Summary and Prospect of Microbial Degradation of Roxarsone

Present, Roxarsone is the most economical organic arsenarsone preparation, which is widely used in the breeding industry as a feed additive. However, due to the low absorption and conversion efficiency of Roxarsone in livestock and poultry, a large amount of Roxarsone flows into the external environment along with excrement. Simple composting and conventional sewage treatment can‘t be completely removed, but discharged into water and soil, resulting in arsenic compound pollution. In addition, microorganisms or light in the environment can degrade Roxarsone into a variety of arsenic compounds, such as 4-hydroxy-3-aminobenzene arsenic acid (HAPA), which can cause serious harm to the environment and human body. At present, in addition to physical and chemical methods, microbial method also has a good degradation effect of Roxarsone. This paper reviewed the research progress on the non-biodegradation and biodegradation transformation of Roxarsone and its related products. The main conclusions are: the non-biodegradation and bio-degradation transformation of Roxarsone is greatly affected by environmental factors, and it is easy to produce more toxic pollutants. Biodegradation and transformation: the irreplaceable role of microorganisms is mainly reflected in: (1) Microbial adsorption and accumulation, including reversible and irreversible processes; (2) Bacterial degradation of Roxarsone; (3) Degradation of Roxarsone by fungi; (4) Degradation of Roxarsone by yeast. Finally, the prospect of applying microbial method to Roxarsone pollution remediation was discussed.