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Federici Dos Santos D, Moreira WM, de Araújo TP, Martins DCC, Carvalho da Silva Fonseca B, Ostroski IC, de Barros MASD. Novel activated carbon from Magonia pubescens bark: characterization and evaluation of adsorption efficiency. ENVIRONMENTAL TECHNOLOGY 2024; 45:3940-3959. [PMID: 37452562 DOI: 10.1080/09593330.2023.2237659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 07/03/2023] [Indexed: 07/18/2023]
Abstract
In this work, the synthesis of activated carbon from the bark of the Magonia pubescens (known as Tingui) and its efficiency in the removal of diclofenac sodium through batch adsorption tests and physical-chemical characterizations were investigated. The phytotoxicity of this material was also evaluated through germination and root growth of Lactuca sativa seeds. According to the experimental design performed for the synthesis of Tingui carbon, the optimized temperature and residence time for the production of this adsorbent were 550 °C and 120 min, respectively. The equilibrium time was reached in 600 min and the theoretical model that best fitted the kinetic data was the Elovich model. The BET was the best fit for the adsorption isotherm dataThis indicates that the adsorption process of sodium diclofenac by activated carbon can occur by two different mechanisms, monolayer and/or multilayer adsorption, depending on the conditions employed in the process, such as temperature and adsorbate concentration. The thermodynamic study showed that the process was favourable and spontaneous in the temperature range evaluated. Furthermore, the characterizations showed by TG/DTG and FTIR analyses that the temperature throughout the process had a marked impact on the degradation of the organic constituents of the biomass and the appearance of distinct functional groups that contributed to the adsorption process of diclofenac sodium. Finally, the toxicity tests recognized that this adsorbent does not affect the germination of L. sativa species. Thus, this adsorbent may become a novel and viable option to be used in the removal of sodium diclofenac.
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Affiliation(s)
| | | | - Thiago Peixoto de Araújo
- Department of Chemical Engineering, Federal Technological University of Paraná, Ponta Grossa, Brazil
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Lyu M, Zheng J, Coulthard C, Ren J, Zhao Y, Tsang SCE, Chen C, O'Hare D. Core-shell silica@Cu xZnAl LDH catalysts for efficient CO 2 hydrogenation to methanol. Chem Sci 2023; 14:9814-9819. [PMID: 37736646 PMCID: PMC10510760 DOI: 10.1039/d3sc02205f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 08/02/2023] [Indexed: 09/23/2023] Open
Abstract
The efficient production of methanol by reduction of CO2 using green hydrogen is a promising strategy from both a green chemistry and a carbon net zero perspective. Herein, we report the synthesis of well-dispersed core-shell catalyst precursors using silica@CuxZnAl-LDHs that can convert CO2 to methanol. The catalyst precursors can be formed using either a commercially available silica (ES757) or a mesoporous silica (e.g. MCM-48). These hybrid materials show significantly enhanced catalytic performance compared to the equivalent unsupported CuxZnAl LDH precursor. Space-time yields of up to 0.7 gMeOH gcat-1 h-1 under mild operating conditions were observed.
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Affiliation(s)
- Meng Lyu
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford 12 Mansfield Road Oxford OX1 3TA UK +44(0)1865 272686
| | - Jianwei Zheng
- Wolfson Catalysis Centre, Department of Chemistry, University of Oxford Oxford OX1 3QR UK
| | - Claire Coulthard
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford 12 Mansfield Road Oxford OX1 3TA UK +44(0)1865 272686
| | - Jing Ren
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology 100029 Beijing P. R. China
| | - Yufei Zhao
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology 100029 Beijing P. R. China
| | - Shik Chi Edman Tsang
- Wolfson Catalysis Centre, Department of Chemistry, University of Oxford Oxford OX1 3QR UK
| | - Chunping Chen
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford 12 Mansfield Road Oxford OX1 3TA UK +44(0)1865 272686
| | - Dermot O'Hare
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford 12 Mansfield Road Oxford OX1 3TA UK +44(0)1865 272686
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Güçbilmez Y, Yavuz Y, Çalış İ, Yargıç AŞ, Koparal AS. Low temperature synthesis of MCM-48 and its adsorbent capacity for the removal of basic red 29 dye from model solutions. Heliyon 2023; 9:e15659. [PMID: 37180891 PMCID: PMC10172900 DOI: 10.1016/j.heliyon.2023.e15659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 04/15/2023] [Accepted: 04/18/2023] [Indexed: 05/16/2023] Open
Abstract
The low temperature synthesis of MCM-48 was performed and its adsorptive properties were investigated for the first time in literature by studying Basic Red 29 (BR29) dye adsorption from model solutions. The modification of the surface properties and pore structure of silica-based material MCM-48 induced by BR29 adsorption were characterized using XRD, nitrogen physisorption, and SEM methods before and after dye adsorption. The effects of contact time, solution pH, dye concentration, and temperature on the adsorption capacity of MCM-48 were investigated. Different adsorption models and different kinetic models were used, respectively to define the equilibrium data and the kinetics of adsorption. Adsorption data was seen to fit the Langmuir isotherm and the pseudo-second-order kinetic model. In addition, MCM-48 was found to be very successful for the removal of the BR29 dye model solutions, even at an initial dye concentration of 500 mg/L for which the removal efficiency was above 97%.
