底泥陶粒的制备及其磷吸附性能

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关键词：底泥陶粒；高温烧结；除磷性能；孔隙结构；磷吸附特性

DOI：10.15938/j. jhust. 2025.06.016

中图分类号：X705；X52 文献标志码：A 文章编号：1007-2683（2025）06-0142-10

Abstract：Thesedimentcompositionof thecomprehensiveimprovementprojectofthetailofGanjiang River wasanalyzed，the preparationparametersofhigh-temperaturesinteredceramsitewereoptimized，theporestructureofceramsitewasimproved，andthe effectsofporestructure，pHvaue，initialconcentrationandotherfactorsonthephosphorusremovalperformanceofceramsitewere explored.Thedsotioneticsdsotaladsoptiodelreostuctedtscustedsotionaractestifdt ceramsite，andthe mechanismofphosphorusadsorptionofceramsitewasrevealedbyinductivelycoupled plasma masspectrometryand X-raydifrationanalysisTheresults indicatethatthechemicalcompositionofthesedimentispredominantlycomposdofoidessuch as silicon dioxide and aluminum oxide. Under the sintering conditions of 1050cC and 15 minutes，the pore structure of the ceramsite developsoreadsorptionsitesduringthephosphorusadsorptionprocess，efectivelyenhancingitsphosphrusremovalperfoance. The phosphorus removal efficiency of the ceramsite gradually decreases as the pH of the solution increases，with the optimal removal efectbservedatpH4.Theadsorptionprocessofphosphorusbysedimentceramsiteconfostothepseudosecond-orderineticodel andtheFreundlichodeldicatingthatthedsorptioprocessisainlyhemicaldsorptionandtheegtielyargdoshate ionsareadsorbedbyelectrostaticinteraction.Thecomplexporestructureisconducivetothecaptureofphosphorusattheactivesite， andthecomplexityoftheinternal pore structureof theceramsiteispositivelycorelated withthephosphorusremoval ffect.

Keywords：sediment ceramsite；high-temperature sintering；phosphorusremoval performance；porestructure；phosphoru adsorption characteristics

0 引言

底泥疏浚是控制底泥污染的主要处理方式，由于疏浚底泥量大、含水率高、强度低、转运成本高，且底泥存在重金属和有机氮磷，极易造成二次污染[1-2]。（剩余12738字）