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A novel strategy of tannery sludge disposal–converting into biochar and reusing for Cr(Ⅵ)removal from tannery wastewater

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Journal of Environmental Sciences 2024年第4期138卷 637-649页

作者： Zhiwei Li Di Yu Xingdong Wang Xuejiao Liu zhen Xu yin Wang CAS Key Laboratory of Urban Pollutant Conversion Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control CAS Haixi Industrial Technology Innovation Center in BeilunNingbo 315830China Key Laboratory of Urban Environment and Health Ningbo Observatio

Tannery sludge with high chromium content has been identified as hazardous solid waste due to its potential toxic *** safety disposal and valorization of the tannery sludge remains a *** this study,the chromium stabilization mechanism was systematically investigated during chromium-rich tannery sludge was converted to biochar and the removal performance of the sludge biochar(SBC)for Cr(Ⅵ)from tannery wastewater was also *** results showed that increase in pyrolysis temperature was conductive to the stabilization of Cr and significant reduction of the proportion of Cr(Ⅵ)in *** was confirmed that the stabilization of chromium mainly was attributed to the embedding of chromium in the C matrix and the transformation of the chromium-containing substances from the amorphous Cr(OH)_(3)to the crystalline state,such as(FeMg)Cr_(2)O_(5).The biochar presented high adsorption capacity of Cr(Ⅵ)at low pH and the maximal theoretical adsorption capacity of SBC produced at 800°C can reach 352 mg Cr(Ⅵ)/g,the process of which can be well expressed by Langmuir adsorption isotherm and pseudo second order *** electrostatic effect and reduction reaction were dominantly responsible for the Cr(Ⅵ)adsorption by ***,this study provided a novel strategy for the harmless disposal and resource utilization for the solid waste containing chromium in leather industry.

关键词： Chromium-rich tannery sludge Pyrolysis Biochar Stabilizationmechanisms Cr(Ⅵ)adsorption

Wet-chemistry synthesis of cobalt carbide nanoparticles as highly active and stable electrocatalyst for hydrogen evolution reaction

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Nano Research 2017年第4期10卷 1322-1328页

作者： Siwei Li Ce Yang zhen yin Hanjun Yang Yifu Chen Lili Lin Mengzhu Li Weizhen Li Gang HU Ding Ma College of Chemistry and Molecular Engineering Peking University Beijing 100871 China State Key Laboratory of Separation Membranes and Membrane Processes Department of Chemical Engineering Tianjin Polytechnic University Tianjin 300387 China Israel Chemicals Limited Shanghai 200021 China

Transition metal carbide （TMC） nanomaterials are promising alternatives to Pt, and are widely used as heterogeneous electrocatalysts for the electrochemical hydrogen evolution reaction （HER）. In this work, a bromide-induced wet-chemistry strategy to synthesize Co2C nanoparticles （NPs） was developed. Such NPs exhibited high electrocatalytic activity （η= 181 mV for j = -10 mA·cm^-2） and long-term stability （no obvious performance decrease after 4,000 cycles） for the HER. This study will pave the way for the design and fabrication of TMC NPs via a wet- chemistry method, and will have significant impacts on broader areas such as nanocatalysis and energy conversion.

关键词： Co2C nanoparticle wet-chemistry synthesis hydrogen evolution reaction synergetic effect

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渭南高温时空变化特征及其定量化评估

陕西气象 2024年第3期 38-43页

作者：马耀绒韩蓓蓓尹贞钤许伟峰渭南市气象局陕西渭南714000 陕西省气象局秦岭和黄土高原生态环境气象重点实验室西安710016

利用渭南市11个县(市、区)气象站1971—2020年的逐日最高气温资料,结合单站高温过程综合强度指标算法,得到渭南各县(市、区)高温天气综合强度等级划分阈值,并根据单站高温过程阈值,确定出区域性高温过程强度等级以及全市性高温过程强度... 详细信息

利用渭南市11个县(市、区)气象站1971—2020年的逐日最高气温资料,结合单站高温过程综合强度指标算法,得到渭南各县(市、区)高温天气综合强度等级划分阈值,并根据单站高温过程阈值,确定出区域性高温过程强度等级以及全市性高温过程强度等级定量化评估方法,分析了渭南市高温时空分布特征。结果表明:(1)渭南市高温频次、强度总体呈南多北少的分布特征,南部的华州、临渭、华阴是高温事件高发的关键区域;渭南高温天气出现时间跨度为4月中旬至10月上旬,6—8月高温最多,占全年的93.9%,其中7月下旬各个区域的高温日数达到最多,往后逐渐减少。(2)20世纪70年代以来,渭南高温过程呈现出增长趋势,80年代至今,高温过程逐渐增多,过程极值和高温等级增高,高温有出现时间趋早和结束时间趋晚的变化特征。(3)对提出的单站高温天气过程综合强度指标计算方法、区域性和全市性高温过程强度等级确定方法,进行检验和业务试用评估,其对高温过程综合强度进行合理排位,结果科学可信。