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Affiliation(s)
- Yeşim Güçbilmez
- Department of Chemical Engineering, ESTU, 26555, Eskisehir, Turkey
- Corresponding author.
| | - Yusuf Yavuz
- Department of Environmental Engineering, ESTU, 26555, Eskisehir, Turkey
| | - İbrahim Çalış
- Central Research Laboratory, Bartın University, 74100, Bartın, Turkey
| | - A. Şeyda Yargıç
- Department of Chemical Engineering, Bilecik Şeyh Edebali University, 11230, Bilecik, Turkey
| | - A. Savaş Koparal
- Department of Health Programs, Anadolu University, 26555, Eskisehir, Turkey
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Akpotu SO, Lawal IA, Diagboya PN, Mtunzi FM, Ofomaja AE. Engineered Geomedia Kaolin Clay-Reduced Graphene Oxide-Polymer Composite for the Remediation of Olaquindox from Water. ACS OMEGA 2022; 7:34054-34065. [PMID: 36188304 PMCID: PMC9520555 DOI: 10.1021/acsomega.2c03253] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 08/23/2022] [Indexed: 05/04/2023]
Abstract
Globally, there is an upsurge in the use of unregulated veterinary pharmaceuticals with enhanced release into the environment, resulting in water pollution, which is difficult to remediate. To address this issue, we synthesized and characterized highly hydrophobic three-dimensional ordered engineered geomedia with multiple channels. Kaolin clay (K) was functionalized with either graphene oxide (GO) synthesized via Tour's method or reduced GO in situ with covalently linked methoxyether polyethylene glycol (GO-PEG) using a simple and easily scalable amidation reaction. This was done to enhance the adsorption of olaquindox, a veterinary antibiotic. The X-ray diffraction profile confirmed the grafting of GO and GO-PEG to kaolin. Morphological analysis revealed the architecture of thin films of GO/GO-PEG grafted on the kaolin surface with extensive porosity. Energy-dispersive X-ray mapping, infra-red spectra, and elemental analysis confirmed the successful synthesis of the engineered geomedia composite of K, GO/rGO, and PEG (KrGO-PEG). Due to multiple surface functional groups of polyamide and amido-carbonic groups on the KrGO-PEG composite, it was suitable for olaquindox adsorption. In batch sorption studies of 0.5XKrO-PEG, the effect of pH (2-10) was negligible but with fast equilibrium time (2-1440 min) at 30 min, while the kinetics and equilibrium data suited the pseudo-second order and Langmuir models, respectively. The maximum adsorption value obtained for the composite was 59.5 mg/g; the higher the GO content, the higher the adsorption. The sorption mechanism was majorly through hydrophobic and π-π interactions. Regenerated/reused adsorbents after 4 cycles had the same efficacy in remediating olaquindox from simulated/real water.
