摘要:A portable,cost-effective,environmental friendly and miniature photoelectrochemical system in conjunction with a ultraviolet light emitting diode(UV-LED) is developed for determination of chemical oxygen demand(COD),namely UV-LED PeCOD. The COD value is directly quantified by measuring the electrons captured at a nanostructured TiO2 electrode during the photoelectrocatalytic degradation of organic species in wastewater.
摘要:Secondary nonferrous production is addressed as one of the potential sources of unintentional produced persistent organic pollutants(UP-POPs) due to the impurity of raw material. However,the release inventory of Polychlorinated naphthalenes(PCNs) is very scarce for these secondary nonferrous metallurgies. This study selected the typical secondary copper,aluminum,zinc and lead plants to investigate the emissions of PCNs released from secondary nonferrous production in China.
摘要:It was reported that many compounds VO cores-containing complexes could catalyze theoxidation of various organic compounds by addition of H202 through Fenton-like pathw-ays. Moreover,vanadium(V)could combine with iron ion to form the rather stablesol-id substances in acidic condition. Therefore,there is a possibilitythat the copoun-dscontaining iron ion and V anion may be employed as the two-way Fenton-like hetero-geneous catalysts. A simple Fe-V compound,FeV04,was selected as the first exampleof the potentialtwo-way Fenton-like catalysts in our project. This contribution wasmainly focused onthree aspects:(i) the catalytic performance of FeV04,(ii) stabil-ity of FeV04,(iii) thecatalytic mechanism of FeV04. In addition,Orange II was sel-ectedas a modelcontaminant. The experimental results showed that FeV04 could effectivelycatalyze H202 to generate active hydroxyl radical -OH both in dark and underillumination. Therefore,it was employed as a heterogeneous Fenton-like andphoto-Fenton-like catalyst in the present contribution. Compared with theconventional heterogene-ous Fenton-like catalysts,α-Fe203,Fe304 and γ-Fe00H,FeV04 possessed a much high-er catalytic activity. The high catalytic activity possiblyinvolved in a special tw-o-way Fenton-like mechanism,that is,the activation of H202by both Fe(Ⅲ) and V(V)inFeV04,and in a semiconductor photocatalysis towardsthe activation of H202 and reduct-ion ofFe(Ⅱ) to Fe(Ⅱ),as shown as the followingfigure。