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Journal of the Korean Wood science and Technology 2025年第2期53卷 138-151页

作者： Mpapa, Bahidin Laode Wahyudi, Imam Rahayu, Istie Sekartining Yunianti, Andi Detti Forest Product Science and Technology Study Program SPs IPB University Bogor16680 Indonesia Agrotechnology Study Program Faculty of Agriculture Muhammadiyah University of Luwuk Banggai Luwuk94711 Indonesia Department of Forest Products Faculty of Forestry and Environment IPB University Bogor16680 Indonesia Faculty of Forestry Hasanuddin University Makassar90245 Indonesia

Studies on tropical wood formation using the pinning method in fast-growing species, such as red jabon [Anthocephalus macrophyllus (Roxb.) Havil], remain limited. In this study, we aimed to investigate wood formation over a certain period to determine the effect of climate (rainfall and temperature) on xylem formation. Wood formation in red jabon is understood by examining the anatomical structure of wood and new cell formation after pinning. The anatomical structure was observed from day 30 to 360 days after pinning, with sampling conducted at 30-day intervals. All samples show signs of pinning during all observation periods. The pinning canal remained open in the 30-and 60-day periods. The canal began to close in the 90-and 360-day sampling periods. Newly formed cells were first observed between 30 and 60 days at the sides of the canal, and their presence was visible until 360 days. New cells, including vessels, fiber, parenchyma, and ray cells were observed during the observation period. The width of the newly formed xylem was more than 2 cm after 360 days. In conclusion, pinning method is highly effective for monitoring the width of newly formed wood. Rainfall and temperature at the study location supported red jabon wood formation during observation. © 2025 The Korean Society of Wood science & Technology.

关键词： Macroinvertebrates

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Advancements in Geopolymer Concrete for Marine Infrastructure: An Optimization of Performance Considering Workability, Compressive Strength, Capillary Water Absorption, Porosity, and Chloride Migration

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Iranian Journal of science and Technology - Transactions of Civil Engineering 2024年 1-14页

作者： Shahedan, Noor Fifinatasha Hadibarata, Tony Jusoh, Muhammad Noor Hazwan Isia, Ismallianto Bouaissi, Aissa Juwono, Filbert Hilman Nawawi, Natasha Ahmad Kusumaningrum, Hermin Pancasakti Muslim, Abrar Hidayat, Topik Environment Engineering Program Curtin University Malaysia Miri CDT 250 Malaysia School of Engineering University of Plymouth Plymouth PL4 8AA United Kingdom Department of Electrical and Electronic Engineering Xi’an Jiaotong – Liverpool University Suzhou China School of Mechanical Engineering College of Engineering Universiti Teknologi MARA Shah Alam 40450 Malaysia Biotechnology Study Program Department of Biology Faculty of Science and Mathematics Universitas Diponegoro Semarang Indonesia Department of Chemical Engineering Faculty of Engineering Universitas Syiah Kuala Banda Aceh Indonesia Biology Study Program Faculty of Mathematics and Science Education Universitas Pendidikan Indonesia Bandung Indonesia

This research investigates the effectiveness of geopolymer concrete incorporating fly ash in environments rich in chlorides;in contrast to conventional Portland cement concrete (OPC). The study emphasizes essential characteristics such as workability, mechanical strength, capillary water absorption, open porosity, and chloride migration. The experiments demonstrated that geopolymer concrete exhibits a 30% enhancement in slump values, reflecting improved workability, and its compressive strength rose by 14.90–23.94% when compared with OPC. A significant reduction in binder content led to a notable decrease in capillary water absorption, highlighting a positive impact on long-term durability. With time, geopolymer concrete showed a reduction in open porosity and chloride migration coefficient, indicating better resistance to chloride penetration in marine settings. Although these outcomes underscore the potential of geopolymer concrete to improve structural durability, especially in marine infrastructure, additional optimization is required to tackle its relatively higher capillary water absorption and chloride migration during the initial stages. These results contribute to the ongoing investigation of sustainable building materials, offering valuable insights into geopolymer concrete’s ability to endure severe chloride exposure and serve as a durable solution for corrosion management in marine infrastructure. © The Author(s), under exclusive licence to Shiraz University 2024.

