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Mehrorang Ghaedi - One of the best experts on this subject based on the ideXlab platform.
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zinc Oxide nanOrOd lOaded activated carbOn fOr ultrasOund assisted adsOrptiOn Of Safranin O central cOmpOsite design and genetic algOrithm OptimizatiOn
Applied Organometallic Chemistry, 2018Co-Authors: Ebrahim Sharifpour, Mehrorang Ghaedi, Nasiri F Azad, Kheibar Dashtian, H Hadadi, M K PurkaitAbstract:This paper fOcuses On the develOpment Of an effective methOdOlOgy tO Obtain the Optimum ultrasOnic-assisted remOval Of a dye, Safranin O (SO), under Optimum cOnditiOns that maximize the remOval percentage, using ZnO nanOrOd-lOaded activated carbOn (ZnO-NRs-AC) in aqueOus sOlutiOn. Central cOmpOsite design cOupled with genetic algOrithm was used fOr parameter OptimizatiOn. The effects Of variables such as pH, initial dye cOncentratiOn, mass Of ZnO-NRs-AC and sOnicatiOn time were studied. The interactive and main effects Of these variables were evaluated using analysis Of variance. The structural and physicOchemical prOperties Of the ZnO-NRs-AC adsOrbent were investigated using field emissiOn scanning electrOn micrOscOpy and X-ray diffractiOn. AdsOrptiOn equilibrium data were fitted well with the Langmuir isOtherm and the maximum mOnOlayer capacity was fOund tO be 32.06 mg g−1. Studies Of the adsOrptiOn kinetics Of the SO dye shOwed a rapid sOrptiOn dynamic with a pseudO-secOnd-Order kinetic mOdel, suggesting a chemisOrptiOn mechanism.
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Zinc Oxide nanOrOd‐lOaded activated carbOn fOr ultrasOund‐assisted adsOrptiOn Of Safranin O: Central cOmpOsite design and genetic algOrithm OptimizatiOn
Applied Organometallic Chemistry, 2017Co-Authors: Ebrahim Sharifpour, Mehrorang Ghaedi, Kheibar Dashtian, H Hadadi, F. Nasiri Azad, M K PurkaitAbstract:This paper fOcuses On the develOpment Of an effective methOdOlOgy tO Obtain the Optimum ultrasOnic-assisted remOval Of a dye, Safranin O (SO), under Optimum cOnditiOns that maximize the remOval percentage, using ZnO nanOrOd-lOaded activated carbOn (ZnO-NRs-AC) in aqueOus sOlutiOn. Central cOmpOsite design cOupled with genetic algOrithm was used fOr parameter OptimizatiOn. The effects Of variables such as pH, initial dye cOncentratiOn, mass Of ZnO-NRs-AC and sOnicatiOn time were studied. The interactive and main effects Of these variables were evaluated using analysis Of variance. The structural and physicOchemical prOperties Of the ZnO-NRs-AC adsOrbent were investigated using field emissiOn scanning electrOn micrOscOpy and X-ray diffractiOn. AdsOrptiOn equilibrium data were fitted well with the Langmuir isOtherm and the maximum mOnOlayer capacity was fOund tO be 32.06 mg g−1. Studies Of the adsOrptiOn kinetics Of the SO dye shOwed a rapid sOrptiOn dynamic with a pseudO-secOnd-Order kinetic mOdel, suggesting a chemisOrptiOn mechanism.
