|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | On the Variability and Correlation of Surface Ozone and Carbon Monoxide Observed in Hong Kong Using Trajectory and Regression Analyses显示文摘This paper investigates,the variability and correlation of surface ozone (03) and carbon monoxide (CO) observed at Cape D'Aguilar in Hong Kong from I January 1994 to 31 December 1995.Statistical analysis shows that the average 03 and CO mixing ratios during the two years are 32:k17 ppbv and 305:k191ppbv,respectively.The O3/CO ratio ranges from 0.05 to 0.6 ppbv/ppbv with its frequency peaking at 0.15.The raw dataset is divided into six groups using backward trajectory and cluster analyses.For data assigned to the same trajectory type,three groups are further sorted out based on CO and NOx mixing ratios.The correlation coefficients and slopes of O3/CO for the 18 groups are calculated using linear regression analysis.Final]y,five kinds of air masses with different chemical features are identified:continental background (CB),marine background (MB),regional polluted continental (RPC),perturbed marine (P'M),and local polluted (LP) air masses.Further studies indicate that 03 and CO in the continental and marine background air masses (CB and MB) are positively correlated for the reason that they are well mixed over the long range transport before arriving at the site.The negative correlation between 03 and CO in air mass LP is believed to be associated with heavy anthropogenic influence,which results from the enhancement by local sources as indicated by high CO and NOx and depletion of 03 when mixed with fresh emissions.The positive correlation in the perturbed marine air mass P*M favors the low photochemical production of 03.The negative,correlation found in the regional polluted continental air mass RPC is different from the observations at Oki Island in Japan due to the more complex 03 chemistry at Cape D'Aguilar. | 王体健 K.S.LAM C.W.TSANG S.C.KOT | 2004 | Advances in Atmospheric Sciences2004，21，1： | 5 |
| 2 | Efects of solution chemistry on arsenic(V) removal by low-cost adsorbents显示文摘Natural and anthropogenic arsenic(As)contamination of water sources pose serious health concerns,especially for small communities in rural areas.This study assessed the applicability of three industrial byproducts(coal fly ash,lignite,and green waste compost)as the low-cost adsorbents for As(V)removal under various field-relevant conditions(dissolved oxygen,As(V)/Fe ratio,solution pH,and presence of competing species).The physico-chemical properties of the adsorbents were characterized by XRD,XRF,FT-IR,and NMR analysis.Batch experiments demonstrated that coal fly ash could provide efective As(V)removal(82.1%–95%)because it contained high content of amorphous iron/aluminium hydroxides for As(V)adsorption and dissolvable calcium minerals for calcium arsenate precipitation.However,the addition of lignite and green waste compost was found unfavourable since they hindered the As(V)removal by 10%–42%possibly due to dissolution of organic matter and ternary arsenate-iron-organic matter complexes.On the other hand,higher concentrations of dissolved iron(comparing As(V)/Fe ratios of 1:1 and 1:10)and dissolved oxygen(comparing 0.2 and 6 mg/L)only marginally enhanced the As(V)removal at pH 6 and 8.Thus,addition of dissolved iron,water aeration,or pH adjustment became unnecessary because coal fly ash was able to provide efective As(V)removal under the natural range of geochemical conditions.Moreover,the presence of low levels of background competing(0.8 or 8 mg/L of humic acid,phosphate,and silicate)imposed little influence on As(V)removal,possibly because the high adsorption capacity of coal fly ash was far from exhaustion.These results suggested that coal fly ash was a potentially promising adsorbent that warranted further investigation. | Yuru Wang Daniel C.W.Tsang | 2013 | Journal of Environmental Sciences2013，25，11： | 4 |
| 3 | Chemical characteristics of aerosols at coastal station in Hong Kong.Ⅱ. Environmental behavior of trace elements during the April 1995 to April 1996显示文摘An one-year of sampling aerosol program was carried out during the period of April 1995 to April 1996 at coastal region, Cape D′Aguilar, in Hong Kong. The trace element composition of aerosol particles(TSP and PM 10 ) were measured and analyzed by using the Instrumental Neutron Activation Analysis(INAA) and Inductive Couple Plasma-Mass Spectrometry(ICP-MS) techniques. The results showed that the polluted elements such as: V, Zn, As, Pb, Cd, Sb, I, Se, Bi, with high enrichment factor(E.F) values, are derived from anthropogenic sources, while Sc, Al, Fe, Mn, Sm, La, Sr are less than 10 in E.F, these elements are related the crust and soil. The concentration of the trace elements are present seasonal variation i.e. summer low and winter high, whereas the V or