1
|
Mohamed AM, Abdelwahab SM, Elsawy NM, Ahmed NA, Raafat AI. E-beam irradiation-induced synthesis of hydroxyethyl cellulose/(Cu 2O-rGO)/BiVO 4-based nanocomposite for photocatalytic remediation of wastewater under visible light. Int J Biol Macromol 2024; 258:128681. [PMID: 38081488 DOI: 10.1016/j.ijbiomac.2023.128681] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/27/2023] [Accepted: 12/06/2023] [Indexed: 12/25/2023]
Abstract
Using E-beam irradiation as an eco-friendly technique for initiation and crosslinking, a series of Hydroxyethyl Cellulose-poly vinyl alcohol copolymer hydrogels were synthesized as templates for cuprous oxide (Cu2O), reduced graphene oxide (rGO) and bismuth vanadate (BiVO4) nanoparticles to be used as nanocomposites photocatalysts for methylene blue (MB) dye decolorization using visible light. Preparation conditions were optimized to ensure the construction of a good network architecture and therefore the highest gelation degree. For the preparation of (Cu2O@rGO)/BiVO4 nanocomposites, a series of rGO was decorated by Cu2O using the precipitation method, followed by mixing with BiVO4 which was synthesized hydrothermally. (EDX), (XRD), (TEM), and (SEM) were used for nanoparticle characterization. The thermal characteristics of the fabricated nanocomposites were evaluated using thermal gravimetric analysis. The presence of rGO enhanced the decolorization efficiency of MB about 20 % higher than that of (HEC-PVA)/Cu2O which achieves only (59 %) decolorization efficiency. After the addition of BiVO4 NPs, the decolorization efficiency increased to reach 90 % after 150 min at pH 11 using a 10 ppm MB solution. The developed (HEC-PVA)/(Cu2O@rGO)/BiVO4 photocatalyst exhibits efficient reusability for 5 cycles. Treated dyed water shows a germination index (GI) of 82 % suggesting its suitability for irrigation of playgrounds and gardens.
Collapse
Affiliation(s)
- Asmaa M Mohamed
- Polymer Chemistry Department, National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority, Cairo, Egypt.
| | - S M Abdelwahab
- Chemistry Department, Faculty of Science, Ain shams University, Cairo, Egypt
| | - Naeem M Elsawy
- Polymer Chemistry Department, National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority, Cairo, Egypt
| | - Nehad A Ahmed
- Polymer Chemistry Department, National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority, Cairo, Egypt
| | - Amany I Raafat
- Polymer Chemistry Department, National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority, Cairo, Egypt
| |
Collapse
|
2
|
Elgoud EMA, Ismail ZH, El-Nadi YA, Abdelwahab SM, Aly HF. Erratum to: Solid–Liquid Extraction of Rare Earth Elements Ce(IV), Pr(III), Er(III), and Y(III) from Concentrated Phosphoric Acid Solutions Using Strongly Acidic Cation Exchange Resin (SQS–6). RUSS J APPL CHEM+ 2022. [DOI: 10.1134/s1070427222060143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
3
|
Elgoud EMA, Ismail ZH, El-Nadi YA, Abdelwahab SM, Aly HF. Solid–Liquid Extraction of Rare Earth Elements Ce(IV), Pr(III), Er(III), and Y(III) from Concentrated Phosphoric Acid Solutions Using Strongly Acidic Cation Exchange Resin (SQS–6). RUSS J APPL CHEM+ 2022. [DOI: 10.1134/s1070427222040176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
4
|
Sayed MA, Aly HF, Mahmoud HH, Abdelwahab SM, Helal AI, Wilson LD. Design of hybrid goethite nanocomposites as potential sorbents for lanthanum from aqueous media. SEP SCI TECHNOL 2020. [DOI: 10.1080/01496395.2020.1853168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Moubarak A. Sayed
- Central Laboratory for Elemental and Isotopic Analysis, Nuclear Research Center, Egyptian Atomic Energy Authority, Cairo, Egypt
- Hot Laboratories Center, Egyptian Atomic Energy Authority, Cairo, Inshas, 13759, Egypt
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan, Canada
| | - H. F. Aly
- Hot Laboratories Center, Egyptian Atomic Energy Authority, Cairo, Inshas, 13759, Egypt
| | - H. H. Mahmoud
- Central Laboratory for Elemental and Isotopic Analysis, Nuclear Research Center, Egyptian Atomic Energy Authority, Cairo, Egypt
- Radioisotope Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Giza, Egypt
| | - S. M. Abdelwahab
