Bio-sorption capacity of cadmium and zinc by Pseudomonas monteilii with heavy-metal resistance isolated from the compost of pig manure

Bioresour Technol. 2024 Mar 13:130589. doi: 10.1016/j.biortech.2024.130589. Online ahead of print.ABSTRACTThe tolerance of Pseudomonas monteilii X1, isolated from pig manure compost, to Cd and Zn, as well as its capacity for biosorption were investigated. The minimum inhibitory concentration (MIC) of Cd and Zn for the strain were 550 mg/L and 800 mg/L, respectively. Untargeted metabolomics analysis revealed that organic acids and derivatives, lipids and lipids-like molecules, and organic heterocyclic compounds were main metabolomics. The glyoxylate and dicarboxylate metabolism pathway were significantly enriched under Cd2+ stress. The isothermal adsorption and adsorption kinetics experiments determined that the strain had adsorption capacities of 9.96 mg/g for Cd2+ and 23.4 mg/g for Zn2+. Active groups, such as hydroxyl, carboxyl and amino groups on the cell surface were found to participate in metal adsorption. The strain was able to convert Zn2+ into Zn3(PO4)2·4H2O crystal. Overall, this study suggested that Pseudomonas monteilii has potential as a remediation material for heavy metals.PMID:38490461 | DOI:10.1016/j.biortech.2024.130589

Source: Bioresource Technology - March 15, 2024 Category: Biotechnology Authors: Ping Wang Feixue Yue Cong Shao Qian Li Yining Shen Kaili Xu Zihan Shi Naiyu Liu Ronghua Li Zengqiang Zhang Source Type: research