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Inyinbor AA, Bankole DT, Oluyori AP. Blighia sapida Waste Biochar in Batch and Fixed-Bed Adsorption of Chloroquine Phosphate: Efficacy Validation Using Artificial Neural Networks. ACS OMEGA 2024; 9:12564-12574. [PMID: 38524418 PMCID: PMC10955583 DOI: 10.1021/acsomega.3c05008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 11/29/2023] [Accepted: 12/13/2023] [Indexed: 03/26/2024]
Abstract
The present study investigated the potency of biochar prepared from Blighia sapida seedpods (BSSPs) in the uptake of chloroquine phosphate (CQP) from single-component batch and multicomponent fixed-bed adsorption systems. BSSPs presented a highly porous structure with a BET surface area of 1122.05 m2/g, to which adsorption efficiency correlated. The Dubinin-Radushkevich isotherm energy was obtained as 129.09 kJ/mol, confirming the chemisorption nature of the BSSP-CQP adsorption system. The efficiency of the artificial neural network (ANN) was evaluated using the lowest mean square error (MSE = 7.27) and highest correlation coefficient (R2 = 0.9910). A good agreement between the experimental results and the ANN-predicted data indicated the efficiency of the model. The percentage removal of 95.78% obtained for the column adsorption studies indicated the effectiveness of BSSPs in a multicomponent system. The mechanism of the interaction proceeded via hydrogen bonding and electrostatic attraction. This was confirmed by the high desorption efficiency (69.11%) with a HCl eluent. The degree of reversibility was found to be 2.95, indicating the reusability potential of BSSPs. BSSPs are therefore considered multilayered adsorbents with potential applications in pharmaceutical wastewater treatment.
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Affiliation(s)
- Adejumoke Abosede Inyinbor
- Department
of Physical Sciences, Landmark University, P.M.B 1001, Omu Aran 251101, Nigeria
- Clean
water and Sanitation Sustainable Development Goal, Landmark University, P.M.B 1001, Omu Aran 251101, Nigeria
| | - Deborah Temitope Bankole
- Department
of Physical Sciences, Landmark University, P.M.B 1001, Omu Aran 251101, Nigeria
- Clean
water and Sanitation Sustainable Development Goal, Landmark University, P.M.B 1001, Omu Aran 251101, Nigeria
| | - Abimbola Peter Oluyori
- Department
of Physical Sciences, Landmark University, P.M.B 1001, Omu Aran 251101, Nigeria
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2
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Bayode A, Folorunso MT, Helmreich B, Omorogie MO. Biomass-Tuned Reduced Graphene Oxide@Zn/Cu: Benign Materials for the Cleanup of Selected Nonsteroidal Anti-inflammatory Drugs in Water. ACS OMEGA 2023; 8:7956-7967. [PMID: 36872960 PMCID: PMC9979318 DOI: 10.1021/acsomega.2c07769] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 01/27/2023] [Indexed: 06/18/2023]
Abstract
The persistent increase in the amount of nonsteroidal anti-inflammatory drugs such as ibuprofen (IBP) and diclofenac (DCF) in water bodies is alarming, thereby calling for a need to be addressed. To address this challenge, a bimetallic (copper and zinc) plantain-based adsorbent (CZPP) and reduced graphene oxide modified form (CZPPrgo) was prepared by facile synthesis for the removal of ibuprofen (IBP) and diclofenac (DCF) in water. Both the CZPP and CZPPrgo were characterized by different techniques such as Fourier transform infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), and pHpzc analysis. FTIR and XRD confirmed the successful synthesis of the CZPP and CZPPrgo. The adsorption of the contaminants was carried out in a batch system, and several operational variables were optimized. The adsorption is affected by the initial concentration of the pollutants (5-30 mg·L-1), the adsorbent dose (0.05-0.20 g), and pH (2.0-12.0). The CZPPrgo has the best performance with maximum adsorption capacities of 148 and 146 mg·g-1 for removing IBP and DCF from water, respectively. The experimental data were fitted into different kinetic and isotherm models; the removal of IBP and DCF follows the pseudo-second order, which can be best explained by the Freundlich isotherm model. The reuse efficiency was above 80% even after four adsorption cycles. This shows that the CZPPrgo is a promising adsorbent for removing IBP and DCF in water.
