Study on water—Soluble Organic Reducing Substances：Ⅲ.Electrochemical Properties of Decomposition Products of Rice Straw and Their Interactions with Variable Charge Soils-中国Betway体育网页登陆

摘要 Someelectrochemicalproperties,suchaspH,Eh,andvoltammetricbehavior.ofthedecompositionproductsofricestrawandtheinteractionsoftheseproductswithsoilswerestudied.ThepH,Eh,andamountsoforganicreducingsubstanceschangedmarkedlyduringthe6-dayanaerobicdecomposition.pHdecreasedsharplytopH5onthetenthdayandthenincreasedgraduallyto7onthe45rhday.Theamountsoforganicreducingsubstancesincreasedalmostsynchronouslywiththefallofredoxpotentialduringthefirst15days.Thedifferentialpulsevoltammetric(dpv)behaviorchangednotonlyinthepeakcurrentbutalsointhepeakpotential.Thefractionswithapparentmolecularweightslowerthan200daltonsappearedtobeactiveindpvbehavior.Theelectricchargeandpositivelycharged,respectively.Thegroupwithalowapparentmolecularweightandanegativechargewasthemaincomponentsresponsiblefortheloweranodicpeakpotentials.Theywereoxidizedfirstduringtheinteractionsoftheorganicreducingsubstanceswithsoils.

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Study on water—Soluble Organic Reducing Substances：Ⅲ.Electrochemical Properties of Decomposition Products of Rice Straw and Their Interactions with Variable Charge Soils

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