Article Per Year (5 Year)
p-Index From 2021 - 2026
0.408
P-Index
This Author published in this journals
All Journal Indonesian Physical Review CSID Journal of Infrastructure Development (CSID-JID) Journal Of World Science INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY
Ali, Firdaus
Department Of Civil Engineering, Faculty Of Engineering, Universitas Indonesia
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Law, Crime, Criminology & Criminal Justice Physics Social Sciences

Published : 6 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 6 Documents
Search

 1 
Optimization of Water Resources Management of Depok City With Water Stress Index and SWOT Analysis Ali, Firdaus; Lestari, Dwi Lintang; Putri, Marsya Dyasthi; Azmi, Khalidah Nurul
CSID Journal of Infrastructure Development Vol 2, No 1 (2019)
Publisher : Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32783/csid-jid.v2i1.45

Abstract

Excessive groundwater use is one of an impact from excesses of population growth that can give impacts to environment quality. Therefore, conversion to piped water needs to be carried out immediately. Depok City Government has to add water treatment plants (WTP) that will use the rivers that cross the city. The four rivers are Angke, Pesanggrahan, Ciliwung, and Cikeas River, which is the river infrastructure is not optimal. This research has several goals, namely analysis of the water needs, evaluation of the condition of the rivers, and provide recommendations to the stakeholder. Therefore, it can be seen that there is a combination of several methods to convert quantitative data into qualitative. This study uses the analysis method of water-stress indicators (WSI) and water balance calculations to determine the condition of water resources in the Depok area at this time. The results of the analysis show that there are 2 villages with very high WSI, namely Bojongsari and Cipayung. This is due to the absence of piped water lines in the two regions. Based on the results of the water balance analysis, it can be seen that the strategy in increasing the capacity of WTP has a significant impact until 2027, but there needs to be additional supply back in 2027 as an increase in water demand so that depletion in the water balance can be avoided. Based on the Strengths, Weaknesses, Opportunities, and Threats (SWOT) analysis, it is found that the management of water resources of Depok City is on quadrant IV. Thus, the strategy to be applied is Adaptive Strategy, which is reduce the weaknesses and avoid threats. Therefore, the management of water resources Depok City is recommended to control the internal performance from falling apart. This strategy is maintained while continuing to improve itself.
Green City Development Concept Pilot Project in Serpong Urban Residential Ali, Firdaus; Lestari, Dwi Lintang; Putri, Marsya Dyasthi; Azmi, Khalidah Nurul
CSID Journal of Infrastructure Development Vol 2, No 1 (2019)
Publisher : Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32783/csid-jid.v2i1.23

Abstract

In recent times, continuous population growth and rising urbanization in many countries has made some considerable impact in the quality of life of people living in the urban area and in the environmental itself. The increasing number of people in an area will create a scarcity of resources and also degrade its environmental condition, especially the water resources. In order to counter these negative impacts, a sustainable urban development concept is put in place. This study uses three main focuses related to green city development concept, which are low water footprint, low carbon footprint, and zero/less delta runoff. The object of study is the implementation of the three main focuses selected in Serpong Urban Residential, as a pilot project of an integrated modern and rapid-growing residential area. This study includes the water balance produced from the calculation, and the strategic recommendation proposed for managing the water resources based on the review of the aspects. From the water balance, it is known that the area will have a water deficit in initial forecasted years. In this case, the amount of forecasted water deficit can be covered by utilizing either rainwater harvesting method or water recycling method. Therefore, Serpong Urban Residential can become a pioneer for developers with its integrated study related to the green city development concept.
Assessment of Water Supply Infrastructure and Service Challenges in Depok City Rahmansyah, Chandra; Ali, Firdaus
Journal of World Science Vol. 4 No. 6 (2025): Journal of World Science
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/jws.v4i6.1436

Abstract

This study assesses the infrastructure and service performance of the piped water supply system in Depok City, Indonesia, in relation to national and international benchmarks. Despite recent developments, the service coverage in 2024 only reached 22.33%, falling short of the RPJMN 2020–2024 target of 30%. Most residents (80.6%) still rely on groundwater due to affordability, accessibility, and trust issues. Projections indicate a substantial gap in water treatment capacity and reservoir storage, with an additional 1,250 L/s of treatment capacity and 40,000 m³ of storage required by 2045 to meet demand. The analysis also reveals a persistent Non-Revenue Water (NRW) rate of around 20%, indicating systemic inefficiencies. Institutional fragmentation and low community uptake of piped water services further hinder progress. Recommendations include infrastructure expansion, NRW reduction, stakeholder coordination, and community engagement. Furthermore, adopting smart water technologies and implementing a more integrated urban water management strategy are critical to achieving equitable access. The findings provide evidence-based insights for policymakers and utility providers to enhance water service delivery in rapidly urbanizing contexts while aligning with the Sustainable Development Goals and WHO standards.
POROUS MATERIAL ADSORBENTS IN ADVANCES DESIGN CONFIGURATION OF ADSORPTION DESALINATION PROCESS: A REVIEW Kusumadewi, Riana Ayu; Moersidik, Setyo Sarwanto; Laksono, Sucipta; Ali, Firdaus; Putra, Nandy; Budiningsih, Shafira; Luthfiyya, Widi Ajeng
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY VOLUME 8, NUMBER 1, APRIL 2025
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v8i1.22613

