Removal of Methylene Blue from a synthetic effluent by ionic flocculation
Methylene Blue (MB) is a dye widely used in the industrial sector and in human and veterinary pharmacology. This dye, if improperly disposed of, can cause a significant environmental impact due to its low biodegradability, as it is a stable and complex substance. Additionally, it may affect human he...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-10-01
|
| Series: | Heliyon |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844022021569 |
| _version_ | 1811247793816207360 |
|---|---|
| author | Yago Neco Teixeira Francisco José de Paula Filho Vinícius Pereira Bacurau Jorge Marcell Coelho Menezes Anderson Zhong Fan Ricardo Paulo Fonseca Melo |
| author_facet | Yago Neco Teixeira Francisco José de Paula Filho Vinícius Pereira Bacurau Jorge Marcell Coelho Menezes Anderson Zhong Fan Ricardo Paulo Fonseca Melo |
| author_sort | Yago Neco Teixeira |
| collection | DOAJ |
| description | Methylene Blue (MB) is a dye widely used in the industrial sector and in human and veterinary pharmacology. This dye, if improperly disposed of, can cause a significant environmental impact due to its low biodegradability, as it is a stable and complex substance. Additionally, it may affect human health and generate highly toxic byproducts. Hence, the purpose of this work is to assess the removal efficiency of MB from a synthetic effluent using a ionic flocculation process. Such a process consists of the dissolution of a biodegradable anionic surfactant (obtained from soybean oil used for frying food) in the synthetic effluent and the subsequent addition of calcium to the system. The addition of Ca leads to the formation of insoluble surfactant flocs with a high capacity to adsorb organic pollutants. The FTIR testing showed the presence of OH− and C=O groups in the surfactant flocs, which favor the removal of MB by an adsorption process. The maximum adsorption capacity of MB was 101.38 mg g−1. The process is in fact a chemisorption and has an exothermic nature. Desorption studies showed a desorption efficiency of up to 47.81% using an ethanol 1:2 solution. An MB removal efficiency of up to 93.71% was attained in just 0.5 min for an initial MB concentration of 100 mg L−1, showing that ionic flocculation is a very fast and effective process for the treatment of effluents. |
| first_indexed | 2024-04-12T15:15:43Z |
| format | Article |
| id | doaj.art-e135cd5ea3434d4ca29484738859b93d |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-04-12T15:15:43Z |
| publishDate | 2022-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-e135cd5ea3434d4ca29484738859b93d2022-12-22T03:27:38ZengElsevierHeliyon2405-84402022-10-01810e10868Removal of Methylene Blue from a synthetic effluent by ionic flocculationYago Neco Teixeira0Francisco José de Paula Filho1Vinícius Pereira Bacurau2Jorge Marcell Coelho Menezes3Anderson Zhong Fan4Ricardo Paulo Fonseca Melo5Agrarian Sciences and Biodiversity Center, Federal University of Cariri, Ícaro Moreira de Sousa St, 126, 63130-025, Crato, Ceará, Brazil; Science and Technology Center, Federal University of Cariri, Av. Ten. Raimundo Rocha, 1639, 63048-080, Juazeiro do Norte, Ceará, BrazilAgrarian Sciences and Biodiversity Center, Federal University of Cariri, Ícaro Moreira de Sousa St, 126, 63130-025, Crato, Ceará, Brazil; Science and Technology Center, Federal University of Cariri, Av. Ten. Raimundo Rocha, 1639, 63048-080, Juazeiro do Norte, Ceará, Brazil; Corresponding author.Materials Engineering Department, Federal University of São Carlos, Rod. Washington Luiz, 235, 13565-905, São Carlos, São Paulo, BrazilScience and Technology Center, Federal University of Cariri, Av. Ten. Raimundo Rocha, 1639, 63048-080, Juazeiro do Norte, Ceará, BrazilMaterials Engineering Department, Federal University of São Carlos, Rod. Washington Luiz, 235, 13565-905, São Carlos, São Paulo, BrazilExact and Natural Sciences Department, Federal University of Semi-Árido, BR 226, n-n, 59900-000, Pau dos Ferros, Rio Grande do Norte, BrazilMethylene Blue (MB) is a dye widely used in the industrial sector and in human and veterinary pharmacology. This dye, if improperly disposed of, can cause a significant environmental impact due to its low biodegradability, as it is a stable and complex substance. Additionally, it may affect human health and generate highly toxic byproducts. Hence, the purpose of this work is to assess the removal efficiency of MB from a synthetic effluent using a ionic flocculation process. Such a process consists of the dissolution of a biodegradable anionic surfactant (obtained from soybean oil used for frying food) in the synthetic effluent and the subsequent addition of calcium to the system. The addition of Ca leads to the formation of insoluble surfactant flocs with a high capacity to adsorb organic pollutants. The FTIR testing showed the presence of OH− and C=O groups in the surfactant flocs, which favor the removal of MB by an adsorption process. The maximum adsorption capacity of MB was 101.38 mg g−1. The process is in fact a chemisorption and has an exothermic nature. Desorption studies showed a desorption efficiency of up to 47.81% using an ethanol 1:2 solution. An MB removal efficiency of up to 93.71% was attained in just 0.5 min for an initial MB concentration of 100 mg L−1, showing that ionic flocculation is a very fast and effective process for the treatment of effluents.http://www.sciencedirect.com/science/article/pii/S2405844022021569Methylene BlueSurfactantIonic flocculationAdsorptionDesorption |
| spellingShingle | Yago Neco Teixeira Francisco José de Paula Filho Vinícius Pereira Bacurau Jorge Marcell Coelho Menezes Anderson Zhong Fan Ricardo Paulo Fonseca Melo Removal of Methylene Blue from a synthetic effluent by ionic flocculation Heliyon Methylene Blue Surfactant Ionic flocculation Adsorption Desorption |
| title | Removal of Methylene Blue from a synthetic effluent by ionic flocculation |
| title_full | Removal of Methylene Blue from a synthetic effluent by ionic flocculation |
| title_fullStr | Removal of Methylene Blue from a synthetic effluent by ionic flocculation |
| title_full_unstemmed | Removal of Methylene Blue from a synthetic effluent by ionic flocculation |
| title_short | Removal of Methylene Blue from a synthetic effluent by ionic flocculation |
| title_sort | removal of methylene blue from a synthetic effluent by ionic flocculation |
| topic | Methylene Blue Surfactant Ionic flocculation Adsorption Desorption |
| url | http://www.sciencedirect.com/science/article/pii/S2405844022021569 |
| work_keys_str_mv | AT yagonecoteixeira removalofmethylenebluefromasyntheticeffluentbyionicflocculation AT franciscojosedepaulafilho removalofmethylenebluefromasyntheticeffluentbyionicflocculation AT viniciuspereirabacurau removalofmethylenebluefromasyntheticeffluentbyionicflocculation AT jorgemarcellcoelhomenezes removalofmethylenebluefromasyntheticeffluentbyionicflocculation AT andersonzhongfan removalofmethylenebluefromasyntheticeffluentbyionicflocculation AT ricardopaulofonsecamelo removalofmethylenebluefromasyntheticeffluentbyionicflocculation |