资源类型

期刊论文 146

会议视频 2

年份

2023 18

2022 15

2021 22

2020 13

2019 7

2018 13

2017 7

2016 9

2015 3

2014 2

2013 3

2012 4

2011 1

2010 4

2009 7

2008 4

2007 12

2006 1

展开 ︾

关键词

光催化 2

185 nmUV 1

1T/2H-MoS2 1

2022全球工程前沿 1

CDMA 1

LED,颜色漂移,光通量衰减,流明衰减 1

MOF基催化剂 1

PET酶 1

PET降解 1

ZIF-8 1

pH值 1

二氧化钛 1

二苯甲酮 1

互养菌(Syntrophus 1

互营杆菌(Syntrophorhabdaceae) 1

亲/疏水界面修饰 1

全程氨氧化细菌 1

分层空时码 1

分解水 1

展开 ︾

检索范围:

排序: 展示方式:

Comparison of different algicides on growth of

Naiyu Wang, Kai Wang, Can Wang

《环境科学与工程前沿(英文)》 2017年 第11卷 第6期 doi: 10.1007/s11783-017-0940-8

摘要: Eutrophication with a large number of commonly occurs worldwide, thereby threatening the aquatic ecosystem and human health. In this study, four kinds of algicides were tested to explore their influence on cell density and chlorophyll-a of . Results showed that aluminum silicate agent, which inhibited more than 90% cell growth compared with the control group, demonstrated the strongest inhibition effect immediately on growth. Furthermore, the production and release of microcystin (MC)-LR were investigated. Aluminum silicate, CuSO , and Emma-11 were more effective than pyrogallic acid in disrupting the cells of , thereby increasing the extracellular MC-LR concentration. Aluminum silicate caused the highest extracellular MC-LR concentration of more than 45 mg·L . Biotoxicity was also detected to evaluate the environmental risks of MC-LR release, which were related to the usages of different algicides. Extracellular MC-LR concentration mostly increased when the biotoxicity of algae solution increased. The experiments were also designed to reveal the effects of physical conditions in riverways, such as natural sunlight, aeration and benthal sludge, on MC-LR degradation. These findings indicated that UV rays in sunlight, which can achieve a MC-LR removal efficiency of more than 15%, played an important role in MC-LR degradation. Among all the physical pathways of MC-LR removal, benthal sludge adsorption presented the optimal efficiency at 20%.

关键词: Microcystis aeruginosa     MC-LR release     Algicides     MC-LR degradation     Biotoxicity    

Microcystin-LR biodegradation by

Chengbin XIAO, Hai YAN, Junfeng WANG, Wei WEI, Jun NING, Gang PAN

《环境科学与工程前沿(英文)》 2011年 第5卷 第4期   页码 526-532 doi: 10.1007/s11783-010-0261-7

摘要: A promising bacterial strain for biodegrading microcystin-LR (MC-LR) as the sole carbon and nitrogen source was successfully isolated from Lake Dianchi, China. The strain was identified as sp. USTB-05, which was the first isolated MCs-biodegrading sp. in China. The average biodegradation rate of MC-LR by sp. USTB-05 was 28.8 mg·L per day, which was apparently higher than those of other bacteria reported so far. The optimal temperature and pH for both strain USTB-05 growth and MC-LR biodegradation were 30°C and 7.0, respectively. The release of MC-LR from the cyanobacterial cells collected from Lake Guishui and the biodegradation of MC-LR by both strain and cell-free extract (CE) were investigated. The results indicated that MC-LR with the initial concentration of 4.0 mg·L in water was biodegraded by sp. USTB-05 within 4 d, while MC-LR with the initial concentration of 28.8 mg·L could be completely removed in 3 h by CE of sp. USTB-05 containing 350 mg·L protein. During enzymatic biodegradation of MC-LR, two intermediate metabolites and a dead-end product were observed on an HPLC chromatogram. Moreover, the similar scanning profiles of MC-LR and its metabolic products indicate that the Adda side-chain of MC-LR was kept intact in all products.

