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In press

 

Note to users: Articles in Press are peer reviewed, accepted articles to be published in this journal. When the final article is assigned to volumes/issues of the publication, the Article in Press version will be removed and the final version will appear in the associated published volumes/issues of the publication. The date an article was first made available online will be carried over. Please be aware that, although Articles in Press do not have all bibliographic details available yet, they can already be cited using the year of online publication, as follows: author(s), article title, Journal (year).

 

 

 

Integrated Approach as Sustainable Environmental Technique for Managing Construction Waste: A Review

Elamaran Manoharan, Norazli Othman, Roslina Mohammad, Shreeshivadasan Chelliapan and Siti Uzairiah Mohd Tobi

Volume 8  |  Issue 2 |  Pages: 560-566 | PDF | HTML 

 

Abstract: The construction industry was reported as a major consumer of natural resources worldwide. Almost 60% of natural resources consumed by this industry have caused a lot of environmental impacts to humans and the environment. Among the impacts were disruption of human water sources, changes in biological ecosystem and disruption of food supply chain among biological factors. Countries around the world have enforced several laws and regulations. Apart from that, waste management technologies were formulated by government agencies and the world’s researchers were among initiatives to minimise the waste generation rate. Several technologies, such as recycling and recovery technologies were highlighted to be very efficient in minimising the waste accumulation rate. This paper discussed an integrated concept for managing construction waste in a sustainable manner. The integrated approach has adopted the reuse method, central sorting facilities, recycling facilities, thermal treatment facilities and disposal facilities. Implementation of these integrated approaches was able to save the world’s raw materials and natural energy source as well as reducing the impacts of pollution to the environment.

 

Keywords: Waste management facilities, Pollution, Sustainable

 

 

 

Treatment of Landfill Leachate using Granular Multi-Stage Anaerobic Reactor: Optimisation through Response Surface Methodology

Aida Batrisyia Jasni, Shreeshivadasan Chelliapan, Mohd Fadhil Md Din and Nithiya Arumugam

Volume 8  |  Issue 2 |  Pages: 567-572 | PDF | HTML 

 

Abstract: One of the most hazardous sources of pollution these days is landfill leachate. This harmful wastewater is not only affecting the environment, but also the health of beings surrounding the landfills. Numerous treatments have been used to treat this recalcitrant wastewater; however, anaerobic treatment has been in focus in recent years. In this study, we investigated the interactive effects of chemical oxygen demand (COD), leachate percentage and pH on the performance of a granular multi-stage anaerobic reactor (GMSAR) treating landfill leachate. Response surface methodology (RSM) was utilised to project the interaction effects of the operating conditions of the treatment system in terms of COD removal and biogas yield. The optimum region of the GMSAR was acquired at influent COD of 1239 mg/L, a leachate percentage of 14.2% and a pH of 7.3. These variables resulted in a 71.9% COD removal and 65.9mL/d of biogas yield. The percentage of leachate and COD influent resulted respectively in the most effective parameters on the COD removal and biogas yield of GMSAR.

 

Keywords: Landfill leachate, Anaerobic treatment, Multi-stage anaerobic reactor, Response surface methodology, Biogas yield

 

 

 

 

 

A Heterogeneous Relationships between Urbanization, Energy Consumption, Economic Growth on Environmental Degradation: Panel Study of Malaysia and Selected ASEAN+3 Countries

Ali Umar Ahmad, Suraya Ismail, Aminu Hassan Jakada, Ibrahim Sambo Farouq, Atiku Abubakar Muhammad, Umar Aliyu Mustapha, Ahmad Tijjani Abdullahi, Aminu Muhammad Fagge

Volume 8  |  Issue 2 |  Pages: 573-581 | PDF | HTML 

 

Abstract: This paper aims to analyse the association among urbanization, economic growth, energy consumption and environmental degradation based on estimates in the context of second-generation techniques. A Malaysian economy and selected ASEAN+3 were estimated using Pesaran (1999) Pooled Mean Grouped (PMG) and a panel dynamic common correlated effects (DCCE) technique pioneered by Pesaran and Chudik (2015) that measures a model of error correction (EC) which is resilient to cross-sectional dependency and co-integration. Evidence from the findings shows that the main actors or driving forces leading to a high level of environmental degradation are urbanization, economic growth, and energy consumption for Malaysia and selected ASEAN+3 nations. Also found was the existence of one-way causality running from economic growth to environmental degradation. It also indicates another one-way causality running from square of economic growth to environmental degradation. Whereas, a bidirectional causality is found between urbanization and environmental degradation, as well as a feedback causality among energy consumption and environmental degradation.

 

Keywords: Urbanization, environmental degradation, Energy consumption, Economic growth, Heterogeneous panel, Malaysia and Selected

ASEAN+3

 

 

 

 

Stability and Super Stability of Fuzzy Approximately Ring Homomorphisms and Fuzzy Approximately Ring Derivations

N. Eghbali

Volume 8  |  Issue 2 |  Pages: 582-588 | PDF | HTML 

 

Abstract: In this paper, we establish the Hyers-Ulam-Rassias stability of ring homomorphisms and ring derivations in the uniform case on fuzzy Banach algebras.

