投稿网址:http://journal.lnpu.edu.cn辽宁石油化工大学学报JOURNALOFLIAONINGPETROCHEMICALUNIVERSITY第43卷第3期2023年6月Vol.43No.3Jun.2023壳聚糖⁃稀土⁃生物炭对水体Cr(Ⅵ)的吸附性能分析孟阳,魏太庆,艾丹,王博,范志平(辽宁石油化工大学环境与安全工程学院,辽宁抚顺113001)摘要:以玉米秸秆为生物炭原料,通过壳聚糖和稀土对其改性,分别制备了壳聚糖⁃氯化镧⁃生物炭复合材料(CBC⁃La)和壳聚糖⁃氯化铈⁃生物炭复合材料(CBC⁃Ce)。采用XRF、FT⁃IR和XRD对CBC⁃La和CBC⁃Ce的结构与性能进行分析,探究了不同吸附条件下对水体Cr(Ⅵ)的吸附性能。结果表明,Langmuir方程能够很好地模拟等温吸附行为,准一级动力学方程的拟合度较高,CBC⁃La和CBC⁃Ce的平衡吸附量理论值分别为21.08、19.16mg/g,表现出良好的吸附效果。解吸实验结果表明,CBC⁃La和CBC⁃Ce具有重复使用的可能性;吸附机制主要包括静电作用、氢键作用和离子交换。实验证明,壳聚糖⁃稀土⁃生物炭复合材料对去除水体Cr(Ⅵ)具有良好的应用前景。关键词:生物炭;氯化镧;氯化铈;壳聚糖;六价铬;吸附中图分类号:TE992.1文献标志码:Adoi:10.12422/j.issn.1672⁃6952.2023.03.003AdsorptionPerformanceofChitosan⁃RareEarth⁃BiocharCompositeforCr(Ⅵ)inWaterMengYang,WeiTaiqing,AiDan,WangBo,FanZhiping(SchoolofEnvironmentalandSafetyEngineering,LiaoningPetrochemicalUniversity,FushunLiaoning113001,China)Abstract:Usingcornstrawasrawmaterialofbiocharandmodifiedwithchitosanandrareearth,chitosan⁃lanthanumchloride⁃biocharcompositesandchitosan⁃ceriumchloride⁃biocharcompositeswerepreparedrespectively.ThestructureandperformanceofCBC⁃LaandCBC⁃CewereanalyzedbyXRF,FT⁃IRandXRD.TheadsorptionpropertiesofCr(Ⅵ)inwaterunderdifferentadsorptionconditionswereinvestigated.TheexperimentalresultsshowthattheLangmuirequationcansimulatetheisothermaladsorptionbehaviorwell,andthequasi⁃first⁃orderkineticequationhasahigherfittingdegree.Thetheoreticalequilibriumadsorptioncapacityare21.08mg/gand19.16mg/g,whichisclosetotheactualvalue.ThedesorptionexperimentsshowthatCBC⁃LaandCBC⁃Cehadthepossibilityofreuse.Theadsorptionmechanismmainlyincludeselectrostaticadsorption,complexationandionexchange.Thee...