关键词: microcystin-LR(MC-LR)     biodegradation     Sphingopyxis sp     USTB-05     cell-free extract    

Oxidation and biotoxicity assessment of microcystin-LR using different AOPs based on UV, O

Siyi Lu, Naiyu Wang, Can Wang

《环境科学与工程前沿(英文)》 2018年 第12卷 第3期 doi: 10.1007/s11783-018-1030-2

摘要: Microcystin-LR attracts attention due to its high toxicity, high concentration and high frequency. The removal characteristics of UV/H O and O /H O advanced oxidation processes and their individual process for MC-LR were investigated and compared in this study. Both the removal efficiencies and rates of MC-LR as well as the biotoxicity of degradation products was analyzed. Results showed that the UV/H O process and O /H O were effective methods to remove MC-LR from water, and they two performed better than UV-, O -, H O -alone processes under the same conditions. The effects of UV intensity, H O concentration and O concentration on the removal performance were explored. The synergistic effects between UV and H O , O and H O were observed. UV dosage of 1800 mJ·cm was required to remove 90% of 100 g·L MC-LR, which amount significantly decreased to 500 mJ·cm when 1.7 mg·L H O was added. 0.25 mg·L O , or 0.125 mg·L O with 1.7 mg·L H O was needed to reach 90% removal efficiency. Furthermore, the biotoxicity results about these UV/H O , O /H O and O -alone processes all present rising trends with oxidation degree of MC-LR. Biotoxicity of solution, equivalent to 0.01 mg·L Zn , raised to 0.05 mg·L Zn after UV/H O or O /H O reaction. This phenomenon may be attributed to the aldehydes and ketones with small molecular weight generated during reaction. Advice about the selection of MC-LR removal methods in real cases was provided.

关键词: Microcystin-LR     Advanced oxidation processes (AOPs)     Biotoxicity     Synergistic effects    

基于简化LSCMA算法的STBC MC-CDMA系统盲多用户检测

熊亦兰,酆广增

《中国工程科学》 2007年 第9卷 第5期   页码 42-45

摘要:

在空时分组编码(STBC)的MC-CDMA系统中,根据STBC正交编码的特点,提出了一种简单可行 的基于常模(CM)准则的盲多用户检测算法

关键词: 盲多用户检测     简化LSCMA算法     空时编码MC-CDMA    

Microcystin-LR detection based on indirect competitive enzyme-linked immunosorbent assay

SHENG Jianwu, HE Miao, YU Shaoqing, SHI Hanchang, QIAN Yi

《环境科学与工程前沿(英文)》 2007年 第1卷 第3期   页码 329-333 doi: 10.1007/s11783-007-0056-7

摘要: Microcystins (MCs) are a group of closely related toxic cyclic heptapeptides produced by common cyanobacteria, which cause lots of accidents and threatens human health. In this paper, an indirect competitive enzyme-linked immunosorbent assay (ic-ELISA) was established and used to detect microcystin-LR (MC-LR) in drinking and surface waters. The concentration of coating antigen was 5 ?g/mL, the dilution of monoclonal antibody MC10E7 was 1:3 000, the dilution of enzyme tracer (goat anti-mouse IgG-peroxidase) was 1:3 000, the standard concentration of MC-LR ranged from 0.001 μg/L to 30 μg/L, and o-phenylenediamine was used as substrate. The assay showed high relativity with high performance liquid chromatography (HPLC) with a correlation coefficient of more than 99%. The relative standard deviation was less than 10%, the detection limit was achieved down to 0.01 μg/L and up to 5.1 μg/L. The quantitative detection range was from 0.03 μg/L to 3 μg/L, and the antibody had high specificity for [4-arginine] microcystins. It performed well in spite of the influence of the real samples.

