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PAHs removal by soil washing with thiacalix[4]arene tetrasulfonate

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Environmental Science and Ecotechnology 2024年第5期21卷 256-267页

作者： Le-Yao Xing Guan-Han Meng Ji-Xian Yang ming-Han xu yi-ming xu Hai-Xiao Xie Ai-Jie Wang yi-Lu Sun State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin150090China Key Laboratory of Environmental Biotechnology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing100085China Hangzhou Yanqu Information Technology Co. Ltd.Y2Hangzhou310003China

Remediating soil contaminated with polycyclic aromatic hydrocarbons(PAHs)presents a significant environmental challenge due to their toxic and carcinogenic *** PAHs remediation methodsdchemical,thermal,and bioremediationdalong with conventional soil-washing agents like surfactants and cyclodextrins face challenges of cost,ecological harm,and *** we show an effective and environmentally friendly calixarene derivative for PAHs removal through soil ***[4]arene tetrasulfonate(TCAS)has a unique molecular structure of a sulfonate group and a sulfur atom,which enhances its solubility and facilitates selective binding with *** forms host-guest complexes with PAHs through p-p stacking,OH-p interactions,hydrogen bonding,van der Waals forces,and electrostatic *** interactions enable partial encapsulation of PAH molecules,aiding their desorption from the soil *** results show that a 0.7%solution of TCAS can extract approximately 50%of PAHs from contaminated soil while preserving soil nutrients and minimizing adverse environmental *** research unveils the pioneering application of TCAS in removing PAHs from contaminated soil,marking a transformative advancement in resource-efficient and sustainable soil remediation strategies.

关键词： Calixarenes Soil-washing Host-guest interaction PAHs

Preoperative localization and minimally invasive management of primary hyperparathyroidism concomitant with thyroid disease

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2007年第9期8卷 626-631页

作者： ZHENG yi-xiong xu Shao-ming WANG Ping, CHEN Li Department of Surgery the Second Affiliated Hospital School of Medicine Zhejiang University Hangzhou 310009 China

The coexistence of thyroid diseases with primary hyperparathyroidism (PHPT) can present a challenge in the clinical diagnosis and management for these patients. This study aims to determine the frequency of coexisting thyroid gland lesions in a consecutive series patients with PHPT, and to analyze the clinical features, diagnosis and treatment of these patients. Twenty-two cases of a total of 52 PHPT patients who had synchronous thyroid and parathyroid pathology were surgically managed in this study. Thirteen patients had ipsilateral thyroid nodules, and 9 patients had thyroid nodules in contralateral or bilateral side. Seven patients underwent direct parathyroidectomy and hemithyroidectomy via a mini-incision (about 3 cm), while other 15 procedures were converted to Kocher incision. Seventeen nodular goiter (32.7%), 2 thyroiditis (3.8%), 2 thyroid adenoma (3.8%) and 1 thyroid carcinoma (1.9%) coexisting with parathyroid adenoma were pathologically diagnosed. The sensitivity of preoperative ultra-sonography (US) and methoxy-isobutyl-isonitrile (MIBI) scintigraphy for parathyroid lesions was 63.6% and 85.7%; and the overall positive predictive values for MIBI and US were 100% and 95.5% respectively. A high incidence of thyroid diseases that coexisted with PHPT in literatures was briefly reviewed. Our study illustrated the need for clinical awareness of concomitant PHPT and thyroid disease. A combination of US, computed tomography (CT) and MIBI scintigraphy would be recommended for preoperative localization of enlarged parathyroid adenoma and for evaluation of thyroid lesions. Synchronous treatment of asso-ciated thyroid abnormalities is desirable, and open minimally invasive surgical approach with additional resection of isolated ipsilateral thyroid nodules is possible in some of these patients.

关键词： Hyperparathyroidism Thyroid diseases Imaging diagnosis Surgical treatment

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高纯度中孔分子筛MCM-41的合成与表征

高等学校化学学报 1999年第5期20卷 670-674页

作者：许宜铭浙江大学化学系

用不同ｐＨ值的混合物制备了不同孔径的全硅ＭＣＭ－４１和不同金属离子取代的Ｍ－ＭＣＭ－４１（Ｍ＝Ａｌ，Ｍｎ，Ｆｅ和Ｖ）分子筛．这些试样均呈现ＭＣＭ－４１的Ｘ射线粉末衍射特征峰和Ⅳ型氮气吸附等温线，但混有不同含量的无定形... 详细信息

用不同ｐＨ值的混合物制备了不同孔径的全硅ＭＣＭ－４１和不同金属离子取代的Ｍ－ＭＣＭ－４１（Ｍ＝Ａｌ，Ｍｎ，Ｆｅ和Ｖ）分子筛．这些试样均呈现ＭＣＭ－４１的Ｘ射线粉末衍射特征峰和Ⅳ型氮气吸附等温线，但混有不同含量的无定形氧化硅．样品中ＭＣＭ－４１晶体的含量与溶胶的ｐＨ值和所用表面活性剂的碳链链长有关．骨架硅的金属离子取代降低了ＭＣＭ－４１的有序度。

关键词：全硅 MCM-41 金属聚代中孔分子筛分子筛

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苯乙酮的TiO_2光催化降解及其影响因素

高等学校化学学报 2000年第10期21卷 1539-1542页

作者：许宜铭浙江大学化学系硅材料科学国家重点实验室杭州310027

在TiO2 (DegussaP2 5)和波长大于 3 50nm的光作用下 ,水中苯乙酮 ( 1× 1 0 -5～ 1× 1 0 -4 mol/L)能发生光催化降解 ,生成邻羟基苯乙酮等中间产物 .该降解过程遵循Langmuir Hinshelwood动力学方程 ,降解速率随入射光强度的增强和溶液... 详细信息

