微生物对几种水溶性聚合物的降解作用

Microbial Degradation of Water-Soluble Polymer

针对缓/控释肥料包裹材料的广泛应用,通过实验室微生物培养,对几种水溶性聚合材料生物降解作用进行了测定。结果表明,纳米-亚微米级聚乙醇混聚物、甲基丙烯酸羟乙酯混聚物在第4周最先开始降解,废弃聚苯乙烯泡沫塑料混聚物第8周才开始降解;聚乙烯醇混聚物、聚苯乙烯泡沫塑料混聚物、丙烯酸酯类混聚物在11-20周完全降解,苯乙烯-丙烯酸酯混聚物第20周后降解达98%,试验所用纳米-亚微米级聚乙醇混聚物等7种水溶性聚合物均可作为环境友好型缓释肥料包裹材料。

Slow release fertilisers （SRFs） could improve fertilizer use efficiency and simultaneously reduce environmental pollution and coated fertilizer accounted for 85% of SRFs. Here seven coating materials of water soluble polymer were examined to investigate their biodegradation in soil Results showed nano-subnano sized polyethylene alcohol mixture （CF2） and 2-Hydroxyethyl methacrylate mixture （JBQ） commenced the degradation from the 4^th week, while polystyrene foam mixture（N-PS） from the 8^th week. CF2, N-PS and acrylic ester mixture（N-BX） were degraded completely within 11-20 weeks. Polystyrene-Acrylate mixture （Sty-MM） needed 20 weeks to be degraded about 98% of it.