关键词：高温定量评估时空变化特征渭南市

“纵深推进全面深化改革与重庆创新探索”笔谈

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改革 2024年第3期 1-25页

作者：杨瑞龙刘尚希尹振涛王微刘现伟姚树洁刘嗣方黄朝永中国人民大学中国财政科学研究院中国社会科学院金融研究所不详中国宏观经济研究院经济体制与管理研究所重庆大学经济与工商管理学院重庆社会科学院数字重庆建设领导小组办公室

习近平总书记在二十届中央全面深化改革委员会第一次会议上指出,“实现新时代新征程的目标任务,要把全面深化改革作为推进中国式现代化的根本动力,作为稳大局、应变局、开新局的重要抓手”。全面深化改革是实现中国式现代化的关键一招,... 详细信息

习近平总书记在二十届中央全面深化改革委员会第一次会议上指出,“实现新时代新征程的目标任务,要把全面深化改革作为推进中国式现代化的根本动力,作为稳大局、应变局、开新局的重要抓手”。全面深化改革是实现中国式现代化的关键一招,关系党和人民事业前途命运。自党的十八届三中全会通过《中共中央关于全面深化改革若干重大问题的决定》至今,已十年有余。十年多来,我们推动的改革是全方位、深层次、根本性的,取得的成就是历史性、革命性、开创性的。

关键词：中国式现代化《中共中央关于全面深化改革若干重大问题的决定》党的十八届三中全会创新探索十年全面深化改革纵深推进重要抓手

机器人辅助腹腔镜与传统腹腔镜治疗肾上腺肿瘤的疗效对比分析

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联勤军事医学 2024年第1期38卷 49-52页

作者：谢豪豪潘铁军涂忠宋健谢秋波尹震武汉科技大学医学院湖北武汉430065 中部战区总医院泌尿外科

目的对比分析机器人辅助腹腔镜手术与传统腹腔镜手术治疗肾上腺肿瘤的手术效果,评估二者之间的优缺点。方法回顾性分析作者医院泌尿外科2020-08/2021-08月由同一术者行肾上腺肿瘤切除术49例患者的病历资料。其中,机器人组27例,传统腹腔... 详细信息

目的对比分析机器人辅助腹腔镜手术与传统腹腔镜手术治疗肾上腺肿瘤的手术效果,评估二者之间的优缺点。方法回顾性分析作者医院泌尿外科2020-08/2021-08月由同一术者行肾上腺肿瘤切除术49例患者的病历资料。其中,机器人组27例,传统腹腔镜组22例。比较两组患者的术中出血量、手术时间、术后引流时间、术后住院时间。结果机器人组与传统腹腔镜组均手术成功,无术中转开放手术患者,术后无并发症发生。两组患者在手术时间上比较差异无统计学意义(P>0.05)。机器人组患者较传统腹腔镜组患者术中出血量少、术后引流时间和术后住院时间短,且差异具有统计学意义(P均<0.05)。结论对于手术切除肾上腺肿瘤,机器人辅助腹腔镜手术相比于传统腹腔镜手术在手术时间上并无明显差异,但在控制术中出血量及术后恢复方面有一定的优势。

关键词：肾上腺肿瘤机器人辅助腹腔镜传统腹腔镜疗效分析

Uniqueness of rate-dependency, creep and stress relaxation behaviors for soft clays

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Journal of Central South University 2015年第1期22卷 296-302页

作者：朱启银尹振宇徐长节殷建华夏小和 Department of Civil Engineering Shanghai Jiao Tong University State Key Laboratory for Geomechanics and Deep Underground Engineering(China University of Mining and Technology) Lunan University Ecole Centrale de NantesUMR CNRS Ge M Nantes France School of Civil Engineering and Architecture Departments East China Jiaotong University Department of Civil and Environmental Engineering Hong Kong Polytechnic University

This work focuses on the uniqueness of rate-dependency, creep and stress relaxation behaviors for soft clays under one-dimensional condition. An elasto-viscoplastic model is briefly introduced based on the rate-dependency of preconsolidation pressure. By comparing the rate-dependency formulation with the creep based formulation, the relationship between rate-dependency and creep behaviors is firstly described. The rate-dependency based formulation is then extended to derive an analytical solution for the stress relaxation behavior with defining a stress relaxation coefficient. Based on this, the relationship between the rate-dependency coefficient and the stress relaxation coefficient is derived. Therefore, the uniqueness between behaviors of rate-dependency, creep and stress relaxation with their key parameters is obtained. The uniqueness is finally validated by comparing the simulated rate-dependency of preconsolidation pressure, the estimated values of secondary compression coefficient and simulations of stress relaxation tests with test results on both reconstituted Illite and Berthierville clay.

