Cellulose-metallothionein biosorbent for removal of Pb(II) and Zn(II) from polluted water

Journal article

Mwandira, W., Nakashima, K., Yuki, T., Sato, T. and Kawasaki, S. (2019). Cellulose-metallothionein biosorbent for removal of Pb(II) and Zn(II) from polluted water. Chemosphere. 246 (125733), pp. 1-7. https://doi.org/10.1016/j.chemosphere.2019.125733
AuthorsMwandira, W., Nakashima, K., Yuki, T., Sato, T. and Kawasaki, S.
Abstract

Intake of toxic trace elements in drinking water can lead to adverse health effects. To remove toxic trace
elements from water, we developed a novel biosorbent composed of cellulose and a fusion protein. The
fusion protein was constructed from metallothionein (MT) and a carbohydrate-binding module (CBM),
where CBM can bind to cellulose while MT can capture heavy metal ions in solution. In a batch experiment,
the biosorbent had maximum biosorption capacities for Pb(II) and Zn(II) ions of 39.02 mg/g and
29.28 mg/g, respectively. Furthermore, the biosorbent could be used in a semi-continuous system and
showed good regeneration and recyclability. Both cellulose and the MT-CBM are environmentally
friendly and renewable materials, and this biosorbent has great potential for efficient removal of toxic
trace elements from polluted water.

KeywordsMetallothionein, Cellulose, Biosorbent, Adsorption, Metal ions, Mine wastewater
Year2019
JournalChemosphere
Journal citation246 (125733), pp. 1-7
PublisherElsevier
ISSN0045-6535
Digital Object Identifier (DOI)https://doi.org/10.1016/j.chemosphere.2019.125733
Web address (URL)https://www.sciencedirect.com/science/article/pii/S0045653519329741
Publication dates
Print26 Dec 2019
Publication process dates
Accepted22 Dec 2019
Deposited13 May 2022
Accepted author manuscript
License
File Access Level
Open
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