竹基生物炭湿地基质对双酚A和磺胺甲恶唑的吸附特性研究  

The Adsorption Characteristics of Bisphenol A and Sulfamethoxazole onto Bamboo-Based Biochar Wetland Substrates

作　　者：张恒峰 Mawuli Dzakpasu 王晓昌[1,2] 郑于聪[1,2] ZHANG Hengfeng;MAWULI Dzakpasu;WANG Xiaochang;ZHENG Yucong(School of Environmental and Municipal Engineering,Xi'an University of Architecture and Technology;Key Laboratory of Northwest Water Resource,Environment and Ecology,MOE,Xi'an 710055,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院 [2]西北水资源与环境生态教育部重点实验室,陕西西安710055

出　　处：《水处理技术》2023年第4期67-72,77,共7页Technology of Water Treatment

基　　金：国家自然科学基金面上项目(51778522)。

摘　　要：以竹子为原料通过高温热解方法制备了竹基生物炭基质,并用于水中双酚A(BPA)和磺胺甲恶唑(SMX)的吸附。通过比表面积和孔径分析、扫描电子显微镜、傅里叶红外光谱仪对竹基生物炭进行表征分析。结果表明:竹基生物炭吸附BPA和SMX符合伪二级动力学和Freundlich等温吸附模型,表明吸附机制是化学吸附过程,属于多分子层吸附。随溶液pH增加,竹基生物炭对SMX吸附量先增加后减小,pH=5时出现最高吸附去除率40.1%;然而,竹基生物炭对BPA吸附量溶液pH增加呈现逐渐减小趋势。水中共存腐殖酸对SMX的吸附有明显抑制作用,但腐殖酸和BPA通过氢键作用和π-π作用有力结合进而整体上促进了生物炭对BPA的吸附。Bamboo-based biochar substrates were prepared by high-temperature pyrolysis method using bamboo as raw material,and the adsorption behavior of bisphenol A(BPA)and sulfamethoxazole(SMX)onto the biochar was investigated.A series of characterization analysis was carried out including specific surface area and pore size analysis,scanning electron microscope,and Fourier transform infrared spectroscopy.The results showed that the adsorption of BPA and SMX by bamboo-based biochar conformed to the pseudo-second-order kinetics and the Freundlich isotherm adsorption model,indicating that the adsorption process was a surface diffusion process of physical and chemical adsorption,and belonged to a physicochemical multi-molecular layer adsorption process.With the solution pH increasing,the adsorption capacity of SMX on the biochar firstly increased and then reduced with highest removal performance of 40.1%.However,the adsorption of BPA onto the biochar continuously decreased when the solution pH ranged from 3 to 11.Humic acid could inhibit the adsorption of SMX through competitive adsorption.Interestingly,humic acid promoted the adsorption of BPA onto the bamboo-based biochar.

关 键 词：湿地基质 生物炭 吸附 微量有机污染物 pH 腐殖酸 

分 类 号：TQ424[化学工程]