noncrustal V(V *) present summer high and winter low, this phenomenon might be explained by local or regional oil combustion sources. Use three type of elemental ratio, e.g. La/Sm, Mn */V * and Bi/Al indicate that both TSP and PM 10 of La/Sm ratios are mainly related to soil and dust, Mn */V * are probably represent fossil combustion and Bi/Al are possibly associated with refuse incineration, ferromanganese alloys and aluminum production. The varimax rotation factor analysis for trace elements was performed. By means of the absolute principal component analysis(APCA) and multiple regression, the contribution of trace elements to possible sources and overall means of trace elements were estimated. The results showed that the present station is impacted by the anthropogenic species, although the quantities are different during the summertime and wintertime. | K.S.Lam Z.L.Cheng S.C.Kot C.W.Tsang | 2004 | Journal of Environmental Sciences2004，16，2： | 3 |
| 4 | Catalytically active interfaces in titania nanorod-supported copper catalysts for CO oxidation显示文摘One-dimensional titanium dioxide nanorod(TNR)-supported Cu catalysts(2.5 wt.%-12.5 wt.%)were synthesized using deposition-precipitation.X-ray photoelectron spectroscopy,temperature programmed reduction and CO chemisorption measurements showed that Cu doping over TNR offered metal-support interactions and interfacial active sites that had a profound impact on the catalytic performance.The role of the Cu-TNR interface was investigated by comparing the catalytic activity of Cu-TNR catalysts with that of pure CuO nanoparticles in CO oxidation.The presence of highly dispersed copper species,a high number of interfacial active sites,CO adsorption capacity and surface/lattice oxygen were found to be responsible for the excellent activity of 7.5CU-TNR(ie,Cu loading of 7.5 wt.%on TNR).Moreover,the Cu-TNR catalysts followed the Langmuir-Hinshelwood reaction mechanism with 7.5CU-TNR,exhibiting an apparent activation energy of 44.7 kJ/mol.The TNR-supported Cu catalyst gave the highest interfacial catalytic activity in medium-temperature CO oxidation(120-240℃)compared to other commonly used supports,including titanium dioxide nanoparticles(TiO2-P25),silica(SiO2)and alumina(Al20g)in which copper species were nonhomogeneously dispersed.This study confirms that medium-temperature CO oxidation is highly sensitive to the morphology and structure of the supporting material. | Wasim U.Khan Season S.Chen Daniel C.W.Tsang Wey Yang Teoh Xijun Hu Frank L.Y.Lam Alex C.K.Yip | 2020 | Nano Research2020，13，2： | 2 |
| 5 | Wood waste biochar promoted anaerobic digestion of food waste:focusing on the characteristics of biochar and microbial community analysis显示文摘Anaerobic digestion(AD)has been considered as a promising technique for food waste(FW)recycling.However,the accumulation of volatile fatty acids(VFAs)restricts the stability of anaerobic reactors.The present study investigated the use of biochar produced at different conditions(750℃-30 min,750℃-60 min,750℃-120 min,550℃-60 min,650℃-60 min,850℃-60 min,950℃-60 min)for enhancing the AD of FW.Batch experiments showed that all the biochar increased the methane production rates and biochar obtained at 750℃-60 min resulted in the highest enhance-ment by 21.5%.It was further showed surface oxygen-containing functional groups and graphitization degree of biochar were the critical factors for improving methane production.Microbial analysis showed that biochar addi-tion formed different microbial communities,and Methanosaeta,Romboutsia,and norank_f_Anaerolineaceae were enriched,which might be correlated with direct interspecies electron transfer(DIET).This research showed biochar could enhance the AD of FW and also revealed the main characteristics of biochar relating with the enhancement of AD. | Chao Zhang Rui Yang Meichen Sun Shicheng Zhang Mingjing He Daniel C.W.Tsang Gang Luo | 2022 | Biochar2022，4，1： | 2 |
| 6 | Engineering and microstructure properties of contaminated marine sediments solidified by high content of incinerated sewage sludge ash显示文摘Management of incinerated sewage sludge ash(ISSA)and dredged contaminated marine sediments(CMSs)is a great challenge for Hong Kong and other coastal cities due to limited landfilling capacity.The present study investigates the use of high content(20%of sediment by mass)of ISSA in combination with cement/lime for solidification/stabilization(S/S)treatment of CMSs to provide a way to reuse the wastes as construction materials.The results showed that ISSA being a porous material was able to absorb a large amount of water rendering a more efficient solidification process of the marine sediment which normally had a very high water content(w80%).The S/S treatment improved the engineering properties of the sediment,but reduced the workability,especially for the lime-treated