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1Effects of different Ca^(2+) behavior patterns in the electric field on membrane fouling formation and removal of trace organic compounds显示文摘The effects of Ca^(2+) on membrane fouling and trace organic compounds(TrOCs)removal in an electric field-assisted microfiltration system were investigated in the presence of Na^(+) alone for comparison.In the electric field,negatively charged bovine serum albumin(BSA)migrated towards the anode far away from the membrane surface,resulting in a 42.9%transmembrane pressure(TMP)reduction in the presence of Na^(+) at 1.5 V.In contrast,because of the stronger charge shielding of Ca^(2+),the electrophoretic migration of BSA was limited and led to a neglectable effect of the electric field(1.5 V)on membrane fouling.However,under 3 V applied voltage,the synergistic effects of electrochemical oxidation and bridging interaction between Ca^(2+) and BSA promoted the formation of denser settleable flocs and a thinner porous cake layer,which alleviated membrane fouling with a 64.5%decrease in TMP and nearly 100%BSA removal.The Tr OCs elimination increased with voltage and reached29.4%–80.4%at 3 V.The electric field could prolong the contact between Tr OCs and strong oxidants generated on the anode,which enhanced the Tr OCs removal.However,a stronger charge shielding ability of Ca^(2+) weakened the electric field force and thus lowered the Tr OCs removal.Zhen Du Min Ji Ruying Li 2022Journal of Environmental Sciences2022,34,1:1
2分子光谱技术在氯丙嗪检测中的应用研究进展显示文摘氯丙嗪是临床中应用较为广泛的精神活性物质,因其对病毒的抑制作用及滥用而成为临床的关注热点。分子光谱技术不仅是检测体系构建和反应机制解析的重要手段,也是新兴检测技术发展的基础。本文主要基于分子运动产生的吸收、发射和散射等现象,从测定的原理、条件等方面综述了紫外-可见分光光度计、分子荧光、化学发光、表面增强拉曼散射、共振瑞利散射等光谱技术在氯丙嗪分析中的应用进展,探讨和展望了分子光谱法在氯丙嗪相关研究中的应用前景,以期为氯丙嗪的检测、药理学、毒理学、风险评估方面研究提供参考。张惠峰 宋志峰 2023中国医药导报2023,20,33:0
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