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Affiliation(s)
- Samson O. Akpotu
- Wastewater
Treatment Research Laboratory, Faculty of Applied and Computer Sciences,
Department of Biotechnology and Chemistry, Vaal University of Technology, Vanderbijlpark 1911, South Africa
- . Tel.: +27 837136972
| | - Isiaka A. Lawal
- Chemistry
Department, Faculty of Applied and Computer Science, Vaal University of Technology, Vanderbijlpark Campus, Vanderbijlpark 1911, South Africa
| | - Paul N. Diagboya
- Wastewater
Treatment Research Laboratory, Faculty of Applied and Computer Sciences,
Department of Biotechnology and Chemistry, Vaal University of Technology, Vanderbijlpark 1911, South Africa
| | - Fanyana M. Mtunzi
- Wastewater
Treatment Research Laboratory, Faculty of Applied and Computer Sciences,
Department of Biotechnology and Chemistry, Vaal University of Technology, Vanderbijlpark 1911, South Africa
| | - Augustine E. Ofomaja
- Wastewater
Treatment Research Laboratory, Faculty of Applied and Computer Sciences,
Department of Biotechnology and Chemistry, Vaal University of Technology, Vanderbijlpark 1911, South Africa
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Karegar M, Khodaei MM. Magnetic polyindole-Ag composite for the catalytic reduction and removing of the organic pollutants. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-04043-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Quintero-Jaramillo JA, Carrero-Mantilla JI, Sanabria-González NR. A Review of Caffeine Adsorption Studies onto Various Types of Adsorbents. ScientificWorldJournal 2021; 2021:9998924. [PMID: 34335116 PMCID: PMC8315881 DOI: 10.1155/2021/9998924] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 06/26/2021] [Accepted: 06/30/2021] [Indexed: 12/03/2022] Open
Abstract
A systematic literature review of publications from 2000 to 2020 was carried out to identify research trends on adsorbent materials for the removal of caffeine from aqueous solutions. Publications were retrieved from three databases (Scopus, Web of Science, and Google Scholar). Words "adsorption AND caffeine" were examined into titles, abstracts, and keywords. A brief bibliometric analysis was performed with emphasis on the type of publication and of most cited articles. Materials for the removal of caffeine were classified according to the type of material into three main groups: organic, inorganic, and composites, each of them subdivided into different subgroups consistent with their origin or production. Tables resume for each subgroup of adsorbents the key information: specific surface area, dose, pH, maximum adsorption capacity, and isotherm models for the removal of caffeine. The highest adsorption capacities were achieved by organic adsorbents, specifically those with granular activated carbon (1961.3 mg/g) and grape stalk activated carbon (916.7 mg/g). Phenyl-phosphate-based porous organic polymer (301 mg/g), natural sandy loam sediment (221.2 mg/g), composites of MCM-48 encapsulated graphene oxide (153.8 mg/g), and organically modified clay (143.7 mg/g) showed adsorption capacities lower than those of activated carbons. In some activated carbons, a relation between the specific surface area (SSA) and the maximum adsorption capacity (Q max) was found.
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Affiliation(s)
- Javier Andrés Quintero-Jaramillo
- Departamento de Ingeniería Química, Universidad Nacional de Colombia Sede Manizales, Campus La Nubia, km 7 vía al Aeropuerto, AA 127, Manizales, Colombia
| | - Javier Ignacio Carrero-Mantilla
- Departamento de Ingeniería Química, Universidad Nacional de Colombia Sede Manizales, Campus La Nubia, km 7 vía al Aeropuerto, AA 127, Manizales, Colombia
| | - Nancy Rocío Sanabria-González
- Departamento de Ingeniería Química, Universidad Nacional de Colombia Sede Manizales, Campus La Nubia, km 7 vía al Aeropuerto, AA 127, Manizales, Colombia
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Srivastava V, Zare EN, Makvandi P, Zheng XQ, Iftekhar S, Wu A, Padil VVT, Mokhtari B, Varma RS, Tay FR, Sillanpaa M. Cytotoxic aquatic pollutants and their removal by nanocomposite-based sorbents. CHEMOSPHERE 2020; 258:127324. [PMID: 32544812 DOI: 10.1016/j.chemosphere.2020.127324] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 05/29/2020] [Accepted: 06/02/2020] [Indexed: 06/11/2023]
Abstract
Water is an extremely essential compound for human life and, hence, accessing drinking water is very important all over the world. Nowadays, due to the urbanization and industrialization, several noxious pollutants are discharged into water. Water pollution by various cytotoxic contaminants, e.g. heavy metal ions, drugs, pesticides, dyes, residues a drastic public health issue for human beings; hence, this topic has been receiving much attention for the specific approaches and technologies to remove hazardous contaminants from water and wastewater. In the current review, the cytotoxicity of different sorts of aquatic pollutants for mammalian is presented. In addition, we will overview the recent advances in various nanocomposite-based adsorbents and different approaches of pollutants removal from water/wastewater with several examples to provide a backdrop for future research.
