胍基改性葡萄废弃物对废水中Cr(VI)的吸附研究  

Study on the Adsorption of Cr(VI)from Wastewater by Guanidinium-based Modified Grape Waste

作　　者：章贞阳[1] ZHANG Zhenyang(School of Medical Engineering,Lianyungang Technical College,Lianyungang 222001,China)

机构地区：[1]连云港职业技术学院医药工程学院,江苏连云港222001

出　　处：《山东化工》2025年第5期269-272,275,共5页Shandong Chemical Industry

摘　　要：通过简单方法成功制备了一种以葡萄废弃物为基础的生物质表面有丰富氨基的功能化材料。1,3-二氨基胍盐酸盐(DGH)被添加到富含单宁的葡萄废弃物中(GW),以改善其理化性质并提高其吸附性能。胍基的改性导致了材料特性的显著变化。该功能化的材料表面有丰富的官能团,可以有效地应用于Cr(VI)的去除。吸附过程表明,静电相互作用是去除Cr(VI)的主要作用机制,同时其他相互作用也可能协同发生。功能化的生物质吸附剂的Cr(VI)最大吸附量(Q_(max))为121.8 mg·g^(-1)。Cr(VI)在DGH功能化吸附剂的吸附热力学研究表明,Cr(VI)在DGH功能化生物质上的吸附是自发的、浓度驱动的单分子层吸附。因此,DGH用来改性生物质材料可以作为一种多功能的吸附剂,应用于废水处理中。A biomass-based material with an amino-rich functionalised surface based on grape waste was successfully prepared by a simple method.N,N-diaminoguanidine hydrochloride(DGH)was added to the tannin-rich grape residue(GW)to improve its physicochemical properties and enhance its adsorption performance.The modification of guanidine hydrochloride resulted in a significant change in the material properties.The functionalised material was effectively applied for the removal of Cr(VI)due to the abundance of functional groups on its surface.The adsorption process shows that electrostatic interactions are the main mechanism of action for the removal of Cr(VI),while other interactions may also occur in concert.The functionalised biomass adsorbent achieved the maximum Cr(VI)adsorption capacity(Q_(max))of 121.8 mg·g^(-1).The thermodynamic study of Cr(VI)adsorption on the GL functionalised adsorbent showed that Cr(VI)adsorption on GL functionalised biomass is spontaneous,concentration-driven single molecule layer adsorption.The GL used to modify the biomass material can therefore be used as a versatile adsorbent for wastewater treatment applications.

关 键 词：吸附 胍基盐酸盐 功能化 生物质 

分 类 号：TQ424[化学工程] X703[环境科学与工程—环境工程]