排序方式: 共有78条查询结果,搜索用时 15 毫秒
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含有重金属铬的含铬革屑制革废弃物,如果不能有效处理,将会造成环境污染及人类等健康损害。在环境问题日益严重和资源日趋贫乏的今天,对含铬革屑的资源化利用具有巨大的环境和经济价值。本文简述了近年来对含铬革屑的利用方法。 相似文献
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分别采用硝酸铝-亚硝酸钠比色法、苯酚-硫酸法、凯氏定氮法、七叶苷标准溶液测定竹茹提取物(WEBS)中的总黄酮、总糖、蛋白质和内酯含量,氨基酸全自动分析仪及HPLC法测定氨基酸和有机酸种类及含量,同时利用琼脂平板扩散法研究其对食品腐败菌的抑制作用。结果表明,该竹茹提取物pH3.62,总黄酮含量0.251mg/mL,总糖含量0.383mg/mL,蛋白质含量0.625mg/mL,内酯1.439mg/mL,含有草酸、乳酸、酒石酸。抑菌效果与浓度之间正相关,对细菌的抑制作用明显大于酵母和霉菌,其中对枯草芽孢杆菌的抑菌效果最明显。不同的热处理条件对抑菌效果影响不大。 相似文献
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氧化镁法水解含铬革屑的氨基酸分析 总被引:4,自引:1,他引:4
利用氨基酸分析仪 ,对铬革屑的氧化镁法水解产物和水解残渣中的氨基酸组成进行了分析。发现有 8种氨基酸在残渣中的含量高于水解液中的含量 ,其中中性氨基酸比碱性氨基酸的含量高 ,带苯环的中性氨基酸比带脂肪族的中性氨基酸的含量高 相似文献
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Chunqi Fang Guojun Lv Jianhua Yan Xuliang Lin Huibo Song 《Energy Sources, Part A: Recovery, Utilization, and Environmental Effects》2019,41(7):881-891
Chrome-tanned leather shavings (CTLS) are a type of solid waste generated from the leather industry. In this study, the pyrolysis experiment of CTLS was conducted in a high-temperature tubular furnace reactor at different temperatures. The results showed that the pyrolysis temperature highly affected the product yields. The tar generated from the CTLS pyrolysis presented a wide distribution of pyrolytic compounds, and nitrogenated derivatives were the major group. The scanning electronic microscopy (SEM) investigation showed that a continuous structure of irregular but rather uniformly distributed interconnected pores of the chars. Cr was found to exist in the char as its reduced state (Cr3+). This study provided basic data for the determination of pyrolysis temperatures of CTLS targeting different products. 相似文献