Adsorption of Disperse Dyes from Wastewater Using Cationic Surfactant-modified Coffee Husk Biochar

  • Chatsuda Kosaiyakanon Department of Chemical Engineering, Faculty of Engineering, Prince of Songkla University, Hat-Yai, Songkhla, 90110
  • Suratsawadee Kungsanant ผู้ช่วยศาสตราจารย์ ภาควิชาวิศวกรรมเคมี คณะวิศวกรรมศาสตร์ มหาวิทยาลัยสงขลานครินทร์
Keywords: Adsorption, Disperse dyes, Coffee husk biochar


A solid agricultural waste, coffee husk, was applied as an adsorbent for disperse dye-polluted wastewater treatment. The coffee husk was pyrolyzed at 450°C and then chemically activated using 50 %wt ZnCl2 solution. The biochar was subsequently activated at 500°C under N2 blanket. The activated coffee husk biochar was then modified using a cationic surfactant, Cetyltrimethylammonium bromide. The modified coffee husk biochar (MCH) was applied for disperse dyes removal from synthetic wastewater. The selected disperse dyes were disperse yellow 3 (DDY3), disperse red 60 (DDR60), and disperse blue 56 (DDB56), respectively. The removal efficiency of DDY3 (79.5 %) was the highest, followed by DDR6 (23.2 %), and DDB56 (9.7 %), respectively. For DDY3 and DDB56, the adsorption kinetics was fit well by a pseudo-first order model and the adsorption isotherms matched well the Freundlich model. Besides, the adsorption kinetics of DDR60 was fit well by a pseudo-second order model and the adsorption isotherms matched well the Langmuir model. Additionally, the variation of pH in synthetic wastewater provided no effect on disperse dyes removal efficiency. Moreover, the disperse dye removal efficiency using MCH was similar to those of using activated carbon.


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Author Biography

Chatsuda Kosaiyakanon, Department of Chemical Engineering, Faculty of Engineering, Prince of Songkla University, Hat-Yai, Songkhla, 90110

อาจารย์ ประจำภาควิชาวิศวกรรมเคมี คณะวิศวกรรมศาสตร์

ม. สงขลานครินทร์

อ. หาดใหญ่ 

จ. สงขลา 



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