关键词: o-phenylenediamine     4-arginine     ic-ELISA     substrate     chromatography    

工程网络计划的LR型模糊系数线性规划方法

高朋,冯俊文

《中国工程科学》 2009年 第11卷 第2期   页码 70-74

摘要: 文章提出一种具有LR型模糊数的线性规划模型,解决了工程网络计划的时间参数 估计和关键路径识别问题,并通过引入λ截集来充分描述决策者在不同情形下对工序工期估计的可信程度。

关键词: 工程网络计划     模糊线性规划     工序    

智能天线MC-CDMA系统中空频联合盲多用户检测算法

傅洪亮,酆广增

《中国工程科学》 2006年 第8卷 第2期   页码 34-38

摘要:

提出了智能天线多载波CDMA系统中一种空域和频域联合的盲多用户自适应检测算法,它是将空域波束形成和频域合并检测合二为一,使得检测器在空域和频域两维上同时优化,从而提高了系统的检测性能。对这种空频联合检测算法的误码性能进行了分析,并与先自适应波束形成然后再进行频域合并的分步算法进行了仿真比较,仿真结果表明,提出的空频联合盲多用户自适应检测算法的检测性能优于分步检测算法。

关键词: 智能天线     多载波     CDMA     联合检测    

Influence of construction-induced damage on the degradation of freeze–thawed lightweight cellular concrete

《结构与土木工程前沿(英文)》 2021年 第15卷 第3期   页码 781-792 doi: 10.1007/s11709-021-0733-9

摘要: During the construction of lightweight cellular concrete (LCC), material damage frequently occurs, causing the degradation and deterioration of the mechanical performance, durability, and subgrade quality of LCC. The construction-induced damage can be more significant than those from the service environment of LCC, such as freeze–thaw (F–T) action in cold regions. However, the effect of construction-induced damage on LCC during F–T cycles is often ignored and the deterioration mechanisms are not yet clarified. In this study, we investigated the factors causing damage during construction using a sample preparation method established to simulate the damage in the laboratory setting. We conducted F–T cycle tests and microstructural characterization to study the effect of microstructural damage on the overall strength of LCC with different water contents under F–T actions. We established the relationship between the pore-area ratio and F–T cycle times, pore-area ratio, and strength, as well as the F–T cycle times and strength under different damage forms. The damage evolution is provided with the rationality of the damage equation, verified by comparing the measured and predicted damage variables. This study would serve as a guide for the construction and performance of LCC in cold regions.

关键词: lightweight cellular concrete     construction-induced damage     freeze-thaw action     microstructure     degradation mechanism    

Efficient degradation of orange II by ZnMn

Qingzhuo Ni, Hao Cheng, Jianfeng Ma, Yong Kong, Sridhar Komarneni

《化学科学与工程前沿(英文)》 2020年 第14卷 第6期   页码 956-966 doi: 10.1007/s11705-019-1907-z

摘要: A ZnMn O catalyst has been synthesized via a sucrose-aided combustion method and characterized by various analytical techniques. It is composed of numerous nanoparticles (15–110 nm) assembled into a porous structure with a specific surface area (SSA) of 19.1 m ·g . Its catalytic activity has been investigated for the degradation of orange II dye using three different systems, i.e., the photocatalysis system with visible light, the chemocatalysis system with bisulfite, and the photo-chemical catalysis system with both visible light and bisulfite. The last system exhibits the maximum degradation efficiency of 90%, much higher than the photocatalysis system (15%) and the chemocatalysis system (67%). The recycling experiments indicate that the ZnMn O catalyst has high stability and reusability and is thus a green and eximious catalyst. Furthermore, the potential degradation mechanisms applicable to the three systems are discussed with relevant theoretical analysis and scavenging experiments for radicals. The active species such as Mn(III), O , h , e , SO and HO are proposed to be responsible for the excellent degradation results in the photo-chemical catalysis system with the ZnMn O catalyst.

