Indonesian Journal of Urban and Environmental Technology
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TRENDS AND EVOLUTION OF PLASMA TECHNOLOGY FOR WASTEWATER TREATMENT FROM 2000 TO 2024: A SYSTEMATIC BIBLIOMETRIC ANALYSIS
Full text linkThe crisis in clean water availability due to population growth, industrialization, and climate change has driven the need for more effective and sustainable wastewater treatment technologies. Plasma technology is emerging as a potential solution capable of overcoming the limitations of conventional methods, especially in the degradation of complex pollutants and new polluting compounds. Aim: This study aimed to identify trends, developments, and research gaps related to the application of plasma technology in wastewater treatment during the period 2000-2024. Methodology and results: A bibliometric analysis was conducted to map the publication trends, most influential sources, and research networks, while qualitative content analysis was used to classify research themes and highlight key findings from the selected papers. One hundred sixty-five papers on plasma technology application in wastewater treatment were retrieved from four databases and analyzed. The results show that research in this field is categorized into four main themes: plasma-based pollutant degradation, plasma-enhanced oxidation processes, energy-efficient non-thermal plasma reactors, and dielectric barrier discharge (DBD) for environmental treatment. Furthermore, the research focus has shifted from basic plasma exploration to applying plasma technology for water treatment and efficiency improvement. Conclusion, significance and impact study: This study provides recommendations for future research based on the findings of current research trends and themes, aiming to guide the development of more effective and sustainable plasma-based wastewater treatment technologies
RENEWABLE ASPHALT PAVEMENT: A BIBLIOMETRIC SYSTEMATIC LITERATURE REVIEW ON CHALLENGES, METHODOLOGIES, AND INNOVATIONS
No full textAims: This study aimed to investigate the challenges, methodologies, and innovations in the development of renewable asphalt pavements. It focused on evaluating the long-term performance, structural stability, and durability of renewable materials compared to conventional asphalt, while also identifying economic, regulatory, and technical barriers to their implementation. Methodology and results: A bibliometric systematic review was conducted using Scopus, following the PRISMA protocol. Co-occurrence and citation network analyses identified research trends and gaps. Findings reveal that reclaimed asphalt pavement (RAP) can reduce CO₂ emissions by 29.3%, while piezoelectric sensors in hot mix asphalt (HMA) can generate 76.56 MWh/month. Basalt fiber enhances hydrothermal resistance, and RAP in concrete improves shrinkage resistance with minor strength and density reductions. Conclusion, significance, and impact study: This research provides a comprehensive overview of renewable asphalt pavement, underscoring both its environmental benefits and current limitations. The insights provide valuable guidance for researchers, industry stakeholders, and policymakers in developing innovative and sustainable road infrastructure solutions. Future research should address the identified gaps to accelerate the adoption of renewable solutions in road construction
UTILIZATION OF GROUND GRANULATED BLAST FURNACE SLAG (GGBS) AS AN ENVIRONMENTALLY FRIENDLY PARTIAL REPLACEMENT FOR CEMENT TO IMPROVE CEMENT-BENTONITE EROSION RESISTANCE
No full textCement-bentonite (CB) barriers are frequently employed to mitigate seepage in critical infrastructure such as dams, yet they face persistent challenges from cracking and erosion under hydraulic stresses. Aims: This study aimed to determine whether utilizing ground granulated blast furnace slag (GGBS) as an environmentally friendly partial replacement for cement could enhance the erosion resistance of CB mixtures. Methodology and Results: Laboratory tests were conducted on CB specimens with 0%, 20%, and 50% GGBS replacement, cured for 7, 14, 21, and 28 days. Mechanical integrity was assessed via tensile strength testing, whereas erosion behavior was evaluated using an erosion function apparatus (EFA), measuring erosion rate, critical velocity, and flow parameters. Results revealed that GGBS-modified CB samples experienced a tensile strength increase of up to 180% relative to the control, particularly at extended curing durations. Additionally, the critical velocity necessary to initiate erosion was as much as 94% higher in GGBS-enhanced samples, indicating improved microstructural resilience. Conclusion, significance and impact study: Partial cement replacement with GGBS strengthens CB and improves its erosion resistance, supporting GGBS as a more sustainable binder choice. Scope and limitations: Results are from lab tests on CB mixes (0-50% GGBS; 7-28-day curing; EFA velocity range). Field behaviour can vary with hydraulics, interfaces, and placement; confirm constructability and performance for project conditions
GEOGRAPHIC INFORMATION SYSTEM-BASED EVALUATION OF THE ECOLOGICAL CONNECTIVITY INDEX MAP ACROSS PATCH SIZE SPECTRUMS: A CASE STUDY OF MAKASSAR CITY
