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Journal of Environmental Sciences 2006年第3期18卷 420-427页

作者： TIAN Yu ZHENG Lei sun de-zhi department of Environmental Science and Engineering Harbin Institute of Technology Harbin 150090 China.

Extracellular polymeric substances （EPS） are the predominant constituents of activated sludge and represent up to 80% of the mass of activated sludge. They play a crucial role in the flocculation, settling and dewatering of activated sludge. Furthermore, EPS also show great efficiency in binding heavy metals. So EPS are key factors influencing reduction in sludge volume and mass, as well as activity and utilization of sludge. EPS are of considerable environmental interest and hundreds of articles on EPS have been published abroad, while information on EPS in China is limited. In this paper, results of over 60 publications related to constituents and characteristics of EPS and their influences on flocculation, settling and dewatering of sludge are compiled and analyzed. Metal-binding ability of EPS is also discussed, together with a brief consideration of possible research interests in the future.

关键词： activated sludge environmental interest extracellular polymeric substances (EPS)

Formaldehyde degradation by UV/TiO_2/O_3 process using continuous flow mode

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Journal of Environmental Sciences 2007年第9期19卷 1136-1140页

作者： QI Hong sun de-zhi CHI Guo-qing School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 China.

The degradation of formaldehyde gas was studied using UV/TiO2/O3 process under the condition of continuous flow mode. The effects of humidity, initial formaldehyde concentration, residence time and ozone adding amount on degradation of formaldehyde gas were investigated. The experimental results indicated that the combination of ozonation with photocatalytic oxidation on the degradation of formaldehyde showed a synergetic action, e.g,, it could considerably increase decomposing of formaldehyde. The degradation efficiency of formaldehyde was between 73.6% and 79.4% while the initial concentration in the range of 1.84--24 mg/m^3 by O3/TiO2flJV process. The optimal humidity was about 50% in UV/TiO2/O3 processs and degradation of formaldehyde increases from 39.0% to 94.1% when the ozone content increased from 0 to 141 mg/m^3. Furthermore, the kinetics of formaldehyde degradation reaction could be described by Langmuir-Hinshelwood model. The rate constant k of 46.72 mg/（m^***） and Langmuir adsorption coefficient K of 0.0268 m^3/mg were obtained.

关键词： UV/TiO2/O3 process formaldehyde continuous flow mode

Advanced treatment of oil recovery wastewater from polymer flooding by UV/H_2O_2/O_3 and fine filtration

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Journal of Environmental Sciences 2006年第1期18卷 29-32页

作者： REN Guang-meng sun de-zhi Jong Shik CHUNK School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 China department of Chemical Engineering Pohang University of Science and Technology Pohang 790-784 Korea

In order to purify oil recovery wastewater from polymer flooding （ORWPF） in tertiary oil recovery in oil fields, advanced treatment of UV/H2O2/O3 and fine filtration were investigated. The experimental results showed that polyacrylamide and oil remaining in ORWPF after the conventional treatment process could be effectively removed by UV/H2O2/O3 process. Fine filtration gave a high performance in eliminating suspended solids. The treated ORWPF can meet the quality requirement of the wastewater-bearing polymer injection in oilfield and be safely re-injected into oil reservoirs for oil recovery.

关键词： oil recovery wastewater from polymer flooding UV/H2O2/O3 process polyacrylamide

Kinetics study on photochemical oxidation of polyacrylamide by ozone combined with hydrogen peroxide and ultraviolet radiation

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Journal of Environmental Sciences 2006年第4期18卷 660-664页

作者： REN Guang-meng sun de-zhi CHUNG Jong Shik School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 China department of Chemical Engineering Pohang University of Science and Technology Pohang 790-784 South Korea

An investigation on the process of ozone combined with hydrogen peroxide and ultraviolet radiation has been carried out in order to establish the kinetics for photochemical oxidation of polyacrylamide （PAM） in aqueous solution. Effects of operating parameters, including initial PAM concentration, dosages of ozone and hydrogen peroxide, UV radiation and pH value on the photochemical oxidation of PAM, have been studied. There was an increase in photochemical oxidation rate of PAM with increasing of dosages of 03, H2O2 and ultraviolet radiation. Upon increasing of the initial PAM concentration, the photochemical oxidation rate of PAM decreased. Slight effect of pH value on the photochemical oxidation rate of PAM was observed in the experiments. The kinetics equation for the photochemical oxidation of PAM by the system has been established.

