Tengku Nuraiti Tengku Izhar
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Preferred name
Tengku Nuraiti Tengku Izhar
Official Name
Tengku Nuraiti, Tengku Izhar
Alternative Name
Tengku Izhar, Tengku Nuraiti
Tengku Izhar, T. N.
Izhar, T. N.T.
Izhar, T. Nuraiti T.
Izhar, T. N.Tengku
Main Affiliation
Scopus Author ID
57189071410
Researcher ID
AAY-2768-2021

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  • Publication
    Malaysian and Libyan Perspectives on Single-Use Plastic's Environmental Impact During the Pandemic COVID-19: A Pilot Study
    ( 2023-01-01)
    Zreba K.Y.A.
    ;
    Tengku Nuraiti Tengku Izhar
    ;
    Farah Naemah Mohd Saad
    ;
    Irnis Azura Zakaria
    ;
    Hwidi R.S.A.
    Plastics have become a significant threat to natural ecosystems as well as human health. The use and consumption of plastics improves our quality of life significantly, but it is critical to transition to more sustainable alternatives. Thus, the current study proposes an investigation into the impact of single use plastic products during pandemic on the impact to the environment from the Malaysian and Libyan perspective. A pilot study was conducted to examine the strength of the questionnaire in collecting on the environmental impacts of single use plastic during COVID-19 pandemic distributed across two countries (Libya and Malaysia). SPSS was used to test the questionnaires' strength with 40 participants, 20 in each nation. The reliability test results with Cronbach’s Alpha predicted values of 0.7-0.86 and actual data Alpha values 0.87-0.93, normal test of variance inflation factor ranging between 1 and 5, skewness and kurtosis values of -1.343 to -0.076 and 5.312 to -0.024 respectively confirmed the strength of the questionnaires as benchmarked in the literature. Further, the participants' responses to the quality of the questionnaire in determining the single use plastic impact to environmental have clearly revealed the strength and applicability of this questionnaire for wider data collections.
  • Publication
    Comparative Study between Organic Liquid Fertilizer and Commercial Liquid Fertilizer and Their Growth Performances on Mustard Greens
    ( 2023-01-01)
    Muthu H.D.
    ;
    Tengku Nuraiti Tengku Izhar
    ;
    Irnis Azura Zakaria
    ;
    Farah Naemah Mohd Saad
    ;
    Ngaa M.H.
    Organic liquid fertilizers (OLF) are made up of essential plant nutrients, as well as beneficial microbes that assist in the recycling of organic waste. The purpose of this study was to determine the macronutrient content of organic liquid fertilizers and compare the growth performance of mustard greens under Wick System hydroponic conditions. Market wastes also known as vegetable wastes, were utilized to produce organic liquid fertilizers and compare it to commercial fertilizer (Nutrient Solution, NS). The vegetable wastes were fermented with water and Effective Microorganisms (EM) Bokashi separately. The ratios used for fermentation are 2 kilograms of vegetable wastes, 0.5 litres of water and 100 grams of EM Bokashi. A parameter study on the OLF and OLF with Bokashi to determine the nitrogen (N), phosphorus (P) and potassium (K) were done. Thereafter, four Wick System (pure water, OLF, OLF with Bokashi and NS) were setup to monitor the growth performance of mustard greens twice a week. The organic liquid fertilizers are produced after 40 days of fermentation and used at a dilution of 1: 10 in the hydroponic system. The OLF and OLF with Bokashi showed the ranges of pH values as 5.1 and 4.6 respectively. The results for the hydroponic system showed that OLF demonstrated the best growth performance. The number and size of leaves and the height of the plants in the NS hydroponic system were almost similar to the plants in OLF hydroponic system. The colour of plants in OLF changed slightly to yellowish green towards the end of the growing season. The life spent of mustard greens in OLF with Bokashi hydroponic system was the least compared to other hydroponic system. This study showed that organic liquid fertilizer is as effective as commercial liquid fertilizer. Considering, it has all the nutrients that plants need to grow.