No full textAims: This paper investigates the ecological functional areas of Makassar City by utilizing land cover spatial data from 1997 and 2012 to evaluate ecological connectivity through Geographic Information Systems (GIS). Methodology and results: A spatial analysis of these ecological functional areas was conducted across different patch size categories to assess the percentage distribution of each land-use type. Additionally, the comparative distribution of the Ecological Connectivity Index (ECI) map for Makassar City was simulated. The findings indicate a decline in connectivity levels in previously natural areas surrounding Makassar, particularly in the western and eastern regions of the city. The ECIs have significantly decreased from 1997 to 2012, primarily due to the impacts of urban development in low-density, dispersed suburban areas. The results suggest that optimal quantitative criteria for ecological functional areas at the city scale of Makassar can be classified within patch size spectrum III. Implementing well-designed strategies could help mitigate the loss of ecological connectivity, thereby supporting the protection and restoration of Makassar’s environmental integrity. Conclusion, Significance, and Impact of Study: from a landscape ecological perspective, a significant trend observed in Makassar City over the past fifteen years has been the rapid fragmentation and transformation of its natural landscape. This has led to the emergence of numerous habitat patches that are progressively smaller and more disconnected. A thorough understanding of the interactions between spatial patterns and ecological processes across various scales is essential for effective landscape and environmental studies
ASSESSMENT OF CARBON EMISSIONS FROM THE WASTE MANAGEMENT SECTOR IN AJATAPPARENG REGION, SOUTH SULAWESI, INDONESIA
No full textAjatappareng is a region in South Sulawesi Province, Indonesia which consists of four regencies and one administrative city. The regencies are Barru, Sidenreng Rappang, Pinrang, and Enrekang while the city is Parepare. The area has experienced a significant growth in terms of population which further leads to an increase in waste generation. Waste are a major challenge for environmental management especially due to the role in producing carbon emissions. Aim: This study aims to assess the carbon emissions produced in waste management sector of the Ajatappareng Region. Methodology and results: The GHG Simulation-Version II spreadsheet was used to assess the GHG emissions from the transportation of waste in the respective regencies. Mathematical formulas were provided in the cells to calculate the GHG emissions of the simulation developed. Conclusion, significance, and impact study: The results showed that the volume of carbon emissions was 16,299.84 kg CO2-eq/month for Barru Regency, 17,076.03 kg CO2-eq/month for Sidrap Regency, 16,817.30 kg CO2-eq/month for Parepare City, 17,722.85 kg CO2-eq/month for Pinrang Regency, and 19,145.85 kg CO2-eq/month for Enrekang Regency. Moreover, the GHG emissions from mixed waste in the final disposal site were 918,531.01 kg CO2-eq/month, 1,733,537.85 kg CO2-eq/month, 1,404,917.59 kg CO2-eq/month, 1,723,004.12 kg CO2-eq/month, and 523,506.36 kg CO2-eq/month, respectively. Therefore, potential efforts are required to reduce CO2 emissions by optimizing waste transportation, promoting recycling, managing organic waste through composting, as well as improving collaborations with the private sector
COMBINATION OF FeCl3 AND Fe3O4 AS A MAGNETIC COAGULANT FOR CONGO RED REMOVAL
Full text linkWater pollution remains a critical environmental issue, necessitating efficient treatment technologies, among which, coagulation is still widely applied due to its effectiveness in removing colloidal particles and organic pollutants. Inorganic coagulants remain a preferred coagulant despite drawbacks such as excessive sludge formation and long settling times. To address these limitations, the integration of magnetic nanoparticles to form magnetic coagulants has emerged as a promising strategy. Aims: This study was aimed to investigate the effectiveness of the FeCl3 - magnetite (Fe3O4) combination as a magnetic coagulant for the removal of Congo red from synthetic wastewater. Methodology and results: The influence of key parameters, including pH (3-8), coagulant dose (4-44 mL/L), magnetite dose (0-200 mg/L), and initial dye concentration (50-100 mg/L), was systematically evaluated. Coagulation experiment was done by using a standard jar test apparatus. The settling kinetic was evaluated by using pseudo-first and second-order kinetic model. Conclusion, significance and impact study: It was found that pH 6, coagulant dose of 20 mL/L FeCl3 0.5 M, and magnetite dose of 150 mg/L gave the best coagulation efficiency with 95% removal of 50 mg/L Congo red wastewater. Furthermore, the settling kinetics showed a good suitability with non-linear pseudo-second order-model kinetics. Results demonstrated that FeCl3-Fe3O4 as a magnetic coagulant significantly improved floc formation, settling efficiency, and overall pollutant removal
