凹凸棒石改性污泥生物炭对模拟水体中重金属的吸附

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中图分类号：X703；X52 文献标志码：A 文章编号：1672-2043（2026）01-0189-10 doi：10.11654/jaes.2024-1129

Adsorption study of heavy metals in simulated water bysludge biochar modified with atapulgite materials

TAO Ling1，2.3.4， XIAO Yiran1，RENHanru14，LI Yunmeng1，MU Xuri-1 ，ZHU Rui'，TONG Caili'， GAO Min'， REN Jun1，2，3，4* （204号 （1.SchoolofviotaldialEging，oiotgUesityzouina;.stryfutio EngineeringResearchCenterofWaterResourceComprehensiveUtilizationinColdandAridRegions，Lanzhou73O0，China;3.Key LaboratoryofYelowRiver WaterEnvironmentinGansuProvince，LanzouJiaotongUniversity，Lanzhou3Ooo，China;4.Gansu Hanxing EnvironmentalProtectioCo.，Ltd.，Lazhou730o0，China;5.NingxiaNormalUniversityGuyuan756099，Cina）

Abstract：Toproperlytreatmunicipalsludgeandimprovetheperformanceofbiocharadsorbentfortheadsorptionofvarioushavymetals. Sludgebiocharmodifedwithatapulgitematerialsaspreparedbypyrolysisusingsldgeandatapulgiteasrawmaterials.Teadsoption performance of the modified materials for Cd2+ ， Cr3+ ， Zn2+ andNi 12+ in simulated water was investigated. The results showed that when the mass ratio of sludge biochar to attapulgite was 2：1 ，pH was 5，the addition amount was 1g⋅L-1 ，and the concentration of the four heavy metals of 10.0mg⋅L-1 ，the removal of Cd2+ ， Cr3+ ， Zn2+ andN 12+ by the modified material was 83% ， 87% ，89 % and 88% ，respectively. The adsorption processes of Cd2+ Cr3+ Zn2+ andNi 12+ bymodified materials followed the quasi first order kinetic model and Langmuir model.The adsorptionmechanismofthemodifiedmaterialsonheavymetalswasdeterminedbycharacterizationmeanssuchasscanningelectron microscope，X-adiacodifredspectrooy.Iinlyosistsoforefiling，olexaofygontangfucioal groups，heavy metal -π electronic interactions，ion-exchange of N a+ and co-precipitation of silicates and CO 32- . In this study，the sludge biocharmodifiedwithatapulgitepreparedpresentedexcelentadsorptionfortheremoalofultipleeavymetals，whichprovdesanew idea for the study of simultaneous removal of multiple heavy metals in waterbodies and the utilization of sludge.

Keywords：sludge;biochar;attapulgite; alkali modification; heavy metals

电镀、采矿和电池制造行业的快速发展，致使大量含 Cd2+ 、 Cr3+ / Zn2+ 和 Ni2+ 等重金属离子的废水排放 ⋅[1-2] 。（剩余17646字）