samples.Lime can be used to replace ordinary Portland cement(OPC)for better heavy metal immobilization and carbon emission reduction.The hardened sediment samples prepared with 10%of lime and 20%of ISSA could attain a strength of 1.6 MPa after 28 d of curing.In addition,leaching tests confirmed that there was no environmental risk induced by these stabilized materials.The formation of hydrated cementitious compounds including calcium silicate hydrate(CeSeH)/calcium aluminate silicate hydrate(C-A-S-H)/hydrocalumite/calcite was mainly responsible for the strength development in the ISSA/lime-treated sediments. | Jiang-Shan Li Yifan Zhou Xin Chen Qiming Wang Qiang Xue Daniel C.W.Tsang Chi Sun Poon | 2021 | Journal of Rock Mechanics and Geotechnical Engineering2021，13，3： | 1 |
| 7 | 胶乳凝集试验检测日本血吸虫病抗体的实验观察显示文摘 | 裘丽妹 薛海筹 张永红 朱震霞 陶义训 吕绳凯 郭骏 Victor C.W.Tsang Kathy Hancook | 1986 | 寄生虫学与寄生虫病杂志1986，，03： | 1 |
| 8 | 胶乳凝集试验检测日本血吸虫病抗体的实验观察显示文摘 | 裘丽妹 薛海筹 张永红 朱震霞 陶义训 吕绳凯 郭骏 Victor C.W.Tsang Kathy Hancook | 1986 | 寄生虫学与寄生虫病杂志1986，，03： | 1 |
| 9 | 胶乳凝集试验检测日本血吸虫病抗体的实验观察显示文摘 | 裘丽妹 薛海筹 张永红 朱震霞 陶义训 吕绳凯 郭骏 Victor C.W.Tsang Kathy Hancook | 1986 | 寄生虫学与寄生虫病杂志1986，，03： | 1 |
| 10 | 胶乳凝集试验检测日本血吸虫病抗体的实验观察显示文摘 | 裘丽妹 薛海筹 张永红 朱震霞 陶义训 吕绳凯 郭骏 Victor C.W.Tsang Kathy Hancook | 1986 | 寄生虫学与寄生虫病杂志1986，，03： | 1 |
| 11 | Biochar as construction materials for achieving carbon neutrality显示文摘Biochar is a waste-derived material that can sequester carbon at a large scale.The development of low-carbon and sustainable biochar-enhanced construction materials has attracted extensive interest.Biochar,having a porous nature and highly functionalised surface,can provide nucleation sites for chemical reactions and exhibit compatibility with cement,asphalt,and polymer materials.This study critically reviewed the state-of-the-art biochar-enhanced construction materials,including biochar-cement composites,biochar-asphalt composites,biochar-plastic composites,etc.The efficacies and mechanisms of biochar as construction materials were articulated to improve their functional properties.This critical review highlighted the roles of biochar in cement hydration,surface functional groups of engineered biochar for promoting chemical reactions,and value-added merits of biochar-enhanced construction materials(such as humidity regulation,thermal insulation,noise reduction,air/water purification,electromagnetic shielding,and self-sensing).The major properties of biochar are correlated to the features and functionalities of biochar-enhanced construction materials.Further advances in our understanding of biochar’s roles in various composites can foster the next-generation design of carbon-neutral construction materials. | Yuying Zhang Mingjing He Lei Wang Jianhua Yan Bin Ma Xiaohong Zhu Yong Sik Ok Viktor Mechtcherine Daniel C.W.Tsang | 2022 | Biochar2022，4，1： | 0 |
| 12 | Carbon-negative cement-bonded biochar particleboards显示文摘Biochar from bio-waste pyrolysis presents excellent CO_(2) sequestration capacity.This study innovated the design of cement-bonded particleboards utilizing a substantial amount of 50-70 wt.%pre-soaked biochar to render the products carbon-negative.We investigated the roles of biochar in magnesium oxysulfate cement(MOSC)system and demonstrated good mechanical and functional properties of biochar cement particleboards.In the presence of biochar,the amounts of hydration products were enriched in the cement systems as illustrated by the thermogravi-metric analyses(TGA)and X-ray diffraction(XRD).We further incorporated supplementary cementitious materials(SCMs)and generated 5 Mg(OH)_(2)⋅MgSO_(4)·7H_(2)O(5-1-7)phase in the MOSC system.As a result,our designs of biochar particleboards satisfied the standard requirements for flexural strength(>5.5 MPa)and thickness swelling(<2%).Moreover,our biochar particleboards presented a low thermal conductivity as the biochar pores disrupted thermal bridging within particleboards.We illustrated that the high dosage ratio of biochar could significantly offset the CO_(2) emissions of the particleboards(i.e.,carbon-negative)via life cycle assessment.Noticeable economic profits could also be accomplished for the biochar particleboards.For instance,the 50BC-MOSC bonded particleboard(with 50 wt.%pre-soaked biochar as aggregate,50 wt.%MOSC as binder)with promising mechanical properties could store 137 kg CO_(2) tonne^(−1) and yield an overall economic profit of 92 to 116 USD m^(−3) depending on the carbon prices in different countries.In summary,our new designs of carbon-negative biochar particleboards could curtail carbon emissions in the construction materials and promote the realization of carbon neutrality and circular economy. | Liang Chen Yuying Zhang Claudia Labianca Lei Wang Shaoqin Ruan Chi Sun Poon Yong Sik Ok Daniel C.W.Tsang | 2022 | Biochar2022，4，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员