资源类型

期刊论文 645

会议视频 13

会议信息 1

年份

2024 1

2023 45

2022 64

2021 69

2020 38

2019 51

2018 43

2017 36

2016 29

2015 32

2014 45

2013 27

2012 14

2011 26

2010 26

2009 20

2008 22

2007 21

2006 4

2005 6

展开 ︾

关键词

医学 5

治疗 4

绿色化工 4

人工智能 3

化工 3

SARS-CoV-2 2

中药 2

剖宫产瘢痕妊娠 2

化学反应 2

化学吸收 2

化学循环 2

印染废水 2

反渗透 2

废水 2

煤化工 2

2 1

4-二硝基茴香醚 1

6016 合金 1

ADAM10抑制剂 1

展开 ︾

检索范围：

排序： 展示方式：

Using ultrasound to improve the sequential post-synthesis modification method for making mesoporous Y zeolites

Rongxin Zhang, Peinan Zhong, Hamidreza Arandiyan, Yanan Guan, Jinmin Liu, Na Wang, Yilai Jiao, Xiaolei Fan

《化学科学与工程前沿（英文）》 2020年 第14卷 第2期   页码 275-287 doi: 10.1007/s11705-019-1905-1

摘要： Mesoporous Y zeolites were prepared by the sequential chemical dealumination (using chelating agents such as ethylenediaminetetraacetic acid, H EDTA, and citric acid aqueous solutions) and alkaline desilication (using sodium hydroxide, NaOH, aqueous solutions) treatments. Specifically, the ultrasound-assisted alkaline treatment (i.e., ultrasonic treatment) was proposed as the alternative to conventional alkaline treatments which are performed under hydrothermal conditions. In comparison with the hydrothermal alkaline treatment, the ultrasonic treatment showed the comparatively enhanced efficiency (with the reduced treatment time, i.e., 5 min vs. 30 min, all with 0.2 mol·L NaOH at 65°C) in treating the dealuminated Y zeolites for creating mesoporosity. For example, after the treatment of a dealuminated zeolite Y (using 0.1 mol·L H EDTA at 100°C for 6 h), the ultrasonic treatment produced the mesoporous zeolite Y with the specific external surface area ( ) of 160 m ·g and mesopore volume ( ) of 0.22 cm ·g , being slightly higher than that by the conventional method (i.e., = 128 m ·g and = 0.19 cm ·g ). The acidic property and catalytic activity (in catalytic cracking of -octane) of mesoporous Y zeolites obtained by the two methods were comparable. The ultrasonic desilication treatment was found to be generic, also being effective to treat the dealuminated Y zeolites by citric acid. Additionally, the first step of chemical dealumination treatment was crucial to enable the effective creation of mesopores in the parent Y zeolite (with a silicon-to-aluminium ratio, Si/Al= 2.6) regardless of the subsequent alkaline desilication treatment (i.e., ultrasonic or hydrothermal). Therefore, appropriate selection of the condition of the chemical dealumination treatment based on the property of parent zeolites, such as Si/Al ratio and crystallinity, is important for making mesoporous zeolites effectively.

关键词： zeolite Y     mesoporous zeolite     post-synthesis treatment     ultrasound     chemical dealumination treatment     alkaline desilication treatment    

HTML PDF 收藏

Dealumination and desilication for Al-rich HZSM-5 zeolite via steam-alkaline treatment and its application

Yuehua Fang, Fan Yang, Xuan He, Xuedong Zhu

《化学科学与工程前沿（英文）》 2019年 第13卷 第3期   页码 543-553 doi: 10.1007/s11705-018-1778-8

摘要： The hierarchical HZSM-5 was prepared via dealumination and desilication of commercial Al-rich HZSM-5, and characterized by X-ray diffraction, Al magic-angle spinning nuclear magnetic resonance, inductively coupled plasma mass spectrometry, scanning electron microscope, transmission electron microscope, N adsorption-desorption, NH temperature-programmed desorption, performed thermogravimetric and Raman spectrum. The results showed that partial framework of HZSM-5 was removed after steam treatment at 0.15 MPa, 500°C for 3 h. HZSM-5 with high specific surface area and much mesoporosity was obtained by the subsequent alkaline treatment. The regulation of acid quantity was achieved by altering the concentration of alkaline. Dealumination and desilication of Al-rich HZSM-5 zeolites became more effective using a combination of steam and alkaline treatments than using alkaline treatment alone. Methanol aromatization reaction was employed to evaluate the catalytic performance of treated HZSM-5 at 0.15 MPa, 450°C and MHSV of 1.5 h . The results indicated that after steam treatment, HZSM-5 further treated with 0.2 mol/L NaOH exhibits the best catalytic performance: the selectivity of aromatics reached 42.1% and the lifetime of catalyst attained 212 h, which are much better than untreated HZSM-5.

