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Ruwa Jurai: Jurnal Kesehatan Lingkungan
Published by Poltekkes Kemenkes Tanjung Karang
ISSN : 19786204     EISSN : 27237796     DOI : 10.26630
Core Subject : Health, Social,
Environmental Science Health Professions Public Health
Ruwa Jurai: Jurnal Kesehatan Lingkungan is an open access scientific journal with a blinding review process published by the Department of Environmental Health, Tanjung Karang Health Polytechnic. The Ruwa Jurai: Jurnal Kesehatan Lingkungan aims to publish quality articles in the environmental health and related scientific, as a reference for the development of science and technology, as well as increase public literacy for scientific articles. Ruwa Jurai: Jurnal Kesehatan Lingkungan was first published on June 1, 2007, in a printed version with LIPI ISSN 1978-6204. The editor in chief is Mr. Karbito, SST, M.Kes. Ruwa Jurai: Jurnal Kesehatan Lingkungan changes the Editor Teams and the Reviewers Team. The editor in chief is Mr. Prayudhy Yushananta, SKM, MKM. In the new version, we also changed the appearance, journal templates, and starting to use the Open Journal System (OJS), and added the LIPI e-ISSN number 2723-7796. First issue in online version on Volume 14, No 1, 2020. Since Volume 14, No 1, 2020, all published articles have been indexed on Google Scholar, DOI, One Search, and BASE. This journal contains a script that includes: Environmental Epidemiology Environmental Technology and Engineering Environmental Management and Monitoring Environmental Health Risk Assessment Waste Management and Disposal Water Science and Technology Vektor Rodent Disease Control and Preventing Safety and Occupational Health Food Management and Safety Hygiene and Sanitation Pollution
Arjuna Subject : Kedokteran - Kesehatan Masyarakat, Kesehatan Lingkungan dan Pekerjaan
Articles 6 Documents
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Search results for , issue "vol. 20 no. 2 (2026)" : 6 Documents clear
Effect of Coconut Shell Activated Carbon Adsorbent Media Particle Size on Reducing Iron (Fe) Content in Clean Water in Garut Food Industry, West Java Muhammad Raihanuddin; Kahar Kahar
Ruwa Jurai: Jurnal Kesehatan Lingkungan Vol. 20 No. 2 (2026)
Publisher : Poltekkes Kemenkes Tanjung Karang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26630/rj.v20i2.5263

Abstract

Excessive iron (Fe) concentrations in groundwater remain a major concern in the food industry because they can compromise water quality and lead to noncompliance with regulatory standards. Water quality analysis in a food processing facility showed an Fe concentration of 1.075 mg/L, exceeding the permissible limit of 0.2 mg/L. This study investigated the effect of coconut shell activated carbon particle size on the reduction of Fe levels in groundwater. Coconut shells, an abundant food-industry by-product, were used as a sustainable raw material for the production of activated carbon. A true experimental study with a pretest and posttest design without a control group was conducted. A total of 30 kg of activated carbon was produced and physically activated at 600°C for 1 hour. Three particle sizes (25, 30, and 35-mesh) were applied in filtration columns with a volume of 11,304 cm³. Groundwater samples were collected using the grab sampling method, with six replicates per treatment (18 paired samples). Fe concentrations were determined using Atomic Absorption Spectrophotometry (AAS) according to SNI 6989.4:2009. Data were analyzed descriptively using the Shapiro–Wilk test, One-Way ANOVA, and post hoc analysis. Fe concentrations decreased by 75.1%, 81.6%, and 88.4% with 25- mesh, 30- mesh, and 35-mesh activated carbon, respectively. The 35-mesh treatment achieved the highest removal efficiency. One-Way ANOVA and post hoc tests showed significant differences in Fe removal among the three particle sizes (p < 0.001). Activated carbon particle size significantly affected Fe removal from groundwater, with 35-mesh coconut shell activated carbon exhibiting the highest adsorption efficiency.  
Spatial Distribution of Microplastic Abundance and Characteristics in the Surface Water of the Kahayan River, Central Kalimantan Normila Normila; Resna Maulia; Juni Ramadhani
Ruwa Jurai: Jurnal Kesehatan Lingkungan Vol. 20 No. 2 (2026)
Publisher : Poltekkes Kemenkes Tanjung Karang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26630/rj.v20i2.5539