Abstract

Several desalination systems with distinct operational principles have been developed to enhance the generation of freshwater and optimize system efficiency. Adsorption desalination (AD) systems are highly desirable because to their ability to simultaneously achieve desalination and cooling using minimal energy input. These systems offer significant cost savings in terms of maintenance compared to conventional desalination systems. In order to gain a comprehensive understanding of the fundamental constituents of this desalination technology, the present study initially expounds upon the theory of adsorption and the process of circulation. Aims: The aim of this study is to conduct a thorough analysis of adsorbents for adsorption desalination and adsorption desalination technologies, and investigation into their potential integration with established conventional cycles, including multiple-effect distillation (MED), solar regenerable, and integrated evaporator-condenser cycles. Methodology and results: The findings of this study involve the evaluation and summarization of pertinent research on the fundamental aspects of the adsorption desalination system. These aspects include the thermodynamic process and cycle, performance assessment, adsorbents, and adsorption desalination technologies. The location, heat energy supply, collector, evaporator, condenser, adsorption desalination, adsorbent materials, and findings are investigated. Conclusion, significance and impact study: The discourse pertaining to prospective avenues of research, which will prove beneficial for analogous investigations within this domain, reaches a culmination.
STRUCTURAL AND MORPHOLOGICAL INVESTIGATION OF FUNCTIONALIZED REDUCED GRAPHENE OXIDE-MULTI WALLED CARBON NANOTUBES NANOCOMPOSITE Upadhyay, Chandramani; Shahzad, Hanzala; Javid, Mehreen; Soni, Bhumika; Ahmad, Tameem; Azmi, Kashif; Ali, Md Arshad; Ali, Firdaus
Indonesian Physical Review Vol. 3 No. 3 (2020)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v3i3.61

Abstract

2D materials like Graphene and its composite has emerged as most valuable and major concern because of their peculiar properties in field of nanotechnology in past few decades. Herein, we report the effective technique for the synthesis of functionalized r-GO/MWCNTs nanocomposite using probe sonication. The synthesized samples were tested via XRD, FESEM, FTIR and Raman Spectroscopy. X-ray diffraction technique was used for the structural analysis of the samples which revealed that most prominent peak was observed around 2θ~26°. Surface morphology of the samples were studied via FESEM, which revealed that r-GO layers were wrapped around the MWCNTs. Raman spectra were recorded for the determination of quality of r-Go and MWCNT via the position and intensity of D and G band. The various functionalities present on the samples were identified via FTIR spectra.
SYNTHESIS OF CdS NANOPARTICLES BY CHEMICAL Co-PRECIPITATION METHOD AND ITS COMPARATIVE ANALYSIS OF PARTICLE SIZE VIA STRUCTURAL AND OPTICAL CHARACTERIZATION Ali, Syed Kaabir; Wani, Henna; Upadhyay, Chandramani; Sai Madhur, K.S.S.N.; Khan, Imran; Gul, Sabia; Jahan, Nushrat; Ali, Firdaus; Hussain, Salim; Azmi, Kashif
Indonesian Physical Review Vol. 3 No. 3 (2020)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v3i3.64

Abstract

CdS is an important wide bandgap chalcogenides most popularly studied for various optoelectronics and biosensing applications. In this study, CdS Nanoparticles (NPs) have been prepared successfully by chemical co-precipitation method, using cadmium acetate and sodium sulphide as precursors. A comparative study of average particle size calculated by Scherrer Plot, Uniform Deformation Model (UDM), Dynamic Light Scattering (DLS) analysis and Brus Model has been done here. The structural and optical behaviour of synthesized samples were investigated via X-ray diffraction (XRD), DLS and UV–Visible Spectroscopy. The XRD spectra of the prepared CdS NPs revealed the crystalline phase having cubic structure. The average particles size has been studied via Debye Scherrer equation and Scherrer Plot. For the theoretical calculations of particle size along with the induced lattice strain, considering the broadening effect of lattice strain, Williamson-Hall analysis was employed. Assuming the lattice strain to be isotropic in nature, UDM was applied for calculation. The particles size distribution profile in terms of volume as well as intensity was recorded using DLS analysis in ethanol medium at room temperature. Besides this, the energy bandgap was obtained by applying Tauc model in the recorded absorption spectra. The obtained value of bandgap was used in Brus model for estimating the average particle size. The obtained comparative results show that the average particle size of the prepared CdS NPs estimated from Scherrer equation, Scherrer plot, UDM plot and Brus model are almost similar and lies in the range of 2-5 nm whereas the results of DLS showed wide variation in the range of 40-600 nm.
Co-Authors Ahmad, Tameem Ali, Md Arshad Ali, Syed Kaabir Azmi, Kashif Azmi, Khalidah Nurul Budiningsih, Shafira Gul, Sabia Hussain, Salim Jahan, Nushrat Javid, Mehreen Khan, Imran Kusumadewi, Riana Ayu Laksono, Sucipta Lestari, Dwi Lintang Luthfiyya, Widi Ajeng Nandy Putra Putri, Marsya Dyasthi Rahmansyah, Chandra Sai Madhur, K.S.S.N. Setyo Sarwanto Moersidik Shahzad, Hanzala Soni, Bhumika Upadhyay, Chandramani Wani, Henna