化工进展ChemicalIndustryandEngineeringProgress2023年第42卷第3期H3PO4活化核桃壳制备活性炭及在Cr(Ⅵ)吸附中的应用邢献军1,2,3,4,罗甜1,卜玉蒸1,马培勇4(1合肥工业大学化学与化工学院,安徽合肥230009;2合肥工业大学先进能源技术与装备研究院,安徽合肥230009;3国家新能源汽车储供能产品产业计量测试中心,安徽合肥230051;4合肥工业大学机械工程学院,安徽合肥230009)摘要:以核桃壳为原料、磷酸(H3PO4)为活化剂,制备核桃壳基活性炭(PBC),并对其吸附Cr(Ⅵ)性能进行探究。分别使用SEM、TEM、BET、FTIR、Raman、XPS等表征探究PBC的理化特性。研究溶液pH、活性炭用量和初始浓度对吸附性能的影响,研究PBC在不同吸附时间下吸附Cr(Ⅵ)动力学行为,分析吸附机理。结果表明,在磷酸浸渍比为1∶1,热解温度为400℃时,制备的核桃壳基活性炭具有良好的吸附性能。对较低浓度的Cr(Ⅵ)溶液(≤50mg/L)吸附率达到100%,吸附动力学和等温线分别符合拟二级动力学模型和Langmuir模型,吸附过程中化学吸附占主导地位,并且热力学分析表明吸附过程是自发的吸热过程。关键词:生物质;活性炭;吸附中图分类号:TQ424.1文献标志码:A文章编号:1000-6613(2023)03-1527-13PreparationofbiocharfromwalnutshellsactivatedbyH3PO4anditsapplicationinCr(Ⅵ)adsorptionXINGXianjun1,2,3,4,LUOTian1,BUYuzheng1,MAPeiyong4(1CollegeofChemistryandChemicalEngineering,HefeiUniversityofTechnology,Hefei230009,Anhui,China;2AdvancedEnergyTechnologyandEquipmentResearchInstitute,HefeiUniversityofTechnology,Hefei230009,Anhui,China;3NationalNewEnergyVehicleEnergyStorageandSupplyProductIndustryMeasurementandTestingCenter,Hefei230051,Anhui,China;4CollegeofMechanicalEngineering,HefeiUniversityofTechnology,Hefei230009,Anhui,China)Abstract:Walnutshell-basedactivatedcarbonPBCwaspreparedusingwalnutshellasrawmaterialandphosphoricacid(H3PO4)asactivator,anditsadsorptionperformanceonhexavalentchromiumwasstudied.ThephysicalandchemicalpropertiesofPBCweremeasuredusingSEM,TEM,BET,FTIR,Raman,XPSandothercharacterizations,respectively.TheeffectsofsolutionpH,activatedcarbondosageandinitialconcentrationontheperformanceofCr(Ⅵ)adsorptionwereinvestigated.ThekineticbehaviorofCr(Ⅵ)adsorptionbyPBCw...