Reduction of antimony mobility from Sb-rich smelting slag by Shewanella oneidensis: Integrated biosorption and precipitation

Synthesis, characterization and performances of green rusts for water decontamination: A review.

Reduction of Antimony Mobility From Sb-rich Smelting Slag by Shewanella oneidensis: Integrated Biosorption and Precipitation

Antimony (Sb) in natural water has long-term effects on both the ecological environment and human health. Iron mineral phase transformation (IMPT) is a prominent process for removing Sb(V) from natural water. However, the importance of IMPT in eliminating Sb remains uncertain. This study examined the various Sb−Fe binding mechanisms found in different IMPT pathways in natural water, shedding light on the underlying mechanisms. The study revealed that the presence of goethite (Goe), hematite (Hem), and magnetite (Mag) significantly affects the concentration of Sb(V) in natural water. Elevated pH levels facilitated higher Fe content in iron solids but impeded the process of removing Sb(V). To further our understanding, polluted natural water samples were collected from various locations surrounding Sb smelter sites. Results confirmed that converting ferrihydrite (Fhy) to Goe significantly reduced Sb levels (<5 μg/L) in natural water. The emergence of secondary iron phases resulted in greater electrostatic attraction and stabilized surface complexes, which was the most likely cause of the decline of Sb concentration in natural water. The comprehensive findings offer new insight into the factors governing IMPT as well as the Sb(V) behavior control. 

Unveiling the crucial role of iron mineral phase transformation in antimony(V) elimination from natural water

Arsenic is a metalloid with a high risk of carcinogenesis. High levels of arsenic in the water and soil environment can directly impact on humans and ecosystems. Ferrihydrite plays an important role in controlling the mobility and toxicity of arsenic in contaminated soil and water. However, it is important to note that ferrihydrite is unstable in the environment and can undergo transformation, dissolution, and agglomeration. These processes significantly impact the conversion and fixation efficiency of arsenic. This article discusses the interaction mechanism and remediation effect of ferrihydrite with arsenic. It also summarizes the environmental behavior of ferrihydrite on arsenic under external factors such as water content, pH levels, environmental temperature, presence of Fe2+, types of ions in solution, organic matter, and coexisting minerals. Furthermore, it looks forward to future research and development directions, providing a valuable reference for the effective use of ferrihydrite to remediating arsenic-contaminated soil and water environments. 

The interaction between ferrihydrite and arsenic: A review of environmental behavior, mechanism and applied in remediation

Effect of Sb on precipitation of biogenic minerals during the reduction of Sb-bearing ferrihydrites

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Effect of Sb on precipitation of biogenic minerals during the reduction of Sb-bearing ferrihydrites