Fenton-like oxidation assisted ultrasound method is utilized to regenerate waste bio-based activated carbon,and the desulfurization effect of regenerated activated carbon is studied in detail.In the process of Fenton-like oxidation assisted ultrasound regeneration,the impacts of ultrasonic time,ultrasound power,pH value of Fenton-like reagent and H2O2 dosage on the regeneration rate of activated carbon are explored.The changes in specific surface area and surface chemical properties of activated carbon before and after regeneration are studied by means of BET and XRD.The study results show that Fenton-like oxidation assisted ultrasound regeneration can effectively improve the regeneration rate of waste activated carbon from 24.19% to 64.5%.The regenerated activated carbon presents the best desulfurization effect when the ultrasonic time is 50 min,ultrasound power is 80 W,pH is 5 and H2O2 dosage is 0.3 mL.After regeneration,the specific surface area of activated carbon increases from 318.48 m2/g to 326.37 m2/g,and the oxygen-containing functional groups on the surface increases,which improves the desulfurization rate of activated carbon.
由图4可知,当Ce3+离子加入量不变时,活性炭的再生率随着H2O2加入量的增加而增加,效果最好的是加入0.3 mL H2O2再生的活性炭,再生率达到64.5%,再继续增加H2O2的量,可以看出活性炭的再生率开始下降。这是由于Ce3+可以催化H2O2分解生成羟基自由基·OH[16],前期Ce3+充足,随着H2O2的投加量的增加,活性炭的再生速率加快,继续增加H2O2的投加量,由于过量的H2O2与Ce3+反应生成沉淀且羟基自由基可能会互相发生反应而产生淬灭[17],所以活性炭的再生率随着H2O2投入量的增加而降低。因此,从图中可以得出,本实验H2O2最佳的投加量为0.3 mL。
FloresR, RodasA, GasperinR. Oxidative desulfurization of diesel fuel oil using supported Fenton catalysts and assisted with ultrasonic energy[J]. Petroleum Science, 2019, 16(5):1176-1184.
[2]
CaoX, LiX P, JiangJ, et al. Preparation of flower-like cobalt molybdate and its aerobic oxidation desulfurization performance[J]. Journal of Liaoning Petrochemical University, 2024, 44(2):14-21.
[3]
ZhangS P, JianW W, MaD Z, et al. Research progress of adsorption properties of carbon adsorbents for VOCs[J]. Journal of Liaoning Petrochemical University, 2021, 41(1):30-36.
OdetoyeT E, AbuBakar M S, TitiloyeJ O. Pyrolysis and characterization of Jatropha curcas shell and seed coat[J]. Nigerian Journal of Technological Development, 2019, 16(2):71.
JiZ W. Comparison of several kinds of activated carbon regeneration technology[J]. Scientific and Technological Innovation, 2017,36:195-196.
[8]
LiuX Y, OuyangP. Research progress on ultrasonic regeneration of adsorbent materials[J]. Materials Report, 2016, 30(11):110-115.
[9]
WangZ Z. Study on the method of promoting the degradation of tetracycline in fenton system[D]. Daqing: Northeast Petroleum University, 2023.
[10]
GogateP R. Cavitation:An auxiliary technique in wastewater treatment schemes[J]. Advances in Environmental Research, 2002, 6(3):335-358.
[11]
DaiY C, QiY T, ZhaoD Z. Oxidative desulfurization of diesel with ultrasotic-fenton reagent[J]. Petroleum Processing and Petrochemicals, 2007, 38(1):34-38.
[12]
ShenL, WangW, LiT, et al. Powdered activated coke for COD removal in the advanced treatment of mixed chemical wastewaters and regeneration by Fenton oxidation[J]. Chemical Engineering Journal, 2019,371:631-638.
[13]
WangS F. Tentative researches on regeneration of active carbon using gultrasonic method[J]. China Water Wastewater, 1998, 14(2):24.
[14]
MargetaD, GrcicI, PapicS, et al. Impact of ultrasound application on oxidative desulphurization of diesel fuel and on treatment of resulting wastewater[J]. Environmental Technology, 2016,37:293-299.
[15]
MaL, WuZ M, HeM Y, et al. Experimental study on fenton oxidation regeneration of adsorbed toluene saturated activated carbon[J]. Environmental Technology, 2022,43:524-533.
WangX D, LiL H, ZhangJ S, et al. Preparation of MnFe2O4/TiO2 and its Fenton-Like photocatalytic properties[J]. Journal of Liaoning Petrochemical University, 2021, 41(2):32-36.
WangS H, ZuY, QinY C, et al. Fabrication of effective desulfurization species active sites in the CeY zeolites and the adsorption desulfurization mechanisms[J]. Journal of Fuel Chemistry and Technology, 2020, 48(1):52-62.
[20]
DanmalikiG I, SalehT A, et al. Effects of bimetallic Fe-Ce nanoparticles on the desulfurization of thiophenes using activated carbon[J]. Chemical Engineering Journal, 2017,307:914-927.
[21]
ZhangT T, YangY L, LiX, et al. Adsorption characteristics of chloramphenicol onto powdered activated carbon and its desorption performance by ultrasound[J]. Environmental Technology, 2021,42:571-583.
[22]
LvL, HuZ, AnN, et al. A green and sustainable organic molecule electrode prepared by fluorenone for more efficient energy storage[J]. Electrochimica Acta, 2021,377:138088-138100.
[23]
LiuC, SunY, WangD, et al. Performance and mechanism of low-frequency ultrasound to regenerate the biological activated carbon[J]. Ultrason Sonochem, 2017,34:142-153.
AliN, FatemehM, ElhamD. Efficiency of ultrasonic process in regeneration of graphene nanoparticles saturated with humic acid[J]. Desalin Water Treat, 2017,70:290-293.
JingG H, ZhouZ M, LeiS, et al. Ultrasound enhanced adsorption and desorption of chromium(Ⅵ) on activated carbon and polymeric resin[J]. Desalination, 2011,279:423-427.
[28]
LiG M. Establish of Sono-Fenton-Like processes and investigation of the catalytic performances[D]. Harbin: Harbin Institute of Technology, 2019.
[29]
Bagal, ManishaV, Gogate, et al. Sonochemical degradation of alachlor in the presence of process intensifying additives[J]. Separation & Purification Technology, 2012, 90(18):92-100.
[30]
HeckertE G, SealS, SelfW T. Fenton-like reaction catalyzed by the rare earthinner transition metal cerium[J]. Environmental Science & Technology, 2008, 42(13):5014-5019.
[31]
BremnerD H, MolinaR, MartinezF. Degradation of phenolic aqueous solutions by high frequency sono-Fenton systems (US-Fe2O3/SBA-15-H2O2)[J]. Applied Catalysis B Environmental, 2009, 90(3):380-388.