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Affiliation(s)
- Varsha Srivastava
- Department of Chemistry, Indian Institute of Technology, Banaras Hindu University (B.H.U), Varasani 221005, India
| | | | - Pooyan Makvandi
- Institute for Polymers, Composites and Biomaterials, National Research Council, IPCB-CNR, Naples, Italy; Chemistry Department, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz 6153753843, Iran; Department of Medical Nanotechnology, Faculty of Advanced, Technologies in Medicine, Iran University of Medical Sciences, Tehran 14496-14535, Iran
| | - Xuan-Qi Zheng
- Department of Orthopaedics, Bioprinting Research Group, Zhejiang Provincial Key Laboratory of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, 325027, China
| | - Sidra Iftekhar
- Department of Environmental Engineering, University of Engineering and Technology Taxila, Taxila 47050, Pakistan
| | - Aimin Wu
- Department of Orthopaedics, Bioprinting Research Group, Zhejiang Provincial Key Laboratory of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, 325027, China
| | - Vinod V T Padil
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentská 1402/2, 46117 Liberec 1, Czech Republic
| | - Babak Mokhtari
- Chemistry Department, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz 6153753843, Iran
| | - Rajender S Varma
- Regional Centre of Advanced Technologies and Materials, Palacký University in Olomouc, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Franklin R Tay
- College of Graduate Studies, Augusta University, Augusta, GA, USA
| | - Mika Sillanpaa
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Viet Nam; Faculty of Environment and Chemical Engineering, Duy Tan University, Da Nang 550000, Viet Nam; School of Civil Engineering and Surveying, Faculty of Health, Engineering and Sciences, University of Southern Queensland, West Street, Toowoomba, 4350 QLD, Australia; Department of Chemical Engineering, School of Mining, Metallurgy and Chemical Engineering, University of Johannesburg, P. O. Box 17011, Doornfontein 2028, South Africa.
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8
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Akpotu SO, Lawal IA, Moodley B, Ofomaja AE. Covalently linked graphene oxide/reduced graphene oxide-methoxylether polyethylene glycol functionalised silica for scavenging of estrogen: Adsorption performance and mechanism. CHEMOSPHERE 2020; 246:125729. [PMID: 31901661 DOI: 10.1016/j.chemosphere.2019.125729] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 12/17/2019] [Accepted: 12/21/2019] [Indexed: 05/21/2023]
Abstract
Water pollution by pharmaceuticals is a global issue and its remediation is important. To overcome this, we synthesised super hydrophobic nanoporous 3-dimensional ordered nanomaterials with multi-functional binding chemistry for highly efficient adsorption of estrogen (17β-estradiol). Graphene oxide (GO) was synthesised via Tours method and methoxylether polyethylene glycol (mPEG) was covalently introduced onto GO surface via facile amidation mild process to give GO-mPEG. GO-mPEG was anchored on nanoporous SBA-15 and homogenously reduced in-situ to SBA-rGO-mPEG. XRD analysis confirmed successful synthesis of SBA-15 and cross-linked GO/rGO-mPEG on SBA-15 surface. Image analysis revealed the architecture of SBA-15 as porous 3-dimensional silica network and presence of interwoven/crosslinked thin-films of GO-mPEG on SBA-15 surface. EDX mapping/elemental analysis showed expected elements were present. FTIR and textural analysis revealed the presence of different functional groups and high surface area as well as porosity, respectively. Optimal molar ratio experiments showed that 0.5SBA-rGO-mPEG had the highest sorption capacity. The relatively large surface area, 3-dimensional nanoprous silica structure and excess of polyamide/amido-carbonic functional groups on nanocomposites were suited for adsorption of 17β-estradiol. Equilibrium time was 30 min and effect of pH on adsorption was negligible. Sorption kinetic process of SBA-rGO-mPEG suited the pseudo-second-order model and equilibrium data fitted both Freundlich and Langmuir models. Qm values of 57.1, 78.5, 102.6 and 192.3 mg/g was recorded for SBA-GO, 0.1SBA-rGO-mPEG, 0.25SBA-rGO-mPEG and 0.5SBA-rGO-mPEG, respectively. H-bond, hydrophobic and π-π interactions were the sorption mechanism of SBA-rGO-mPEG after detailed analysis of data. Adsorbents was regenerated/re-used after 4 cycles with high remediation from environmental/real water samples.
