[Experimental teaching design of instrument analysis for undergraduate study: detection of bifenthrin pesticide residues in tea by response surface methodology-optimized QuEChERS combined with gas chromatography-mass spectrometry]. [PDF]
Gu CX.
europepmc +1 more source
本发明涉及贵金属催化剂,具体说是一种处理工业废水的贵金属催化剂及其制备和应用,以Ru或Pt为活性组分,Ru与Pt的担载量分别为催化剂总重量的1~5%和0.5~3%,以ZrO2-CeO2为载体,按重量百分比计,载体中含ZrO2 20~100%,CeO20~80%;载体过程制备:按目的催化剂载体中ZrO2和CeO2的配比量,将可溶性锆盐和铈盐溶于去离子水中,滴加重量浓度10%~25%氨水,调pH为8~12,滴加时间为1~1.5小时,将反应体系密闭,在90℃~100℃下煮沸60~90小时,过滤、洗涤、干燥 ...
孙承林, 杨民, 何雨, 杜鸿章
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湖北某牛磺酸生产企业废水处理工程,从企业生产工艺和废水水质特点出发,有针对性地采用“水解酸化+前缺氧+好氧生化+后缺氧+二沉”工艺处理该企业生产废水。进水平均COD、氨氮、总氮分别为956.8、50.6、99.1 mg/L时,出水平均COD、氨氮、总氮分别为73.6、1.6、12.2 mg/L,COD、氨氮、总氮平均去除率可分别达到92.3%、96.9%、87.7%,出水水质稳定,达到《化学合成类制药工业水污染物排放标准》(GB 21904—2008)中新建企业水污染物排放浓度限值 ...
彭继伟 +4 more
doaj
[Case-based teaching with both positive and negative examples in undergraduate analytical chemistry laboratory: determination of six nitrogen-containing pesticides in environmental samples by solid-phase microextraction-high performance liquid chromatography]. [PDF]
Zhang J +4 more
europepmc +1 more source
[Determination of ethylene oxide and acetaldehyde in petrochemical exhaust based on thermal desorption- gas chromatography-mass spectrometry]. [PDF]
Li YJ.
europepmc +1 more source
该研究首次将复合垂直流人工湿地同池塘养殖结合.通过构建养殖-湿地生态系统,验证人工湿地对水产养殖用水和废水净化与回用的可行性。近9个月的新建人工湿地运行结果表明,水力负荷从313、469、625mm/d增加到781mm/d,人工湿地对TSS、CODcr和BOD5去除率的变动范围分别为80.5%~82.9%、45.2%~64.2%和61.0%~77.0%,对NH4^+-N、NO3^-—N、TN去除率的变动范围分别为51.5%~67.8%、-90.6%~40.0%和29.1%~68.6 ...
贺锋 +4 more
core
[Determination of eight per- and polyfluoroalkyl substances in seawater using dispersive membrane extraction-ultra-high performance liquid chromatography-tandem mass spectrometry]. [PDF]
Ren Z +5 more
europepmc +1 more source
[Functional characterization of double-negative T cells isolated from leukoreduction filter residues]. [PDF]
Xiang Z +6 more
europepmc +1 more source
本文针对聚砜制膜废水特点,采用溶剂萃取一常、减压蒸馏-活性炭吸附的集成工艺,进行了该废水治理的工艺研究。结果表明,该工艺可使废水中的COD值由原来的20000-30000mg/L降低到40-60mg/L ...
刘元法 +3 more
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