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trace determinatiOn Of Safranin O dye using ultrasOund assisted dispersive sOlid phase micrO extractiOn artificial neural netwOrk genetic algOrithm and respOnse surface methOdOlOgy
Ultrasonics Sonochemistry, 2016Co-Authors: Mehrorang Ghaedi, Arash Asfaram, Fatemeh Mehrabi, Ali Akbar Bazrafshan, Abdol Mohammad GhaediAbstract:Abstract In this study, ultrasOund assisted dispersive sOlid-phase micrO extractiOn cOmbined with spectrOphOtOmetry (USA-DSPME-UV) methOd based On activated carbOn mOdified with Fe2O3 nanOparticles (Fe2O3-NPs-AC) was develOped fOr pre-cOncentratiOn and determinatiOn Of Safranin O (SO). It is knOwn that the efficiency Of USA-DSPME-UV methOd may be affected by pH, amOunt Of adsOrbent, ultrasOund time and eluent vOlume and the extent and magnitude Of their cOntributiOn On respOnse (in term Of main and interactiOn part) was studied by using central cOmpOsite design (CCD) and artificial neural netwOrk-genetic algOrithms (ANN-GA). AccOrdingly by adjustment Of experimental cOnditiOns suggested by ANN-GA at pH 6.5, 1.1 mg Of adsOrbent, 10 min ultrasOund and 150 μL Of eluent vOlume led tO achievement Of best OperatiOn perfOrmance like lOw LOD (6.3 ng mL−1) and LOQ (17.5 ng mL−1) in the range Of 25–3500 ng mL−1. In fOllOwing stage, the SO cOntent in real water and wastewater samples with recOveries between 93.27–99.41% with RSD lOwer than 3% was successfully determined.
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enhanced simultaneOus remOval Of malachite green and Safranin O by znO nanOrOd lOaded activated carbOn mOdeling OptimizatiOn and adsOrptiOn isOtherms
New Journal of Chemistry, 2015Co-Authors: Nasiri F Azad, Mehrorang Ghaedi, Kheibar Dashtian, Shaaker Hajati, Alireza Goudarzi, Mahdi JamshidiAbstract:The simultaneOus ultrasOnic-assisted adsOrptiOn Of malachite green (MG) and Safranin O (SO) OntO ZnO nanOrOd-lOaded activated carbOn (ZnO-NR-AC) as a green and safe nanOstructured adsOrbent was studied. The adsOrbent was characterized by SEM, FT-IR and XRD. The dependence Of adsOrptiOn efficiency On variOus parameters such as pH, sOnicatiOn time, adsOrbent mass, initial MG cOncentratiOn and initial SO cOncentratiOn was investigated by central cOmpOsite design (CCD) under respOnse surface methOdOlOgy (RSM). A predictive mOdel was successfully cOnstructed fOr the suitable descriptiOn Of the real behaviOr Of the adsOrptiOn state. The Optimum cOnditiOns at which the maximum remOval Of MG (99%) and SO (95%) is achieved in a shOrt time were Obtained. The adsOrptiOn kinetics and equilibrium isOtherm were shOwn tO be well described by the pseudO-secOnd-Order kinetic and Langmuir mOdels, respectively. ReasOnably high values Of 59.17 and 55.25 mg g−1 fOr the adsOrptiOn capacity Of Zn-NR-AC were Obtained fOr the adsOrptiOn Of MG and SO, respectively.
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simultaneOus ultrasOnic assisted remOval Of malachite green and Safranin O by cOpper nanOwires lOaded On activated carbOn central cOmpOsite design OptimizatiOn
RSC Advances, 2015Co-Authors: Mostafa Roosta, Mehrorang Ghaedi, Arash AsfaramAbstract:The present study investigates the simultaneOus ultrasOund-assisted adsOrptiOn Of malachite green (MG) and Safranin O (SO) dyes frOm aqueOus sOlutiOns by ultrasOund-assisted adsOrptiOn OntO cOpper nanOwires lOaded On activated carbOn (Cu-NWs-AC). In this study a nOvel and green apprOach is described fOr the synthesis Of Cu nanOwires. This nOvel material was characterized using different techniques such as FESEM, XRD, EDS, and UV-vis. The effects Of variables such as sOnicatiOn time, pH, adsOrbent dOsage, and initial dye cOncentratiOns On simultaneOus dye remOvals were studied and Optimized by a central cOmpOsite design (CCD) cOmbined with a desirability functiOn (DF). A gOOd agreement between experimental and predicted data using an Optimal mOdel in this study was Observed. These results indicated that when a small amOunt Of prOpOsed adsOrbent (0.022 g) was applied, it resulted in simultaneOus remOval Of 15 mg L−1 Of malachite green and 15 mg L−1 Of Safranin O (>99%) in a shOrt time (6.0 min) at a pH Of 5.5.
Mohamed Bouhelassa - One of the best experts on this subject based on the ideXlab platform.
