{"title":"使用掺杂 Fe2O3 的二氧化钛和铜对垃圾填埋场渗滤液进行光降解的比较研究","authors":"N. Thangam, V. Lavanya, S. Suriya","doi":"10.1007/s40996-024-01577-5","DOIUrl":null,"url":null,"abstract":"<p>Leachate generation is a serious problem for groundwater quality in and around municipal solid waste dumpsites. The degradation of leachate water contaminants using TiO<sub>2</sub>-doped nanocomposites as photocatalysts is studied. The Fe<sub>2</sub>O<sub>3</sub>-doped TiO<sub>2</sub> and Cu-doped TiO<sub>2</sub> nanocomposites are synthesized by the sol–gel method to degrade landfill leachate water contaminants. The impregnation of Fe<sub>2</sub>O<sub>3</sub> and Cu into TiO<sub>2</sub> aims to enhance the separation and migration of electron–hole pairs, increase the generation of reactive oxygen species, and ultimately improve the efficiency of photocatalytic degradation of contaminants in landfill leachate.SEM, XRD, EDX, FITR, and UV-DRS are used to analyze the surface morphology, particle size, elemental composition, and band gap energy of the prepared photocatalysts. The XRD results show Fe<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub> and Cu/TiO<sub>2</sub> have crystalline sizes of 40.03 nm and 18.15 nm, respectively. The surface morphologies of Fe<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub> have a non-uniform size and a spherical shape, but Cu/TiO<sub>2</sub> are tiny, spherical, and slightly clustered. The bandgap energies of Fe<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub> and Cu/TiO<sub>2</sub> are 3.75 eV and 3.87 eV, respectively. The optimal parameters, such as pH, catalyst dosage, and light intensity, are studied to determine the degradation of chemical oxygen demand (COD) and color removal. Results revealed that in the trapezoidal reactor, the maximum decolorization of 67%, 90%, and 78% and COD removal of 63%, 81%, and 72% are achieved for TiO<sub>2</sub>, Fe<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub>, and Cu/TiO<sub>2</sub> photocatalysts, respectively, at 3.5 h. Similarly, for the cylindrical reactor, color removal of 60%, 80%, and 70% and COD removal of 55%, 72%, and 65% are achieved for TiO<sub>2</sub>, Fe<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub>, and Cu/TiO<sub>2</sub> photocatalysts, respectively, at 3 h. The results of photocatalytic degradation of the leachate ensures the efficiency of the reactor and it is reused for several times to attain the maximum stability for real-time application in the treatment of landfill leachate.</p><h3 data-test=\"abstract-sub-heading\">Graphic Abstract</h3>\n","PeriodicalId":14550,"journal":{"name":"Iranian Journal of Science and Technology, Transactions of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.7000,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Comparative Studies on Photo-Degradation of Landfill Leachate Using TiO2 Doped Fe2O3 and Cu\",\"authors\":\"N. Thangam, V. Lavanya, S. Suriya\",\"doi\":\"10.1007/s40996-024-01577-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Leachate generation is a serious problem for groundwater quality in and around municipal solid waste dumpsites. The degradation of leachate water contaminants using TiO<sub>2</sub>-doped nanocomposites as photocatalysts is studied. The Fe<sub>2</sub>O<sub>3</sub>-doped TiO<sub>2</sub> and Cu-doped TiO<sub>2</sub> nanocomposites are synthesized by the sol–gel method to degrade landfill leachate water contaminants. The impregnation of Fe<sub>2</sub>O<sub>3</sub> and Cu into TiO<sub>2</sub> aims to enhance the separation and migration of electron–hole pairs, increase the generation of reactive oxygen species, and ultimately improve the efficiency of photocatalytic degradation of contaminants in landfill leachate.SEM, XRD, EDX, FITR, and UV-DRS are used to analyze the surface morphology, particle size, elemental composition, and band gap energy of the prepared photocatalysts. The XRD results show Fe<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub> and Cu/TiO<sub>2</sub> have crystalline sizes of 40.03 nm and 18.15 nm, respectively. The surface morphologies of Fe<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub> have a non-uniform size and a spherical shape, but Cu/TiO<sub>2</sub> are tiny, spherical, and slightly clustered. The bandgap energies of Fe<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub> and Cu/TiO<sub>2</sub> are 3.75 eV and 3.87 eV, respectively. The optimal parameters, such as pH, catalyst dosage, and light intensity, are studied to determine the degradation of chemical oxygen demand (COD) and color removal. Results revealed that in the trapezoidal reactor, the maximum decolorization