在TiO2 (DegussaP2 5)和波长大于 3 50nm的光作用下 ,水中苯乙酮 ( 1× 1 0 -5～ 1× 1 0 -4 mol/L)能发生光催化降解 ,生成邻羟基苯乙酮等中间产物 .该降解过程遵循Langmuir Hinshelwood动力学方程 ,降解速率随入射光强度的增强和溶液起始 pH值的增大而增大 ,但反应温度的影响较小 ,其降解反应的表观活化能为4 2～ 6

关键词：苯乙酮二氧化钛光催化降解催化活性

Progress of antibiotic-loaded bone cement in joint arthroplasty

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Chinese Medical Journal 2020年第20期133卷 2486-2494页

作者： yi-ming xu Hui-ming Peng Bin Feng Xi-Sheng Weng Department of Orthopedics Peking Union Medical College HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100730China

Bone cement, consisting of polymethyl methacrylate, is a bioinert material used for prothesis fixation in joint arthroplasty. To treat orthopedic infections, such as periprosthetic joint infection, antibiotic-loaded bone cement (ALBC) was introduced into clinical practice. Recent studies have revealed the limitations of the antibacterial effect of ALBC. Moreover, with the increase in high infection risk patients and highly resistant microbes, more researches and modification of ALBC are required. This paper reviewed latest findings about ALBC for most popular and destructive pathogens, summarized the influence of antibiotic kind, drug dosage, application method, and environment towards characteristic of ALBC. Subsequently, new cement additives and clinical applications of ALBC in joint arthroplasty were also discussed.

关键词： Polymethyl methacrylate Bone cement Antibiotic Modification

Proton linac-based therapy facility for ultra-high dose rate (FLASH) treatment

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Nuclear Science and Techniques 2021年第4期32卷 1-9页

作者： Wen-Cheng Fang Xiao-Xia Huang Jian-Hao Tan Chao-Peng Wang Cheng-Cheng Xiao yi-Xing Lu Yu Zhang Yu-Qing Yang yi-ming xu Han-Yu Gong Jun-Qiang Zhang Shao-Peng Zhong Zhen-Tang Zhao Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201204China University of Chinese Academy of Sciences Beijing 100049China Shanghai APACTRON Particle Equipment Company Limited Shanghai 201800China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China

As an advanced treatment method in the past five years,ultra-high dose rate(FLASH)radiotherapy as a breakthrough and milestone in radiotherapy development has been verified to be much less harmful to healthy tissues in different *** treatments require an instantaneous dose rate as high as hundreds of grays per second to complete the treatment in less than 100 *** proton therapy facilities with the spread-out of the Bragg peak formed by different energy layers,to our knowledge,cannot easily achieve an adequate dose rate for FLASH treatments because the energy layer switch or gantry rotation of current facilities requires a few seconds,which is relatively long.A new design for a therapy facility based on a proton linear accelerator(linac)for FLASH treatment is proposed *** is designed under two criteria:no mechanical motion and no magnetic field *** new therapy facility can achieve an ultrahigh dose rate of up to 300 Gy/s;however,it delivers an instantaneous dose of 30 Gy within 100 ms to complete a typical FLASH *** design includes a compact proton linac with permanent magnets,a fast beam kicker in both azimuth and elevation angles,a fixed gantry with a static superconducting coil to steer proton bunches with all energy,a fast beam scanner using radio-frequency(RF)deflectors,and a fast low-level RF *** relevant principles and conceptual proposals are presented herein.

关键词： Proton therapy FLASH Proton linac Deflector Superconducting coil Fast scanner

氟离子掺杂和吸附对二氧化钛光催化活性的影响

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物理化学学报 2012年第3期28卷 641-646页

作者：高岳君许宜铭浙江大学化学系杭州310027

已有文献报道,在二氧化钛的体相和表面分别掺杂和吸附氟离子,都能加快水中有机化合物的光催化降解.前者归结于表面形成的三价钛离子促进光生载流子分离,后者归结于双电层中的氟离子促进羟基自由基脱附.但是,有关它们之间的活性差异未见... 详细信息

已有文献报道,在二氧化钛的体相和表面分别掺杂和吸附氟离子,都能加快水中有机化合物的光催化降解.前者归结于表面形成的三价钛离子促进光生载流子分离,后者归结于双电层中的氟离子促进羟基自由基脱附.但是,有关它们之间的活性差异未见有文献报道.本文采用水热法,以钛酸丁酯和氟化铵为原料,合成出具有不同氟离子掺杂量的光催化剂.通过苯酚降解反应,研究氟化钠和硝酸银外部加入对这些催化剂光催化性能的影响.结果表明:无论是处于二氧化钛的体相,还是处于二氧化钛的双电层外层和内层,这些氟离子都能促进苯酚的光催化降解.但是,它们的相对活性依次降低.此外,在催化剂的水悬浮液中,同时加入硝酸银和氟化钠,能进一步加快苯酚的光催化降解,且该反应的速率远远大于单独加入氟化钠或硝酸银时的速率总和.这说明将导带电子的还原过程和价带空穴的氧化过程耦合起来,是提高二氧化钛光催化量子效率的有效途径.

关键词：光催化二氧化钛氟离子掺杂吸附