关键词： steam treatment     alkaline treatment     hierarchical ZSM-5     methanol aromatization    

HTML PDF 收藏

Applying chemical sedimentation process in drinking water treatment plant to address the emergent arsenic

Pengfei LIN,Xiaojian ZHANG,Hongwei YANG,Yong LI,Chao CHEN

《环境科学与工程前沿（英文）》 2015年 第9卷 第1期   页码 50-57 doi: 10.1007/s11783-014-0733-2

摘要： Arsenic (As) spills occurred more frequently and sometimes polluted water sources in recent years in China. It is as urgent need to develop emergency treatment technologies to address the arsenic threat for large-scale water treatment plants. In response, we developed a chemical sedimentation technology to remove arsenic contaminants for water treatment plants. Bench-scale experiments were conducted to investigate the efficiency of arsenic removal and the influencing factors of the chemical sedimentation treatment process. The influencing factors included the choice and dosage of coagulants, the valence of arsenic and pH value of solution. The As(V) contaminants can be almost completely removed by ferric or alum coagulants. The As(III) contaminants are more recalcitrant to chemical sedimentation, 75% for ferric coagulant and 40% for alum coagulant. The quantitative results of arsenic removal load by different ferric or alum coagulants were presented to help determine the parameters for arsenic treatment technology. The dominant mechanism for arsenic removal is static combination, or adsorption of negative arsenic species onto positive ferric hydroxide or alum hydroxide flocs. The efficiency of this treatment technology has also been demonstrated by a real production test in one water treatment plant with arsenic-rich source water and one emergency response. This technology was verified to be quick to set-up, easy to operate and highly efficient even for high concentration of arsenic.

关键词： Arsenic spill     chemical sedimentation     coagulation     drinking water     emergency treatment    

HTML PDF 收藏

Increasing significance of advanced physical/chemical processes in the development and application ofsustainable wastewater treatment systems

RULKENS Wim

《环境科学与工程前沿（英文）》 2008年 第2卷 第4期   页码 385-396 doi: 10.1007/s11783-008-0073-1

摘要： The awareness of the problem of the scarcity of water of high quality has strongly changed the approach of wastewater treatment. Currently, there is an increasing need for the beneficial reuse of treated wastewater and to recover valuable products and energy from the wastewater. Because microbiological treatment methods are, only to a limited part, able to satisfy these needs, the role and significance of physical/chemical processes in wastewater treatment are gaining more and more interest. The specific future role and aim of the various physical/chemical treatment processes can be categorized in five groups: improvement of the performance of microbiological treatment processes, achievement of the high quality required for reuse of the effluent, recovery of valuable components and energy from the wastewater for beneficial reuse, desalination of brackish water and seawater, and treatment of concentrated liquid or solid waste residues produced in a wastewater treatment process. Development of more environmentally sustainable wastewater treatment chains in which physical/chemical processes play a crucial role, also requires application of process control and modeling strategies. This is briefly introduced by the elaboration of treatment scenarios for three specific wastewaters.

关键词： control     beneficial     valuable     scarcity     Development    

HTML PDF 收藏

Alkaline modification of ZSM-5 catalysts for methanol aromatization: The effect of the alkaline concentration

Zhenhao Wei,Tengfei Xia,Minghui Liu,Qingsheng Cao,Yarong Xu,Kake Zhu,Xuedong Zhu

《化学科学与工程前沿（英文）》 2015年 第9卷 第4期   页码 450-460 doi: 10.1007/s11705-015-1542-2

摘要： The effects of alkaline treatment on the physical properties of ZSM-5 catalysts and on their activities for methanol to aromatics conversion have been investigated. A mild alkaline treatment (0.2 and 0.3 mol/L NaOH) created mesopores in the parent zeolite with no obvious effect on acidity. The presence of mesopores gives the catalyst a longer lifetime and higher selectivity for aromatics. Treatment with 0.4 mol/L NaOH decreased the number of Brønsted acid sites due to dealumination and desilication, which resulted in a lower deactivation rate. In addition, more mesopores were produced than with the mild alkaline treatment. As a result, the lifetime of the sample treated with 0.4 mol/L NaOH was almost five times that of the parent ZSM-5. Treatment with a higher alkaline concentration (0.5 mol/L) greatly reduced the number of Brønsted acid sites and the number of micropores resulting in incomplete methanol conversion. When the alkaline-treated catalysts were washed with acid, some of the porosity was restored and a slight increase in selectivity for aromatics was obtained.