  • Publication
    User, industry, and waste management perspectives on single-use plastic's environmental impact during the pandemic : a pilot study
    ( 2022-01-01)
    Zreba K.Y.A.
    ;
    Tengku Nuraiti Tengku Izhar
    ;
    Irnis Azura Zakaria
    ;
    Hwidi R.S.A.
    Plastics have become a significant threat to natural ecosystems as well as human health. The use and consumption of plastics improves our quality of life significantly, but it is critical to transition to more sustainable alternatives. Thus, this study proposes an investigation into the impact of single use plastic products during pandemic on the impact to the environment from the perspective of the user, industry, and waste management. A pilot study was conducted to examine the strength of the questionnaire in collecting on the environmental impacts of single use plastic during coronavirus pandemic with two groups of participants (industry and users) distributed across two countries (Libya and Malaysia). SPSS was used to test the questionnaires' strength with 40 participants, 20 in each nation. The reliability test results with Cronbach's Alpha predicted values of 0.7-0.86 and actual data Alpha values 0.87-0.93, normal test of variance inflation factor ranging between 1 and 5, skewness and kurtosis values of -1.343 to -0.076 and 5.312 to -0.024 respectively confirmed the strength of the questionnaires as benchmarked in the literature. Further, the participants' responses to the quality of the questionnaire revealed the strength and applicability of this questionnaire for wider data collections.
  • Publication
    Performance of Two Phase Anaerobic Digestion on Food Waste for Biogas Production
    ( 2022-01-01)
    Zakarya I.A.
    ;
    Tengku Nuraiti Tengku Izhar
    ;
    Siti Khadijah Za'aba
    ;
    Hilmi N.A.M.
    ;
    Mohd Rashidi Che Beson
    ;
    Matei M.
    Every year, the total amount of solid waste generated in Peninsular Malaysia grew, according to the Malaysia government. The typical solid waste management system practiced in developing country brings many problems that can cause risks and hazards for living things and the environment in Malaysia if there are not managed properly. For example, illegal dumping cause groundwater and soil pollution. The methane gas produced from the landfill causes greenhouse effect. Food waste is categorized under household waste, where it is produced in residential areas, restaurants, cafeteria, markets and commercial areas. Therefore, anaerobic digestion process is introduced for organic waste with higher solids contents such as food waste as an alternative method. The effectiveness of anaerobic digestion process can be investigated through this process. In this study, two phase of anaerobic digesters was proposed. The reactor was operated at a temperature 35 °C, analyzed for biogas production, pH values and C/N ratio. The highest biogas production in this study is 50.4%. For a co-digestion containing more sludge can increase the pH value and biogas production.
  • Publication
    Overview on use of zeolites as bulking agent to optimize organic waste composting process
    ( 2020-12-29)
    Hamid N.J.A.
    ;
    Kadir A.A.
    ;
    Sarani N.A.
    ;
    Hassan M.I.H.
    ;
    Hashar N.N.H.
    ;
    Hashim A.A.
    ;
    Hissham N.F.N.
    ;
    Yi L.Q.
    ;
    Tengku Nuraiti Tengku Izhar
    There is about 2.01 billion metric tons of municipal solid waste (MSW) produced annually and organic waste constitutes of a major portion from total waste generation worldwide. This current circumstance not only create extra burden on the landfill, but also causing some environmental issues such as greenhouse gases emission, odor emission and leachate production. Therefore, a sustainable and pro-environmental of organic waste disposal solution is acknowledged by composting practice. However, organic waste consists of some significant properties include high in salt, oil, nitrogen and moisture content. All of these properties contributing difficulties on the efficiency of organic waste composting process. In previous studies, researchers had studied various bulking agents such as biochar, sawdust, lime and others in order to optimize the efficacy of composting process. Nevertheless, utilization of zeolite as bulking agent in composting process is getting famous in the recent years due to its unique physiochemical characteristics. Hence, this article attempts to review the potential of zeolites in optimizing the composting process for better understanding of the mechanism as well provides valuable insights for sustainable organic waste management practice.