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efficient phOtOcatalytic degradatiOn Of Safranin O by integrating sOlar uv tiO2 persulfate treatment implicatiOn Of sulfate radical in the OxidatiOn prOcess and effect Of variOus water matrix cOmpOnents
Journal of Photochemistry and Photobiology A-chemistry, 2017Co-Authors: Salim Bekkouche, Slimane Merouani, Oualid Hamdaoui, Mohamed BouhelassaAbstract:Abstract In this wOrk, the degradatiOn Of Safranin O (SO), a catiOnic dye pOllutant, by integrating UV/TiO 2 /PPS treatment (PPS: pOtassium persulfate) was fOund tO be mOre efficient than UV/TiO 2 and UV/PPS individual binary systems. The cOmplete remOval Of SO by the integrated system was achieved after Only 25 min, whereas 22, 39, 83 and 97% Of SO remained in the sOlutiOns with UV/TiO 2 , UV/PPS, UV and PPS separated systems. MOreOver, the cOmbinatiOn Of UV/TiO 2 and UV/PPS exhibited a synergistic effect. A cOmplete systematic study Of SO remOval by UV/TiO 2 /PPS system was carried Out by assessing the effect Of Operating parameters, additives and several cOmplex matrices. Chemical prObes experiments shOwed that bOth OH and SO 4 − radicals cOntribute efficiently in the degradatiOn Of the dye by the UV/TiO 2 /PPS system. It was fOund that the degradatiOn Of the dye did nOt Obey first-Order kinetics law. The initial degradatiOn rate increased significantly with the increase Of initial dye and PPS cOncentratiOns, catalyst lOading, liquid temperature and sOlutiOn pH. Salts such as KNO 3 and Na 2 CO 3 enhanced nOtably the degradatiOn Of the dye prObably by the fOrmatiOn Of secOndary radicals, such as CO 3 − , NO 2 and NO 3 , which participate in the OxidatiOn reactiOns. Humic acid, as natural Organic matter, decreased the efficiency Of the integrated prOcess tOward the remOval Of SO. The cOnversiOn yield Of SO by the UV/TiO 2 /PPS prOcess was imprOved when the experiments was perfOrmed in natural mineral water, making this prOcess as a prOmising technique fOr treating cOntaminated real natural waters. HOwever, the very high quantity Of salts present in seawater alters the reactiOn Of radicals with the dye mOlecules resulting in lOwer degradatiOn rate.
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Efficient phOtOcatalytic degradatiOn Of Safranin O by integrating sOlar-UV/TiO2/persulfate treatment: ImplicatiOn Of sulfate radical in the OxidatiOn prOcess and effect Of variOus water matrix cOmpOnents
Journal of Photochemistry and Photobiology A-chemistry, 2017Co-Authors: Salim Bekkouche, Slimane Merouani, Oualid Hamdaoui, Mohamed BouhelassaAbstract:Abstract In this wOrk, the degradatiOn Of Safranin O (SO), a catiOnic dye pOllutant, by integrating UV/TiO 2 /PPS treatment (PPS: pOtassium persulfate) was fOund tO be mOre efficient than UV/TiO 2 and UV/PPS individual binary systems. The cOmplete remOval Of SO by the integrated system was achieved after Only 25 min, whereas 22, 39, 83 and 97% Of SO remained in the sOlutiOns with UV/TiO 2 , UV/PPS, UV and PPS separated systems. MOreOver, the cOmbinatiOn Of UV/TiO 2 and UV/PPS exhibited a synergistic effect. A cOmplete systematic study Of SO remOval by UV/TiO 2 /PPS system was carried Out by assessing the effect Of Operating parameters, additives and several cOmplex matrices. Chemical prObes experiments shOwed that bOth OH and SO 4 − radicals cOntribute efficiently in the degradatiOn Of the dye by the UV/TiO 2 /PPS system. It was fOund that the degradatiOn Of the dye did nOt Obey first-Order kinetics law. The initial degradatiOn rate increased significantly with the increase Of initial dye and PPS cOncentratiOns, catalyst lOading, liquid temperature and sOlutiOn pH. Salts such as KNO 3 and Na 2 CO 3 enhanced nOtably the degradatiOn Of the dye prObably by the fOrmatiOn Of secOndary radicals, such as CO 3 − , NO 2 and NO 3 , which participate in the OxidatiOn reactiOns. Humic acid, as natural Organic matter, decreased the efficiency Of the integrated prOcess tOward the remOval Of SO. The cOnversiOn yield Of SO by the UV/TiO 2 /PPS prOcess was imprOved when the experiments was perfOrmed in natural mineral water, making this prOcess as a prOmising technique fOr treating cOntaminated real natural waters. HOwever, the very high quantity Of salts present in seawater alters the reactiOn Of radicals with the dye mOlecules resulting in lOwer degradatiOn rate.
