不同酸处理燕麦秸秆对亚甲基蓝染料的吸附性能研究  

Study on the adsorption properties of methylene blue dye on oat straw treated with different acids

作　　者：吴磊 张宇辉 司杨 WU Lei;ZHANG Yuhui;SI Yang(Research Center of New Energy Photovoltaic Industry,Qinghai University,Xining 810016,China)

机构地区：[1]青海大学新能源光伏产业研究中心,青海西宁810016

出　　处：《青海大学学报》2022年第3期1-6,共6页Journal of Qinghai University

基　　金：青海省科学技术厅项目(2019-ZJ-7027);青海大学省部共建三江源生态与高原农牧业国家重点实验室自主课题(2020-ZZ-05)。

摘　　要：为探究酸活化剂与生物质碳材料预混阶段的形貌、化学官能团和润湿性能变化对染料吸附性能的影响,本研究以青海省丰富的燕麦秸秆为碳源,将其分别与浓盐酸、浓磷酸和浓硫酸预混处理后得到不同酸改性燕麦秸秆,用于吸附亚甲基蓝(MB)染料。通过场发射扫描电子显微镜(FE-SEM)、接触角测试和傅里叶红外光谱仪(FTIR)以及紫外可见分光光度法(UV-Vis)分别对制得的燕麦秸秆进行结构表征和吸附性能测试。结果表明:(1)不同酸处理燕麦秸秆表面的粗糙结构和裸露的含氧官能团使其具有丰富的键合位点及优异的吸附性能。(2)原燕麦秸秆的水接触角为65.63°,浓盐酸、浓磷酸和浓硫酸改性燕麦秸秆的水接触角分别增大至70.28°、86.96°和83.84°。研究结果可为不同酸改性燕麦秸秆对染料废水的吸附性能研究提供理论借鉴。Oat straw which is abundant in Qinghai province is taken as the carbon source in this study to explore the effects of the changes of morphology,chemical functional groups and wettability of acid activator and biomass carbon materials on the dye adsorption properties in the premixing stage.Oat straw is pretreated with concentrated hydrochloric acid,concentrated phosphoric acid and concentrated sulfuric acid respectively to obtain different acid modified oat straw which is applied to adsorb methylene blue( MB) dye.The structures and adsorption properties of oat straw are characterized by field emission scanning electron microscopy( FE-SEM),contact angle measurement,fourier transform infrared spectroscopy( FTIR) and ultraviolet visible spectrophotometry( UV-Vis).The results show that:( 1) The rough structure and exposed oxygen-containing functional groups on the surface of oat straw treated with different acids make it have rich bonding sites and excellent adsorption properties.( 2) The water contact angle of original oat straw is 65.63°,while that of the oat straw modified by concentrated hydrochloric acid,concentrated phosphoric acid and concentrated sulfuric acid increases to 70.28°,86.96° and 83.84° respectively.The results can provide a theoretical reference for the study of the adsorption properties of oat straw treated with different acids on dye wastewater.

关 键 词：生物质碳 燕麦秸秆 亚甲基蓝 染料废水 吸附性能 

分 类 号：X703[环境科学与工程—环境工程]