关键词： Durability Geopolymer concrete Marine environments Mix design Sustainable construction

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Biosorption of chromium by live and dead cells of Bacillus nitratireducens isolated from textile effluent

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Chemosphere 2024年 359卷 142389页

作者： Imron, Muhammad Fauzul Setiawan, Wahyu Putranto, Trisnadi Widyaleksono Catur Abdullah, Siti Rozaimah Sheikh Kurniawan, Setyo Budi Study Program of Environmental Engineering Department of Biology Faculty of Science and Technology Universitas Airlangga Campus C UNAIR Jalan Mulyorejo Surabaya60115 Indonesia Department of Water Management Faculty of Civil Engineering and Geosciences Delft University of Technology Stevinweg 1 CN Delft2628 Netherlands Study Program of Environmental Science Postgraduate Program Sriwijaya University Palembang30139 Indonesia Department of Chemical and Process Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia UKM Bangi Selangor 43600 Malaysia

Bacillus nitratireducens was isolated from textile effluent and showed high tolerance to chromium (Cr), reaching up to a 1000 mg/L MIC value. This research was aimed at utilizing biosorbents from live and dead cells of B. nitratireducens to remove Cr from an aqueous solution. A batch biosorption test was performed, and mechanisms analysis was approached by an adsorption-desorption test, SEM-EDS, and FTIR analysis. Cr removal by dead cells in 25, 50, and 100 mg/L of Cr were 58.99 ± 0.7%, 69.8 ± 0.2%, and 82.87 ± 0.11%, respectively, while that by live cells was 73.08 ± 1.9%, 80.27 ± 6.33%, and 86.17 ± 1.93%, respectively. Live cells showed significantly higher Cr removal and adsorption capacities as compared to dead cells. In all concentrations, absorption contributed more than adsorption to the Cr removal by both live and dead cells. Absorption of Cr was subjected to occur due to passive mechanisms in dead cells while involving some active mechanisms in live cells. SEM-EDS confirmed the detection of Cr on the cell surface, while FTIR revealed the shifting of some peaks after the biosorption test, suggesting interactions between Cr and functional groups. Further TEM analysis is suggested to be conducted as a future approach to reveal the inner structure of cells and confirm the involvement of absorption mechanisms. © 2024 Elsevier Ltd

关键词： Heavy metals

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Relationship between drought and soil erosion based on the normalized differential water index(NDWI)and revised universal soil loss equation(RUSLE)model

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Regional Sustainability 2024年第4期5卷 133-144页

作者： Muhammad RENDANA Wan Mohd Razi IDRIS Febrinasti ALIA Supli Effendi RAHIM Muhammad YAMIN Muhammad IZZUDIN Department of Chemical Engineering Faculty of EngineeringUniversitas SriwijayaIndralaya30662Indonesia Master Program of Environmental Management Graduate SchoolUniversitas SriwijayaPalembang30139Indonesia Department of Earth Sciences and Environment Faculty of Science and TechnologyUniversiti Kebangsaan MalaysiaBangi43600Malaysia Department of Civil Engineering Faculty of EngineeringUniversitas SriwijayaIndralaya30662Indonesia Master Program of Agricultural Sciences Graduate Study ProgramUniversitas Muhammadiyah PalembangPalembang30263Indonesia Department of Agribusiness Faculty of AgricultureUniversitas SriwijayaIndralaya30662Indonesia Department of Sociology Faculty of Social and Political SciencesUniversitas SriwijayaIndralaya30662Indonesia

The Langat River Basin in Malaysia is vulnerable to soil erosion risks because of its exposure to intensive land use activities and its topography,which primarily consists of steep slopes and mountainous ***,climate change frequently exposes this basin to drought,which negatively affects soil and water ***,recent studies have rarely shown how soil reacts to drought,such as soil ***,the purpose of this study is to evaluate the relationship between drought and soil erosion in the Langat River *** analyzed drought indices using Landsat 8 satellite images in November 2021,and created the normalized differential water index(NDWI)via Landsat 8 data to produce a drought *** used the revised universal soil loss equation(RUSLE)model to predict soil *** verified an association between the NDWI and soil erosion data using a correlation *** results revealed that the southern and northern regions of the study area experienced drought *** predicted an average annual soil erosion of approximately 58.11 t/(hm^(2)·a).Analysis of the association between the NDWI and soil erosion revealed a strong positive correlation,with a Pearson correlation coefficient of *** assumed that the slope length and steepness factor was the primary contributor to soil erosion in the study *** a result,these findings can help authorities plan effective measures to reduce the impacts of drought and soil erosion in the future.