关键词: ZnMn2O4     photo-chemical catalysis     bisulfite     dye degradation    

Promotive effect of pyridine on indole degradation by activated sludge under anoxic conditions

LI Yongmei, GU Guowei, LI Wenshu

《环境科学与工程前沿(英文)》 2007年 第1卷 第4期   页码 493-497 doi: 10.1007/s11783-007-0079-0

摘要: Batch experiments were carried out to investigate the promotive effect of pyridine on indole degradation under denitrifying conditions. The seed sludge was obtained from a local coal-coking wastewater treatment facility and was acc

关键词: wastewater treatment     coal-coking wastewater     promotive     degradation    

anchored alginate/poly(acrylic acid/acrylamide) double-network hydrogel composites for efficient catalytic degradation

《化学科学与工程前沿(英文)》 2023年 第17卷 第7期   页码 893-905 doi: 10.1007/s11705-022-2290-8

摘要: A novel alginate/poly(acrylic acid/acrylamide) double-network hydrogel composite with silver nanoparticles was successfully fabricated using the sol–gel method. The presence of carboxyl and amide groups in the network structure provided abundant active sites for complexing silver ions, facilitating the in situ reduction and confinement of silver nanoparticles. In batch experiments, the optimal silver loading was 20%, and 5 mmol·L–1 of p-nitrophenol was completely degraded in 113 s with a rate constant value of 4.057 × 10−2 s–1. In the tap water system and simulated seawater system, the degradation time of p-nitrophenol at the same concentration was 261 and 276 s, respectively, with a conversion rate above 99%. In the fixed-bed experiment, the conversion rate remained above 74% after 3 h at a flowing rate of 7 mL·min–1. After 8 cycling tests, the conversion rate remained at 98.7%. Moreover, the catalyst exhibited outstanding performance in the degradation experiment of four typical organic dyes.

关键词: double-network hydrogel     dye degradation     silver nanoparticles     alginate    

Sustainable wood-based nanotechnologies for photocatalytic degradation of organic contaminants in aquatic

《环境科学与工程前沿(英文)》 2021年 第15卷 第4期 doi: 10.1007/s11783-020-1346-6

摘要:

•Wood and its reassemblies are ideal substrates to develop novel photocatalysts.

关键词: Wood     Nanocatalysts     Photodegradation     Organic contaminants     Composites    

Thermal degradation kinetics and lifetime estimation for polycarbonate/polymethylphenylsilsesquioxane

Jiangbo WANG, Zhong XIN

《化学科学与工程前沿(英文)》 2009年 第3卷 第2期   页码 167-171 doi: 10.1007/s11705-009-0006-y

摘要: The thermal degradation behaviors of polycarbonate/polymethylphenylsilsesquioxane (FRPC) composites were investigated by thermogravimetric analysis (TGA) under isothermal conditions in nitrogen atmosphere. The isothermal kinetics equation was used to describe the thermal degradation process. The results showed that activation energy ( ), in the case of isothermal degradation, was a quick increasing function of conversion (α) for polycarbonate (PC) but was a strong and decreasing function of conversion for FRPC. Under the isothermal condition, the addition of polymethylphenylsilsesquioxane (PMPSQ) retardanted the thermal degradation and enhanced the thermal stability of PC during the early and middle stages of thermal degradation. It also indicated a possible existence of a difference in nucleation, nuclei growth, and gas diffusion mechanism in the thermal degradation process between PC and FRPC. Meanwhile, the addition of PMPSQ influenced the lifetime of PC, but the composite still met the demand in manufacturing and application.

关键词: polycarbonate     polymethylphenylsilsesquioxane     thermal degradation kinetics     activation energy     lifetime    

bismuth oxyiodide with highly exposed (110) facets on curved carbon nitride for the photocatalytic degradation