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Affiliation(s)
- Ajibola
A. Bayode
- Department
of Chemical Sciences, Faculty of Natural Sciences, Redeemer’s University, P.M.B. 230, 232101 Ede, Nigeria
- Laboratório
de Química Analítica Ambiental e Ecotoxicologia (LaQuAAE),
Departamento de Química e Física Molecular, Instituto
de Química de Sao Carlos, Universidade
de Sao Paulo, Avenida
Trabalhador Sãocarlense 400, 13566-590 São Carlos, SP, Brazil
- Innovative
Materials and Processes for Advanced Environmental Clean Technologies
(IMPACT) Research Group Laboratory, Department of Chemical Sciences, University of Padova, 35122 Padua, Italy
| | - Mercy T. Folorunso
- Department
of Chemical Sciences, Faculty of Natural Sciences, Redeemer’s University, P.M.B. 230, 232101 Ede, Nigeria
| | - Brigitte Helmreich
- Chair
of Urban Water Systems Engineering, Technical
University of Munich (TUM), Am Coulombwall 3, 85748 Garching, Germany
| | - Martins O. Omorogie
- Department
of Chemical Sciences, Faculty of Natural Sciences, Redeemer’s University, P.M.B. 230, 232101 Ede, Nigeria
- Chair
of Urban Water Systems Engineering, Technical
University of Munich (TUM), Am Coulombwall 3, 85748 Garching, Germany
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3
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Hacıosmanoğlu GG, Mejías C, Martín J, Santos JL, Aparicio I, Alonso E. Antibiotic adsorption by natural and modified clay minerals as designer adsorbents for wastewater treatment: A comprehensive review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 317:115397. [PMID: 35660825 DOI: 10.1016/j.jenvman.2022.115397] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 05/01/2022] [Accepted: 05/23/2022] [Indexed: 05/16/2023]
Abstract
Increased antibiotic use worldwide has become a major concern because of their health and environmental impacts. Since most antibiotic residues can hardly be removed from wastewater using conventional treatments, alternative methods receive great attention. Adsorption is one of the most efficient and cost-effective treatment methods for antibiotics. Among the adsorbents, clay minerals have garnered increasing attention due to their unique properties including availability, high specific surface area, low cost, cation exchange capacity, and good removal efficiency. This paper reviews the recent progress made in the use of natural and modified clay minerals for the removal of antibiotics from water. First, the sources, occurrence, removal and health effects of the antibiotics commonly encountered in water bodies are described. Antibiotic concentration levels and average removal efficiencies measured in conventional activated sludge treatment systems worldwide are also provided to better address the problem. Second, the review explores the characteristics of clay minerals as adsorbent of antibiotics and the factors affecting the adsorption. The review identifies and discusses the future trends and strategies used to increase the adsorption capacity of clay minerals by modification and combination techniques (intercalation of novel functional groups such as organocations, biopolymers and metal pillared-clay minerals, combination with biochar or thermal activation). The quantitative comparisons of clay minerals' ability for antibiotic removal are given. Some natural clay minerals have good removal potential for antibiotics, with maximum adsorption capacities over 100 mg/g. For most other adsorbents, surface modifications and combination techniques resulted in improved adsorption properties (including higher surface area, enhanced adsorption capacity, increased stability and mechanical strength). Finally, the application of these adsorbents at pilot scale, using real wastewater samples, their reuse, economic analysis and life cycle assessment are other issues that have been considered.
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Affiliation(s)
- Gül Gülenay Hacıosmanoğlu
- Environmental Engineering Department, Faculty of Engineering, Marmara University, Uyanık Cd. No:6, 34840, Istanbul, Turkey.