关键词： aromatics     ZSM-5     alkaline treatment     dealumination     desilication     mesopores     methanol    

HTML PDF 收藏

Using loose nanofiltration membrane for lake water treatment: A pilot study

《环境科学与工程前沿（英文）》 2021年 第15卷 第4期 doi: 10.1007/s11783-020-1362-6

摘要：

• A pilot study was conducted for drinking water treatment using loose NF membranes.

关键词： Nanofiltration     Drinking water     Membrane fouling     Aluminum carryover     Chemical cleaning    

HTML PDF 收藏

Pesticide wastewater treatment using the combination of the microbial electrolysis desalination and chemical-production

Songwei Lin, Yaobin Lu, Bo Ye, Cuiping Zeng, Guangli Liu, Jieling Li, Haiping Luo, Renduo Zhang

《环境科学与工程前沿（英文）》 2020年 第14卷 第1期 doi: 10.1007/s11783-019-1191-7

摘要： MEDCC combined with Fenton process was developed to treat real pesticide wastewater. Pesticide removal was attributable to desalination in the MEDCC. High COD removal was attributable to organic distributions in different chambers. The combination of the microbial electrolysis desalination and chemical-production cell (MEDCC) and Fenton process for the pesticide wastewater treatment was investigate in this study. Real wastewater with several toxic pesticides, 1633 mg/L COD, and 200 in chromaticity was used for the investigation. Results showed that desalination in the desalination chamber of MEDCC reached 78%. Organics with low molecular weights in the desalination chamber could be removed from the desalination chamber, resulting in 28% and 23% of the total COD in the acid-production and cathode chambers, respectively. The desalination in the desalination chamber and organic transfer contributed to removal of pesticides (e.g., triadimefon), which could not be removed with other methods, and of the organics with low molecular weights. The COD in the effluent of the MEDCC combined the Fenton process was much lower than that in the perixo-coagulaiton process (<150 vs. 555 mg/L). The combined method consumed much less energy and acid for the pH adjustment than that the Fenton.

关键词： Pesticide wastewater     COD removal     Microbial electrolysis desalination and chemical-production cell     Energy consumption     Fenton oxidation    

HTML PDF 收藏

Locally enhanced electric field treatment (LEEFT) for water disinfection

Jianfeng Zhou, Ting Wang, Cecilia Yu, Xing Xie

《环境科学与工程前沿（英文）》 2020年 第14卷 第5期 doi: 10.1007/s11783-020-1253-x

摘要： • Nanowire-assisted LEEFT is applied for water disinfection with low voltages. • LEEFT inactivates bacteria by disrupting cell membrane through electroporation. • Multiple electrodes and device configurations have been developed for LEEFT. • The LEEFT is low-cost, highly efficient, and produces no DBPs. • The LEEFT can potentially be applicable for water disinfection at all scales. Water disinfection is a critical step in water and wastewater treatment. The most widely used chlorination suffers from the formation of carcinogenic disinfection by-products (DBPs) while alternative methods (e.g., UV, O3, and membrane filtration) are limited by microbial regrowth, no residual disinfectant, and high operation cost. Here, a nanowire-enabled disinfection method, locally enhanced electric field treatment (LEEFT), is introduced with advantages of no chemical addition, no DBP formation, low energy consumption, and efficient microbial inactivation. Attributed to the lightning rod effect, the electric field near the tip area of the nanowires on the electrode is significantly enhanced to inactivate microbes, even though a small external voltage (usually<5 V) is applied. In this review, after emphasizing the significance of water disinfection, the theory of the LEEFT is explained. Subsequently, the recent development of the LEEFT technology on electrode materials and device configurations are summarized. The disinfection performance is analyzed, with respect to the operating parameters, universality against different microorganisms, electrode durability, and energy consumption. The studies on the inactivation mechanisms during the LEEFT are also reviewed. Lastly, the challenges and future research of LEEFT disinfection are discussed.

