부산물의 흡착기능을 조사하였다. 또한 활성탄을 대체할 만한 저가이면서 환경친화적인 염료폐수처리제 개발과 그 효용성을 연구하여 활성탄과 같은 흡착제의 대체가능성을 평가하였다.

• 한국염색가공학회지
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• 제5권4호
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• pp.42-48
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• 1993

In the present work, decoloring of acid dye solution by the diethylaminoethylated cellulosic adsorbents($CA_{DASE}$) was studied with the aim of developing polymeric adsorbents for the treatment of colored wastewaters. To prepare the cellulosic adsorbents, the $CA_{DASE}$ cellulose and polyvinyl alcohol mixture(80 wt% cellulose content) were crosslinked by tryacryloyl hexahydro-s-tryazine(TAHHT), ammonium phosphate and then treated with solutions containing sodium hydroxide and 2-diethylaminoethyl chloride. Batch and flow method were employed to determine decoloring capacity of C $A_{DEAE}$ for C.I.acid yellow 49. $CA_{DASE}$ exhibited much better desorption capacity than activated carbon. Furthermore, the exhausted $$CA{DASE} could be readily regenerated by washing with dilute sodium hydroxide.