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Affiliation(s)
- Samson O Akpotu
- Wastewater Treatment Research Laboratory, Faculty of Applied and Computer Sciences, Department of Chemistry, Vaal University of Technology, Vanderbijlpark, 1911, South Africa.
| | - Isiaka A Lawal
- Wastewater Treatment Research Laboratory, Faculty of Applied and Computer Sciences, Department of Chemistry, Vaal University of Technology, Vanderbijlpark, 1911, South Africa
| | - Brenda Moodley
- School of Chemistry and Physics, University of Kwazulu-Natal, Durban, 4000, South Africa
| | - Augustine E Ofomaja
- Wastewater Treatment Research Laboratory, Faculty of Applied and Computer Sciences, Department of Chemistry, Vaal University of Technology, Vanderbijlpark, 1911, South Africa
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Lawal IA, Lawal MM, Akpotu SO, Okoro HK, Klink M, Ndungu P. Noncovalent Graphene Oxide Functionalized with Ionic Liquid: Theoretical, Isotherm, Kinetics, and Regeneration Studies on the Adsorption of Pharmaceuticals. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b06634] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Isiaka A. Lawal
- Chemistry Department, Faculty of Applied and Computer Science, Vaal University of Technology, Vanderbijlpark Campus Boulevard, 1900 Vanderbijlpark, South Africa
| | - Monsurat M. Lawal
- School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, Durban 4001, South Africa
| | - Samson O. Akpotu
- Chemistry Department, Faculty of Applied and Computer Science, Vaal University of Technology, Vanderbijlpark Campus Boulevard, 1900 Vanderbijlpark, South Africa
| | - Hussein Kehinde Okoro
- Analytical-Environmental and Material Science Research Group, Department of Industrial Chemistry, Faculty of Physical Sciences, Faculty of Physical Sciences, P.M.B 1515, Ilorin 234000, Nigeria
| | - Michael Klink
- Chemistry Department, Faculty of Applied and Computer Science, Vaal University of Technology, Vanderbijlpark Campus Boulevard, 1900 Vanderbijlpark, South Africa
| | - Patrick Ndungu
- Energy, Sensors, and Multifunctional Nanomaterials Research Group, Department of Applied Chemistry, University of Johannesburg, Doornfontein, 2028 Johannesburg, South Africa
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Gusain R, Kumar N, Ray SS. Recent advances in carbon nanomaterial-based adsorbents for water purification. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2019.213111] [Citation(s) in RCA: 119] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Das M, Yadav M, Shukla F, Ansari S, Jadeja RN, Thakore S. Facile design of a dextran derived polyurethane hydrogel and metallopolymer: a sustainable approach for elimination of organic dyes and reduction of nitrophenols. NEW J CHEM 2020. [DOI: 10.1039/d0nj01871f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This work reports a sustainable approach for fabrication of a highly cost-effective and operation-convenient adsorbent derived from dextran and its valorization to a metallopolymer photocatalyst.
