生物降解

Abstract(#br)High-temperature-cured silicone rubber samples (silicone rubber (SIR) based on polydimethylsiloxane (PDMS)) and SIR samples containing three different antimicrobial agents, sodium benzoate (NaB), DCOIT (4,5 Dichloro-2-octyl-2H-isothiazolone-one) and p-aminobenzoic acid (PABA) were inoculated with fungal spore suspensions and incubated for 28 days at 29\u003cce:hsp sp=\"0.2\"/\u003e±\u003cce:hsp sp=\"0.2\"/\u003e1\u003cce:hsp sp=\"0.25\"/\u003e°C and ≥90% humidity, according to the ISO 846:1997(E) protocol.

Abstract(#br)We investigated the effects of different bioavailability scenarios on the rhamnolipid-enhanced biodegradation of pyrene by the representative polycyclic aromatic hydrocarbon degrader Mycobacterium gilvum VM552. This biosurfactant enhanced biodegradation when pyrene was provided in the form of solid crystals; no effect was observed when the same amount of the chemical was preloaded on polydimethylsiloxane (PDMS). An enhanced effect was observed when pyrene was sorbed into soil but not with the dissolved compound.

Abstract\n\t\t\t\t\n\t\t\t\t\tHigh-temperature-cured silicone rubber samples (silicone rubber (SIR) based on polydimethylsiloxane (PDMS)) and SIR samples containing three different antimicrobial agents, sodium benzoate (NaB), DCOIT (4,5 Dichloro-2-octyl-2H-isothiazolone-one) and p-aminobenzoic acid (PABA) were inoculated with fungal spore suspensions and incubated for 28 days at 29\n\t\t\t\t\t\t±\n\t\t\t\t\t\t1\n\t\t\t\t\t\t°C and ≥90% humidity, according to the ISO 846:1997(E) protocol.

用于油/水分离的疏水性磁性吸收剂多孔基材的大多数成分有毒、环境不相容、难以降解。为了解决这一问题，本工作成功制备了磁性壳聚糖( CS )基聚二甲基硅氧烷( PDMS )修饰的气凝胶。通过CS、衣康酸和Fe3O4纳米颗粒( FeNPs )在水溶液中的静电作用构建磁性多孔基底，然后进行冷冻干燥过程。通过PDMS的交联反应将疏水性能呈现给基底。制备的气凝胶密度低( 0.0655 g / cm3 )，孔隙率高( 92 % )，对测试有机液体具有较高的吸收能力( 8.89 ~ 22.38 g / g )。硅烷化过程使气凝胶具有优异的疏水性能(水接触角为147.1 ° )，从而选择性地从不相溶的油水混合物和水包油乳液中吸油。由于FeNPs分布均匀，通过外加磁场实现了气凝胶的远程控制，其饱和磁化强度为11.22   emu / g，并且气凝胶还可以通过充当过滤器重油和水。实验结果表明，这种可再生、环保、双功能的气凝胶在含油废水修复方面具有很大的潜力。