Table 4.

Efficiency and mechanism of different microbes for the removal of Cr (VI)

Microbes	Concentration (mg/L)	Carbon source	Temperature (°C)	pH	Efficiency	Mechanisms	References
Serratia sp. C8	20	Glucose	28	6–8	≈80%	Bioreduction	[120]
Sporosarcina saromensis M52	50–200	Acetate	35	7–8.5	>90%	Bioreduction	[121]
Sphingopyxis macrogoltabida SUK2c	4		31	2	55%	Biosorption	[122]
Bacillus sp. CRB-B1	100	Glucose	37	7	Completely	Bioreduction, biosorption	[123]
	100	Fructose	37	7	89.54%	Bioreduction, biosorption	[123]
	100	Sodium lactate	37	7	4.8%		[123]
Pisolithus sp1	25	Organic acid	30	5–6	99%	Bioreduction, biosorption	[124]
Aspergillus sp.	100	Sucrose	27	4	98.96%	Biosorption	[125]
Leiotrametes flavida	1000		30	6	72.38%	Biosorption	[126]
Bacillus cereus	200	Sucrose	37	7.5	Completely	Bioreduction, Biosorption	[127]