关键词： Water treatment     Nanotechnology     Pathogen inactivation     Electroporation     Nanowire     Chemical-free    

HTML PDF 收藏

Performance of landfill leachate treatment system with disc-tube reverse osmosis units

WANG Baozhen, LIU Shuo, LIU Yanping, LI Xiujin

《环境科学与工程前沿（英文）》 2008年 第2卷 第1期   页码 24-31 doi: 10.1007/s11783-008-0024-x

摘要： Reverse osmosis system with the disc-tube module (DT-RO) was applied to treat landfill leachate on full scale at the Changshengqiao Sanitary Landfill, Chongqing City, China. In the first six-mouth operation phase, the treatment performance of DT-RO system had been excellent and stable. The removal rate of chemical oxygen demand (COD), total organic carbon (TOC), electrical conductivity (EC), and ammonia nitrogen (NH-N) reached 99.2–99.7%, 99.2%, 99.6%, and over 98%, respectively. The rejection of Ca, Ba, and Mg was over 99.9%, respectively. Suspended solid (SS) was not detected in product water. Effective methods had been adopted to control membrane fouling, of which chemical cleaning is of utmost importance to guarantee the long smooth operation of the DT-RO system. The DT-RO system is cleaned in turns with Cleaner A and Cleaner C. At present, the 1st stage cleaning cycle by Cleaner A and Cleaner C is conducted every 100 and 500 h, respectively, depending on raw the water quality.

关键词： chemical cleaning     product     organic     nitrogen     Effective    

HTML PDF 收藏

难降解石化干法腈纶废水物化-生化耦合处理技术研究

田智勇,涂响,宋永会,辛旺,李法云

《中国工程科学》 2013年 第15卷 第3期   页码 80-87

摘要：

采用物化-生化耦合处理难降解石化干法腈纶废水，开展了以多技术协同O3高级氧化与多格室A/O型膜生物（MBR）反应器为核心工艺的小试与中试试验研究。结果表明，物化-生化技术的合理耦合可显著提高石化干法腈纶废水处理中化学耗氧量（COD）、氨氮和总氮（TN）去除效果；MBR-O3氧化-曝气生物滤池（BAF）集成试验工艺稳定运行工况下，其COD、氨氮和TN去除率分别可以达到90.0 %、95.0 %和80.0 %，出水平均浓度可分别控制在100.0 mg/L、5.0 mg/L和35.0 mg/L以下。另外，由于石化干法腈纶废水水质缺少一定的可生化有机碳源以及丙烯腈低聚物和含氮杂环类有机物的难生物降解性，因此在生物脱氮过程中，有机氮向无机氨氮转化的氨化步骤限制了整体工艺脱除总氮的效果。

关键词： 难降解     干法     腈纶废水     物化     生化     耦合处理    

HTML PDF 收藏

behaviors of a novel papermaking sludge-based flocculant in practical printing and dyeing wastewater treatment

《环境科学与工程前沿（英文）》 2021年 第15卷 第5期 doi: 10.1007/s11783-021-1390-x

摘要：

•PSBF performed better than PAC and PAM in CODCr removals.

关键词： Practical wastewater treatment     Commercial coagulant/flocculant     Secondary coagulation-flocculation process     Chemical oxygen demand     Coagulation-flocculation mechanism    

HTML PDF 收藏

膜技术在化工废水处理中的应用

宋伟杰,杭晓风,万印华

《中国工程科学》 2014年 第16卷 第12期   页码 67-75

摘要：

针对化工生产过程中产生的含有多种可回收成分（多元醇、多元酸、酯类、无机盐）的废水，分别设计和开发了汽提-膜分离-精馏耦合、多级膜浓缩、渗透汽化-精馏等集成工艺。通过膜集成过程与化工生产过程的结合，可以有效地降低废水中的化学需氧量（COD），并实现废水中可回收成分的资源化利用，降低化工废水处理的综合成本，对化工产业的可持续发展具有积极意义。

