Applications of Cr-rich composted tannery sludge in the soil decrease microbial biomass and select specific bacterial groups

Author(s)

Ferreira Araujo, Ademir Sergio ; de Araujo Pereira, Arthur Prudencio ; Mendes, Lucas William

• Document type: Journal article
• Source: Environmental Science and Pollution Research; v. 29, n. 50, p. 6-pg., 2022-09-09.

Abstract

The tannery industries generate a solid waste known as tannery sludge, which is composed of organic and inorganic compounds, mainly chromium (Cr). When Cr is not removed from the tannery sludge, this solid waste is metal-rich and its application could affect the soil microorganisms. Alternatively, the composting of the tannery sludge can contribute to decreasing the concentration of Cr in the composted tannery sludge (CTS). However, in some cases, the concentration of Cr remains high in the CTS. During the last 10 years, the Cr-rich CTS has been successively applied in the soil, and its effect on soil microbial properties was verified. Here, we discuss the effect of successive applications of Cr-rich CTS on soil microbes. Interestingly, the findings have shown that successive applications of Cr-rich CTS selected specific soil microbial groups with potential functions. In addition, the studies added a new focus to further research evaluating the potential effect of successive applications of Cr-rich CTS on the rare microbial community. (AU)

• FAPESP's process: 19/16043-7 - Rhizosphere microbiome of the drought tolerant common bean
• Grantee: Lucas William Mendes
• Support Opportunities: Research Program on Global Climate Change - Young Investigators
• FAPESP's process: 20/12890-4 - Rhizosphere microbiome of the drought tolerant common bean
• Grantee: Lucas William Mendes
• Support Opportunities: Scholarships in Brazil - Research Program on Global Climate Change - Young Investigators