Abstract

Microplastic contamination in freshwater ecosystems has become a growing environmental concern due to its adverse effects on aquatic ecosystems and human health. The Kahayan River, one of the major rivers in Central Kalimantan, is widely used for water supply, transportation, and fisheries. However, information on the spatial distribution and physical characteristics of microplastics in its urban section remains limited. This study aimed to analyze differences in microplastic abundance among sampling stations and characterize the shape, size, and color of microplastics in the river's surface water. An observational biomonitoring study was conducted at four sampling stations representing different anthropogenic activities. Surface water samples were collected using a plankton net and visually identified under a stereomicroscope. Microplastic abundance among stations was analyzed using Welch's ANOVA, followed by the Games–Howell post hoc test (α = 0.05). Microplastics were detected at all stations, with abundances ranging from 5.80 ± 0.92 to 10.33 ± 1.97 particles/L. Welch's ANOVA revealed significant differences among stations (p = 0.035), while the Games–Howell test identified a significant difference only between Stations T1 and T3 (p = 0.018). Microplastics were predominantly fibers (71.31%), with sizes of 0.501–1.000 mm (35.86%) and transparent particles (51.00%). Their distribution varied among sampling stations rather than following a linear upstream-to-downstream pattern. Microplastic distribution in the Kahayan River is influenced by local environmental conditions at each sampling station. These findings provide baseline information to support microplastic monitoring and freshwater pollution management in the Kahayan River.
Hazard Identification, Risk Assessment and Control for Basic Electronics and Embedded System Design Lab (Case Study: Fablab President University, Indonesia) Yosef Barita Sar Manik; Rivasha Nirmala Viandar Putri; Melani Fera Ayulia; Monica Rumondang Panjaitan; Rosália Anastácia da Costa; Sanlio Gomes
Ruwa Jurai: Jurnal Kesehatan Lingkungan Vol. 20 No. 2 (2026)
Publisher : Poltekkes Kemenkes Tanjung Karang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26630/rj.v20i2.5605

Abstract

Basic Electronics and Embedded System laboratories are vital for technical education but pose understudied occupational hazards. This study systematically identifies, assesses, and controls risks in the Basic Electronics and Embedded System Design Laboratory at Fablab President University using direct observation, interviews, and documentation review. It identified 18 hazards across 8 activities, categorized into 6 types: electrical (most dominant, 7 occurrences), mechanical, fire/explosion, extreme temperature, noise/vibration, and natural hazards especially from energized circuits and high-voltage work. A 4×4 risk matrix revealed 5 High Risk and 2 Extreme Risk scenarios (max value 12 from short circuits), with incidental inspections proving inadequate. Applying the hierarchy of controls LOTO, insulated tools, RCDs, barriers, layout improvements, and training—reduced average risk from 9 to 4.29, eliminating all high/extreme levels. These findings validate proactive HIRAC for enhancing OHS, offering a replicable model for electronics labs.
Determinant of PM2.5 and PM10 Concentrations in Residential Areas of Sungai Pinang and Samarinda Ulu Districts, Samarinda City, Indonesia Aprilianus Reynaldy Nurak; Ayudhia Rachmawati; Rea Ariyanti; Riyan Ningsih; Dewi Novita Hardianti
Ruwa Jurai: Jurnal Kesehatan Lingkungan Vol. 20 No. 2 (2026)
Publisher : Poltekkes Kemenkes Tanjung Karang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26630/rj.v20i2.5618

Abstract

Indoor air quality significantly affects occupants’ health, particularly by increasing the risk of respiratory disorders. This analytical observational study employed a cross-sectional design to examine the relationship between the physical characteristics of house and their surrounding environment and the concentrations of PM2,5 and PM10 particulates in Sungai Pinang and Samarinda Ulu Districts. A total of 151 houses were selected using purposive sampling. The variables investigated included wall condition, ventilation, ceiling condition, type of cooking fuel, occupancy density, and the presence of plants. PM2,5 and PM10 concentrations were measured using a Dust Sampler, and the data were analyzed using univariate and bivariate analyses (Mann-Whitney and Kruskal-Wallis tests). The results showed variations in particulate concentrations between the two study locations. At he first location, the mean PM2,5 and PM10 concentrations were 9 µg/m³ and 52 µg/m³ respectively (temperature 32.15°C; relative humidity 71%). At the second location, the mean concentrations were 12 µg/m³ and 71 µg/m³ (temperature 33.14°C; relative humidity 72%). Most houses had non-permanent walls (72.8%) and ventilation that did not meet the recommended health standards (99.3%). Bivariate analysis indicated that wall conditions was the only variable significantly associated with PM2.5 (p=0.040) and PM10 (p=0.049) concentrations. No statistically significant associations were observed for the other variables. In conclusion, wall condition is an important determinant of indoor particulate concentrations. Improving building quality, particularly wall construction, along with strengthening environmental health education, may help reduce particulate exposure and its associated health risks within the community.
Health Risk Analysis of Formalin Exposure from Sausage Consumption Sold at Harapan Baru Public Market, Samarinda City, East Kalimantan Yulis Tanty; Rahmadi Rahmadi; Rico Fernando A. A; Blego Sedionoto
Ruwa Jurai: Jurnal Kesehatan Lingkungan Vol. 20 No. 2 (2026)
Publisher : Poltekkes Kemenkes Tanjung Karang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26630/rj.v20i2.5704

