摘要
以废弃茶渣(Tea Waste,TW)为原料,在不同温度(300,500,700和900℃)下热解制备茶渣生物炭(TW300、TW500、TW700和TW900),通过BET、元素分析、XRD、FTIR、XPS及Raman等表征探究生物炭理化性质差异和对废水中四环素(Tetracycline,TC)的吸附性能。结果显示:随着热解温度上升,茶渣生物炭的比表面积和孔体积先增大后下降。高温下生物炭形成有序石墨碳结构,当热解温度达到700℃会在生物炭中形成微晶结构。有机官能团结果显示,生物炭中C=O和C=C等不饱和芳香族会随着热解温度升高逐渐减少,逐渐形成以苯环为主的石墨烯结构,表明提高热解温度可以提高生物炭的石墨化程度和芳香性。
This article uses tea waste(TW)as raw material to prepare biochar(TW300,TW500,TW700 and TW900)at different pyrolysis temperatures(300,500,700 and 900℃).The biochar was characterized by BET,elemental analysis,XRD,XPS,and Raman,the adsorption performance of biochar on tetracycline(TC)in wastewater was investigated.The results showed that as the pyrolysis temperature increased,the specific surface area and pore volume of tea residue biochar first increased and then decreased.At high temperatures,biochar is prone to forming ordered graphite carbon structures.When the pyrolysis temperature reaches 700℃,microcrystalline structures are formed in biochar.The results of organic functional groups show that unsaturated aromatic groups such as C=O and C=C in biochar gradually decrease with the increase of pyrolysis temperature,gradually forming a graphene structure dominated by benzene rings,indicating the carbon structure defects of biochar began to gradually reduce,improving its graphitization degree and aromaticity.
作者
蔡国飞
李斌
Cai Guofei;Li Bin(Jiangsu Nanda-Huaxing Science and Technology of Environmental Protection Co.,Ltd.,Yancheng 224000,China;Chizhou Nanhuan Environmental Protection Technology Co.,Ltd.,Chizhou 247200,China)
出处
《山东化工》
CAS
2024年第5期51-53,56,共4页
Shandong Chemical Industry
关键词
茶渣
热解温度
生物炭
理化性质
吸附
tea waste
pyrolysis temperature
biochar
physical/chemical properties
adsorption
