Adsorption of Hg2+/Cr6+ by metal-binding proteins heterologously expressed in Escherichia coli

BMC Biotechnology

Table 1 Biosorption by microbes

Metal ions	Species	Biosorption capacity (μmol/g)	Removal rate	Source or form of biosorbents	References
Hg	Penicillium canescens	273.2		Free cells	[20]
Hg	Penicillium purpurogenum	351.0		Free cells	[21]
Hg	Escherichia coli BL21		43.7%	Free cells	[22]
Hg	Bacillus cereusb	519.0		immobilized cells	[23]
Hg	Bacillus sp	39.6		Free cells	[24]
Hg	Escherichia coli BL21	658.66	93.0%	Heterologous protein expression	Our study
Cr	Saccharomyces cerevisiae	154.8	99.6%	Chemical and thermal treatments	[25]
Cr	Sargassum oligocystum	662.7		CaCl₂-modified	[26]
Cr	Sphingopyxis macrogoltabida SUK2c	38.5	55%	Free cells	[27]
Cr	Bacillus licheniformis	1334.6		dead cells	[28]
Cr	Cronobacter muytjensii KSCAS2		76.51%	Free cells	[29]
Cr	Acinetobacter junii VITSUKMW2	426.9		Free cells	[30]
Cr	Escherichia coli BL21	46.73	24.2%	Heterologous protein expression	Our study

ISSN: 1472-6750