[目的]对砂海星(Luidia quinaria von Martens)提取残渣进行营养成分分析,为砂海星资源的综合开发利用提供理论依据。[方法]水分、灰分、粗脂肪、蛋白质含量的测定参照国家标准中规定的方法进行;还原糖、总糖、多糖的测定采用3,5-二硝...[目的]对砂海星(Luidia quinaria von Martens)提取残渣进行营养成分分析,为砂海星资源的综合开发利用提供理论依据。[方法]水分、灰分、粗脂肪、蛋白质含量的测定参照国家标准中规定的方法进行;还原糖、总糖、多糖的测定采用3,5-二硝基水杨酸比色法;氨基酸的测定采用高效液相色谱法,色氨酸的测定参照国家标准中规定的方法进行;脂肪酸的测定采用气—质联用法;化学元素Ca、Mg、Fe、Pb、Mn、Zn、Cu、Ni、Co、Cr的测定采用原子吸收光谱法,Hg的测定采用原子荧光光谱法。[结果]砂海星提取残渣中水分含量为1.75%,灰分含量为81.40%,粗脂肪含量为0.67%,蛋白质含量为11.99%,还原糖含量为0.20%,总糖含量为2.16%,多糖含量为1.96%,总氨基酸含量为13.69%,脂肪酸中不饱和脂肪酸含量较少,化学元素中Ca、Mg、Fe含量较高。[结论]砂海星提取残渣营养成分含量丰富,具有较高的开发利用价值。展开更多
Sulfuric acid leaching process was applied to extract nickel from roasting-dissolving residue of a spent catalyst, the effect of different parameters on nickel extraction was investigated by leaching experiments, and ...Sulfuric acid leaching process was applied to extract nickel from roasting-dissolving residue of a spent catalyst, the effect of different parameters on nickel extraction was investigated by leaching experiments, and the leaching kinetics of nickel was analyzed. The experimental results indicate that the effects of particle size and sulfuric acid concentration on the nickel extraction are remarkable; the effect of reaction temperature is mild; while the effect of stirring speed in the range of 400-1 200 r/min is negligible. Decreasing particle size or increasing sulfuric acid concentration and reaction temperature, the nickel extraction efficiency is improved. 93.5% of nickel in residue is extracted under suitable leaching conditions, including particle size （0.074-0.100） mm, sulfuric acid concentration 30% （mass fraction）, temperature 80 ~C, reaction time 180 min, mass ratio of liquid to solid 10 and stirring speed 800 r/min. The leaching kinetics analyses shows that the reaction rate of leaching process is controlled by diffusion through the product layer, and the calculated activation energy of 15.8 kJ/mol is characteristic for a diffusion controlled process.展开更多
The study is focused on the extraction of valuable metals from automotive shredder residue(ASR)by different leaching solutions.First,ASR samples were roasted at 600°C to simulate a thermal treatment processing.Di...The study is focused on the extraction of valuable metals from automotive shredder residue(ASR)by different leaching solutions.First,ASR samples were roasted at 600°C to simulate a thermal treatment processing.Distilled water,citric and sulphuric acid were preliminarily investigated,thus two further full factorial systems entailing H2SO4–H2O2and H2SO4–H2O2–Fe3+were tested.The preliminary experimental results showed that0.1 mol·L-1H2SO4solution extracted 100%of Cu,Fe and Zn,whereas citric acid leached 100%of Zn and Pb,59%of Fe and 62%of Cu;whereas,H2SO4–H2O2and H2SO4–H2O2–Fe3+(Fenton's)leaching media showed that Cu,Fe and Zn can be extracted simultaneously and completely from the ASR ashes before final disposal.展开更多
文摘[目的]对砂海星(Luidia quinaria von Martens)提取残渣进行营养成分分析,为砂海星资源的综合开发利用提供理论依据。[方法]水分、灰分、粗脂肪、蛋白质含量的测定参照国家标准中规定的方法进行;还原糖、总糖、多糖的测定采用3,5-二硝基水杨酸比色法;氨基酸的测定采用高效液相色谱法,色氨酸的测定参照国家标准中规定的方法进行;脂肪酸的测定采用气—质联用法;化学元素Ca、Mg、Fe、Pb、Mn、Zn、Cu、Ni、Co、Cr的测定采用原子吸收光谱法,Hg的测定采用原子荧光光谱法。[结果]砂海星提取残渣中水分含量为1.75%,灰分含量为81.40%,粗脂肪含量为0.67%,蛋白质含量为11.99%,还原糖含量为0.20%,总糖含量为2.16%,多糖含量为1.96%,总氨基酸含量为13.69%,脂肪酸中不饱和脂肪酸含量较少,化学元素中Ca、Mg、Fe含量较高。[结论]砂海星提取残渣营养成分含量丰富,具有较高的开发利用价值。
基金Project (50574101) supported by the National Natural Science Foundation of ChinaProject (2003UDBEA00C020) supported by the Collaborative Project of School and Province of Yunnan Province,China
文摘Sulfuric acid leaching process was applied to extract nickel from roasting-dissolving residue of a spent catalyst, the effect of different parameters on nickel extraction was investigated by leaching experiments, and the leaching kinetics of nickel was analyzed. The experimental results indicate that the effects of particle size and sulfuric acid concentration on the nickel extraction are remarkable; the effect of reaction temperature is mild; while the effect of stirring speed in the range of 400-1 200 r/min is negligible. Decreasing particle size or increasing sulfuric acid concentration and reaction temperature, the nickel extraction efficiency is improved. 93.5% of nickel in residue is extracted under suitable leaching conditions, including particle size （0.074-0.100） mm, sulfuric acid concentration 30% （mass fraction）, temperature 80 ~C, reaction time 180 min, mass ratio of liquid to solid 10 and stirring speed 800 r/min. The leaching kinetics analyses shows that the reaction rate of leaching process is controlled by diffusion through the product layer, and the calculated activation energy of 15.8 kJ/mol is characteristic for a diffusion controlled process.
文摘The study is focused on the extraction of valuable metals from automotive shredder residue(ASR)by different leaching solutions.First,ASR samples were roasted at 600°C to simulate a thermal treatment processing.Distilled water,citric and sulphuric acid were preliminarily investigated,thus two further full factorial systems entailing H2SO4–H2O2and H2SO4–H2O2–Fe3+were tested.The preliminary experimental results showed that0.1 mol·L-1H2SO4solution extracted 100%of Cu,Fe and Zn,whereas citric acid leached 100%of Zn and Pb,59%of Fe and 62%of Cu;whereas,H2SO4–H2O2and H2SO4–H2O2–Fe3+(Fenton's)leaching media showed that Cu,Fe and Zn can be extracted simultaneously and completely from the ASR ashes before final disposal.