- Chemistry Department, Faculty of Science, Ain-Shams University, Cairo, Egypt
| | - A. I. Helal
- Central Laboratory for Elemental and Isotopic Analysis, Nuclear Research Center, Egyptian Atomic Energy Authority, Cairo, Egypt
| | - Lee D. Wilson
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan, Canada
| |
Collapse
|
5
|
Abu Elgoud EM, Ismail ZH, Ahmad MI, El-Nadi YA, Abdelwahab SM, Aly HF. Erratum to: Sorption of Lanthanum(III) and Neodymium(III) from Concentrated Phosphoric Acid by Strongly Acidic Cation Exchange Resin (SQS-6). RUSS J APPL CHEM+ 2020. [DOI: 10.1134/s1070427219120290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
6
|
Affiliation(s)
| | | | | | | | | | - S M Abdelwahab
- Department of Rheumatology, Faculty of Medicine, Zagazig University , Zagazig, Egypt
| |
Collapse
|
7
|
Abu Elgoud EM, Ismail ZH, Ahmad MI, El-Nadi YA, Abdelwahab SM, Aly HF. Sorption of Lanthanum(III) and Neodymium(III) from Concentrated Phosphoric Acid by Strongly Acidic Cation Exchange Resin (SQS-6). RUSS J APPL CHEM+ 2020. [DOI: 10.1134/s1070427219110156] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
8
|
Sayed MA, Helal AI, Abdelwahab SM, Mahmoud HH, Aly HF. Sorption and possible preconcentration of europium and gadolinium ions from aqueous solutions by Mn3O4 nanoparticles. Chem Pap 2019. [DOI: 10.1007/s11696-019-00906-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
|
9
|
Zawawi TH, al-Hadramy MS, Abdelwahab SM. The effects of therapy with rifampicin and isoniazid on basic investigations for Cushing's syndrome. Ir J Med Sci 1996; 165:300-2. [PMID: 8990663 DOI: 10.1007/bf02943098] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Rifampicin(R) is a potent enzyme inducer which is now widely used to treat many conditions. We have investigated its effect on adrenal function tests in 18 adults with tuberculosis on rifampicin (R) and isoniazid (INH) as in-patients. Midnight cortisol was above 250 nmol/l in 11 patients with a mean +/- (SD) of 340 +/- 193 nmol/l. The morning serum cortisol following 1 and 4 mg dexamethasone overnight was abnormal in 88.9 per cent and 83.3 per cent respectively. The respective mean values +/- (SD) were 350 +/- 179 and 336 +/- 279 nmol/l. The mean 24-hour urinary free cortisol +/- SD was 513 +/- 375 nmol and was above normal in 6 (33.3 per cent) patients. These results show that midnight cortisol, dexamethasone suppression tests and 24-hour urinary free cortisol are misleading in patients with tuberculosis on (R) and should not be employed for investigating such patients for Cushing's syndrome.
Collapse
Affiliation(s)
- T H Zawawi
- Department of Medicine, King Abdulaziz University Hospital, Jeddah, Saudi Arabia
| | | | | |
Collapse
|
10
|
al-Hadramy MS, Zawawi TH, Abdelwahab SM. Altered cortisol levels in relation to Ramadan. Eur J Clin Nutr 1988; 42:359-62. [PMID: 3396527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
During the month of Muslim fasting (Ramadan) many people alter their sleeping habits and stay awake most of the night. We investigated the effect of this alteration on morning and midnight cortisol levels in 10 healthy adults in their homes. Four of the subjects showed alteration of the cortisol rhythm during the last 2 weeks of fasting with reversal of the morning/midnight ratio in some values. One lady was admitted for 24-h cortisol profile on Day 15 of Ramadan when the acrophase and nadir showed a forward shift by about 5-6 h, consistent with the shift of the subject's sleep. The morning cortisol returned to normal in all subjects 4 weeks after Ramadan. However, the midnight value was above 250 nmol/l in three of the subjects who exhibited the alteration during Ramadan. These findings suggest that single-point cortisol values can be misleading in many Muslin countries during or shortly after Ramadan.
Collapse
Affiliation(s)
- M S al-Hadramy
- Department of Medicine, Abdulaziz University Hospital, Jeddah, Saudi Arabia
| | | | | |
Collapse
|
11
|
Hamza YO, Abdalla RE, Ahmed MA, Abdelwahab SM, Omer A, Abdelnur OM, El Hassan AM. Northward spread of visceral leishmaniasis in the Sudan. Trans R Soc Trop Med Hyg 1976; 70:266. [PMID: 982530 DOI: 10.1016/0035-9203(76)90067-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
|