ประสิทธิภาพของถ่านกัมมันต์ที่เตรียมจากกากขี้แป้งของโรงงานน้ำยางข้นในการกำจัดสีย้อมในน้ำเสียสังเคราะห์ / เพ็ญลักษณ์ เทศสุวรรณ = Efficiency of activated carbon prepared from lutoid of rubber latex industry for the removal of dyes in synthetic wastewater / Penlak Tessuwan
The objective of this research compared the dyes removal efficiency from synthetic wastewater by activated carbon prepared from lutoid of rubber latex industry with the commercial activated carbon. Lutoid activated carbon was activated by zinc chloride. In this research, iodine number, physical characteristic, Freundlich adsorption isotherm and column adsorption test were studied. The column adsorption test used a down-flow column with 2.5 cm.diameter and 3 l/h flow rate and sampling at 30, 60 and 90 cm.depth. The result of this research revealed that preparation of lutoid activated carbon by a ratio of 1:1 of raw material to zinc chloride and activated 500 ํC was the highest iodine number and surface area ,547.31 +- 3.18 mg/g and 583.54 m[superscript 2]/g respectively. Freundlich adsorption isotherm test with synthetic wastewater showed that lutoid activated carbon can adsorbed direct dye, reactive dye, disperse dye and acid dye at 14.40, 13.31, 2.42 and 48.02 mg/g respectively. The commercial activated carbon adsorbed dye better than lutoid activated carbon. It can adsorbed direct dye, reactive dye, disperse dye and acid dye at 73.03, 16.19, 18.62 and 2,171.89 mg/g respectively. The column test with synthetic and textile wastewater at 30, 60 and 90 cm.depth found that lutoid activated carbon adsorbed direct dye at 125.85, 111.86 and 92.76 BV, reactive dye at 323.13, 196.61 and 131.22 BV, disperse dye at 61.22, 30.51 and 61.09 BV, acid dye at 605.44, 301.69 and 201.36 BV and textile wastewater at 527.21, 262.71 and 175.34 BV. respectively. However, the lutoid activated carbon had a problem when it was used because it was very fine so it should be developed for using easier.