Rice husk ash was used as a new, green, and cheap adsorbent for FeCl3. Characterization of the obtained reagent showed that rice husk ash supported FeCl2·2H2O was formed. This reagent is efficient at catalyzing t...Rice husk ash was used as a new, green, and cheap adsorbent for FeCl3. Characterization of the obtained reagent showed that rice husk ash supported FeCl2·2H2O was formed. This reagent is efficient at catalyzing the synthesis of multisubstituted quinolines by the Friedl鋘der heteroannulation of o‐aminoaryl ketones with ketones or β‐diketones under mild reaction conditions. This methodology allows for the synthesis of a broad range of substituted quinolines in high yields and with excellent regioselectivity in the absence of a solvent.展开更多
当今社会消耗了大量的化石能源,使得环境和能源问题十分突出。污泥厌氧消化产沼气是解决能源问题一种具有潜力的方法。然而,传统污泥厌氧消化存在效率低以及污泥停留时间长等问题,严重地阻碍了其优势的发挥。探究了添加不同浓度微量元...当今社会消耗了大量的化石能源,使得环境和能源问题十分突出。污泥厌氧消化产沼气是解决能源问题一种具有潜力的方法。然而,传统污泥厌氧消化存在效率低以及污泥停留时间长等问题,严重地阻碍了其优势的发挥。探究了添加不同浓度微量元素Fe和Ni对污泥厌氧消化产气和有机物去除的影响。结果表明,当FeCl_2投加量小于400 mg·L^(-1)时均能促进产气,FeCl_2投加量为25 mg·L^(-1)时,产气率取得最大值414.6 m L·g-1(VSadded),比对照组高28 m L·g-1(VSadded)。当NiCl_2投加量小于5 mg·L^(-1)时均能促进产气,在NiCl_2投加量为5 mg·L^(-1)时,产气率取得最大值389.5 m L·g-1(VSadded)。在最佳投加浓度下,添加Fe对产气的促进效果比添加Ni对产气的促进效果好。对有机物去除而言,当FeCl_2投加浓度为25 mg·L^(-1)时,有机物去除率轻微提升,而后随着FeCl_2添加量的增加整体呈下降趋势,FeCl_2最佳投加浓度为25 mg·L^(-1)。有机物去除率随着NiCl_2添加量的增加整体呈下降趋势。在水解产酸实验中,最优FeCl_2投加条件下(25 mg·L^(-1))能使污泥溶解态化学需氧量和挥发性脂肪酸浓度分别提高15.3%和39.2%,为后续的产气提供了更好的基质条件。展开更多
文摘Rice husk ash was used as a new, green, and cheap adsorbent for FeCl3. Characterization of the obtained reagent showed that rice husk ash supported FeCl2·2H2O was formed. This reagent is efficient at catalyzing the synthesis of multisubstituted quinolines by the Friedl鋘der heteroannulation of o‐aminoaryl ketones with ketones or β‐diketones under mild reaction conditions. This methodology allows for the synthesis of a broad range of substituted quinolines in high yields and with excellent regioselectivity in the absence of a solvent.
文摘当今社会消耗了大量的化石能源,使得环境和能源问题十分突出。污泥厌氧消化产沼气是解决能源问题一种具有潜力的方法。然而,传统污泥厌氧消化存在效率低以及污泥停留时间长等问题,严重地阻碍了其优势的发挥。探究了添加不同浓度微量元素Fe和Ni对污泥厌氧消化产气和有机物去除的影响。结果表明,当FeCl_2投加量小于400 mg·L^(-1)时均能促进产气,FeCl_2投加量为25 mg·L^(-1)时,产气率取得最大值414.6 m L·g-1(VSadded),比对照组高28 m L·g-1(VSadded)。当NiCl_2投加量小于5 mg·L^(-1)时均能促进产气,在NiCl_2投加量为5 mg·L^(-1)时,产气率取得最大值389.5 m L·g-1(VSadded)。在最佳投加浓度下,添加Fe对产气的促进效果比添加Ni对产气的促进效果好。对有机物去除而言,当FeCl_2投加浓度为25 mg·L^(-1)时,有机物去除率轻微提升,而后随着FeCl_2添加量的增加整体呈下降趋势,FeCl_2最佳投加浓度为25 mg·L^(-1)。有机物去除率随着NiCl_2添加量的增加整体呈下降趋势。在水解产酸实验中,最优FeCl_2投加条件下(25 mg·L^(-1))能使污泥溶解态化学需氧量和挥发性脂肪酸浓度分别提高15.3%和39.2%,为后续的产气提供了更好的基质条件。