ASSESSING THE SUITABILITY OF NATURE-BASED SOLUTIONS (NBS) FOR FLOOD RISK REDUCTION: A CASE STUDY OF THE SERAYU WATERSHED IN PURBALINGGA REGENCY, CENTRAL JAVA
No full textThe Serayu Watershed is one of the critical watersheds in Central Java, particularly in the upstream. Aim: This study aims to assess the suitability of nature-based solutions (NBS) in flood risk reduction in the Serayu Watershed. Methodology and results: The collected data included the Serayu Watershed boundary and spatial datasets, consisting of a Digital Elevation Model (DEM), infiltration area map, soil erosion map, land use map, and slope map. The authors applied a spatial analysis method using the Geographic Information System (GIS) to integrate historical flood data, population density, topography, slope, geology, soil type, land use, water catchment area, water absorption area, groundwater basin, and erosion rate. The study found that within 10 years (2014-2023), 54 villages were exposed to flooding with a total area of 6,453.3043 ha or 8.010% of the area of Purbalingga Regency. The analysis of land use changes from 2017 to 2022 shows a significant decrease in the area of plantation forests-by 225,477.67 ha, from 323,979.26 ha to 98,501.58 ha. Conclusion, significance, and impact study: This study examines the regional characteristics and flood patterns of the Upper Serayu River in Central Java, Indonesia. Drawing on spatial analysis and hydrological data, the findings identified five NBS recommended for implementation: river floodplain restoration river and stream renaturation, building-related interventions, bioretention areas, and urban farming. These strategies align with local geormorphological conditions and offer sustainable approaches to flood mitigation. This study contributes to regional policy-making and supports the development of flood risk management in the Upper Serayu Watershed
COMPOSITION OF EMPTY FRUIT BUNCH, BIOGAS, AND MESOCARP AS RENEWABLE ENERGY TO REPLACE PALM KERNEL SHELL WITH THE OPTIMUM GAS EMISSION (SO2, NO2 AND CO2) IN INDUSTRY
Full text linkIndonesia is the largest palm oil-producing country in the world, with a share of 59%. In 2013 to 2023, palm oil production in Indonesia increased by an average of 4.7%. The emergence of waste also increases along with the increase in production. Palm oil mill waste consists of palm oil mill liquid waste (POME), mesocarp fiber, palm kernel shells, and empty oil palm bunches. In this study, waste from palm oil, such as mesocarp fiber and empty fruit bunches, can be used to replace the palm kernel shells. Moreover, the addition of biogas to mesocarp fiber and empty fruit bunches will be used as an addition to replace fuel in boiler. Gas emission (SO2, NO2 and CO2) is key parameter for process combustion in boiler Boiler gas emission is regulated by Ministry of Environment regulation. Aim: This study was aimed to analyze and determine the optimum composition that can be used in boiler fuel where gas emissions are the main parameters, especially N02, SO2 & CO2. Methodology and results: The method in this study are a literature review, analyzing materials for proximate and ultimate, then analyzing the results. The results of this study are the optimum composition of 85% mesocarp fiber, 10% biogas, and 5% empty bunch fiber where composition SO2 and NO2 do not exceed the threshold and the lowest CO2 gas production. Conclusion, significance and impact study: This study can be impacted to decrease waste from palm oil industry and used the waste palm as new alternative energy that can replace fuel in boiler
SUSTAINABLE NICKEL RECOVERY FROM NICKEL SLAG WASTE USING DIETHYLAMINE DITHIOCARBAMATE: ENHANCING RESOURCE EFFICIENCY AND MINIMIZING ENVIRONMENTAL IMPACT
Full text linkSlag waste from the metal refining industry, if left to accumulate for a long time, can become a source of environmental pollution due to the content of heavy metals that can dissolve and spread to the surrounding environment. However, slag can also be an alternative source for obtaining valuable metals. Aim: This study aims to examine the ability of diethylaminedithiocarbamate ligands to recover nickel metal from slag waste through the mechanism of complex compound formation. Methodology and results: The extraction process was carried out at the optimal pH for each ligand to maximize the selectivity and efficiency of metal recovery. Characterization of the complex compounds from the reaction was carried out using various analytical techniques, including Fourier Transform Infrared Spectroscopy (FTIR), UV-visible spectroscopy (UV-Vis), X-Ray Diffraction (XRD), Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy (SEM-EDS), and melting point tests to determine the thermal stability of the compound. The study results indicate that diethylaminedithiocarbamate ligands can selectively form complex compounds with nickel metal in slag and are effective in recovering metals from slag waste with a recovery value of 94.88%. Conclusion, significance, and impact study: The results of this study indicate that using diethylaminedithiocarbamate ligands can be an environmentally friendly approach to using slag waste as a secondary source of metals