  • Publication
    Mediating Effect of COVID-19 Pandemic on Single Use Plastic Production, Usage and Disposal Management Models Correlations
    ( 2023-01-01)
    Zreba K.Y.A.
    ;
    Tengku Nuraiti Tengku Izhar
    ;
    Irnis Azura Zakaria
    ;
    Hwidi R.S.A.
    ;
    Hweidi A.S.A.
    This research examines the consequences of the COVID-19 epidemic on the production, use, and disposal of single-use plastics. This research explores the intricate relationships between the impacts of COVD-19 on single-use plastic production, usage, and waste management with a focus on the mediating effects of the pandemic related to model parameters and correlations to develop a trustworthy approach. The report examines first the increasing evidence regarding the pandemic's influence on various users and industries, and then the consequences for waste management and the environment. The research then examined the relationships and modelling framework correlations between the variables utilised to estimate the influence of COVID-induced changes in production, consumption, and management on single-use plastics. The study variables captured the influence of production, usage, and disposal on the environment. The study's parameters are equally linked to types of usage, have a pronominal effect, and disposal plays a vital role in the environmental impact, which makes them extremely dynamic for parameters in this study. Single-use plastic aggregation in the environment is predicted to be a dominant mechanism by disposal behaviour.
  • Publication
    A Comparative Study on Generation and Composition of Food Waste in Desa Pandan Kuala Lumpur During Covid-19 Outbreak
    ( 2022-01-01)
    Irnis Azura Zakaria
    ;
    Rashidy N.A.
    ;
    Tengku Nuraiti Tengku Izhar
    ;
    Ngaa M.H.
    ;
    Laslo L.
    Food waste is a type of solid waste that is heavily influenced by consumers. The composition (%) and the total weight generation (kg) of food waste were determined during the Covid-19 outbreak. The data was obtained by direct weighing of the food waste collected where it was generated throughout the day. Findings have shown that 63.3% of the composition of uncooked food waste types identified is generated by internal organs, vegetables, fruits, and eggshells, while 36.7% of the identified composition of cooked food waste types is generated by rice and noodles, bones, vegetables, fruits, and others in Desa Pandan. During six days of collection, the total food waste generated by 30 households, 10 restaurants, and 3 schools was 146.5 kg (0.20 kg/capita/day), 231.7 kg (0.026 kg/capita/day), and 155.4 kg (0.010 kg/capita/day) respectively. A food waste awareness survey was conducted online with 100 respondents using Google Forms. Findings show that the Covid-19 pandemic did influence people's attitudes and practices regarding food purchase, management, and consumption habits, all of which have a substantial impact on reducing food waste generation at the household level.
  • Publication
    A Study on the Environmental Impact During Distribution and Disposal Stages for the 3-Ply Face Masks by Using Life Cycle Assessment (LCA)
    ( 2022-01-01)
    Chow Suet Mun Christine
    ;
    Tengku Nuraiti Tengku Izhar
    ;
    Irnis Azura Zakaria
    ;
    Sara Yasina Yusuf
    ;
    Ayu Wazira Azhari
    ;
    Boboc M.
    The demand of face masks had increased tremendously due to pandemic outbreak of COVID-19, leading to the increment production rate of face masks in Malaysia. Waste is also produced at the same time, resulting impacts towards the environment. Due to the land scarcity issue in Malaysia, the end of life treatment for the waste is taken into consideration. The study tools used in this study is life cycle assessment (LCA) to identify the significant potential environmental impact produced during the life cycle stages for distribution and disposal through GaBi Education Software. The disposal stage between landfill and incineration of the 3-Ply face masks is studied to determine the end of life treatment for it. The impact assessment method selected in this study is CML 2001-Jan 2016 with the environmental indicator of Global Warming Potential (GWP), Acidification Potential (AP), Eutrophication Potential (EP) and Ozone Depletion Potential (ODP). GWP results in producing highest impact to the environment during both distribution and disposal stages. The impact of GWP also relates to the climate change. Modern incineration is recommended to overcome the issue of land scarcity in Malaysia as the amount of waste by 3-Ply face masks are increasing due to the pandemic COVID-19, reducing the impacts towards the environment.
