K2FeO4改性牛粪生物炭的制备及其对含镉废水的高效去除

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中图分类号：TQ424 文献标志码：A 文章编号：1671-0460（2026）01-0035-07

Abstract： In order to improve the adsorption performance of biochar to Cd2+ in wastewater and realize the high-value utilizationoflivestockand poultrymanure，cowmanureand K2FeO4 -modifiedcowmanurewereselectedasraw materials to produce cow manure biochar （CBC） and iron-modified cow manure biochar （FCBC）. The physical and chemical properties，FTIR and XRDanalysis wereused to characterize the structure and phase composition of the two biochars before and after adsorption of Cd2+ ，and the adsorption behavior and mechanism of Cd2+ were investigated by experiments.The results showed that，compared with CBC，thepeak strengthofoxygen-containing functional groups and C=O ） on the surface of FCBC was significantly enhanced， and Fe—O functional groups also appeared. In addition， in terms of phase composition， it was also found that SiO2 existed in CBC but CaCO3 appeared in FCBC. The maximum adsorption capacity of Cd2+ byFCBC ⋅112.60mg⋅g-1 ）wasabout 4.48 times that ofCBC （25.13mg⋅g-1） ，and the adsorption capacity of Cd2+ was increased by 348% .The kinetic and isothermal equilibrium adsorption results were well described byElovichand Freundlich models，respectively.The adsorption of Cd2+ by FCBC wascharacterized by multi-layer chemisorption on non-homogeneous surfaces. The adsorption mechanisms were mainly CdCO3 （2号 precipitation， complexation of Cd2+ with oxygen-containing functional groups and formation of Cd2+-π bond.

Key Words： K2FeO4; Cow manure; Pyrolysis; Biochar;Adsorbents; Cadmium-containing Wastewater; Adsorption

伴随工业化和城市化进程的加快，大量重金属（如镉Cd、铬 cr 、铅 Pb 、砷As、汞 Hg 、铜 cu 等）被排放到农业土壤、湖泊、河流和地下水中，对生态环境和公众健康已构成严重威胁[1]。（剩余15070字）