Bioregeneration of granular activated carbon loaded with phenolic compounds: effects of biological and physico-chemical factors     

P.-Y. Chan  P.-E. Lim  S.-L. Ng  C.-E. Seng 《International Journal of Environmental Science and Technology》2018,15(8):1699-1712

Bioregeneration is a process of restoring the adsorptive capacity of the spent adsorbents through microbial action. In this study, the effects of acclimated biomass concentration, biomass acclimation concentration, dosage of granular activated carbon (GAC) and type of GAC on the bioregeneration efficiency (BE) of GAC loaded with phenol and p-nitrophenol (PNP), respectively, were investigated. The quantification was conducted by monitoring the time courses of adsorbed substrate amount during bioregeneration under the sequential adsorption and biodegradation approach. The mean BEs of phenol- and PNP-loaded GAC were found to be 78 ± 2 and 77 ± 1%, respectively. The results revealed that increasing acclimated biomass concentration and adsorbent dosage did not have an observable effect on the BEs of phenol- and PNP-loaded GAC. Additionally, the BEs were found to be almost the same for the bioregeneration of phenol-loaded GAC using biomass acclimated to 350 and 600 mg/L of phenol, respectively. The BEs of phenol-loaded GAC 830 (thermal-activated) and GAC 1240+ (thermal- and acid-activated) did not show any observable difference, but the BE of PNP-loaded GAC 1240+ was found to be greater than that of PNP-loaded GAC 830 indicating that the improvement of BE of spent GAC through further chemical activation was dependent on the type of adsorbate.  相似文献   

Lentic and lotic assemblages of zooplankton in a tropical reservoir,and their association with water quality conditions     

W. O. Wan Maznah  S. Intan  R. Sharifah  C. C. Lim 《International Journal of Environmental Science and Technology》2018,15(3):533-542

Zooplankton assemblages in relation to water quality parameters at lentic and lotic habitats of Air Itam Reservoir, Penang, Malaysia, were analysed. Five sampling stations were designated, including three stations located in the reservoir (Stations A, B, and C) and two stations in the upstream inflow and downstream outflow (Stations D and E, respectively). The most common and dominant zooplankton found in the lake were Polyarthra vulgaris, Ceriodaphnia cornuta, Mesocyclops leuckarti, and Thermocyclops crassus. Water Quality Index, calculated as recommended by the Malaysian Department of Environment, ranged between 88.46 and 93.6, showed that the reservoir was clean. Low numbers of species and value of the Shannon–Wiener Diversity Index were recorded at stations located upstream and downstream of the reservoir. Cluster analysis based on the abundance of zooplankton species distinguished the sampling stations into two groups (lentic and lotic groups, comprised of Stations A, B, and C; and Stations D and E, respectively). This study showed that zooplankton occurrence and abundance were associated with the quality of their environment, and zooplankton community provides information about the reservoir ecosystem, thus reflecting the importance of biomonitoring in lake assessment and management.  相似文献   

A modular graph transformation rule set for IFC‐to‐CityGML conversion     

Helga Tauscher  Joie Lim  Rudi Stouffs 《Transactions in GIS》2021,25(1):261-290

Conversion of Industry Foundation Classes (IFC) building models into CityGML city models is one of the operational scenarios for BIM–GIS integration, with a variety of applications producing and consuming data on either side. Given the in‐depth cross‐domain knowledge required to specify such conversions, the heterogeneity of the IFC input data and the use cases for the resulting CityGML, flexible and configurable solutions are needed that make conversion details accessible to domain specialists. Graph transformation as a conversion method fulfils these requirements. We propose to extend the modularity given by single transformation rules at a more coarse‐grained level and identify four layers with modules of associated rules. We describe a self‐contained set of rules across these modules and demonstrate its application to a range of building models.  相似文献   

The EChO payload instrument – an overview     

Paul Eccleston  Bruce Swinyard  Marcel Tessenyi  Giovanna Tinetti  Ingo Waldmann  Marc Ferlet  Ranah Irshad  Tanya Lim  Kevin Middleton  Tom Bradshaw  Martin Crook  Tom Hunt  Berend Winter  Ian Bryson  Naidu Bezawada  William Taylor  Neil Bowles  Enzo Pascale  Gianluca Morgante  Emanuele Pace  Alberto Adriani  Jean-Michel Reess  Marc Ollivier  Roland Ottensamer  Mirek Rataj  Gonzalo Ramos Zapata  Jan-Rutger Schrader  Avri Selig  Kate Isaak  Martin Linder  Ludovic Puig 《Experimental Astronomy》2015,40(2-3):427-447