  • Publication
    Adsorption of hydrogen sulfide (H2s) from municipal solid waste by using biochars
    ( 2022-12-15)
    Tengku Nuraiti Tengku Izhar
    ;
    Kee G.Z.
    ;
    Farah Naemah Mohd Saad
    ;
    Shayfull Zamree Abd. Rahim
    ;
    Irnis Azura Zakaria
    ;
    Che Besom
    ;
    Ibad M.
    ;
    Syafiuddin A.
    The emission of hydrogen sulfide (H2 S) from municipal solid waste is one of the environmental issues that raised the public’s attention and awareness. Exposure to H2 S that brings a foul smell of rotten eggs will cause headaches, irritation, dizziness, fatigue, and even death if the concentration of H2 S is too high. The study’s goals are to investigate the properties of biochars made from rice hulls, banana peels, and sawdust; to compare the biochars’ physical and chemical properties; and establish the H2 S removal efficiency of the three biochars. Biochars derived from rice hull (RHB-500), banana peel (BPB-550), and sawdust (SDB-500) by pyrolysis were used as the adsorbents. The biochar yield, pH, ash content, surface functional group, and morphology of the biochars produced were investigated. In this study, H2 S was synthesized by mixing food waste and soil in the experimental column. The H2S produced was reduced by the adsorption method. The removal efficiencies of H2 S for each biochar were determined by allowing the synthetic H2 S to flow through the two columns that were packed with sand (act as control) and biochars, respectively. All biochars were alkaline, and BPB-550 had the highest pH, followed by SDB-500 and finally RHB-500. The order for removal efficiency of H2 S (>94%) is BPB-550 > SDB-500 > RHB-500. Overall, the biochars derived from biomass had a strong ability to act as the adsorbents for H2S removal.
  • Publication
    A study on Hydrogen Sulphide as potential tracer in landfill gas monitoring
    ( 2013)
    Tengku Nuraiti Tengku Izhar
    ;
    Zaity Syazwani Mohd Odli
    ;
    Irnis Azura Zakarya
    ;
    Farah Naemah Mohd Saad
    ;
    Tan Ley Binn
    ;
    Roshazita Che Amat
    ;
    Norlia Mohamad Ibrahim
    Municipal solid waste (MSW) landfills are one of the major source of hydrogen sulphide (H2S) which is the offensive odours potentially creating annoyance in adjacent communities. This project focuses on H2S emission from landfills in Perlis, Malaysia. Landfill gas (LFG) samples were collected and analyzed accordance with NIOSH method 6013. The mean concentrations of H2S in Kuala Perlis Landfill and Padang Siding Landfill are 210.68 ppm and 242.85 ppm respectively. High concentrations of H2S may be a concern for employees working on the landfill site. These results indicate that workers should use proper personal protection at landfill when involved in excavation, landfill gas collection, and refuse compaction. The formation of H2S most likely to be contributed by the biological conversion of sulfate from gypsum-rich soils and landfill wastewater treatment sludges by sulfate-reducing bacteria (SRB) which can utilize dissolved sulfate as an electron acceptor. H2S is conveniently detected by hand held analyzer, such Jerome meter, landfill gas analyzer. In the organic range, in the ease of detection range in the dispersion rate within the landfill site, the monitored H2S gas form a very noticeable concentration with the travelling wind direction. It proved that the dispersion rate of H2S are suitable as tracer to detect route of travelling in a certain distance.