Wyniki wyszukiwania - BazTech

1

Temporal Variation of Microplastic Abundances and Characteristics in Surface Water of Banger River of Pekalongan City, Indonesia

Despasari Bella, Andarani Pertiwi, Priyambada Ika Bagus, Inoue Takanobu

Journal of Ecological Engineering

|

2023

|

Vol. 24, nr 9

39--49

EN

The presence of microplastic pollution in coastal areas has garnered attention due to its detrimental impact on aquatic ecosystems and human health. In this study, our objective was to identify and characterize microplastics in the Banger River area of Pekalongan City, which is known for its numerous industrial activities, particularly batik small-medium industries. The extraction process involved filtration, drying, wet peroxide oxidation, density separation using NaI, and identification of microplastic particles. The shape, color, and size of the particles were characterized using a stereo microscope, while Fourier Transform Infra-Red Spectrometer and the hot needle method were employed for chemical structure analysis. Given that rivers serve as primary conduits for waste transport from land to sea, we conducted sampling at different times of the day. Our findings revealed an average of 0.61 ± 0.47 particles/m3 in the morning, 0.59 ± 0.67 particles/m3 in the afternoon, and 0.10 ± 0.02 particles/m3 in the evening. Among the microplastic polymers analyzed, we successfully identified polypropylene as one of the two predominant types. To establish a baseline for mitigating the release of plastic waste and microplastic residues into the environment, long-term monitoring is essential to evaluate the flow of plastic waste and microplastics from Indonesian rivers to the oceans.

2

Review of Household Waste Management Technology for a Greener Solution to Accomplish Circular Economy in Salatiga, Indonesia

Al Qadar Syahrul, Budihardjo Mochamad Arief, Priyambada Ika Bagus, Puspita Annisa Sila

Ecological Engineering & Environmental Technology

|

2023

|

Vol. 24, iss. 9

1--14

EN

Transitioning to a circular economy as an option of mitigating environmental challenges posed by traditional linear consumption patterns has garnered considerable attention. This study examines innovative approaches to circular economy principles in the context of Salatiga’s domestic waste management. The aim is to conduct a thorough evaluation of various waste management technologies and their potential to contribute to a more sustainable and circular waste management system. The research utilizes a review-based technique, drawing insights from current academic literature, papers, and case studies relevant to circular economy practices and household waste management technologies. To find new methods that have been successfully implemented in a variety of cities, a comprehensive literature search is performed. This research attempts to give a thorough evaluation of these methods relevance to the Salatiga environment by assessing their accomplishments, obstacles, and outcomes. This research showed that several waste management techniques, such as landfilling, incineration, and minimal recycling, are used in Salatiga. The research uncovered a number of novel methods for enacting a circular economy, including community-based recycling programs, waste-to-energy conversion, and expanded producer responsibility efforts. Few people are aware of the issue, there isn’t enough support system in place, and resources are restricted.

3

Marine and macroplastic litter monitoring and strategic recommendation for reducing pollution: case study from Semarang City

Zaman Badrus, Ramadan Bimastyaji Surya, Sarminingsih Anik, Priyambada Ika Bagus, Budihardjo Mochamad Arief

Archives of Environmental Protection

|

2023

|

Vol. 49, no. 4

37--45

EN

Indonesia is one of the largest contributors to global marine litter deposition, given its high population and the largest archipelagic country. The increasing problem of plastic littering has recently attracted the attention of researchers. This study aims to identify marine and macroplastic litter in Semarang City. A field survey was conducted by dividing the beach into 18 sampling grids, each with an area of 1 × 1 m2. A literature survey was also conducted using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) methodology to identify literature that can be used to develop recommendations. The results showed that 6.26–11.16 grams/m2/ day of marine litter and approximately 1.61–4.89 items/m2/day of plastic litter would be deposited on Semarang City beaches. The greatest contributors to macroplastic litter were polypropylene (PP) and low-density polyethylene (LDPE), which should be considered for further intervention. Strategic recommendations were developed based on an in-depth literature survey and best practices in the current field. These also include recommendations that can be used as a reference by policymakers and other stakeholders to reduce marine pollution. The results of this study are expected to provide a multiplier effect on reducing marine pollution for the city.

4

Hydraulic Stability of Fly Ash-Bentonite Mixtures in Landfill Containment System

Budihardjo Mochamad Arief, Syafrudin Syafrudin, Priyambada Ika Bagus, Ramadan Bimastyaji Surya

Journal of Ecological Engineering

|

2021

|

Vol. 22, nr 7

132--141

EN

This study aimed to examine the performance of fly ash mixed materials with bentonite binder (FAB) as a recent low-cost containment system to withstand leachate infiltration. The mixture of fly ash with clay (bentonite) can increase the strength of stability and strengthen cohesion bonds between molecules. Direct shear, falling head, Atterberg limit and specific gravity test have been conducted as a preliminary study to determine the precise mixture composition of fly ash-bentonite (FAB) landfill liners. Some bentonite composition: 0% (FAB0), 15% (FAB15), 20% (FAB20), 25% (FAB25) and 25% – cured with NH4Cl (FAB25s) for 24 hours, which mixed with fly ash, showed the value of shear stability at normal stress reaching 9.5 kNm-2, 15.48 kNm-2, 45.06 kNm-2, 46.26 kNm-2 and 13.67 kNm-2, respectively. It showed that the greater the content of bentonite in the mixture, the higher the shear stress produced. Curing with saline solution can reduce the shear stress of the FAB mixture. The safety test results using Geoslope/W® show that the addition of bentonite will increase bonding between particles, bearing capacity, and shear strength of the material. The largest safety factor of 1.674 obtained from FAB20 material meets the safety standard for short-term slope stability. The use of fly ash material with bentonite is expected to be an alternative landfill liner material.