Abstract

Formalin is a chemical substance prohibited for use as a food additive; however, it is still detected in certain processed food products and may cause adverse health effects following repeated consumptionChildren are more vulnerable because their lower body weight may result in a higher formaldehyde exposure dose per kilogram of body weight than that experienced by adults. This study aimed to assess the non-carcinogenic health risks of formalin exposure through sausage consumption among children and adults at Harapan Baru Public Market, Samarinda City, East Kalimantan. This study employed a quantitative descriptive approach using the Environmental Health Risk Assessment method based on secondary data. The formaldehyde concentration was derived from sausage testing results, with a maximum concentration of 256.1 mg/kg. The analysis included children aged 2.5, 5, and 7.5 years, as well as adults. The parameters included formaldehyde concentration, consumption rate, body weight, exposure frequency of 350 days per year, exposure duration, and a reference dose of 0.2 mg/kg/day. Risk was expressed as the Risk Quotient. Based on an assumed sausage consumption of 25 grams per day for children and 50 grams per day for adults, all groups had Risk Quotient values greater than one. The values were 2.56 for children aged 2.5 years, 2.05 for those aged 5 years, 1.53 for those aged 7.5 years, and 1.03 for adults. Children aged 2.5 years had the highest risk level, highlighting the need for special protection of children as the most vulnerable group. Formalin exposure through sausage consumption may pose non-carcinogenic health risks to all groups analyzed. Food surveillance, regular laboratory testing, product-source tracing, and risk communication should be strengthened. These estimates represent risk characterization and should not be interpreted as safe limits for formalin use in food.
The Effect of Climate Factors and Larvae-Free Index on Dengue Hemorrhagic Fever: A Secondary Data Analysis of Probolinggo City, 2022–2024 Ezzelin Agustita Sari; Irwan Sulistio; Marlik Marlik; Pratiwi Hermiyanti; Syarifah Nurhayati
Ruwa Jurai: Jurnal Kesehatan Lingkungan Vol. 20 No. 2 (2026)
Publisher : Poltekkes Kemenkes Tanjung Karang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26630/rj.v20i2.5713

Abstract

Dengue hemorrhagic fever (DHF) cases in Probolinggo City had fluctuated over the past three years and had shown an upward trend. The number of cases increased by 45.75% in 2022, 4.48% in 2023, and 110.30% in 2024. Climatic conditions could affect the Aedes mosquito population, potentially increasing the incidence of DHF. This study aimed to analyze the influence of climatic factors and ABJ on DHF cases in Probolinggo City. This study used an ecological design and monthly secondary data from January 2022 to December 2024 (n = 36). Data on DHF cases and ABJ were obtained from the Probolinggo City Health Office, while climate factor data were obtained from the BMKG. Data analysis was performed using univariate, bivariate, and multivariate analyses via multiple linear regression with a significance level of 5% (α = 0.05). There were 946 cases of DHF in Probolinggo City from 2022 to 2024, with a peak of 111 cases in May 2024. Partial analysis showed that rainfall (p=0.643) and wind speed (p=0.213) had no significant effect, whereas Humidity (p=0.038), temperature (p=0.003), and ABJ (p=0.002) had a significant effect on DHF cases. Multiple linear regression analysis showed that ABJ, temperature, and Humidity had a significant effect on DHF cases, with a strong correlation coefficient (R = 0.826) and a coefficient of determination of 68.2% (R² = 0.682), with the equation: DHF Cases = −5.512 ABJ + 16.480 Temperature + 1.696 Humidity. DHF cases in Probolinggo City fluctuated, with DHF cases significantly influenced by Humidity, temperature, and ABJ. The results of this study were used to strengthen early warning systems and DHF control planning based on climate factors and to improve ABJ in Probolinggo City.

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