of 67%, 90%, and 78% and COD removal of 63%, 81%, and 72% are achieved for TiO<sub>2</sub>, Fe<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub>, and Cu/TiO<sub>2</sub> photocatalysts, respectively, at 3.5 h. Similarly, for the cylindrical reactor, color removal of 60%, 80%, and 70% and COD removal of 55%, 72%, and 65% are achieved for TiO<sub>2</sub>, Fe<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub>, and Cu/TiO<sub>2</sub> photocatalysts, respectively, at 3 h. The results of photocatalytic degradation of the leachate ensures the efficiency of the reactor and it is reused for several times to attain the maximum stability for real-time application in the treatment of landfill leachate.</p><h3 data-test=\\\"abstract-sub-heading\\\">Graphic Abstract</h3>\\n\",\"PeriodicalId\":14550,\"journal\":{\"name\":\"Iranian Journal of Science and Technology, Transactions of Civil Engineering\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.7000,\"publicationDate\":\"2024-08-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Iranian Journal of Science and Technology, Transactions of Civil Engineering\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1007/s40996-024-01577-5\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENGINEERING, CIVIL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Iranian Journal of Science and Technology, Transactions of Civil Engineering","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s40996-024-01577-5","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}
Comparative Studies on Photo-Degradation of Landfill Leachate Using TiO2 Doped Fe2O3 and Cu
Leachate generation is a serious problem for groundwater quality in and around municipal solid waste dumpsites. The degradation of leachate water contaminants using TiO2-doped nanocomposites as photocatalysts is studied. The Fe2O3-doped TiO2 and Cu-doped TiO2 nanocomposites are synthesized by the sol–gel method to degrade landfill leachate water contaminants. The impregnation of Fe2O3 and Cu into TiO2 aims to enhance the separation and migration of electron–hole pairs, increase the generation of reactive oxygen species, and ultimately improve the efficiency of photocatalytic degradation of contaminants in landfill leachate.SEM, XRD, EDX, FITR, and UV-DRS are used to analyze the surface morphology, particle size, elemental composition, and band gap energy of the prepared photocatalysts. The XRD results show Fe2O3/TiO2 and Cu/TiO2 have crystalline sizes of 40.03 nm and 18.15 nm, respectively. The surface morphologies of Fe2O3/TiO2 have a non-uniform size and a spherical shape, but Cu/TiO2 are tiny, spherical, and slightly clustered. The bandgap energies of Fe2O3/TiO2 and Cu/TiO2 are 3.75 eV and 3.87 eV, respectively. The optimal parameters, such as pH, catalyst dosage, and light intensity, are studied to determine the degradation of chemical oxygen demand (COD) and color removal. Results revealed that in the trapezoidal reactor, the maximum decolorization of 67%, 90%, and 78% and COD removal of 63%, 81%, and 72% are achieved for TiO2, Fe2O3/TiO2, and Cu/TiO2 photocatalysts, respectively, at 3.5 h. Similarly, for the cylindrical reactor, color removal of 60%, 80%, and 70% and COD removal of 55%, 72%, and 65% are achieved for TiO2, Fe2O3/TiO2, and Cu/TiO2 photocatalysts, respectively, at 3 h. The results of photocatalytic degradation of the leachate ensures the efficiency of the reactor and it is reused for several times to attain the maximum stability for real-time application in the treatment of landfill leachate.
期刊介绍：
The aim of the Iranian Journal of Science and Technology is to foster the growth of scientific research among Iranian engineers and scientists and to provide a medium by means of which the fruits of these researches may be brought to the attention of the world’s civil Engineering communities. This transaction focuses on all aspects of Civil Engineering
and will accept the original research contributions (previously unpublished) from all areas of established engineering disciplines. The papers may be theoretical, experimental or both. The journal publishes original papers within the broad field of civil engineering which include, but are not limited to, the following:
-Structural engineering-
Earthquake engineering-
Concrete engineering-
Construction management-
Steel structures-
Engineering mechanics-
Water resources engineering-
Hydraulic engineering-
Hydraulic structures-
Environmental engineering-
Soil mechanics-
Foundation engineering-
Geotechnical engineering-
Transportation engineering-
Surveying and geomatics.
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