《化学科学与工程前沿(英文)》 2022年 第16卷 第7期   页码 1125-1138 doi: 10.1007/s11705-021-2116-0

摘要: Crystalline materials with specific facet atomic arrangements and crystal facet structures exhibit unique functions according to their facet effects, quantum size effects and physical and chemical properties. In this study, a novel high-exposure (110) facet of bismuth oxyiodide (BiOI) was prepared (denoted as BiOI-110), and designed as nanosheets rich in oxygen vacancies by crystal facet design and regulation. Graphitic carbon nitride was designed as curved carbon nitride with dibromopyrazine, denoted as DCN, which contributed to a significant structural distortion in plane symmetry and improved the separation of charge carriers. Novel heterostructured BiOI-110/DCN nanosheets with a high-exposure (110) facet and abundant oxygen vacancies were successfully designed to enhance the photocatalytic degradation of organic pollutants. It was demonstrated that complete and tight contact between BiOI-110 and DCN was achieved by changing the size and crystal facet of BiOI. Oxytetracycline (OTC) and methyl blue dyes were used as targets for pollutant degradation, and 85.6% and 96.5% photocatalytic degradation efficiencies, respectively, were observed in the optimal proportion of 7% BiOI-110/DCN. The experimental results and electron spin resonance analysis showed that •O2 and h+ played a major role in the process of pollutant degradation. Additionally, high-resolution liquid chromatography-mass spectrography was used to identify the reaction intermediates of OTC, and the possible degradation pathway of this pollutant was proposed. Finally, the excellent reusability of BiOI-110/DCN nanomaterials was confirmed, providing a new approach for the removal of antibiotics that are difficult to biodegrade. Overall, crystal facet design has been proven to have broad prospects in improving the water environment.

关键词: high-exposure (110) facet     oxygen vacancy-rich     BiOI-110/DCN heterojunction     photocatalytic degradation     visible-light-response    

UV-LED/P25-based photocatalysis for effective degradation of isothiazolone biocide

《环境科学与工程前沿(英文)》 2021年 第15卷 第5期 doi: 10.1007/s11783-020-1379-x

摘要:

• UV-LED with shorter wavelength was beneficial for photocatalytic degradation.

关键词: Degradation     Photocatalytic     LED     CMIT     P25    

标题 作者 时间 类型 操作

Comparison of different algicides on growth of

Naiyu Wang, Kai Wang, Can Wang

期刊论文

Microcystin-LR biodegradation by

Chengbin XIAO, Hai YAN, Junfeng WANG, Wei WEI, Jun NING, Gang PAN

期刊论文

Oxidation and biotoxicity assessment of microcystin-LR using different AOPs based on UV, O

Siyi Lu, Naiyu Wang, Can Wang

期刊论文

基于简化LSCMA算法的STBC MC-CDMA系统盲多用户检测

熊亦兰,酆广增

期刊论文

Microcystin-LR detection based on indirect competitive enzyme-linked immunosorbent assay

SHENG Jianwu, HE Miao, YU Shaoqing, SHI Hanchang, QIAN Yi

期刊论文

工程网络计划的LR型模糊系数线性规划方法

高朋,冯俊文

期刊论文

智能天线MC-CDMA系统中空频联合盲多用户检测算法

傅洪亮,酆广增

期刊论文

Influence of construction-induced damage on the degradation of freeze–thawed lightweight cellular concrete

期刊论文

Efficient degradation of orange II by ZnMn

Qingzhuo Ni, Hao Cheng, Jianfeng Ma, Yong Kong, Sridhar Komarneni

期刊论文

Promotive effect of pyridine on indole degradation by activated sludge under anoxic conditions

LI Yongmei, GU Guowei, LI Wenshu

期刊论文

anchored alginate/poly(acrylic acid/acrylamide) double-network hydrogel composites for efficient catalytic degradation

期刊论文

Sustainable wood-based nanotechnologies for photocatalytic degradation of organic contaminants in aquatic

期刊论文

Thermal degradation kinetics and lifetime estimation for polycarbonate/polymethylphenylsilsesquioxane

Jiangbo WANG, Zhong XIN

期刊论文

bismuth oxyiodide with highly exposed (110) facets on curved carbon nitride for the photocatalytic degradation

期刊论文

UV-LED/P25-based photocatalysis for effective degradation of isothiazolone biocide

期刊论文