We fabricated and characterized two hybrid adsorbents originated from hydrated ferric oxides （HFOs） using a polymeric anion exchanger D201 and calcite as host. The resultant adsorbents （denoted as HFO-201 and IOCCS...We fabricated and characterized two hybrid adsorbents originated from hydrated ferric oxides （HFOs） using a polymeric anion exchanger D201 and calcite as host. The resultant adsorbents （denoted as HFO-201 and IOCCS） were employed for Sb（V） removal from water. Increasing solution pH from 3 to 9 apparently weakened Sb（V） removal by both composites, while increasing temperature from 293 to 313 K only improved Sb（V） uptake by IOCCS. HFO-201 exhibited much higher capacity for Sb（V） than for IOCCS in the absence of other anions in solution. Increasing ionic strength from 0.01 to 0.1 mol/L NaNO3 would result in a significant drop of the capacity of HFO-201 in the studied pH ranges; however, negligible effect was observed for 1OCCS under similar conditions. Similarly, the competing chloride and sulfate pose more negative effect on Sb（V） adsorption by HFO-201 than by IOCCS, and the presence of silicate greatly decreased their adsorption simultaneously, while calcium ions were found to promote the adsorption of both adsorbents. XPS analysis further demonstrated that preferable Sb（V） adsorption by both hybrids was attributed to the inner sphere complexation of Sb（V） and HFO, and Ca（II） induced adsorption enhancement possibly resulted from the formation of HFO-Ca-Sb complexes. Column adsorption runs proved that Sb（V） in the synthetic water could be effectively removed from 30 μg/L to below 5μg/L （the drinking water standard regulated by China）, and the effective treatable volume of IOCCS was around 6 times as that of HFO-201, implying that HFO coatings onto calcite might be a more effective approach than immobilization inside D201.展开更多
目的:探讨重度新生儿高胆红素血症发生急性胆红素脑病(ABE)的影响因素。方法:回顾性分析2018年1月至2020年5月本院123例重度新生儿高胆红素血症(血清总胆红素>342 μmol/L)患儿,根据是否发生ABE将其分为ABE组(28例)和非ABE组(95例),...目的:探讨重度新生儿高胆红素血症发生急性胆红素脑病(ABE)的影响因素。方法:回顾性分析2018年1月至2020年5月本院123例重度新生儿高胆红素血症(血清总胆红素>342 μmol/L)患儿,根据是否发生ABE将其分为ABE组(28例)和非ABE组(95例),比较两组患儿围生期资料及实验室检查结果,对单因素分析有统计学差异的变量纳入多因素Logistic回归分析。结果:单因素分析显示,ABE组血红蛋白水平、红细胞压积显著高于非ABE组;血清总胆红素值、住院时间及顺产、混合喂养、感染合并颅脑出血比例均显著高于非ABE组,差异均有统计学意义( P均<0.05)。多因素Logistic回归分析显示,血红蛋白水平高( OR=1.032,95% CI 1.007~1.057)、住院时间长( OR=1.15,95% CI 1.007~1.312)是ABE的独立危险因素,母乳喂养是ABE的保护因素( OR=0.151,95% CI 0.028~0.821)。 结论:血红蛋白值高、住院时间长是ABE的独立危险因素,母乳喂养是ABE的保护因素。展开更多
碳交易机制下,虚拟电厂(virtual power plant,VPP)聚合分布式能源(distributed energy resource,DER)参与电力市场(electricity market,EM)交易有助于新能源消纳与提升环境效益。为此,首先,构建风电、光伏、可控分布式电源、储能及柔性...碳交易机制下,虚拟电厂(virtual power plant,VPP)聚合分布式能源(distributed energy resource,DER)参与电力市场(electricity market,EM)交易有助于新能源消纳与提升环境效益。为此,首先,构建风电、光伏、可控分布式电源、储能及柔性负荷的多主体VPP模型,并制定各主体参与电能量市场(electric energy market,EEM)和调峰市场(peak regulating market,PRM)竞标策略。通过EEM及PRM算例展现了VPP参与调峰竞标实现VPP效益最大化及各DER成员利益的合理分配。其次,引入碳交易机制,分析碳交易价格变化与风光消纳率、碳排放量及VPP收益之间的关联性。最后,进一步探索碳汇资源交易对电力价格、产量及能源需求变化率的影响,为碳汇价值的生态保护补偿机制提供依据,也为电−碳市场协同下碳市场(carbon market,CM)对EM的价格传导效应及CM价格机制的优化设计提供参考。展开更多