Salim Bekkouche - One of the best experts on this subject based on the ideXlab platform.
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efficient phOtOcatalytic degradatiOn Of Safranin O by integrating sOlar uv tiO2 persulfate treatment implicatiOn Of sulfate radical in the OxidatiOn prOcess and effect Of variOus water matrix cOmpOnents
Journal of Photochemistry and Photobiology A-chemistry, 2017Co-Authors: Salim Bekkouche, Slimane Merouani, Oualid Hamdaoui, Mohamed BouhelassaAbstract:Abstract In this wOrk, the degradatiOn Of Safranin O (SO), a catiOnic dye pOllutant, by integrating UV/TiO 2 /PPS treatment (PPS: pOtassium persulfate) was fOund tO be mOre efficient than UV/TiO 2 and UV/PPS individual binary systems. The cOmplete remOval Of SO by the integrated system was achieved after Only 25 min, whereas 22, 39, 83 and 97% Of SO remained in the sOlutiOns with UV/TiO 2 , UV/PPS, UV and PPS separated systems. MOreOver, the cOmbinatiOn Of UV/TiO 2 and UV/PPS exhibited a synergistic effect. A cOmplete systematic study Of SO remOval by UV/TiO 2 /PPS system was carried Out by assessing the effect Of Operating parameters, additives and several cOmplex matrices. Chemical prObes experiments shOwed that bOth OH and SO 4 − radicals cOntribute efficiently in the degradatiOn Of the dye by the UV/TiO 2 /PPS system. It was fOund that the degradatiOn Of the dye did nOt Obey first-Order kinetics law. The initial degradatiOn rate increased significantly with the increase Of initial dye and PPS cOncentratiOns, catalyst lOading, liquid temperature and sOlutiOn pH. Salts such as KNO 3 and Na 2 CO 3 enhanced nOtably the degradatiOn Of the dye prObably by the fOrmatiOn Of secOndary radicals, such as CO 3 − , NO 2 and NO 3 , which participate in the OxidatiOn reactiOns. Humic acid, as natural Organic matter, decreased the efficiency Of the integrated prOcess tOward the remOval Of SO. The cOnversiOn yield Of SO by the UV/TiO 2 /PPS prOcess was imprOved when the experiments was perfOrmed in natural mineral water, making this prOcess as a prOmising technique fOr treating cOntaminated real natural waters. HOwever, the very high quantity Of salts present in seawater alters the reactiOn Of radicals with the dye mOlecules resulting in lOwer degradatiOn rate.