| | - Carmen Mejías
- Departamento de Química Analítica, Escuela Politécnica Superior, Universidad de Sevilla, C/Virgen de África, 7, E-41011, Seville, Spain
| | - Julia Martín
- Departamento de Química Analítica, Escuela Politécnica Superior, Universidad de Sevilla, C/Virgen de África, 7, E-41011, Seville, Spain
| | - Juan Luis Santos
- Departamento de Química Analítica, Escuela Politécnica Superior, Universidad de Sevilla, C/Virgen de África, 7, E-41011, Seville, Spain
| | - Irene Aparicio
- Departamento de Química Analítica, Escuela Politécnica Superior, Universidad de Sevilla, C/Virgen de África, 7, E-41011, Seville, Spain
| | - Esteban Alonso
- Departamento de Química Analítica, Escuela Politécnica Superior, Universidad de Sevilla, C/Virgen de África, 7, E-41011, Seville, Spain
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4
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Roy S, Ahmaruzzaman M. Ionic liquid based composites: A versatile materials for remediation of aqueous environmental contaminants. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 315:115089. [PMID: 35525038 DOI: 10.1016/j.jenvman.2022.115089] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 04/01/2022] [Accepted: 04/14/2022] [Indexed: 06/14/2023]
Abstract
Water pollution is one of the most aggravated problems threatening the sustainability of human race and other life forms due to the rapid pace of civilization and industrialization. A long history exists of release of hazardous pollutants into the water bodies due to selfish human activities since the Industrial Revolution, but no effort has been completely successful in curbing the activities that result in the degradation of our environment. These pollutants are harmful, carcinogenic and have adverse health effects to all forms of life. Thus, remarkable efforts have been geared up to obtain clean water by exploiting science and technology. The application of Ionic liquids (ILs) as sustainable materials have received widespread attention since the last decade. Their interesting properties, simplicity in operation and satisfactory binding capacities in elimination of the contaminants makes them a valuable prospect to be utilized in wastewater treatment. Immobilizing and grafting the solid supports with ILs have fetched efficient results to exploit their potential in the adsorptive removal processes. This review provides an understanding of the recent developments and outlines the possible utility of IL based nano adsorbents in the removal of organic compounds, dyes and heavy metal ions from aqueous medium. Effect of several parameters such as sorbent dosage, pH and temperature on the removal efficiency has also been discussed. Moreover, the adsorption isotherms, thermodynamics and mechanism are comprehensively studied. It is envisioned that the literature gathered in this article will guide the budding scientists to put their interest in this area of research in the days to come.
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Affiliation(s)
- Saptarshi Roy
- Department of Chemistry, National Institute of Technology, Silchar, 788010, Assam, India
| | - Md Ahmaruzzaman
- Department of Chemistry, National Institute of Technology, Silchar, 788010, Assam, India.
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5
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Batch and Column Adsorption of Phosphorus by Modified Montmorillonite. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12115703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Phosphorus pollutants are a crucial component of water eutrophication. In this study, montmorillonite modified by Keggin Al13 and hexadecyltrimethyl ammonium (Al13-O-MMt) was used as an adsorbent to remove phosphorus from solutions and thus simulate the practice of a field trial, such as in wastewater. The ammonium molybdate spectrophotometric method was used to determine the concentrations of phosphorus in samples. In the batch experiment, phosphorus was adsorbed by original montmorillonite (MMt) and Al13-O-MMt at various pH values (6–9) to identify the effect of pH during the adsorption process. The batch adsorption results demonstrate that Al13-O-MMt can adsorb up to 93% of phosphorus at pH = 8. Six graduated amounts (0.01–0.25 g) of montmorillonite were tested at three different temperatures to determine the most suitable temperature and the minimum dosage of Al13-O-MMt needed for the adsorption of 200 mg/L phosphorus in a 30 mL solution, which was 0.1 g at 25 °C. Therefore, the adsorption capacity of Al13-O-MMt was found to be 60 mg/g. Subsequently, a column experiment was conducted. The results showed that the optimized dosage of Al13-O-MMt was 6.667 g for phosphorus adsorption with a concentration of 200 mg/L in 2000 mL solution, and the breakthrough time was 4794.67 min.
