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Physical, Chemical and Biological Characterization of Six Biochars Produced for the Remediation of Contaminated Sites
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Application of cotton straw biochar and compound Bacillus biofertilizer decrease the bioavailability of soil cd

Yongqi Zhu1, Xin Lv1, Jianghui Song1

  • 1Agricultural College, Shihezi University, 832003, Shihezi, Xinjiang, P. R. China.

BMC Microbiology
|January 27, 2022
PubMed
Summary
This summary is machine-generated.

Compound Bacillus biofertilizer and cotton straw biochar effectively remediate cadmium-contaminated soils. Bacillus biofertilizer showed superior performance in reducing available cadmium and enhancing soil health compared to biochar.

Keywords:
Bacteria diversityBiocharBiofertilizerCd bioavailabilityEnzyme activity

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An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium
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Area of Science:

  • Environmental Science
  • Soil Science
  • Microbiology

Background:

  • Cadmium (Cd) contamination poses a significant threat to soil environments, necessitating effective remediation strategies.
  • Understanding the impact of soil amendments on the biochemical properties of Cd-contaminated soils is crucial.

Purpose of the Study:

  • To investigate the effects of cotton straw biochar and compound Bacillus biofertilizer on Cd-contaminated soils.
  • To assess the impact of these amendments on soil biochemical properties, enzyme activity, and microbial diversity.

Main Methods:

  • Application of cotton straw biochar and compound Bacillus biofertilizer to soils with varying Cd concentrations (1, 2, and 4 mg·kg⁻¹).
  • Analysis of soil chemical characteristics, including C/N ratio, electrical conductance (EC), and pH.
  • Measurement of enzyme activities (alkaline phosphatase, invertase, catalase, urease) and assessment of microbial community diversity.

Main Results:

  • Both amendments significantly improved soil chemical properties and reduced available Cd content (up to 74.34%).
  • Cotton straw biochar increased alkaline phosphatase activity and bacterial abundance.
  • Compound Bacillus biofertilizer enhanced invertase, alkaline phosphatase, catalase, and urease activities, increasing bacterial community diversity.

Conclusions:

  • Cotton straw biochar and compound Bacillus biofertilizer effectively reduce available Cd, enhance microbial diversity, and mitigate Cd stress.
  • Compound Bacillus biofertilizer demonstrated greater efficacy than cotton straw biochar in Cd immobilization and overall soil quality improvement.