Heterogeneous nucleation and growth of manganese(oxyhydr)oxides on mineral surfaces and their geochemical significances
Manganese(oxyhydr)oxides(MnOx)are ubiquitously distributed in natural environment with characteristics of high specific surface area and strong reactivity.The formation and transformation of MnOx significantly influence geochemical processes such as the redox cycling as well as the migration and transformation of environmental substances on the Earth's surface.The foreign mineral surfaces can catalyze the oxidation of Mn(Ⅱ)and the subsequent crystallization,and provide substrate for the heterogeneous nucleation and growth of MnOx,which are important places for the formation of MnOx.In recent years,the heterogeneous nucleation and growth processes induced by mineral surfaces have been paid widely attention.In this paper,we have reviewed the current understanding on the heterogeneous nucleation and growth processes of MnOx on surfaces of typical environmental minerals including iron and manganese(oxyhydr)oxides,clay minerals,carbonate minerals,and quartz.The influences of mineral structures and environmental conditions on reaction pathways and product structures are also discussed.Finally,some future relevant research directions are prospected.
manganese(oxyhydr)oxidesheterogeneous nucleation and growthredox cyclingmineral structuresenvironmental conditions
万方数据
维普
