The effect of electrocoagulation (EC) on total arsenic, arsenite (As3+) and arsenate (As5+) species removal from model groundwater investigating toxicity and sludge characteristic
Abstract This study showed that the model groundwater containing As3+ and As5+ species was successfully treated with electrocoagulation (EC) first time in the literature investigating toxicity reduction, inorganic arsenic species and detailed sludge characterization. The arsenic removal from model g...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-04-01
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| Series: | Applied Water Science |
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| Online Access: | https://doi.org/10.1007/s13201-022-01660-0 |
| _version_ | 1817988956077162496 |
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| author | Tuğçe Demirel Fadime Karaer Özmen Yusuf Yavuz Ali Savaş Koparal |
| author_facet | Tuğçe Demirel Fadime Karaer Özmen Yusuf Yavuz Ali Savaş Koparal |
| author_sort | Tuğçe Demirel |
| collection | DOAJ |
| description | Abstract This study showed that the model groundwater containing As3+ and As5+ species was successfully treated with electrocoagulation (EC) first time in the literature investigating toxicity reduction, inorganic arsenic species and detailed sludge characterization. The arsenic removal from model groundwater with 1000 µg/l total arsenic containing equal arsenite (As3+) and arsenate (As5+) concentration was examined by the EC treatment optimized with following parameters; current density (5.0, 7.5 and 10.0 mA/cm2) supporting sodium sulfate electrolyte amount (10, 20 and 30 mM Na2SO4) and initial water pH (3, 6 and 9). In EC treatment, the 99.87% arsenic removal was obtained with 10 mA/cm2, 10 mM Na2SO4 at pH 3 after 40 min supplying 1.44 μg/l effluent As concentration lower than the WHO limit for drinking water. Through transformation mechanisms of more toxic As3+ to less toxic and easily settled As5+ according to As speciation analysis, the toxicity of the model groundwater was successfully decreased in parallel with total arsenic, As3+ and As5+ removal during EC. The precipitated Al(OH)3 and Al2O3 coagulants were the main peaks in the FTIR-ATR spectrum as well as As(III)–O vibration observed between 717 and 721 cm−1 peaks and As(V)–O vibration dominated 899 and 972 cm−1 peaks were detected in the produced sludge after the EC. The SEM–EDS morphological analysis was demonstrated that the sludge was consisted of mostly amorphous structure aggregated size range of 200 μm–2 mm, relatively uniform cake including O, Al, As, Na, and S. |
| first_indexed | 2024-04-14T00:41:12Z |
| format | Article |
| id | doaj.art-1898dd10cb5b4642a72f07a39f9b890d |
| institution | Directory Open Access Journal |
| issn | 2190-5487 2190-5495 |
| language | English |
| last_indexed | 2024-04-14T00:41:12Z |
| publishDate | 2022-04-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Applied Water Science |
| spelling | doaj.art-1898dd10cb5b4642a72f07a39f9b890d2022-12-22T02:22:11ZengSpringerOpenApplied Water Science2190-54872190-54952022-04-0112611310.1007/s13201-022-01660-0The effect of electrocoagulation (EC) on total arsenic, arsenite (As3+) and arsenate (As5+) species removal from model groundwater investigating toxicity and sludge characteristicTuğçe Demirel0Fadime Karaer Özmen1Yusuf Yavuz2Ali Savaş Koparal3Environmental Engineering Department, Engineering Faculty, Eskisehir Technical UniversityEnvironmental Engineering Department, Engineering Faculty, Eskisehir Technical UniversityEnvironmental Engineering Department, Engineering Faculty, Eskisehir Technical UniversityHealth Programs Department, Open Education Faculty, Anadolu UniversityAbstract This study showed that the model groundwater containing As3+ and As5+ species was successfully treated with electrocoagulation (EC) first time in the literature investigating toxicity reduction, inorganic arsenic species and detailed sludge characterization. The arsenic removal from model groundwater with 1000 µg/l total arsenic containing equal arsenite (As3+) and arsenate (As5+) concentration was examined by the EC treatment optimized with following parameters; current density (5.0, 7.5 and 10.0 mA/cm2) supporting sodium sulfate electrolyte amount (10, 20 and 30 mM Na2SO4) and initial water pH (3, 6 and 9). In EC treatment, the 99.87% arsenic removal was obtained with 10 mA/cm2, 10 mM Na2SO4 at pH 3 after 40 min supplying 1.44 μg/l effluent As concentration lower than the WHO limit for drinking water. Through transformation mechanisms of more toxic As3+ to less toxic and easily settled As5+ according to As speciation analysis, the toxicity of the model groundwater was successfully decreased in parallel with total arsenic, As3+ and As5+ removal during EC. The precipitated Al(OH)3 and Al2O3 coagulants were the main peaks in the FTIR-ATR spectrum as well as As(III)–O vibration observed between 717 and 721 cm−1 peaks and As(V)–O vibration dominated 899 and 972 cm−1 peaks were detected in the produced sludge after the EC. The SEM–EDS morphological analysis was demonstrated that the sludge was consisted of mostly amorphous structure aggregated size range of 200 μm–2 mm, relatively uniform cake including O, Al, As, Na, and S.https://doi.org/10.1007/s13201-022-01660-0GroundwaterArsenicElectrocoagulationArsenic specificationToxicitySludge characterization |
| spellingShingle | Tuğçe Demirel Fadime Karaer Özmen Yusuf Yavuz Ali Savaş Koparal The effect of electrocoagulation (EC) on total arsenic, arsenite (As3+) and arsenate (As5+) species removal from model groundwater investigating toxicity and sludge characteristic Applied Water Science Groundwater Arsenic Electrocoagulation Arsenic specification Toxicity Sludge characterization |
| title | The effect of electrocoagulation (EC) on total arsenic, arsenite (As3+) and arsenate (As5+) species removal from model groundwater investigating toxicity and sludge characteristic |
| title_full | The effect of electrocoagulation (EC) on total arsenic, arsenite (As3+) and arsenate (As5+) species removal from model groundwater investigating toxicity and sludge characteristic |
| title_fullStr | The effect of electrocoagulation (EC) on total arsenic, arsenite (As3+) and arsenate (As5+) species removal from model groundwater investigating toxicity and sludge characteristic |
| title_full_unstemmed | The effect of electrocoagulation (EC) on total arsenic, arsenite (As3+) and arsenate (As5+) species removal from model groundwater investigating toxicity and sludge characteristic |
| title_short | The effect of electrocoagulation (EC) on total arsenic, arsenite (As3+) and arsenate (As5+) species removal from model groundwater investigating toxicity and sludge characteristic |
| title_sort | effect of electrocoagulation ec on total arsenic arsenite as3 and arsenate as5 species removal from model groundwater investigating toxicity and sludge characteristic |
| topic | Groundwater Arsenic Electrocoagulation Arsenic specification Toxicity Sludge characterization |
| url | https://doi.org/10.1007/s13201-022-01660-0 |
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