关键词： soft clays creep rate-dependency stress relaxation oedometer test

PERFORMANCE AND INITIATION MECHANISM OF ISOPROPYLTHIOXANTHONE IN SURFACE PHOTOGRAFTING

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Chinese Journal of Polymer Science 2000年第5期18卷 431-435页

作者： Wan-tai Yang Mei-zhen yin Yu-feng Sun College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China 北京化工大学北京

In a polymerization model with low density polyethylene (LDPE) as the substrate and acrylic acid (AA) as the monomer, the performance of isopropylthioxanthone (ITX) in initiating surface photografting polymerization was evaluated. The results show that the reactivity of photopolymerization and photografting of ITX locate between benzophenone (BP) and benzildimethylketal (BDK) for polymerization, BDK > ITX > BP; for surface grafting polymerization, BP > ITX > BDK. These results can be explained by a reaction mechanism of the inter-molecular or intra-molecular hydrogen abstraction reaction of ITX.

关键词： photografting polymerization photopolymerization hydrogen abstraction reaction

Nurses’ clinical alarm-related behaviors and influencing factors in China

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Frontiers of Nursing 2022年第2期9卷 173-186页

作者： Zhu-Jun Liao Li-Qing Yue Huan Peng Jing Chen Zeng-zhen yin Shuo-Ting Hu zhen Li Teaching and Research Section of Clinical Nursing Xiangya Hospital of Central South UniversityChangshaHunan 410000China Department of Rheumatology and Immunology Xiangya HospitalCentral South UniversityChangshaHunan 410000China Xiangya Nursing School of Central South University ChangshaHunan 410200China

Objective:To explore the nurses’behaviors regarding clinical alarms,analyze the related influencing factors,and provide rationales for alarm ***:A cross-sectional survey was conducted in *** self-made questionnaire of nurses’clinical alarm-related knowledge,attitude,and behavior(NCAKAB)was ***:The valid response rate was 98.66%(n=2368).The average nurses’clinical alarm-related behaviors(NCAB)score was 65.14±7.95(out of 85).The dimension scores of NCAB from high to low were alarm learning(4.02±0.85,out of 5),alarm response(27.99±3.64,out of 35),alarm setting(19.24±3.88,out of 25),alarm recognition(7.63±1.68,out of 10)and alarm notification(6.25±1.84,out of 10).There were significant differences in alarm behavior scores between nurses of different ages(F=4.619,P=0.000),nursing stints(F=9.564,P=0.000),professional titles(F=4.425,P=0.004),departments(F=9.166,P=0.000),and hospital levels(t=2.705,P=0.007).The study showed that nurses’total alarm behavior scores were positively correlated with the total alarm knowledge score(r=0.267;P<0.001)and the total alarm attitude score(r=438;P<0.001).Conclusions:Nurses scored highest in alarm learning,followed by alarm response,alarm setting,alarm recognition,and alarm notification *** factors that influenced alarm behavior included age,title,department,nursing stint,hospital level,professional title,alarm-related training,willingness to participate in alarm-related training,whether or not departments have improved alarm management over the last 3 years,and whether or not departments have formulated norms for alarm *** with higher scores for clinical alarm knowledge had higher correlating scores for alarm behavior;similarly,nurses with higher scores for clinical alarm attitude had higher scores for alarm-related behavior.

关键词： behavior clinical alarm factors nurses patient safety

Synthesis of magnetic carrier sub-microparticles with high stability through carbon reduction and solation coating methods

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Rare Metals 2016年第11期35卷 870-873页

作者： Qiang Zhang Li-Bo Gao Jun-Yang Li Ze-Bin Guo zhen-yin Hai Yan-Ting Xing Chen-Yang Xue National Key Laboratory for Electronic Measurement Technology North University of China Science and Technology on Electronic Test & Measurement Laboratory North University of China

This paper presents a novel approach in synthesizing SiO_2-Fe_3O_4magnetic carrier with high *** Fe_3O_4 magnetic powders were synthesized via onestep method named carbon reduction method. The advantages of the methods are of simple process, none lead-in pollution agent, low cost and adaptation to large-lot production. The stability of the magnetic powders is improved through modifying the Fe_3O_4 with SiO_2 in solation *** results of the characterizations show that the superparamagnetic SiO_2-Fe_3O_4sub-microparticles（~600 nm）with saturation intensity of 36.4 m A·m^2·g^（-1）are obtained successfully. Moreover, the quantitating, repeatability and high stability of the carbon reduction method are demonstrated as well.

关键词： Carbon reduction method Superparamagnetic Fe304-SiO2