关键词： photochemical oxidation polyacrylamide kinetics ozone/hydrogen peroxide/ultraviolet radiation

表型药物筛选技术助力基于中药的创新药物发现

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中国中药杂志 2024年第12期49卷 3125-3131页

作者：杨茜茹孙德志沈磐黄从书李永芳高月周维青海大学医学部药学系青海西宁810001 军事科学院军事医学研究院辐射医学研究所北京100850 天津中医药大学天津301617

我国中草药资源丰富,对复杂疾病具有良好的治疗作用,具有巨大的开发潜力。但其成分复杂,药效物质及其作用机制不明,且缺乏科学的临床安全性和有效性的评价方法,极大地限制了基于中药的创新药物研发。随着人工智能、仿生生物学等前沿学... 详细信息

我国中草药资源丰富,对复杂疾病具有良好的治疗作用,具有巨大的开发潜力。但其成分复杂,药效物质及其作用机制不明,且缺乏科学的临床安全性和有效性的评价方法,极大地限制了基于中药的创新药物研发。随着人工智能、仿生生物学等前沿学科的发展,特别是细胞画像、器官芯片等技术和产品的涌现,有望实现基于模型宏、微观性状或特征变化的中药及其组分功效的高通量鉴别,为中药的研发和应用提供更加精准的指导。因此,作为全新药物发现的主要手段之一,表型药物筛选在基于中药的创新药物研发过程中越来越受到关注。近年来,表型药物筛选技术不断发展更新,显著提升了新药早期发现率及后期研发成功率,逐渐成为全新药物研究的重要工具。该文通过探讨中药创新药物发现的潜力及挑战,结合表型药物筛选在新药发现中的优势,详细阐述了在细胞画像、深度学习和器官芯片等前沿技术的支持下,表型药物筛选技术的应用如何推动传统中医药进入新的发展阶段。

关键词：中药创新药物表型药物筛选高内涵筛选细胞画像器官芯片

Preparation and characterization of Fe_2O_3-CeO_2-TiO_2/γ-Al_2O_3 catalyst for degradation dye wastewater

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Journal of Environmental Sciences 2006年第6期18卷 1189-1192页

作者： LIU Yan sun de-zhi CHENG Lin LI Yan-ping School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 China

In order to develop a catalyst with high activity for catalytic wet oxidation （CWO） process at room temperature and atmospheric pressure, Fe2O3-CeO2-TiO2/γ-Al2O3 catalyst was prepared by consecutive impregnation method and the prepared parameters were optimized. The structure of the catalyst was characterized by BET, XRF, SEM and XPS technologies, and the actual wastewater was used to investigate the catalytic activity of Fe2O3-CeO2-TiO2/γ-Al2O3 in CWO process. The experimental results showed that the prepared catalyst exhibited good catalytic activity when the doping amount of Ti was 1.0 wt% （the weight ratio of Ti to carriers）, and the middle product, Fe2O3-CeO2-TiO2/γ-Al2O3, was calcined in 450℃ for 2 h. The CWO experiment for treating actual dye wastewater indicated that the COD, color and TOC of actual wastewater were decreased by 62.23%, 50.12% and 41.26% in 3 h, respectively, and the ratio of BOD5/COD was increased from 0.19 to 0.30.

关键词： catalytic wet oxidation (CWO) Fe2O3-CeO2-TiO2/γ-Al2O3 catalyst dye wastewater treatment

Mechanism study of electrochemical oxidation in the terylene diaphragm cell

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Journal of Environmental Sciences 2006年第1期18卷 33-39页

作者： YU Xiu-juan WANG Hui sun de-zhi SONG Lai-wen WU Lan department of Environmental Science and Engineering Heilongjiang University Harbin 150086 China School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 China

By using a self-made carbon/polytetrafluoroethylene （C/PTFE） O2-fed as cathode and Ti/IrO2/RuO2 as anode, the effects of electrochemical oxidation of phenol and the coal-gas wastewater containing phenol were studied. The terylene diaphragm which kept pH〉12 in cathodic compartment and pH〈1 in the anodic compartment was selected in the experiment in comparison with the other types of diaphragm. Furthermore, hydroxyl radical （HO·） was determined in the cathodic compartment of the diaphragm cell by electron spin resonance spectrum（ESR） and the fluorescence spectra. Compared with pH, the accumulated HzO2 and the COD removal of the no-diaphragm cell, the mechanism of electrochemical oxidation in the terylene diaphragm cell was supposed. The degradation of phenol was supposed to be cooperative oxidation by direct or indirect electrochemical oxidation at the anode and H2O2, HO· produced by oxygen reduction at the cathode. The mineralization of phenol in the diaphragm cell was better than that in the no-diaphragm cell. When the coal-gas wastewater was treated by the electrolysis system with terylene diaphragm, the average removal efficiency of the volatile phenol and COD were 100% and 79.6%, respectively.