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6
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Li J, Xu W, Wang X, Wu F, Wang L, Feng J, Wang Z, Zhang H. Ionic liquid-based dispersive liquid–liquid microextraction followed by dispersive solid phase extraction coupled with HPLC-DAD for the determination of sulfonylurea herbicides in soymilk samples. J LIQ CHROMATOGR R T 2021. [DOI: 10.1080/10826076.2022.2058960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Jilong Li
- College of Chemistry and Life Science, Changchun University of Technology, Changchun, China
| | - Weili Xu
- College of Chemistry and Life Science, Changchun University of Technology, Changchun, China
| | - Xiujuan Wang
- College of Chemistry and Life Science, Changchun University of Technology, Changchun, China
| | - Fengze Wu
- College of Chemistry and Life Science, Changchun University of Technology, Changchun, China
| | - Lin Wang
- College of Chemistry and Life Science, Changchun University of Technology, Changchun, China
| | - Ji Feng
- College of Chemistry and Life Science, Changchun University of Technology, Changchun, China
| | - Zhibing Wang
- College of Chemistry and Life Science, Changchun University of Technology, Changchun, China
- College of Chemistry, Jilin University, Changchun, China
| | - Hanqi Zhang
- College of Chemistry, Jilin University, Changchun, China
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7
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Liu M, Zhao Z, Yu W. Comparative investigation on removal characteristics of tetracycline from water by modified wood membranes with different channel walls. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 775:145617. [PMID: 33618306 DOI: 10.1016/j.scitotenv.2021.145617] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/24/2021] [Accepted: 01/30/2021] [Indexed: 06/12/2023]
Abstract
The alkali-innocuous citric acid (CA) modified wood membranes (WMs) have been developed as facile, economical, and effective adsorption membranes to remove tetracycline (TC) from water. However, TC removal by modified WMs with different types of wood channel walls have rarely been compared. Therefore, in this study, modified WMs were prepared with pinewood (PW) and basswood (BW). The PW and BW WMs before and after modification were characterized by SEM, EDX, XRD, ATR-FTIR, TGA, contact angle and zeta potential. After modification, cellulose I in cellulose crystal structures of raw WM transformed to cellulose II and the contents of carboxylic groups for PW and BW were enhanced to make the hydrophilicity of WM surface increased. Compared with modified PW WMs, particles formed on the channel walls of modified BW WMs containing vessel pits to make more carboxylic groups introduced. The TC adsorption breakthrough curves showed that the 6 wt% alkali- CA modified BW had an effective filtration volume of 1968 bed volume (BV) compared with the 4 wt% alkali-CA modified PW of 1205 BV as the influent TC and breakthrough point were chosen at 2 and 0.5 mg/L, respectively. At low pH, TC complex with WM surfaces through Lewis acid-base interaction. Zwitterionic TC was shown to favor adsorption onto WM via hydrogen bonding at pH of around 5. With further increasing pH, TC adsorption efficiency decreased due to the electrostatic repulsion. The costs of modified BW and PW are about 0.0054-0.0126 US$/m3 and 0.01-0.024 US$/m3 for a low TC concentration effluent (0-0.5 mg/L), respectively. This work shed a new sight on how to develop economical and effective adsorption WMs for contaminants removal from water.
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Affiliation(s)
- Minmin Liu
- Key Laboratory of Drinking Water Science and Technology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Zhiying Zhao
- Key Laboratory of Drinking Water Science and Technology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of forestry, Northeast Forestry University, Harbin 150040, China
| | - Wenzheng Yu
- Key Laboratory of Drinking Water Science and Technology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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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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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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11
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Lawal IA, Klink M, Ndungu P. Deep eutectic solvent as an efficient modifier of low-cost adsorbent for the removal of pharmaceuticals and dye. ENVIRONMENTAL RESEARCH 2019; 179:108837. [PMID: 31678732 DOI: 10.1016/j.envres.2019.108837] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 10/09/2019] [Accepted: 10/17/2019] [Indexed: 06/10/2023]
Abstract
Waste from biomass was used to prepare a low-cost biochar-clay hybrid adsorbent. The hybrid adsorbent was synthesised by combining Kaolin with biomass (Vitex doniana), thereafter, modified with Deep Eutectic Solvent (DES). The materials were characterised using scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectrometry (FTIR), Thermal gravimetric analysis (TGA), and Brunauer-Emmett-Teller (BET), also, pHpzc of the materials were studied. The resultant adsorbents were used for both column and batch adsorption of organic pollutants; dye (Acid Blue 74; AB74) and pharmaceuticals (ciprofloxacin; CIP and acetaminophen; ACTE). Column adsorption capacity, effect of pollutant concentration and effect of flow rate were studied, also, the column was modelled using Thomas, Yoon-Nelson and Adams-Bohart model. Furthermore, batch adsorption experiments were performed, effect of change in pH, time, dose and concentration were studied. Batch adsorption data were fitted with isotherm and kinetic models. The experiment showed tremendous increase in adsorption capacity when the hybrid adsorbent (HYD) was modified with DES (HYD-DES). Acid Blue 74 on HYD-DES has the highest column sorption capacity followed by ciprofloxacin and acetaminophen. Adsorption was favoured at pH range of 2-10 for both AB74 and ACTE as there is no significant changes in the % removal performance, while adsorption was best at pH 6 and above for CIP. AB74 and CIP are best described by Langmuir isotherm, whereas ACTE adsorption was best explained by Freundlich isotherm equilibrium. The DES modified HYD has shown it can be effectively utilised as possible adsorbent for adsorbing organic dyes and pharmaceuticals.
