Metal oxide for heavy metal detection and removal

Alias, Nurhaswani; Rosli, Siti Azlina; Sazalli, Nurliyana Abu Hasan; Hamid, Haslinda Abdul; Arivalakan, Sarasijah; Umar, Siti Nur Hanisah; Beh, Khi Khim; Taib, Bibi Nadia; Keat, Yeoh Kar; Razak, Khairunisak Abdul; Yeoh, Fei-Yee; Hussain, Zuhailawati; Bakar, Elmi Abu; Kamaruddin, Noor Fazreena; Manaf, Asrulnizam Abd; Uchiyama, Naoki; Tan, Wei; Matsuda, Atsunori; Kawamura, Go; Sawada, Kazuaki; Matsumoto, Akihiko; Lockman, Zainovia

doi:10.1016/b978-0-12-817505-7.00015-4

Cited by 10 publications

(8 citation statements)

References 107 publications

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“…Heavy metal contaminations with herbal medicines beyond the safety level affect our health (77). Heavy metal is known for bioaccumulation in humans because of its nondegradable property (78). In the present study, there was no contamination of cadmium, bismuth and lead (Table 5) in any of the plants, which indicates that the prepared powders are safe to use in the formulation of drugs.…”

Section: Heavy Metal Testmentioning

confidence: 44%

Characterisation of indigenous plants for herbal formulations preparation based on pharmacognostic and physiochemical data

et al. 2022

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The use of plant-based drugs has increased considerably in the modern world for their efficiency in managing diseases with lesser side effects than synthetic drugs. The current study was aimed to confirm the identity, quality and purity of some locally available potential medicinal plants such as Alstonia scholaris (bark), Centella asiatica (whole plant), Drymaria cordata (whole plant), Hydrocotyle sibthorpioides (whole plant), Oroxylum indicum (bark), Senna hirsuta (leaf), Senna occidentalis (leaf), Solanum indicum (root), Stephania japonica (tuber) in powdered form. The powdered plant parts were evaluated for preliminary phytochemicals, pharmacognostical studies, physical characteristics and heavy metals. Preliminary phytochemical screening of the different extracts inferred the existence of carbohydrates, phenolics, alkaloids and amino acids while triterpenoids were absent. Microscopical study of the powder revealed the diagnostic qualities such as stone cells, trichomes, stomata, calcium oxalate crystal, fibres, xylem vessel, pitted spiral vessels, etc. The colour, odour, flavour/taste and texture of the pulverized plant were overall acceptable. The physical characteristics which determine the flow rate of the powder with respect to Carr’s index and Hausner’s ratio were found to be good to passable except for Hydrocotyle sibthorpioides (whole plant), Oroxylum indicum (bark), which were not easily passable. The heavy metal test showed the absence of bismuth, cadmium and lead. Thus the present study may serve as a standard reference for the quality control analysis of the herbal drug either singly or in synergy.

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Section: Heavy Metal Testmentioning

confidence: 44%

Characterisation of indigenous plants for herbal formulations preparation based on pharmacognostic and physiochemical data

et al. 2022

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“…In wastewater treatment, the removal of heavy metals from a water source is crucial, owing to the serious health hazards and long-lasting complications that these contaminants pose to humans [ 109 ]. The sol–gel method has been used for novel material fabrication for heavy metal removal and adsorption, such as sol–gel derived, electro-spined flexible Fe 3 O 4 fibers [ 110 ], mesoporous TiO 2 with sodium-modified surfaces [ 111 ], sol–gel ultrafine alumina fibers [ 15 ] and yttria-stabilized ZrO 2 membranes [ 112 ].…”

Section: Future Outlook For the Sol–gel Methods In Emerging Technolmentioning

confidence: 99%

Nanomaterial Fabrication through the Modification of Sol–Gel Derived Coatings

et al. 2021

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In materials processing, the sol–gel method is one of the techniques that has enabled large-scale production at low cost in the past few decades. The versatility of the method has been proven as the fabrication of various materials ranging from metallic, inorganic, organic, and hybrid has been reported. In this review, a brief introduction of the sol–gel technique is provided and followed by a discussion of the significance of this method for materials processing and development leading to the creation of novel materials through sol–gel derived coatings. The controlled modification of sol–gel derived coatings and their respective applications are also described. Finally, current development and the outlook of the sol–gel method for the design and fabrication of nanomaterials in various fields are described. The emphasis is on the significant potential of the sol–gel method for the development of new, emerging technologies.

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“…Several other high-performance liquid chromatography (HPLC) techniques coupled with UV-visible detectors, gas chromatography, ion chromatography, isotope dilution, and hydride generation AAS are other standard methods used to determine trace elements [15][16][17][18][19][20]. Nanostructures like thin films, nanopowders, nanorods or nanowires can be incorporated into sensors in all these sensing techniques [21]. Recently, many integrated detection techniques have been introduced as per the requirement and feasibility of detecting specific elements [22,23].…”

Section: Heavy Metal Detection Techniquesmentioning

confidence: 99%

“…This technique is more suitable than other membrane processes due to its high rejection ability, stable separation selectivity, low energy consumption, low fouling rate, and the ability for pure water permeation and specific water flux. However, there are also some challenges for the exposure of this technique like high energy consumption for the regeneration process, reverse solute leakage, and ineffective membranes 21. The selection of membranes is also a significant step to make the forward osmosis (FO) process more effective since fouling can be controlled by the pretreatment of membranes, choosing non‐fouling materials for preparing membranes, and proper cleaning 129.…”

Section: Heavy Metal Removal Techniquesmentioning

confidence: 99%

Recent Advances in Detection and Removal of Heavy Metals from Contaminated Water

et al. 2022

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The water treatment process by removing heavy metals from polluted sources is explained in detail. Various detection and removal techniques and their modeling for heavy metal removal are reviewed. Detection of heavy metals is possible by several optical, spectroscopic and electrochemical methods. Due to their high efficiencies and accurate evaluation capabilities, several spectroscopic as well as other techniques like neutron activation analysis and X‐ray fluorescence are discussed and found highly significant. Adsorption, photocatalysis, ion exchange, electrochemical methods, membrane filtration, chemical precipitation, and forward osmosis are the most frequently used techniques for heavy metal removal, being up to 100 % efficient to detect and remove heavy metal ions. The design, operation, and key features of all techniques are explained. The regeneration of used adsorbents, resins, and other materials to remove heavy metals is found as key step in the wastewater treatment process.

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Metal oxide for heavy metal detection and removal

Cited by 10 publications

References 107 publications

Characterisation of indigenous plants for herbal formulations preparation based on pharmacognostic and physiochemical data

Characterisation of indigenous plants for herbal formulations preparation based on pharmacognostic and physiochemical data

Nanomaterial Fabrication through the Modification of Sol–Gel Derived Coatings

Recent Advances in Detection and Removal of Heavy Metals from Contaminated Water

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