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Removal of Pb~(2+)and biodegradation of organophosphorus have been both widely investigated respectively. However, bio-remediation of both Pb~(2+)and organophosphorus still remains largely unexplored. Bacillus subtilis FZUL-33, which was isolated from the sediment of a lake, possesses the capability for both biomineralization of Pb~(2+)and biodegradation of acephate. In the present study, both Pb~(2+)and acephate were simultaneously removed via biodegradation and biomineralization in aqueous solutions.Batch experiments were conducted to study the influence of p H, interaction time and Pb~(2+)concentration on the process of removal of Pb2+. At the temperature of 25°C, the maximum removal of Pb~(2+)by B. subtilis FZUL-33 was 381.31 ± 11.46 mg/g under the conditions of p H 5.5, initial Pb~(2+)concentration of 1300 mg/L, and contact time of 10 min. Batch experiments were conducted to study the influence of acephate on removal of Pb~(2+)and the influence of Pb2+on biodegradation of acephate by B. subtilis FZUL-33. In the mixed system of acephate–Pb2+, the results show that biodegradation of acephate by B. subtilis FZUL-33 released PO43+, which promotes mineralization of Pb2+. The process of biodegradation of acephate was affected slightly when the concentration of Pb2+was below 100 mg/L. Based on the results, it can be inferred that the B. subtilis FZUL-33 plays a significant role in bio-remediation of organophosphorus-heavy metal compound contamination.
However, bio-remediation of both Pb 2+ and organophosphorus still been largely unexplored. Bacillus subtilis FZUL-33, which was isolated from the sediment of a lake, possesses the capability for both biomineralization of Pb ~ (2+) and biodegradation of acephate. In the present study, both Pb ~ (2+) and acephate were simultaneously removed via biodegradation and biomineralization in aqueous solutions. Batch experiments were conducted to study the influence of p H, interaction time and Pb 2+ concentration on the process of removal of Pb 2+. At the temperature of 25 ° C, the maximum removal of Pb 2+ by B. subtilis FZUL-33 was 381.31 ± 11.46 mg / g under the conditions of p H 5.5, initial Pb 2+ concentration of 1300 mg / L, and contact time of 10 min. Batch experiments were conducted to study the influence of acephate on removal of Pb ~ (2+) and the influence of Pb2 + on biodegradation of acepha te by B. subtilis FZUL-33. In the mixed system of acephate-Pb2 +, the results show that biodegradation of acephate by B. subtilis FZUL-33 released PO43 +, which promotes mineralization of Pb2 +. The process of biodegradation of acephate was affected slightly when the concentration of Pb2 + was below 100 mg / L. Based on the results, it can be inferred that the B. subtilis FZUL-33 plays a significant role in bio-remediation of organophosphorus-heavy metal compound contamination.