Co-removal potential of heavy metals and dyes from wastewater by simultaneous adsorption with biomass residue formed from microbial treatment of lacquer residue  

作　　者：Xinyue LU Min LIAO Xiaomei XIE Hao QIU Feng YUAN Zhe LUO Chunlin FAN 

机构地区：[1]Zhejiang Key Laboratory of Agricultural Resources and Environment,College of Environmental and Resource Science,Zhejiang University,Hangzhou,310058,China [2]Experimental Teaching Center,College of Environmental and Resource Science,Zhejiang University,Hangzhou,310058,China [3]Ningbo Ferno Biotechnology Co.,Ltd.,Ningbo,315502,China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2025年第1期1-20,共20页浙江大学学报(英文版)A辑(应用物理与工程)

基　　金：National Key Research and Development Program of China(Nos.2023YFD1702003 and 2023YFC3709001).

摘　　要：This study aims to optimize the use of lacquer residue biomass(LBM).We investigated the ability of LBM to remove Pb2+heavy metal ions and the typical cationic dye methylene blue(MB)and anionic dye Congo red(CR)by simultaneous adsorption from composite systems,as well as the relevant factors.Scanning electron microscopy(SEM),X-ray diffraction(XRD),and Fourier transform infrared spectroscopy(FTIR)were used to characterize adsorption behavior.The adsorption kinetics of Pb2+-MB/CR composite systems can be effectively characterized by the pseudo-second-order kinetic model(R2>0.97).In the Pb2+-MB composite system,adsorption was antagonistic with similar adsorption sites.However,in the Pb2+-CR composite system,we found that adsorption was synergistic with different adsorption sites,which led to a higher simultaneous adsorption capacity for a higher initial Pb2+-CR concentration,unlike the Pb2+-MB system.In both composite systems,an appropriate increase in LBM dosage and system temperature within a certain range was conducive to simultaneous adsorption and removal of Pb2+-MB/CR composite systems.The optimal solid-liquid ratio and temperature were 1:75 and 30°C,respectively.The adsorption and removal rates of Pb2+and MB were 99.98%and 90.49%,respectively,and those of Pb2+and CR were 93.99%and 77.39%,respectively,in(50,50)mg/L of Pb2+-MB/CR composite systems under these conditions.Adsorption removal of Pb2+and MB improved with higher pH levels,and worsened with the increase of ionic strength in the solution,while the removal rate of CR showed an opposite trend.The coexisting anion and cation types had limited influence on the simultaneous adsorption removal of Pb2+,MB,and CR.The results of desorption showed that LBM can be utilized as a disposable material for simultaneously treating Pb2+-MB/CR composite systems.The simultaneous adsorption mechanisms of Pb2+-MB/CR mainly involved hydrogen bonding,π-πbonding interaction,and electrostatic interaction.

关 键 词：Lacquer residue biomass(LBM) Lead Methylene blue(MB) Congo red(CR) Simultaneous adsorption removal 

分 类 号：O64[理学—物理化学]