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Affiliation(s)
- Isiaka A Lawal
- Chemistry Department, Faculty of Applied and Computer Science, Vaal University of Technology, Vanderbijlpark Campus, Boulevard, 1900, Vanderbijlpark, South Africa.
| | - 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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12
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Jaria G, Calisto V, Silva CP, Gil MV, Otero M, Esteves VI. Fixed-bed performance of a waste-derived granular activated carbon for the removal of micropollutants from municipal wastewater. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 683:699-708. [PMID: 31150890 DOI: 10.1016/j.scitotenv.2019.05.198] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 05/14/2019] [Accepted: 05/14/2019] [Indexed: 06/09/2023]
Abstract
This work aimed to assess the fixed-bed adsorptive performance of a primary paper mill sludge-based granular activated carbon (PSA-PA) for the removal of pharmaceuticals, namely carbamazepine (CBZ), sulfamethoxazole (SMX) and paroxetine (PAR), from water. The breakthrough curves corresponding to the adsorption of CBZ at different flow rates and in two different matrices (distilled and municipal wastewater) were firstly determined, which allowed to select the most favorable flow rate for the subsequent experiments. The fixed-bed adsorption of CBZ, SMX and PAR from single and ternary solutions in wastewater showed that the performance of PSA-PA was different for each pharmaceutical. According to the obtained breakthrough curves, the poorest bed adsorption capacity, either from single or ternary solution, was observed for SMX, which may be related with electrostatic repulsion at the pH of the wastewater used (pH ~ 7.3-7.7). Also, the bed adsorption capacity of PSA-PA for SMX, in the ternary solution, was notoriously lower compared to the single solution, while it slightly decreased for CBZ and even increased for PAR. The regeneration studies showed that the CBZ adsorption capacity of the PSA-PA bed decreased about 38 and 71% after the first and the second thermal regeneration stages, respectively. This decline was comparatively larger than the corresponding reduction of the PSA-PA specific surface area (SBET), which decreased only 5 and 25% for the first and second regeneration stages, respectively, and pointed to the lack of viability of more than one regeneration stage.
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Affiliation(s)
- Guilaine Jaria
- Department of Chemistry, CESAM, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Vânia Calisto
- Department of Chemistry, CESAM, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal.
| | - Carla Patrícia Silva
- Department of Chemistry, CESAM, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - María Victoria Gil
- Instituto Nacional del Carbón, INCAR-CSIC, Calle Francisco Pintado Fe 26, 33011 Oviedo, Spain
| | - Marta Otero
- Department of Environment and Planning, CESAM, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Valdemar I Esteves
- Department of Chemistry, CESAM, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
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Lawal IA, Klink M, Ndungu P, Moodley B. Brief bibliometric analysis of "ionic liquid" applications and its review as a substitute for common adsorbent modifier for the adsorption of organic pollutants. ENVIRONMENTAL RESEARCH 2019; 175:34-51. [PMID: 31102948 DOI: 10.1016/j.envres.2019.05.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 04/12/2019] [Accepted: 05/06/2019] [Indexed: 05/21/2023]
Abstract
The importance of improving adsorbent's adsorption efficiency in organic pollutants has been reported by many researchers. Surfactant-based modified adsorbents were a tasteful choice. As a result, the use of surfactants as a modifier for removing organic pollutants has shown to play a very big role in enhancing the adsorption efficiency of different materials. Ionic liquids are receiving extensive interest as green multipurpose compounds, primarily as a replacement for traditional chemicals that are used in many chemical processes. This work gives a brief bibliometric analysis of application of ionic liquid from 1930 to 2017, documents were collected from Scopus database and keywords from the abstracts and titles were analyzed using VOSviewer software. Furthermore, the work presents a review of conventionally known surfactants and the recent likelihood of ionic liquids for modifying adsorbents for adsorption of organic pollutants. Over the period of years between 1930 and 2017, 13,144 documents were published on the application of ionic liquids. VOSviewer software further confirms that adsorption is one of the leading areas in applications of ionic liquids. Review also showed that ionic liquid is a good modifier of adsorbents.