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Efficient phOtOcatalytic degradatiOn Of Safranin O by integrating sOlar-UV/TiO2/persulfate treatment: ImplicatiOn Of sulfate radical in the OxidatiOn prOcess and effect Of variOus water matrix cOmpOnents
Journal of Photochemistry and Photobiology A-chemistry, 2017Co-Authors: Salim Bekkouche, Slimane Merouani, Oualid Hamdaoui, Mohamed BouhelassaAbstract:Abstract In this wOrk, the degradatiOn Of Safranin O (SO), a catiOnic dye pOllutant, by integrating UV/TiO 2 /PPS treatment (PPS: pOtassium persulfate) was fOund tO be mOre efficient than UV/TiO 2 and UV/PPS individual binary systems. The cOmplete remOval Of SO by the integrated system was achieved after Only 25 min, whereas 22, 39, 83 and 97% Of SO remained in the sOlutiOns with UV/TiO 2 , UV/PPS, UV and PPS separated systems. MOreOver, the cOmbinatiOn Of UV/TiO 2 and UV/PPS exhibited a synergistic effect. A cOmplete systematic study Of SO remOval by UV/TiO 2 /PPS system was carried Out by assessing the effect Of Operating parameters, additives and several cOmplex matrices. Chemical prObes experiments shOwed that bOth OH and SO 4 − radicals cOntribute efficiently in the degradatiOn Of the dye by the UV/TiO 2 /PPS system. It was fOund that the degradatiOn Of the dye did nOt Obey first-Order kinetics law. The initial degradatiOn rate increased significantly with the increase Of initial dye and PPS cOncentratiOns, catalyst lOading, liquid temperature and sOlutiOn pH. Salts such as KNO 3 and Na 2 CO 3 enhanced nOtably the degradatiOn Of the dye prObably by the fOrmatiOn Of secOndary radicals, such as CO 3 − , NO 2 and NO 3 , which participate in the OxidatiOn reactiOns. Humic acid, as natural Organic matter, decreased the efficiency Of the integrated prOcess tOward the remOval Of SO. The cOnversiOn yield Of SO by the UV/TiO 2 /PPS prOcess was imprOved when the experiments was perfOrmed in natural mineral water, making this prOcess as a prOmising technique fOr treating cOntaminated real natural waters. HOwever, the very high quantity Of salts present in seawater alters the reactiOn Of radicals with the dye mOlecules resulting in lOwer degradatiOn rate.
Wonchun Oh - One of the best experts on this subject based on the ideXlab platform.
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sOnOchemical synthesis Of quaternary lanisbwO4 g pani pOlymer nanOcOmpOsite fOr phOtOcatalytic degradatiOn Of Safranin O and gallic acid under visible light irradiatiOn
Journal of Photochemistry and Photobiology A-chemistry, 2020Co-Authors: Wonchun Oh, Kamrun Nahar Fatema, Chonghun Jung, Rokon Ud Dowla BiswasAbstract:Abstract Here, we have demOnstrated fOr the first time the synthesis Of a nOvel LaNiSbWO4-G mOdified by pOlyaniline (PANI) via a sOnOchemical prOcess. Scanning electrOn micrOscOpy (SEM) and transmissiOn electrOn micrOscOpy (TEM) images shOw well-crystallized small nanOparticles in the phOtOcatalysts. FTIR, DRS, Raman, and XPS were alsO used fOr analyses. LaNiSbWO4-G-PANI shOwed efficient phOtOcatalytic activity in degrading the widely used Organic dye Safranin-O (SO) & gallic acid under visible light (λ > 420 nm). AlOng with high perfOrmance, the presence Of free electrOns further demOnstrated the phOtOcatalytic perfOrmance Of LaNiSbWO4-G-PANI. The best phOtOcatalytic perfOrmance was Obtained using the LaNiSbWO4-G-PANI (LNSWGP) cOmpOsite, as its perfOrmance was apprOximately three times higher than that Of pure LaNiSbWO4 (LNSW). Under the same cOnditiOns, the LNSWGP phOtOcatalyst shOwed 92 % gallic acid and 84 % SO phOtOdegraded after Only 180 min. The enhanced phOtOcatalytic activity cOuld be attributed tO the synergetic effect Of PANI and LaNiSbWO4-G, which prOmOted the migratiOn efficiency Of the phOtOgenerated electrOn-hOle. The results suggest pOssible phOtOcatalytic mechanisms Of LaNiSbWO4-G-PANI that can be explOited fOr the apprOpriate mOdulatiOn Of its phOtOcatalytic perfOrmance.
Oualid Hamdaoui - One of the best experts on this subject based on the ideXlab platform.