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Independent component regression for seasonal climate prediction: an efficient way to improve multimodel ensembles   总被引：1，自引：0，他引：1  

Yaeji Lim  Jaeyong Lee  Hee-Seok Oh  Hyun-Suk Kang 《Theoretical and Applied Climatology》2015,119(3-4):433-441

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Integrated coastal zone management towards Indonesia global ocean observing system (INA-GOOS): Review and recommendation     

A.R. Farhan  S. Lim 《Ocean & Coastal Management》2010,53(8):421-427

Indonesia as an archipelagos country consisting of more than 17,508 islands has a challenging problem in terms of island management and the provisional ocean services to the coastal community. The population growth (especially in coastal areas) followed by declining natural resources caused by overfishing and overexploitation is one of the biggest concerns both for the central and the local governments in Indonesia. Integrated Coastal Zone Management (ICZM) is one of the attempted solutions to overcome these difficulties, however, it is known to be unsatisfactory even after several programs under ICZM have been developed and implemented. Therefore, further facilitation of ICZM programs is necessary in order to benefit to Indonesian governmental management of their islands, coastal areas and oceans. In doing so, ICZM will also make a significant contribution towards the implementation of the Indonesia Global Ocean Observing System (INA-GOOS). This paper aims to review ICZM activities in Indonesia to obtain a better understanding of, and the need for ICZM implementations in support of their policy, sustainability and decision-making process in the direction of INA-GOOS. It is expected that the ICZM implementations will have a high impact on INA-GOOS programs.  相似文献   

The East Atlantic/West Russia (EA/WR) teleconnection in the North Atlantic: climate impact and relation to Rossby wave propagation     

Young-Kwon Lim 《Climate Dynamics》2015,44(11-12):3211-3222

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Shock strengths in clumps impacted by winds of increasing power     

A.J. Lim  T.W. Hartquist  D.A. Williams 《Monthly notices of the Royal Astronomical Society》2001,326(3):1110-1114

We have performed spherically symmetric and axisymetric hydrodynamic simulations of wind–clump interactions in order to determine the conditions under which a wind, impacting upon a clump and increasing in power with time, drives a strong shock into the clump. If the wind ram pressure and the clump thermal pressure are comparable when the impact first occurs, then the wind ram pressure must increase on a time-scale markedly smaller than the sound-crossing time of the clump if it is to drive a shock that becomes strong at any point in the clump. We comment on the possible relevance of this result for the dynamics and chemistry of hot cores in regions of high-mass star formation.  相似文献   

Jet cocoons in rotating Seyfert galaxies: adaptive three-dimensional hydrodynamics     

Andrew J. Lim  Wolfgang Steffen 《Monthly notices of the Royal Astronomical Society》2001,322(1):166-176

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Effects of asteroid and comet impacts on habitats for lithophytic organisms—A synthesis     

Charles S. Cockell  Pascal Lee  Paul Broady  Darlene S. S. Lim  Gordon R. Osinski  John Parnell  Christian Koeberl  Lauri Pesonen  Johanna Salminen 《Meteoritics & planetary science》2005,40(12):1901-1914

Abstract— Asteroid and comet impacts can have a profound influence on the habitats available for lithophytic microorganisms. Using evidence from the Haughton impact structure, Nunavut, Canadian High Arctic, we describe the role of impacts in influencing the nature of the lithophytic ecological niche. Impact‐induced increases in rock porosity and fracturing can result in the formation of cryptoendolithic habitats. In some cases and depending upon the target material, an increase in rock translucence can yield new habitats for photosynthetic cryptoendoliths. Chasmoendolithic habitats are associated with cracks and cavities connected to the surface of the rock and are commonly increased in abundance as a result of impact bulking. Chasmoendolithic habitats require less specific geological conditions than are required for cryptoendolithic habitats, and their formation is likely to be common to most impact events. Impact events are unlikely to have an influence on epilithic and hypolithic habitats except in rare cases, where, for example, the formation of impact glasses might yield new hypolithic habitats. We present a synthetic understanding of the influence of asteroid and comet impacts on the availability and characteristics of rocky habitats for microorganisms.  相似文献