关键词： electrochemical oxidation C/PTFE O2-fed cathode terylene diaphragm hydroxyl radical

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城镇污泥产品林地利用指南解读及技术应用

中国给水排水 2024年第10期40卷 21-27页

作者：姚大伟崔超张立秋熊建军孙德智杜子文杨文彬高始涛北京城市排水集团有限责任公司北京100044 北京林业大学环境科学与工程学院北京100083

为促进城镇污泥产品林地利用规范发展,中国环境科学学会批准发布了团体标准《城镇污水处理厂污泥产品林地利用工程化施用技术指南》(T/CSES 28—2021),并于2021年7月15日正式实施。介绍了该指南的编制背景、制定原则、主要技术内容,详... 详细信息

为促进城镇污泥产品林地利用规范发展,中国环境科学学会批准发布了团体标准《城镇污水处理厂污泥产品林地利用工程化施用技术指南》(T/CSES 28—2021),并于2021年7月15日正式实施。介绍了该指南的编制背景、制定原则、主要技术内容,详细阐述了关键技术说明,并通过北京地区污泥产品林地资源化应用案例,解析了指南中主要技术参数的操作方法。T/CSES 28—2021是以城镇污泥产品林地利用实用性为目的对现行国家及行业标准、指南、政策等文件的补充与完备,执行过程互不冲突。该指南对城镇污泥产品林地利用管理过程进行了全面梳理和总结,有利于提高我国污泥产品林地利用的规范性,推动并保障我国城镇污泥产品安全资源化利用工作的科学发展。

关键词：城镇污泥产品林地利用指南技术案例

Catalysts for decomposing ozone tail gas

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Journal of Environmental Sciences 2003年第6期15卷 779-782页

作者： LIU Chang-an, sun de-zhi, WANG Hui, LI Wei (department of Environmental Science and Engineering, Harbin Institute of Technology, Harbin 150001,China. department of Environmental Science and Engineering Harbin Institute of Technology Harbin 150001 China

The preparation of immobilizing-catalysts for decomposing ozone by using dipping method was studied. XRD, XPS and TEM were used to characterize the catalysts. The three kinds of catalysts were selected preferentially, and their catalytic activities were investigated. The results showed that the catalyst with activated carbon dipping acetate(active components are Mn:Cu=3:2, active component proportion in catalyst is 15%, calcination temperature is 200℃) has the best catalytic activity for ozone decomposing. One gram of catalyst can decompose 17.6 g ozone at initial ozone concentration of 2.5 g/m 3 and the residence time in reactor of 0.1 s. The experimental results also indicated that humidity of reaction system had negative effect on catalytic activity.

关键词： ozone tail gas catalytic decomposition immobilizing-catalyst MnO 2 CuO

Tetraethylenepentamine-functionalized magnetic mesoporous composites as a novel adsorbent for the removal Cr(Ⅲ)-ethylenediaminetetraacetic acid in complex solution

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Chinese Journal of Chemical Engineering 2024年第4期68卷 16-26页

作者： zhi Hu Jiahong Wang Tongtong sun School of Environmental Science and Engineering Shaanxi University of Science&TechnologyXi'an 710021China Shaanxi Key Laboratory of Green Preparation and Functionalization of Inorganic Materials Xi'an 710021China

A novel tetraethylenepentamine(TEPA) functionalized magnetic mesoporous silica adsorbent(FNMs/TEPA) was prepared for the adsorption of Cr(Ⅲ)-ethylenediaminetetraacetic acid(EDTA)from wastewater. The characterization of the prepared adsorbent certified that TEPA was modified onto the magnetic mesoporous silicon(FNMs), while FNMs/TEPA maintained the ordered mesoporous and pristine magnetic properties. The batch adsorption experiments demonstrated that TEPA significantly enhanced the removal capacity of the adsorbent for Cr(Ⅲ)-EDTA. FNMs/TEPA exhibited an excellent adsorption property(13.84 mg·g-1) at p H 4.0. Even in the presence of high concentrations of coexisting ions and organic acids, the adsorption performance of FNMs/TEPA was stable. Experimental characterization and DFT demonstrated that the adsorption of Cr(Ⅲ)-EDTA was ascribed to the electrostatic interaction, hydrogen bonding, and complexation between Cr(Ⅲ)-EDTA and amino groups on the adsorbent surface. The analysis of the independent gradient model(IGM) shows that electrostatic interaction is the main mode of action in the adsorption process. Moreover, FNMs/TEPA demonstrated remarkable reusability in three regeneration cycles. These findings indicated that FNMs/TEPA possessed excellent application prospects in the disposal of wastewater containing Cr(Ⅲ)-EDTA.

关键词： TEPA functionalized magnetic mesoporous silicon Adsorption Cr(III)-EDTA density functional theory calculations