Carbon Nanotubes in the 21st Century: An Advancement in Real Time Monitoring and Control of Environmental Water

Pandey, Sadanand; Goswami, Gopal Krishna; Okoro, Hussein K.; Fosso‐Kankeu, Elvis

doi:10.1002/9781119577119.ch8

Cited by 7 publications

(3 citation statements)

References 144 publications

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“…Chemicals that are environmentally persistent and have a tendency to bioaccumulate pose a great potential for environmental risk, especially when such chemicals come into contact with drinking water supplies and the food chain [15][16][17]. Various scholars have reported the effects of these substances and their potential for harm, including the development of AMR [4,5,7,18], as well as effects on the sex of aquatic organisms [19][20][21][22][23][24][25].…”

Section: Environmental Effects Of Active Chemicalsmentioning

confidence: 99%

A Review on Contaminants of Emerging Concern in the Environment: A Focus on Active Chemicals in Sub-Saharan Africa

et al. 2021

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Active chemicals are among the contaminants of emerging concern that are rarely covered in regulatory documents in sub-Saharan Africa. These substances are neither in the list of routinely monitored substances nor in the guidelines for routine environmental monitoring activities. This has been of concern to public health officials, toxicologists, communities, and governments, hence the need for risk assessment and regulation of these substances. In this review article, the presence of active chemicals in the sub-Saharan African environment was investigated. The results indicate the availability of few studies in some countries, while in other countries no reports of active chemicals were found, hence the need for further research targeting such countries. It was further observed that mixtures of active chemicals from different therapeutic categories—such as antibiotics and analgesics—were reported. The natural environment is increasingly at risk due to the presence of these substances, their metabolites, and their transformation byproducts. These substances are characterized by persistence as a result of their non-biodegradable nature; hence, they circulate from one environmental compartment to another through the food chain, causing harm along the way. Most studies that evaluated the toxicity of these substances considered the effects of a single drug, but observations indicated the presence of drug mixtures, hence the need for further evaluation of the effects of drug–drug interactions—including synergistic and additive effects—for environmental sustainability. The presence of ACs in several environmental compartments at quantifiable quantities was discovered in this investigation, indicating the potential for ecosystem injury as a result of bioaccumulation, bioconcentration, and biomagnification through the food chain. This necessitates further research on the subject in order to ensure a healthier environment.

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Section: Environmental Effects Of Active Chemicalsmentioning

confidence: 99%

A Review on Contaminants of Emerging Concern in the Environment: A Focus on Active Chemicals in Sub-Saharan Africa

et al. 2021

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“…Traditional physical techniques (adsorption on activated carbon, coagulation by chemical agents, ion exchange on synthetic adsorbent resins, etc.) can generally be used efficiently to remove dyes [21,22]. Advanced oxidation processes have been described as efficient procedures for obtaining high oxidation yields from several organic compounds such as photocatalysts [23,24].…”

Section: Introductionmentioning

confidence: 99%

Constructing Er-Doped ZnO/CuS/Au Core-Shell Nanowires with Enhanced Photocatalytic and SERS Properties

et al. 2021

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In this study, we fabricated Er-doped ZnO/CuS/Au core-shell nanowires using two-step wet chemical methods and an ion-sputtering method on a glass substrate as a bifunctional photocatalytic and surface-enhanced Raman scattering (SERS) substrate. The characteristic properties of as-prepared photocatalysts were confirmed by scanning electron microscopy, X-ray diffraction, transmission electron microscopy, energy-dispersive X-ray spectroscopy, DR/UV-Vis spectroscopy, and photoluminescence spectroscopy. Compared with Er-doped ZnO nanowires and Er-doped ZnO/CuS core-shell nanowires, Er-doped ZnO/CuS/Au core-shell nanowires exhibited remarkably photocatalytic activity to degrade acid orange 7 solutions under blue LED light. These results ascribed to the Er-doped ZnO/CuS/Au core-shell nanowires can enhance the visible-light absorbance and the separation efficiency of photogenerated electron-hole pairs, inducing their higher photocatalytic activity under blue LED light. In addition, Er-doped ZnO/CuS/Au core-shell nanowires exhibit high sensitivity, a low detection limit (10−6 M), uniformity, recyclability, and stability of SERS performance for detected acid orange 7.

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“…Nanomaterials have been employed for their high specific surface area and the large fraction of atoms available for chemical interaction [12]. Carbon nanotubes (CNTs) as an adsorption media have a high potential for removing toxic pollutants such as heavy metals (chromium, lead, zinc, and arsenic compounds), organic substances such as polycyclic aromatics (PAHs) and atrazine, and a wide range of biological contaminants (bacteria and viruses), natural organic matters (NOM), and cyanobacterial toxins from aqueous solutions [13][14][15][16][17]. One of the adsorbents suitable for the removal of ammonia is CNT.…”

Section: Introductionmentioning

confidence: 99%

Optimization and Modeling of Ammonia Removal from Aqueous Solutions by Using Adsorption on Single-walled Carbon Nanotubes

Hassani

Jamshidi

Rezaei

et al. 2021

J. Eng. Technol. Sci.

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Due to the health effects of ammonia as an environmental pollutant, such as its odor, corrosion, algae phenomenon, etc., a method should be adopted to remove it from wastewater. In this study, removal of ammonia from hypothetical wastewater was investigated using adsorption on SWCNTs. The Design-Expert software was used to design the experiments and optimize the parameters that are effective in the adsorption performance of carbon nanotubes (CNTs), such as contact time, adsorbent dosage, pH, temperature, and ammonia concentration. The results revealed that the maximum adsorption with a performance of 90% was attained at a pH of 9.5. In addition, the adsorption performance was enhanced by increasing adsorption time and adsorbent dosage. Furthermore, increasing the temperature and the adsorbate quantity led to a decrease in the adsorption performance.

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Carbon Nanotubes in the 21st Century: An Advancement in Real Time Monitoring and Control of Environmental Water

Cited by 7 publications

References 144 publications

A Review on Contaminants of Emerging Concern in the Environment: A Focus on Active Chemicals in Sub-Saharan Africa

A Review on Contaminants of Emerging Concern in the Environment: A Focus on Active Chemicals in Sub-Saharan Africa

Constructing Er-Doped ZnO/CuS/Au Core-Shell Nanowires with Enhanced Photocatalytic and SERS Properties

Optimization and Modeling of Ammonia Removal from Aqueous Solutions by Using Adsorption on Single-walled Carbon Nanotubes

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