Zinc Oxide Nanoparticles Enhance the Tolerance and Remediation Potential of Bacillus spp. against Heavy Metal Stress

Table 1

Effect of different concentrations of ZnO nanoparticles (0, 5, 10, 15, 20, and 25 ppm) on maximum inhibitory concentration (MIC) of Bacillus cereus and Lysinibacillus macroides under heavy metal (Pb, Cd, Cr, and Cu) stress.

Treatments (mg/L)	Heavy metals (ppm)
	Lead	Chromium	Cadmium	Copper
Bacillus cereus
Control	300	125	175	200
5 mg/L ZnO NPs	350	150	200	225
10 mg/L ZnO NPs	375	175	250	250
15 mg/L ZnO NPs	400	225	275	275
20 mg/L ZnO NPs	350	200	225	250
25 mg/L ZnO NPs	325	150	200	200
Lysinibacillus macroides
Control	200	175	150	125
5 mg/L ZnO NPs	250	200	175	150
10 mg/L ZnO NPs	225	250	200	175
15 mg/L ZnO NPs	250	275	250	200
20 mg/L ZnO NPs	225	200	225	150
25 mg/L ZnO NPs	200	200	225	125