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Affiliation(s)
- Isiaka A Lawal
- Energy, Sensors and Multifunctional Nanomaterials Research Group, Department of Applied Chemistry, University of Johannesburg, Doornfontein 2028, Johannesburg, South Africa; Chemistry Department Faculty of Applied and Computer Science, Vaal University of Technology, Vanderbijlpark Campus, Boulevard, 1900, Vanderbijlpark, South Africa.
| | - 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.
| | - Brenda Moodley
- School of Chemistry and Physics, College of Agriculture, Engineering and Science, University of KwaZulu-Natal, P/Bag X45001, Westville Campus, Durban, 4000, South Africa
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Lawal IA, Lawal MM, Akpotu SO, Azeez MA, Ndungu P, Moodley B. Theoretical and experimental adsorption studies of sulfamethoxazole and ketoprofen on synthesized ionic liquids modified CNTs. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 161:542-552. [PMID: 29929130 DOI: 10.1016/j.ecoenv.2018.06.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2018] [Revised: 06/05/2018] [Accepted: 06/09/2018] [Indexed: 06/08/2023]
Abstract
The adsorption of sulfamethoxazole (SMZ) and ketoprofen (KET) using carbon nanotubes (CNTs) and CNTs modified with ionic liquids (ILs) was investigated. Two ionic liquids (1-benzyl, 3-hexyl imidazolium, IL1 and 1-benzyl, 3-decahexyl imidazolium, IL2) were synthesized, and characterized by nuclear magnetic resonance (1H and 13C NMR) and high resolution-mass spectrometry (HR-MS). CNTs and modified CNTs were characterized using FT-IR, X-ray diffraction (XRD), surface area and porosity analysis, thermal gravimetric analysis (TGA), Zeta potential, Raman and scanning electron microscopy (SEM). Kinetics, isotherm and computational studies were carried out to determine the efficiency and adsorption mechanism of SMZ and KET on modified CNTs. A density functional theory (DFT) method was applied to shed more light on the interactions between the pharmaceutical compounds and the adsorbents at the molecular level. The effects of adsorbent dosage, concentration, solution pH, energetics and contact time of SMZ and KET on the adsorption process were investigated. The adsorption of SMZ and KET on CNTs and modified CNTs were pH dependent, and adsorption was best described by pseudo-second-order kinetics and the Freundlich adsorption isotherm. Ionic liquid modified CNTs showed improved adsorption capacities compared to the unmodified ones for both SMZ and KET, which is in line with the computational results showing performance order; CNT+KET/SMZ < CNT-ILs+SMZ < CNT-ILs+KET.
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Affiliation(s)
- Isiaka A Lawal
- Energy, Sensors and Multifunctional Nanomaterials Research Group, Department of Applied chemistry, University of Johannesburg, P.O. Box 17011, Doornfontein, 2028 Johannesburg, South Africa; School of Chemistry and Physics, College of Agriculture, Engineering and Science, University of KwaZulu-Natal, P/Bag X45001, Westville Campus, Durban 4000, South Africa.
| | - Monsurat M Lawal
- Catalysis and Peptide Research Unit, School of Health Sciences, University of KwaZulu-Natal, Durban 4041, South Africa
| | - Samson O Akpotu
- Energy, Sensors and Multifunctional Nanomaterials Research Group, Department of Applied chemistry, University of Johannesburg, P.O. Box 17011, Doornfontein, 2028 Johannesburg, South Africa
| | - Mayowa A Azeez
- Department of Chemistry, Ekiti State University, P.M.B 5363 Ado Ekiti, Nigeria
| | - Patrick Ndungu
- Energy, Sensors and Multifunctional Nanomaterials Research Group, Department of Applied chemistry, University of Johannesburg, P.O. Box 17011, Doornfontein, 2028 Johannesburg, South Africa
| | - Brenda Moodley
- School of Chemistry and Physics, College of Agriculture, Engineering and Science, University of KwaZulu-Natal, P/Bag X45001, Westville Campus, Durban 4000, South Africa.
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