Work

Effect of a photocatalytic composite coupled with potamogetor crispus on control sediment phosphorus

Year: 2020

Type: article

Abstract: The treatment efficiency of phosphorus (P) in a sediment with the joint action of a new photocatalytic composite Sr-TiO2/PCFM and submerged macrophyte was studied for the first time in Donghu Lake, Wuhan, China.The results showed that Sr-TiO2/PCFM prepared by the sol-gel process exhibited a strong photocatalytic capacity.The dosage of Sr-TiO2/PCFM, irradiation, operation temperature, reaction time and pH were the principal factors affecting the removal of each sediment P forms by Sr-TiO2/PCFM.The synergistic effect of Sr-TiO2/PCFM and submerged macrophyte Potamogetor crispus on the sediment P under irradiation and control conditions showed that the removal rates of each P form have been further enhanced after irradiation.The unity of Sr-TiO2/PCFM and Potamogeton crispus plays a more important role in removing the sedimental P than the summation of Sr-TiO2/PCFM and Potamogeton crispus used separately under the irradiation conditions.The results suggested that the united technology of Sr-TiO2/PCFM and submerged macrophyte could be further applied to the treatment of endogenous P pollution in eutrophic lakes.Keywords: Sr-TiO2/PCFM, submerged macrophyte, synergistic effect, sediment P in all fractions, P removal V jezeru Donghu v Wuhanu na Kitajskem so prvi~{tudirali u~inkovitost obdelave usedlin fosforja v povezavi z delovanjem fotokataliti~nega kompozita Sr-TiO2/PCFM v podvodnem rastlinju.Rezultati raziskave so pokazali, da ima Sr-TiO2/PCFM, pripravljen po Sol-Gel-postopku mo~no fotokataliti~no kapaciteto.Doziranje Sr-TiO2/PCFM, obsevanje, temperatura delovanja, reakcijski ~as in pH, so glavni faktorji, ki vplivajo na odstranitev fosforja iz vsake usedline z Sr-TiO2/PCFM.Avtorji ~lanka ugotavljajo, da je sinergisti~ni u~inek Sr-TiO2/PCFM in podvodnega rastlinja iz kodravega dristavca (Potamogetor crispus) na usedline fosforja pod vplivom obsevanja in pri kontroliranih pogojih dodatno pospe{en po obsevanju.Skupno delovanje Sr-TiO2/PCFM in kodravega dristavca igra bolj pomembno vlogo pri odstranitvi usedlin fosforja, kot lo~ena uporaba vsakega posebej v enakih koli~inah in obsevanju.Rezultati {tudije nakazujejo, da se enovita tehnologija Sr-TiO2/PCFM in podvodnega makrofita lahko uporablja tudi za obdelavo endogene onesna`enosti s fosforjem v evtroficiranih jezerih, to je jezerih, v katerih poteka pretiran proces razra{~anja biomase (rastlinja, alg itd.).

Source: Materiali in tehnologije

DOI: 10.17222/mit.2019.267