基金supported by the National Natural Science Foundation of China(No.21177059)the Depart-ment of Science and Technology,Jiangsu Province(No.BK2012017/2011016,BE2012160)
文摘We fabricated and characterized two hybrid adsorbents originated from hydrated ferric oxides （HFOs） using a polymeric anion exchanger D201 and calcite as host. The resultant adsorbents （denoted as HFO-201 and IOCCS） were employed for Sb（V） removal from water. Increasing solution pH from 3 to 9 apparently weakened Sb（V） removal by both composites, while increasing temperature from 293 to 313 K only improved Sb（V） uptake by IOCCS. HFO-201 exhibited much higher capacity for Sb（V） than for IOCCS in the absence of other anions in solution. Increasing ionic strength from 0.01 to 0.1 mol/L NaNO3 would result in a significant drop of the capacity of HFO-201 in the studied pH ranges; however, negligible effect was observed for 1OCCS under similar conditions. Similarly, the competing chloride and sulfate pose more negative effect on Sb（V） adsorption by HFO-201 than by IOCCS, and the presence of silicate greatly decreased their adsorption simultaneously, while calcium ions were found to promote the adsorption of both adsorbents. XPS analysis further demonstrated that preferable Sb（V） adsorption by both hybrids was attributed to the inner sphere complexation of Sb（V） and HFO, and Ca（II） induced adsorption enhancement possibly resulted from the formation of HFO-Ca-Sb complexes. Column adsorption runs proved that Sb（V） in the synthetic water could be effectively removed from 30 μg/L to below 5μg/L （the drinking water standard regulated by China）, and the effective treatable volume of IOCCS was around 6 times as that of HFO-201, implying that HFO coatings onto calcite might be a more effective approach than immobilization inside D201.
文摘目的:探讨重度新生儿高胆红素血症发生急性胆红素脑病(ABE)的影响因素。方法:回顾性分析2018年1月至2020年5月本院123例重度新生儿高胆红素血症(血清总胆红素>342 μmol/L)患儿,根据是否发生ABE将其分为ABE组(28例)和非ABE组(95例),比较两组患儿围生期资料及实验室检查结果,对单因素分析有统计学差异的变量纳入多因素Logistic回归分析。结果:单因素分析显示,ABE组血红蛋白水平、红细胞压积显著高于非ABE组;血清总胆红素值、住院时间及顺产、混合喂养、感染合并颅脑出血比例均显著高于非ABE组,差异均有统计学意义( P均<0.05)。多因素Logistic回归分析显示,血红蛋白水平高( OR=1.032,95% CI 1.007~1.057)、住院时间长( OR=1.15,95% CI 1.007~1.312)是ABE的独立危险因素,母乳喂养是ABE的保护因素( OR=0.151,95% CI 0.028~0.821)。 结论:血红蛋白值高、住院时间长是ABE的独立危险因素,母乳喂养是ABE的保护因素。
文摘碳交易机制下,虚拟电厂(virtual power plant,VPP)聚合分布式能源(distributed energy resource,DER)参与电力市场(electricity market,EM)交易有助于新能源消纳与提升环境效益。为此,首先,构建风电、光伏、可控分布式电源、储能及柔性负荷的多主体VPP模型,并制定各主体参与电能量市场(electric energy market,EEM)和调峰市场(peak regulating market,PRM)竞标策略。通过EEM及PRM算例展现了VPP参与调峰竞标实现VPP效益最大化及各DER成员利益的合理分配。其次,引入碳交易机制,分析碳交易价格变化与风光消纳率、碳排放量及VPP收益之间的关联性。最后,进一步探索碳汇资源交易对电力价格、产量及能源需求变化率的影响,为碳汇价值的生态保护补偿机制提供依据,也为电−碳市场协同下碳市场(carbon market,CM)对EM的价格传导效应及CM价格机制的优化设计提供参考。