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Affiliation(s)
- Manita Das
- Department of Chemistry
- Faculty of Science
- The Maharaja Sayajirao University of Baroda
- Vadodara 390 002
- India
| | - Monika Yadav
- Department of Environmental Studies, Faculty of Science
- The Maharaja Sayajirao University of Baroda
- Vadodara 390 002
- India
| | - Falguni Shukla
- Department of Chemistry
- Faculty of Science
- The Maharaja Sayajirao University of Baroda
- Vadodara 390 002
- India
| | - Sagufa Ansari
- Department of Chemistry
- Faculty of Science
- The Maharaja Sayajirao University of Baroda
- Vadodara 390 002
- India
| | - R. N. Jadeja
- Department of Chemistry
- Faculty of Science
- The Maharaja Sayajirao University of Baroda
- Vadodara 390 002
- India
| | - Sonal Thakore
- Department of Chemistry
- Faculty of Science
- The Maharaja Sayajirao University of Baroda
- Vadodara 390 002
- India
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Madikizela LM, Ncube S, Chimuka L. Analysis, occurrence and removal of pharmaceuticals in African water resources: A current status. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 253:109741. [PMID: 31665691 DOI: 10.1016/j.jenvman.2019.109741] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 10/08/2019] [Accepted: 10/19/2019] [Indexed: 05/27/2023]
Abstract
Pharmaceuticals are organic compounds used in medicines for alleviation of pain. Since 2017, there has been a steady increase on the availability of information on contamination of water resources caused by pharmaceuticals in some African countries. Thus far, most environmental monitoring studies of pharmaceuticals are conducted in South Africa while there is still no available data in majority of the African countries. Therefore, the knowledge on the presence of pharmaceuticals in African water resources is still lacking. In an attempt to provide more information in this aspect, this review article seeks to critically evaluate the progress made thus far by the African scientists in the environmental monitoring and assessment of pharmaceuticals. The most studied groups of pharmaceuticals in Africa are non-steroidal anti-inflammatory drugs, antibiotics, antiretroviral drugs and steroid hormones. Various remediation studies for selected pharmaceuticals in Africa are documented in literature. In the present review, the challenges facing the African researchers or countries on providing more scientific data on the occurrence of pharmaceuticals in water are discussed. Furthermore, the gaps and recommendations for future work are given.
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Affiliation(s)
| | - Somandla Ncube
- Department of Chemistry, University of South Africa, Private Bag X6, Florida, 1710, South Africa
| | - Luke Chimuka
- Molecular Sciences Institute, School of Chemistry, University of Witwatersrand, Private Bag X3, Johannesburg, 2050, South Africa
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Petrucci R, Chiarotto I, Mattiello L, Passeri D, Rossi M, Zollo G, Feroci M. Graphene Oxide: A Smart (Starting) Material for Natural Methylxanthines Adsorption and Detection. Molecules 2019; 24:E4247. [PMID: 31766549 PMCID: PMC6930464 DOI: 10.3390/molecules24234247] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 11/12/2019] [Accepted: 11/18/2019] [Indexed: 12/12/2022] Open
Abstract
Natural methylxanthines, caffeine, theophylline and theobromine, are widespread biologically active alkaloids in human nutrition, found mainly in beverages (coffee, tea, cocoa, energy drinks, etc.). Their detection is thus of extreme importance, and many studies are devoted to this topic. During the last decade, graphene oxide (GO) and reduced graphene oxide (RGO) gained popularity as constituents of sensors (chemical, electrochemical and biosensors) for methylxanthines. The main advantages of GO and RGO with respect to graphene are the easiness and cheapness of synthesis, the notable higher solubility in polar solvents (water, among others), and the higher reactivity towards these targets (mainly due to - interactions); one of the main disadvantages is the lower electrical conductivity, especially when using them in electrochemical sensors. Nonetheless, their use in sensors is becoming more and more common, with the obtainment of very good results in terms of selectivity and sensitivity (up to 5.4 × 10-10 mol L-1 and 1.8 × 10-9 mol L-1 for caffeine and theophylline, respectively). Moreover, the ability of GO to protect DNA and RNA from enzymatic digestion renders it one of the best candidates for biosensors based on these nucleic acids. This is an up-to-date review of the use of GO and RGO in sensors.
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Affiliation(s)
- Rita Petrucci
- Dipartimento di Scienze di Base e Applicate per l’Ingegneria (SBAI), Sapienza University of Rome, via Antonio Scarpa, 14, 00161 Roma, Italy; (I.C.); (L.M.); (D.P.); (M.R.); (G.Z.)
| | | | | | | | | | | | - Marta Feroci
- Dipartimento di Scienze di Base e Applicate per l’Ingegneria (SBAI), Sapienza University of Rome, via Antonio Scarpa, 14, 00161 Roma, Italy; (I.C.); (L.M.); (D.P.); (M.R.); (G.Z.)
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Dhiman P, Dhiman N, Kumar A, Sharma G, Naushad M, Ghfar AA. Solar active nano-Zn1−xMgxFe2O4 as a magnetically separable sustainable photocatalyst for degradation of sulfadiazine antibiotic. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111574] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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