THE ADSORPTION PERFORMANCE and CHARACTERIZATION of THE ACTIVATED CARBON PRODUCED FROM PEPPER STALKS

H. Dolaş
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Abstract

This study presented the evaluation of the adsorption of Eriochrome Black T (EBT) on the activated carbon (trH-BS) produced from pepper stalk by activating with 50% phosphoric acid solution (H3PO4) and then by carbonizing at 650 oC for 30 min. in atmosphere of nitrogen (N2) was presented. The isotherm of trH-BS was Type IV, representing micro, meso and macroporous structures. The micropore volume and micropore surface area values of trH-BS were 0.39 cc/g and 1107.294 m2/g, respectively. Also, its meso and macropores had a volume of about 15-17 cc/g and an average surface area of 400 m2/g. The adsorption energy was 18.156 kJ/mol and the BET surface area was 756.257 m2/g. The structure of trH-BS was clarified structurally and morphologically and the formations like nano rod were seen at Scanning Electron Microscopy (SEM) images. By using trH-BS, the adsorption of EBT from the aqueous medium was investigated using 5 different parameters. As a result, it was found that the adsorbents obtained from pepper stalks are suitable for use in EBT adsorption with a ratio of about 50% under suitable conditions.
辣椒秸秆活性炭的吸附性能及表征
采用50%磷酸(H3PO4)活化后,在氮气(N2)气氛下于650℃下炭化30 min,考察了Eriochrome Black T (EBT)对辣椒秸秆活性炭的吸附性能。trH-BS等温线为IV型,分别代表微孔、介孔和大孔结构。trH-BS的微孔体积和微孔表面积分别为0.39 cc/g和1107.294 m2/g。中孔和大孔的体积约为15 ~ 17 cc/g,平均表面积为400 m2/g。吸附能为18.156 kJ/mol, BET表面积为756.257 m2/g。通过扫描电镜(SEM)对trH-BS的结构和形态进行了澄清,并观察到纳米棒状结构。采用trH-BS,研究了5种不同参数对EBT的吸附效果。实验结果表明,在适宜的条件下,辣椒秸秆吸附剂的吸附比约为50%,可用于EBT吸附。
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