摘要
本文以废弃榴莲壳、龙眼壳为原料,采用KOH化学活化法制备了榴莲壳、龙眼壳生物质活性炭,并探究了其对水中亚甲基蓝的吸附性能。采用比表面积测试(BET)、傅立叶红外光谱(FT-IR)、电子扫描电镜(SEM)、X-射线衍射(XRD)对制备的榴莲壳、龙眼壳生物质活性炭进行了表征,并重点研究了活性炭添加量、亚甲基蓝溶液初始浓度、反应时间、温度和pH对其吸附亚甲基蓝(MB)的影响。结果表明:200 mg/L MB水溶液在最佳反应条件(炭投入量为30 mg、pH8.0、120 min)下,榴莲壳(龙眼壳)活性炭最大吸附量为363 mg/g;榴莲壳和龙眼壳活性炭的比表面积分别为999.63 m^(2)/g和1377.95 m^(2)/g,平均孔径分别为2.13 nm和2.20 nm,另外榴莲壳、龙眼壳活性炭表面均有大量孔洞且具有一定的层状结构,这些孔洞的存在为活性炭吸附提供了丰富的吸附位点,与市售商用活性炭相比,具有更加密集的孔状结构,并且对亚甲基蓝的吸附能力更强。
Biomass activated carbon was prepared from discarded durian shell and longan shell by KOH chemical activation method,and their adsorption capacity of methylene blue(MB)in water was also investigated.The surface area test(BET),Fourier infrared spectroscopy(FT-IR),scanning electron microscopy(SEM)and X-ray diffraction(XRD)were used to characterize the prepared biomass activated carbon,and the effects of activated carbon amount,initial concentration of MB solution,reaction time,temperature and pH on the adsorption of MB were studied.Results indicated that the maximum adsorption capacity of durian shell(longan shell)activated carbon was 363 mg/g under the optimum conditions(initial MB solution concentration of 200 mg/L,carbon amount of 30 mg,pH8.0,120 min).The specific surface area of durian shell and longan shell activated carbon were 999.63 m^(2)/g and 1377.95 m^(2)/g,respectively,and their average pore sizes were 2.13 nm and 2.20 nm,respectively.In addition,the surface of durian shell and longan shell activated carbon had a large number of pores and a certain laminar structure.The existence of these pores provides rich adsorption sites for activated carbon adsorption,and compared with commercially available activated carbon,it has a more dense pore structure and has a stronger adsorption capacity for methylene blue.
作者
陈淇
程婷
肖更生
张玲
段邓乐
白卫东
曾晓房
董浩
CHEN Qi;CHENG Ting;XIAO Gengsheng;ZHANG Ling;DUAN Dengle;BAI Weidong;ZENG Xiaofang;DONG Hao(College of Light Industry and Food Science,Zhongkai University of Agriculture and Engineering,Guangzhou 510000,China;Guangdong Provincial Key Laboratory of Lingnan Specialty Food Science and Technology,Zhongkai University of Agriculture and Engineering,Guangzhou 510225,China;Key Laboratory of Green Processing and Intelligent Manufacturing of Lingnan Specialty Food,Ministry of Agriculture,Guangzhou 510225,China;College of Biological and Food Engineering,Guangdong University of Petrochemical Technology,Maoming 525000,China)
出处
《食品工业科技》
CAS
北大核心
2023年第15期46-54,共9页
Science and Technology of Food Industry
基金
广东省岭南特色食品科学与技术重点实验室项目(2021B1212040013)
广东省驻镇帮镇扶村农村科技特派员团队(KTP20210224)
广东省联合培养研究生示范基地项目(仲恺农业工程学院-广州质量监督检测研究院)
仲恺农业工程学院示范性实践教学基地项目(仲恺农业工程学院-广州市食品检验所实践教学基地)。
关键词
榴莲壳
龙眼壳
活性炭
亚甲基蓝
活性炭表征
durian shell
longan shell
activated carbon
methylene blue
activated carbon characterization