关键词： 膜集成技术     化工废水     资源化利用     水回用    

HTML PDF 收藏

活性炭深度处理技术的化学安全性及影响因素研究

陈卫,王磊磊,林涛,罗彬

《中国工程科学》 2008年 第10卷 第5期   页码 32-37

摘要：

活性炭技术是净化微污染源水的有效手段，但其化学安全性值得关注。研究发现，活性炭出水中微量有机污染物仍有一定含量，AOC浓度仍达211 μg/L，并可检测到新的有机化合物，去除效果受炭种、源水水质和工艺运行等因素影响；活性炭对消毒副产物的去除效果不稳定，生物活性炭对卤乙酸前质（HAAs）表现出较好去除效果，但对三卤甲烷前质（THMs）的去除效果有限，去除效果与活性炭类型和工艺运行参数等因素有关；活性炭技术可以去除大部分臭氧化副产物的溴酸盐和甲醛，但水厂用纯氧生产臭氧时，活性炭的处理情况有所不同。活性炭易于吸附微囊藻毒素，微生物对藻毒素也有降解作用，仍应注意源水水质情况。另外，活性炭能有效去除致突变活性物质，即使在活性炭吸附TOC饱和后，仍能显著地去除致突变活性物质。

关键词： 饮用水     活性炭     化学安全性     副产物     藻毒素    

HTML PDF 收藏

Water quality prediction of copper-molybdenum mining-beneficiation wastewater based on the PSO-SVR model

《环境科学与工程前沿（英文）》 2023年 第17卷 第8期 doi: 10.1007/s11783-023-1698-9

摘要：

● Data acquisition and pre-processing for wastewater treatment were summarized.

关键词： Chemical oxygen demand     Mining-beneficiation wastewater treatment     Particle swarm optimization     Support vector regression     Artificial neural network    

HTML PDF 收藏

Special issue on “Green chemical process and intensification”

《化学科学与工程前沿（英文）》 2022年 第16卷 第11期   页码 1533-1535 doi: 10.1007/s11705-022-2263-y

HTML PDF 收藏

标题 作者 时间 类型 操作

Using ultrasound to improve the sequential post-synthesis modification method for making mesoporous Y zeolites

Rongxin Zhang, Peinan Zhong, Hamidreza Arandiyan, Yanan Guan, Jinmin Liu, Na Wang, Yilai Jiao, Xiaolei Fan

期刊论文

Dealumination and desilication for Al-rich HZSM-5 zeolite via steam-alkaline treatment and its application

Yuehua Fang, Fan Yang, Xuan He, Xuedong Zhu

期刊论文

Applying chemical sedimentation process in drinking water treatment plant to address the emergent arsenic

Pengfei LIN,Xiaojian ZHANG,Hongwei YANG,Yong LI,Chao CHEN

期刊论文

Increasing significance of advanced physical/chemical processes in the development and application ofsustainable wastewater treatment systems

RULKENS Wim

期刊论文

Alkaline modification of ZSM-5 catalysts for methanol aromatization: The effect of the alkaline concentration

Zhenhao Wei,Tengfei Xia,Minghui Liu,Qingsheng Cao,Yarong Xu,Kake Zhu,Xuedong Zhu

期刊论文

Using loose nanofiltration membrane for lake water treatment: A pilot study

期刊论文

Pesticide wastewater treatment using the combination of the microbial electrolysis desalination and chemical-production

Songwei Lin, Yaobin Lu, Bo Ye, Cuiping Zeng, Guangli Liu, Jieling Li, Haiping Luo, Renduo Zhang

期刊论文

Locally enhanced electric field treatment (LEEFT) for water disinfection

Jianfeng Zhou, Ting Wang, Cecilia Yu, Xing Xie

期刊论文

Performance of landfill leachate treatment system with disc-tube reverse osmosis units

WANG Baozhen, LIU Shuo, LIU Yanping, LI Xiujin

期刊论文

难降解石化干法腈纶废水物化-生化耦合处理技术研究

田智勇,涂响,宋永会,辛旺,李法云

期刊论文

behaviors of a novel papermaking sludge-based flocculant in practical printing and dyeing wastewater treatment

期刊论文

膜技术在化工废水处理中的应用

宋伟杰,杭晓风,万印华

期刊论文

活性炭深度处理技术的化学安全性及影响因素研究

陈卫,王磊磊,林涛,罗彬

期刊论文

Water quality prediction of copper-molybdenum mining-beneficiation wastewater based on the PSO-SVR model

期刊论文

Special issue on “Green chemical process and intensification”

期刊论文