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- Title
Mechanism of Deep-Sea Microbial-Mediated Synergistic Synthesis of Ferromanganese Oxidation Products Process for Heavy Metal Ion Adsorption.
- Authors
Liu, Shunliang; Feng, Yali; Li, Haoran
- Abstract
Here we report the mechanism of adsorption and immobilization of heavy metal ions during the formation of deep-sea microbial-mediated Mn-Fe oxidation synergistic synthesis products under Mn concentration of 1 g/L, pH = 6, temperature of 25°C, adsorption time of 12 days, salinity of 3% and OMF inoculation of 20%. The adsorption amounts of heavy metal ion (Cu2+, Ni2+, and Co2+) by the deep-sea microbial-mediated Mn-Fe oxidation co-synthesis products were 11.81 mg/g, 9.52 mg/g, and 7.14 mg/g, respectively. The process was consistent with the Langmuir isothermal adsorption model and quasi-secondary kinetic model, indicating that the adsorption of heavy metal ion during the formation of the deep-sea microbial-mediated Mn-Fe oxidation co-synthesis products was controlled by chemisorption. FTIR and XPS results showed that the adsorption and fixation of heavy metal ions in the system mainly depended on the physical adsorption, ion exchange, functional group complexation, precipitation and electrostatic attraction effects of the functional groups on the surface of the manganese and iron oxidation products and oxidized low-valent manganese colonies. The introduction of iron ions improved the negative charge, specific surface area, active sites and surface activity of the adsorbent surface, which enhanced the adsorption of heavy metal ion by the oxidized low-valent manganese functional microbial-mediated manganese oxidation synergistic synthesis products. Meanwhile, this study provides a new theoretical basis for the pollution treatment of Cu2+, Ni2+, Co2+, Fe2+, and Mn2+ in heavy metal polluted water bodies and deep-sea manganese nodule mining processes with local exceedances.
- Subjects
METAL ions; LANGMUIR isotherms; FERROMANGANESE; IRON oxidation; PHYSISORPTION; HEAVY metals; IRON
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2023, Vol 75, Issue 12, p5405
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-023-06130-9