Photodegradation of Phenolic Compounds from Water in the Presence of a Pd-Containing Exhausted Adsorbent
A closed-cycle technology regarding the use of an exhausted Pd-based adsorbent as a photocatalyst in the degradation process of phenol is presented. Pd (II) represents a precious metal of great economic importance. Its obtained from natural sources become more difficult to achieve. Therefore, also c...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-11-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/10/23/8440 |
| _version_ | 1797546589278961664 |
|---|---|
| author | Lavinia Lupa Laura Cocheci Bogdan Trica Adina Coroaba Adriana Popa |
| author_facet | Lavinia Lupa Laura Cocheci Bogdan Trica Adina Coroaba Adriana Popa |
| author_sort | Lavinia Lupa |
| collection | DOAJ |
| description | A closed-cycle technology regarding the use of an exhausted Pd-based adsorbent as a photocatalyst in the degradation process of phenol is presented. Pd (II) represents a precious metal of great economic importance. Its obtained from natural sources become more difficult to achieve. Therefore, also considering the regulations of the “circular economy,” its recovery from secondary sources turn out to be a stringent issue in the last years. Pd(II) ions are removed from aqueous solution through adsorption onto Florisil (an inorganic solid support—magnesium silicate) impregnated with Cyphos IL 101 (trihexyl tetradecyl phosphonium chloride). It was observed that the presence of the ionic liquid (IL) in the adsorbent structure doubles the adsorption efficiency of the studied materials. The newly obtained Pd-based photocatalyst was exhaustively characterized and was used in the degradation process of phenol from aqueous solutions. The phenol degradation process was studied in terms of the nature of the photocatalyst used, time of photodegradation and solid: liquid ratio. It was observed that both the presence of IL and Pd lead to an increase in the efficiency of the phenol degradation process. The new Pd-based photocatalyst could be efficiently used in more cycles of phenol photodegradation processes. When is used as a photocatalyst the Florisil impregnated with IL and loaded with 2 mg/g of Pd, a degree of mineralization of 93.75% is obtained after 180 min of irradiation of a phenol solution having a concentration of 20 mg/L and using a solid:liquid ratio = 1:1. |
| first_indexed | 2024-03-10T14:31:50Z |
| format | Article |
| id | doaj.art-31203c436dba4ea1a34555b14e8b4f18 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T14:31:50Z |
| publishDate | 2020-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-31203c436dba4ea1a34555b14e8b4f182023-11-20T22:28:43ZengMDPI AGApplied Sciences2076-34172020-11-011023844010.3390/app10238440Photodegradation of Phenolic Compounds from Water in the Presence of a Pd-Containing Exhausted AdsorbentLavinia Lupa0Laura Cocheci1Bogdan Trica2Adina Coroaba3Adriana Popa4Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University Timisoara, 6 V. Parvan Blv, RO-300223 Timisoara, RomaniaFaculty of Industrial Chemistry and Environmental Engineering, Politehnica University Timisoara, 6 V. Parvan Blv, RO-300223 Timisoara, RomaniaNational Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM, 202 Spl. Independentei, RO-060021 Bucuresti, RomaniaCentre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry Iasi, Grigore Ghica Voda Alley, No.41 A, 700487 Iasi, RomaniaInstitute of Chemistry Timisoara of Romanian Academy, 24 Mihai Viteazul Blv., RO-300223 Timisoara, RomaniaA closed-cycle technology regarding the use of an exhausted Pd-based adsorbent as a photocatalyst in the degradation process of phenol is presented. Pd (II) represents a precious metal of great economic importance. Its obtained from natural sources become more difficult to achieve. Therefore, also considering the regulations of the “circular economy,” its recovery from secondary sources turn out to be a stringent issue in the last years. Pd(II) ions are removed from aqueous solution through adsorption onto Florisil (an inorganic solid support—magnesium silicate) impregnated with Cyphos IL 101 (trihexyl tetradecyl phosphonium chloride). It was observed that the presence of the ionic liquid (IL) in the adsorbent structure doubles the adsorption efficiency of the studied materials. The newly obtained Pd-based photocatalyst was exhaustively characterized and was used in the degradation process of phenol from aqueous solutions. The phenol degradation process was studied in terms of the nature of the photocatalyst used, time of photodegradation and solid: liquid ratio. It was observed that both the presence of IL and Pd lead to an increase in the efficiency of the phenol degradation process. The new Pd-based photocatalyst could be efficiently used in more cycles of phenol photodegradation processes. When is used as a photocatalyst the Florisil impregnated with IL and loaded with 2 mg/g of Pd, a degree of mineralization of 93.75% is obtained after 180 min of irradiation of a phenol solution having a concentration of 20 mg/L and using a solid:liquid ratio = 1:1.https://www.mdpi.com/2076-3417/10/23/8440palladiumadsorptionionic liquidphenolphotodegradation |
| spellingShingle | Lavinia Lupa Laura Cocheci Bogdan Trica Adina Coroaba Adriana Popa Photodegradation of Phenolic Compounds from Water in the Presence of a Pd-Containing Exhausted Adsorbent Applied Sciences palladium adsorption ionic liquid phenol photodegradation |
| title | Photodegradation of Phenolic Compounds from Water in the Presence of a Pd-Containing Exhausted Adsorbent |
| title_full | Photodegradation of Phenolic Compounds from Water in the Presence of a Pd-Containing Exhausted Adsorbent |
| title_fullStr | Photodegradation of Phenolic Compounds from Water in the Presence of a Pd-Containing Exhausted Adsorbent |
| title_full_unstemmed | Photodegradation of Phenolic Compounds from Water in the Presence of a Pd-Containing Exhausted Adsorbent |
| title_short | Photodegradation of Phenolic Compounds from Water in the Presence of a Pd-Containing Exhausted Adsorbent |
| title_sort | photodegradation of phenolic compounds from water in the presence of a pd containing exhausted adsorbent |
| topic | palladium adsorption ionic liquid phenol photodegradation |
| url | https://www.mdpi.com/2076-3417/10/23/8440 |
| work_keys_str_mv | AT lavinialupa photodegradationofphenoliccompoundsfromwaterinthepresenceofapdcontainingexhaustedadsorbent AT lauracocheci photodegradationofphenoliccompoundsfromwaterinthepresenceofapdcontainingexhaustedadsorbent AT bogdantrica photodegradationofphenoliccompoundsfromwaterinthepresenceofapdcontainingexhaustedadsorbent AT adinacoroaba photodegradationofphenoliccompoundsfromwaterinthepresenceofapdcontainingexhaustedadsorbent AT adrianapopa photodegradationofphenoliccompoundsfromwaterinthepresenceofapdcontainingexhaustedadsorbent |