Alkyl Thiourea Functionalised Silica for the Effective Removal of Heavy Metals from Acanthopanax senticosus Extract

Acanthopanax senticosus extract with excessive standard of Pb, Cd, Hg, and Cu was used as the research object, and the alkyl thiourea functionalised silica was used as a new heavy metal removal scavenger. The heavy metal removal process was optimised by orthogonal experiment with dynamic and static...

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Bibliographic Details
Published in:BioMed research international 2020, Vol.2020 (2020), p.1-10
Main Authors: Meng, Xiao-xia, Zhang, Min, North, Christopher, Zhang, Shuo, Guo, Hong-Li, Gao, Xiu-Li
Format: Article
Language:English
Subjects:
Acanthopanax
Activated carbon
Adaptability
Adsorption
Cadmium
Chinese medicine
Composition effects
Copper
Drug dosages
Eleutherococcus - chemistry
Fingerprints
Heavy metals
Herbal medicine
High-performance liquid chromatography
Lead
Liquid chromatography
Medicine, Chinese
Mercury
Mercury (metal)
Metals
Metals, Heavy - chemistry
Methods
Plant Extracts - pharmacology
Product safety
Quality control
Quality management
Silica
Silicon dioxide
Silicon Dioxide - chemistry
Similarity
Temperature
Thiourea
Thiourea - chemistry
Thioureas
Traditional Chinese medicine
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Summary:Acanthopanax senticosus extract with excessive standard of Pb, Cd, Hg, and Cu was used as the research object, and the alkyl thiourea functionalised silica was used as a new heavy metal removal scavenger. The heavy metal removal process was optimised by orthogonal experiment with dynamic and static adsorption modes. Meanwhile, the content of Acanthopanax B and Acanthopanax E, the solid content, and the HPLC fingerprint similarity were used as quality monitoring indicators of Acanthopanax senticosus heavy metal removal before and after. Then, the technical adaptability of heavy metal removal by alkyl thiourea functionalised silica was evaluated. Under the optimal dynamic adsorption conditions, the average removal rates of Pb, Cd, Hg, and Cu were 91.64%, 93.04%, 81.77%, and 83.11%, respectively. Under the optimal static adsorption conditions, the average removal rates of Pb, Cd, Hg, and Cu were 82.22%, 89.95%, 81.26%, and 82.97%, respectively. During Acanthopanax senticosus extract heavy metal removal before and after, the change percentage of Acanthopanax B and Acanthopanax E was less than 2.00%, the solid content loss rate was only 0.18%, and the fingerprint similarity was over 99.9%. The method can be used to satisfy the high efficiency of selective removal of harmful elements in Acanthopanax senticosus extract and the effective composition of almost no effect; the method is simple and easy, so it can be recommended for pretreatment of heavy metals in Traditional Chinese Medicine extracts, and this way provides a new thought and research technique to decrease the contents of heavy metals.
ISSN:2314-6133
2314-6141
DOI:10.1155/2020/9860425