With the increasing application of pyrolyzed carbon(PC)in the environment,the coexistence of natural organic matter(NOM)and PC in the environment is becoming more and more common.Both of them have the ability of mediating electron transport,but the combined mediating electron transfer process by both PC and NOM has not been studied.In this paper,anthraquinone-2,6-disulfonate(AQDS)is used as the simulation of NOM under laboratory conditions,and different qualities of graphene are combined with sodium alginate to prepare PC samples with obvious conductivity differences.The cyclic voltammetry curves of AQDS mixed with PC with different conductivity were scanned by the electrochemical workstation,and the changes of electron transfer constant rate were calculated and analyzed.Due to its large specific surface area and abundant oxygen-containing functional groups,PC can adsorb certain AQDS.The electron transfer constant rate analysis shows that although some AQDS are adsorbed,the electron transfer capacity of remaining AQDS in solution could be enhanced by PC.The strengthening effect was enhanced with the conductivity increase of PC.Since the electron transfer process mediated by both PC and NOM plays an important role in many biogeochemical processes such as carbon and nitrogen cycles in the environment,this study will provide theoretical support for accurately evaluating the combined geochemical effects of PC and NOM.
关键词
热解炭/NOM/导电性/电子传递
Key words
pyrolyzed carbon/NOM/conductivity/electron transport
维普
万方数据