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Article summary:
1. Fe-P species constitute an important part of P speciation in non-digested sludge.
2. Ascorbic acid (VC) and acidity were used to release P from sludge, with a synergistic effect producing the greatest P release of 67.1%.
3. Released P and Fe2+ can be recovered as vivianite with recovery rates of 88% and 99%, respectively.
Article analysis:
The article “Enhanced phosphorus release from waste activated sludge using ascorbic acid reduction and acid dissolution” is a well-written piece that provides an overview of the use of ascorbic acid (VC) and acidity to release phosphorus (P) from sludge, with a synergistic effect producing the greatest P release of 67.1%. The article is written in a clear and concise manner, providing detailed information on the process, results, and implications for future research.
The article is based on sound scientific evidence, including SEM-EDS analysis, sequential extraction methods, laser particle size analyzer measurements, X-ray photoelectron spectrum analyzer measurements, etc., which provide reliable data for the authors’ conclusions. Furthermore, the authors have provided references to other relevant studies that support their findings.
The article does not appear to be biased or one-sided in its reporting; it presents both sides equally by discussing both the advantages and disadvantages of using VC and acidity to release P from sludge. Additionally, potential risks are noted throughout the article; for example, it mentions that VC can disrupt the sludge floc structure which could lead to organic efflux.
In conclusion, this article is trustworthy and reliable due to its sound scientific evidence base and unbiased reporting style.