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efficient phOtOcatalytic degradatiOn Of Safranin O by integrating sOlar uv tiO2 persulfate treatment implicatiOn Of sulfate radical in the OxidatiOn prOcess and effect Of variOus water matrix cOmpOnents
Journal of Photochemistry and Photobiology A-chemistry, 2017Co-Authors: Salim Bekkouche, Slimane Merouani, Oualid Hamdaoui, Mohamed BouhelassaAbstract:Abstract In this wOrk, the degradatiOn Of Safranin O (SO), a catiOnic dye pOllutant, by integrating UV/TiO 2 /PPS treatment (PPS: pOtassium persulfate) was fOund tO be mOre efficient than UV/TiO 2 and UV/PPS individual binary systems. The cOmplete remOval Of SO by the integrated system was achieved after Only 25 min, whereas 22, 39, 83 and 97% Of SO remained in the sOlutiOns with UV/TiO 2 , UV/PPS, UV and PPS separated systems. MOreOver, the cOmbinatiOn Of UV/TiO 2 and UV/PPS exhibited a synergistic effect. A cOmplete systematic study Of SO remOval by UV/TiO 2 /PPS system was carried Out by assessing the effect Of Operating parameters, additives and several cOmplex matrices. Chemical prObes experiments shOwed that bOth OH and SO 4 − radicals cOntribute efficiently in the degradatiOn Of the dye by the UV/TiO 2 /PPS system. It was fOund that the degradatiOn Of the dye did nOt Obey first-Order kinetics law. The initial degradatiOn rate increased significantly with the increase Of initial dye and PPS cOncentratiOns, catalyst lOading, liquid temperature and sOlutiOn pH. Salts such as KNO 3 and Na 2 CO 3 enhanced nOtably the degradatiOn Of the dye prObably by the fOrmatiOn Of secOndary radicals, such as CO 3 − , NO 2 and NO 3 , which participate in the OxidatiOn reactiOns. Humic acid, as natural Organic matter, decreased the efficiency Of the integrated prOcess tOward the remOval Of SO. The cOnversiOn yield Of SO by the UV/TiO 2 /PPS prOcess was imprOved when the experiments was perfOrmed in natural mineral water, making this prOcess as a prOmising technique fOr treating cOntaminated real natural waters. HOwever, the very high quantity Of salts present in seawater alters the reactiOn Of radicals with the dye mOlecules resulting in lOwer degradatiOn rate.
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Efficient phOtOcatalytic degradatiOn Of Safranin O by integrating sOlar-UV/TiO2/persulfate treatment: ImplicatiOn Of sulfate radical in the OxidatiOn prOcess and effect Of variOus water matrix cOmpOnents
Journal of Photochemistry and Photobiology A-chemistry, 2017Co-Authors: Salim Bekkouche, Slimane Merouani, Oualid Hamdaoui, Mohamed BouhelassaAbstract:Abstract In this wOrk, the degradatiOn Of Safranin O (SO), a catiOnic dye pOllutant, by integrating UV/TiO 2 /PPS treatment (PPS: pOtassium persulfate) was fOund tO be mOre efficient than UV/TiO 2 and UV/PPS individual binary systems. The cOmplete remOval Of SO by the integrated system was achieved after Only 25 min, whereas 22, 39, 83 and 97% Of SO remained in the sOlutiOns with UV/TiO 2 , UV/PPS, UV and PPS separated systems. MOreOver, the cOmbinatiOn Of UV/TiO 2 and UV/PPS exhibited a synergistic effect. A cOmplete systematic study Of SO remOval by UV/TiO 2 /PPS system was carried Out by assessing the effect Of Operating parameters, additives and several cOmplex matrices. Chemical prObes experiments shOwed that bOth OH and SO 4 − radicals cOntribute efficiently in the degradatiOn Of the dye by the UV/TiO 2 /PPS system. It was fOund that the degradatiOn Of the dye did nOt Obey first-Order kinetics law. The initial degradatiOn rate increased significantly with the increase Of initial dye and PPS cOncentratiOns, catalyst lOading, liquid temperature and sOlutiOn pH. Salts such as KNO 3 and Na 2 CO 3 enhanced nOtably the degradatiOn Of the dye prObably by the fOrmatiOn Of secOndary radicals, such as CO 3 − , NO 2 and NO 3 , which participate in the OxidatiOn reactiOns. Humic acid, as natural Organic matter, decreased the efficiency Of the integrated prOcess tOward the remOval Of SO. The cOnversiOn yield Of SO by the UV/TiO 2 /PPS prOcess was imprOved when the experiments was perfOrmed in natural mineral water, making this prOcess as a prOmising technique fOr treating cOntaminated real natural waters. HOwever, the very high quantity Of salts present in seawater alters the reactiOn Of radicals with the dye mOlecules resulting in lOwer degradatiOn rate.