关键词： Drought Soil erosion Normalized differential water index(NDWI) Revised universal soil loss equation(RUSLE) Langat River Basin

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Integrated microalgae culture with food processing waste for wastewater remediation and enhanced biomass productivity

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Chinese Chemical Letters 2023年第2期34卷 636-643页

作者： Angela Paul Peter Kit Wayne Chew Apurav Krishna Koyande Heli Siti Halimatul Munawaroh Amit Bhatnagar Yang Tao Chihe Sun Fubao Sun Zengling Ma Pau Loke Show Department of Chemical and Environmental Engineering Faculty of Science and EngineeringUniversity of Nottingham MalaysiaJalan Broga43500 SemenyihSelangor Darul EhsanMalaysia Zhejiang Provincial Key Laboratory for Subtropical Water Environment and Marine Biological Resources Protection Wenzhou UniversityWenzhou 325035China Study Program of Chemistry Department of Chemistry EducationFaculty of Mathematics and Science EducationUniversitas Pendidikan IndonesiaBandung 40154Indonesia Department of Separation Science LUT School of Engineering ScienceLUT UniversitySammonkatu 12FI 50130MikkeliFinland College of Food Science and Technology Nanjing Agricultural UniversityNanjing 210095China Key Laboratory of Industrial Biotechnology Ministry of EducationSchool of BiotechnologyJiangnan UniversityWuxi 214122China Department of Sustainable Engineering Saveetha School of EngineeringSIMATSChennai 602105India

Waste generation from food manufacturing facilities poses a serious hazard like environmental degradation, water pollution, and land pollution due to its high nutrient composition. Specifically, solid waste(powder) disposal requires additional energy sources in terms of scientific treatment, structured collection, and disposal packaging according to the safety regulation. Thus, this research discusses the viewpoint of integrating food processing waste as an organic carbon source with BG-11 medium for Chlorella vulgaris(FSP-E) growth. The food processing waste powders investigated in this study were obtained from milk, and biscuit manufacturing facilities. The culture medium was modified by combining both BG-11 and food processing waste powders to identify the optimal algal growth and biochemical *** to the microalgae grown in BG-11 alone(IBG), the combination of biscuit waste and IBG produced higher biomass concentration(44%), with increased lipid(11%), protein(20%), and carbohydrate(57%) contents. Chlorella vulgaris was able to uptake nutrients from the culture medium with combination of food processing waste and IBG thus enhancing its growth. The results obtained also indicate that an integrated culture system using food processing waste and synthetic sources can generate energy out of waste by improving the bio-composition of the microalgae biomass.

关键词： Medium contamination Food processing Waste powder Organic medium Waste remediation

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Studies on Chemical Element Analysis of Wood Using Sem Eds in the Area of Teak Wood Formation after Pinning Method

SSRN

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SSRN 2024年

作者： Mpapa, Bahidin Laode Wahyudi, Imam Rahayu, Istie Yunianti, Andi Detti Forest Product Science and Technology Study Program SPs IPB University Bogor16680 Indonesia Agrotechnology Study Program Faculty of Agriculture Muhammadiyah University of Luwuk Banggai Luwuk94711 Indonesia Department of Forest Products Faculty of Forestry and Environment IPB University Bogor16680 Indonesia Faculty of Forestry Hasanuddin University Makassar90245 Indonesia

Teak wood is a valuable wood species. Information on the chemical elements of wood after the application of the pinning method during the wood formation period is still very limited. The pinning method is very helpful for monitoring the formation of wood in tree trunks. Chemical elements in plant cells and tissues are believed to be very helpful in the growth and formation of wood. Using SEM-EDS technology, the chemical elements of wood in the teak wood formation area can be identified. The detected elements were carbon (54.85%), oxygen (43.80%), calcium (0.44%), magnesium (0.32%), potassium (0.31%), and silicon (0.28%). © 2024, The Authors. All rights reserved.

关键词： Wood chemicals

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Investigation of Microplastics in Raw and Processed Water for Unbranded Refilled Drinking Water in Karawang, Indonesia

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SSRN 2025年

作者： Sari, Gina Lova Utami, Marsah Rahmawati Kasasiah, Ahsanal Rohmana, Andini Siti Amethysia, Nur Ridha Cahyaningrum, Putri Sekti Nainggolan, Adinda Melianda Kurniawan, Setyo Budi Study Program of Environmental Engineering Faculty of Engineering Universitas Singaperbangsa Karawang H.S Ronggowaluyo Karawang41361 Indonesia Study Program of Pharmacy Faculty of Health Science Universitas Singaperbangsa Karawang H.S Ronggowaluyo Karawang41361 Indonesia Department of Chemical and Process Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia Selangor UKM Bangi 43600 Malaysia

