Table 4: Biosorption capacities of Bacillus spp. Q = capacity
Source or form, pretreatment Metal Q [mg/g] pH T [°C] Ref.
B. cereus As3+ 32.4 7.5 (opt.) 30 [52]
B. cereus, soil sample, fixed-bed Pb2+ 59.2 6 (opt.) 25 [78]
B. cereus, soil sample Pb2+ 22.1 6 (opt.) 25 [78]
B. coagulans,H2SO4-treated Cr6+ 39.9 2.5 28 ± 3 [80]
A polysaccharide from B. firmus Pb2+ 1103 4.5 (opt.) 25 [55]
Cu2+ 860 4 (opt.) 25  
Zn2+ 722 6 (opt.) 25  
B. gibsonii S-2, soil sample, dried Pb2+ 333.3 4 (opt.) 40 (opt.) [50]
B. lentus,ferm. waste Cd2+ 85 4.5 - [70]
B. lentus, ferm. waste, HCl-treated Cd2+ 37 4.5 - [70]
Cu2+ 30 4.5 -  
Zn2+ 13 4.5 -  
B. megaterium,H2SO4-treated Cr6+ 30.7 2.5 28 ± 3 [80]
B. pumilus, soil sample, fixed-bed Pb2+ 66.0 6 (opt.) 25 [78]
B. pumilus, soil sample Pb2+ 28.1 6 (opt.) 25 [78]
B. subtilis, dried Cr3+ 23.9 4 (opt.) 60 (opt.) [51]
B.thuringiensis, NaOH-treated Cd2+ 48.3 6 28 [79]
Cu2+ 23.6 5 28  
B. thuringiensi s, spore-crystal mixtures Ni2+ 41.8 6 (opt.) 35 (opt.) [81]
B.thuringiensisvegetative cells Ni2+ 29.2 6 (opt.) 35 (opt.) [81]
B. thuringiensis,spore-vegetative cells Cr6+ 54.7 2.0 (opt.) 25 (opt.) [82]
B.thuringiensis,spore-crystal mixture Cr6+ 61.5 2.0 (opt.) 25 (opt.) [82]
Unidentified, soil sample,powdered Pb2+ 92.3 3 (opt.) 25 [56]
Cu2+ 16.3 5 (opt.) 25