 

Keywords: Fuzzy normed space; Approximately ring homomorphism; Stability

 
 

 

 

Analyses the Effect of Monetary Policy Transmission on the Inequality in OECD Countries

 Mohammad Farajnezhad, Suresh A/L Ramakrishnan, Mani Shehni Karam Zadeh

Volume 8  |  Issue 2 |  Pages: 589-596 | PDF | HTML 

 

Abstract: The aim of this article is to analyze the inequality impacts of monetary policy transmission in OECD countries’ economy from 2001 to 2017. Panel regression model has been applied for the hypotheses test. Information gathering has been based on the country's basic information, i.e the data required for research are generally derived from the library method, using the World Bank website. The econometric method used in this research, is Generalized Torque Method. Dependent variable Gini coefficient index is considered as an indicator of income inequality and independent variables of monetary transfer mechanisms include interest rates, liquidity, exchange rates, the gold price, the legal reserves of the central bank and the banks' debt to the central bank. The results show that the interest impact of monetary transfer mechanism at the Gini coefficient as an indifference index in OECD countries is positive and insignificant (probability is 0.18) with a coefficient of 0.004 and it shows that raising interest rates will increase the inequality in these countries. Additionally, the effect of the capital market on the inequality is also positive with a coefficient of 0.001 and a significant probability of 0.002. It shows the positive effect of bank deposits on income inequality.

 

Keywords: Monetary Policy Transmission, Inequality, OECD countries

 

 

 

 

Influence of Adsorption Process Parameters on the Removal of Hexavalent Chromium (Cr(VI)) from Wastewater: A Review

Sunil Rajoriya, Ahlaam Haquiqi, Bhawna Chauhan, Girish Tyagi, Avdesh Singh Pundir, Ajay Kumar Jain

Volume 8  |  Issue 2 |  Pages: 597-603 | PDF | HTML 

 

Abstract: In recent years, the release of heavy metals into the aquatic environment has become a major issue. Numerous socio-economic problems are caused due to the presence of several heavy metals in wastewater. Hexavalent chromium (Cr (VI)) is one of the major heavy metal present in the wastewater which comes from various industries such as fertilizers, pesticides, metal cleaning, dyes and pigment, especially in tannery industry. Numerous methods have been employed for the removal of Cr (VI) from wastewater. Adsorption has been reported as a suitable method due to its high efficiency, low cost, generation of minimum chemical sludge and reusability of the prepared adsorbents. In this review, various adsorption process parameters such as solution pH, adsorbent dosage, temperature and initial Cr (VI) concentration have been reviewed on the removal efficiency of Cr (VI) from wastewater. The percentage removal of Cr (VI) strongly depends upon pH of the solution and the optimum pH range was found to be 1.0-4.0.  The reusability of the used adsorbents has also been discussed. It is comparatively good for practical applications. It can be concluded that the most of the adsorbents have good regeneration capability. This review paper suggested that the adsorption process parameters had an important role on the removal efficiency of Cr (VI) from wastewater.

 

Keywords: Adsorption, Wastewater treatment, Hexavalent chromium, Reusability

 

 

 

 

Yttria Stabilized Zirconia Thin Film as Solid Oxide Fuel Cell Electrolyte: Temperature Dependent Structures and Morphology

N. F. M. Rahimi, Sathiabama T. Thirugnana, S. K. Ghoshal

Volume 8  |  Issue 2 |  Pages: 604-609 | PDF | HTML 

 

Abstract: Fuel Cell is an electrochemical cell that supports clean and alternative energy that is mushrooming nowadays. Being a device of clean energy production, highly efficient solid oxide fuel cells (SOFCs) are increasing in demands. It converts the chemical energy into electrical energy in an environmentally-friendly way following green technology route. The SOFCs are one type of technology that has great promise to improve energy efficiency and to provide the society with clean and abundant energy. Yttria-stabilized zirconia (YSZ) is used as the electrolyte in SOFC wherein its synthesis with controlled properties is important to obtain the highest energy efficiency. The overall characteristics of the YSZ thin-film electrolyte in the SOFC are determined by its structures and morphologies. Based on these factors, a series of YSZ thin films were deposited on the sapphire wafer substrate by the dip-coating method and sintered in the temperature range of 900 – 1500 ˚C. The temperature dependent structural and morphological attributes of such thin films were determined and the prepared samples were characterized using XRD, AFM and Raman spectroscopy. The XRD patterns of the samples revealed the change in the crystallinity and phase, with an increase in the sintering temperatures while a tetragonal structure was observed at 1300 ˚C. Furthermore, the Raman spectral analyses supported the XRD results. The AFM morphology analysis of the thin films showed an increase in the grain size from 132.25 to 995.2 nm. The observed temperature-dependent changes in the structures and morphological attributes of these films may be useful for achieving high ionic conductivity required for an efficient SOFC construction.

 

Keywords: SOFC, Green technology, YSZ electrolyte, Thin film, Dip-coating, Structures, Morphology

 

 

 

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