• 关键词：天然矿物  锰矿砂  苯酚  吸附  降解

• 基金项目：国家自然科学重点基金(批准号29637010)资助

• 郑红
• 中科院生态环境研究中心环境水化学国家重点实验室,北京 100085

• 汤鸿霄
• 中科院生态环境研究中心环境水化学国家重点实验室,北京 100085

• 摘要：研究了天然矿物锰矿砂对苯酚的界面吸附与降解,结果表明锰矿砂对苯酚具有较强的吸附作用。较高温度、低pH值、固相与苯酚的较高质量比值有利于苯酚的吸附。吸附过程遵循二级反应动力学,吸附等温线为Langmuir型。应用简化的表面络合反应模式,求得了不同条件下的条件稳定常数及吸附苯酚的表面总吸附位。适量的锰矿砂在最佳条件下可去除苯酚80%以上,其中光催化降解作用约占6%左右。酸性条件下光照和暗反应均有对苯醌检出,光照促进了锰矿砂的溶解。对降解机理进行了初步探讨.

• Abstract：In this paper, the adsorptionand degradation of phenolon natural manganeseore were studied. There sultsindi catethat manganeseoreparti clesare excellent adsorbents forphenol.Highertemperature, lowp Hand higher massratio of solid/phenolarefavorabletoadsorptionofphenolon manganeseoresur faces.Second order kinetics were observed during adsorption process.The adsorption is otherms are linearised accordingto Langmuir model.Conditiona ladsorption constants and total manganese ore surface siteconcentration of surface complexes of phenol with manganeseoreparticles werecalculatedbyasimpli fiedsurfacecomplexation model.Removalpercentage ofphenolon manganeseoresurfaces underthe best condition was over80%, in which sunlight photolysispercentage was about 6%. p benzoquinone was main oxidized product under acidicpH conditions.Light is favorable to there dox reaction oninterface.Possible degradation mechanisms were discussed.

• Key words：natural minerals  manganese ore  phenol  adsorption  degradation

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