Abstract
Due to the rapid development of the modern chemical industry, a large amount of chlorophenol pollutants remain in the environment. It poses a serious threat to the ecological environment and human health. Advanced oxidation technologies (AOPs) have the characteristics of mild reaction conditions and strong oxidation capacity, and are currently recognized as safe and effective pollutant treatment technologies. In this study, natural lead-rich biochar materials were used to activate sodium persulfate to degrade 2,4-dichlorophenol, and natural lead-rich biochar modified TiO2 photocatalytically degraded 2,4-dichlorophenol. Then, using natural lead-rich metal biochar/TiO2 material, photocatalysis combined with active sodium persulfate to degrade 2,4-dichlorophenol. The experimental results show that the combination of photocatalysis and activated sodium persulfate reaction can completely degrade 100 mg/L 2,4-dichlorophenol under UV light for 3 h, and the degradation efficiency is much higher than the sum of the two separate reactions. Quenching experiments show that SO4- • radicals play the most important role in the three free radicals (SO4- •, •OH and •O2- ) in the advanced oxidation combination system. Finally, the reaction mechanism of the two advanced oxidation combined systems are speculated.
Highlights
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
)LUVWO\ / RI PJ/ RI GLFKORURSKHQRO VROXWLRQ DQG / RI J/ RI VRGLXP SHUVXOIDWH VROXWLRQ ZHUH SUHSDUHG IRU XVH.
Q WKLV H[SHULPHQW WKH FRQFHQWUDWLRQ RI GLFKORURSKHQRO LQ VROXWLRQ ZDV PHDVXUHG E\ KLJK SHUIRUPDQFH OLTXLG FKURPDWRJUDSK\PDVV VSHFWURPHWU\ +3/&06 $JLOHQW 86$ 7KH GHWHFWLRQ ZDYHOHQJWK LV QP 7KH PRELOH SKDVH ZDV D PL[HG VROXWLRQ RI PHWKDQRO DQG ZDWHU YY DW D IORZ UDWH RI P/PLQ
Summary
Q WKLV H[SHULPHQW VROJHO PHWKRG ZDV XVHG WR V\QWKHVL]H ELRFKDU7L2 SKRWRFDWDO\WLF PDWHULDO )LUVW PHDVXUH P/ RI DEVROXWH HWKDQRO DQG P/ RI WHWUDEXW\O WLWDQDWH LQWR D P/ EHDNHU DQG VWLU YLJRURXVO\ IRU PLQ 2EVHUYH ZKHWKHU WKH OLTXLG LQ WKH EHDNHU SURGXFHV IORFFXOHQW SUHFLSLWDWHV ,I QRW SURFHHG ZLWK WKH H[SHULPHQW ,I SUHFLSLWDWLRQ RFFXUV UHFRQILJXUH WKH VROXWLRQ $GG J RI ELRFKDU WR WKH EHDNHU DQG PL[ WKHQ VORZO\ DGG P/ RI GHLRQL]HG ZDWHU WR WKH EHDNHU NHHS VWLUULQJ GXULQJ WKLV SHULRG &RYHU ZLWK SODVWLF ZUDS DQG VWLU IRU K $IWHU WKH VWLUULQJ LV FRPSOHWHG WKH EHDNHU LV SODFHG LQ D GU\LQJ ER[ DQG GULHG DW & $IWHU GU\LQJ LW ZDV FDOFLQHG LQ D KLJK WHPSHUDWXUH WXEH IXUQDFH XQGHU QLWURJHQ DQG DQDHURELF FRQGLWLRQV DW & IRU K WR SUHSDUH D FDWDO\VW WKH KHDWLQJ UDWH ZDV &PLQ 'HJUDGDWLRQ H[SHULPHQW. )LUVWO\ / RI PJ/ RI GLFKORURSKHQRO VROXWLRQ DQG / RI J/ RI VRGLXP SHUVXOIDWH VROXWLRQ ZHUH SUHSDUHG IRU XVH. Q WKLV H[SHULPHQW WKH FRQFHQWUDWLRQ RI GLFKORURSKHQRO LQ VROXWLRQ ZDV PHDVXUHG E\ KLJK SHUIRUPDQFH OLTXLG FKURPDWRJUDSK\PDVV VSHFWURPHWU\ +3/&06 $JLOHQW 86$ 7KH GHWHFWLRQ ZDYHOHQJWK LV QP 7KH PRELOH SKDVH ZDV D PL[HG VROXWLRQ RI PHWKDQRO DQG ZDWHU YY DW D IORZ UDWH RI P/PLQ
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