It is undeniable that microplastics are found in many types of water, including drinking water. This study aims to investigate the presence of microplastics in one of the drinking waters widely used by communities in Indonesia, known as unbranded refilled drinking water. The investigation was conducted at eight unbranded refilled drinking water depots in Karawang, West Java. A total of 2.00 L of raw air and processed water samples were taken from each depot, then prepared by the National Oceanic and Atmospheric Administration, analyzed using an Olympus BX - 41 microscope with a magnification of ten times, and then counted manually. The results showed that raw and processed water in all unbranded refilled drinking water depots contained microplastics with details of 15.50-42.00 particles/L and 6.50-17.50 particles/L, respectively. The dominant microplastics found were fibers and fragments with sizes of 1.00-3.00 mm and less than 1.00 mm. Furthermore, the dominant color of the microplastics was black, indicating that the polymers of microplastics were polyethylene, polypropylene, or polystyrene. This finding has confirmed that refilled drinking water consumed by the community in Indonesia has potentially become one of the main pathways for the entry and accumulation of microplastics into the human body, posing significant health risks. Based on current research, further research is needed to improve water treatment performance to protect public health. © 2025, The Authors. All rights reserved.

关键词： Microplastic

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Rapid Magnesium Estimation and Mapping at Various Forcing Stages of Pineapple Using Vegetation Index from Uav Imagery

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SSRN 2025年

作者： Putra, Aditya Nugraha Sholikah, Dinna Hadi Okiyanto, Dwi Ustiatik, Reni Sudarto, Sudarto Ismail, Mohd Hasmadi Department of Soil Science Faculty of Agriculture Universitas Brawijaya Indonesia Agrotechnology Study Program Faculty of Agriculture Universitas Pembangunan Nasional Veteran Jawa Timur Indonesia Great Giant Pineapple Company Indonesia Department of Forestry Science and Biodiversity Faculty of Forestry and Environment Universiti Putra Malaysia Selangor Serdang43400 Malaysia

The accurate prediction of magnesium (Mg) content in plant biomass is crucial for ensuring optimal nutrient availability for plant growth. Remote sensing techniques have been extensively utilized for Mg mapping;however, precision across all growth stages remains insufficiently addressed. In fruit crops like pineapple, growth dynamics are significantly influenced by the timing of forcing application, necessitating a stage-specific approach for nutrient assessment. This study aims to develop a rapid and precise model for estimating and mapping Mg content in pineapple biomass using multispectral Unmanned Aerial Vehicle (UAV) imagery. UAV-derived images were processed to generate six vegetation indices—NDVI, MSR, SR, GNDVI, RDVI, and mCARI—which were correlated with Mg content across eight forcing stages (F-5, F-4, F-3, F-2, F-1, F0, F+1, and F+2). Field sampling involved 280 observations and 72 validation points, arranged in a completely randomized design on homogeneous land. The analysis revealed that vegetation indices exhibit varying accuracy depending on the forcing stage, with NDVI and SR demonstrating the highest stability in Mg estimation. The model achieved a coefficient of determination (R²) of 0.74, verified through a paired t-test, confirming its reliability. These findings offer valuable insights into soil fertility management and Mg deficiency mitigation, facilitating large-scale agricultural applications. © 2025, The Authors. All rights reserved.

关键词： Unmanned aerial vehicles (UAV)

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Can advanced society 5.0 technology create economic and social value for millennial and generation Z MSMEs in Surabaya, Indonesia? An economic resilience perspective

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Asia Pacific Management Review 2025年

作者： Samputra, Palupi Lindiasari Alfarizi, Muhammad National Resilience Program Study School of Strategic and Global Studies Universitas Indonesia Jl. Salemba Raya No 4 Central Jakarta Indonesia Cluster of Interaction Community Engagement and Social Environment School of Environmental Science University of Indonesia Indonesia

This study aims to analyze the critical influence of advanced technology on the future capabilities of millennial and Gen Z digital micro, small, and medium-sized enterprises (MSMEs) and their contribution to creating economic and social value through entrepreneurial orientation. This study adopts a quantitative approach, focusing on 268 MSME business owners in the millennial generation and Gen Z in Surabaya, which is considered a hub for millennial and Gen Z Indonesians. Respondent data were collected via an online survey and analyzed using partial least square-structural equation modeling. The results show that social media, big data, and the Internet of Things influence the advanced technology business capabilities of millennial and Gen Z MSMEs. Artificial intelligence and blockchain have not yet played significant roles, as these trends are still emerging. Furthermore, the advanced technology business capabilities of millennials and Gen Z MSMEs enhance their entrepreneurial orientation. These MSMEs have become more courageous and better able to identify future opportunities, ultimately creating economic and social value. © 2025 The Authors

关键词： Advanced society 5.0 Business capabilities Millennial-Gen Z MSME Value creation

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Phytoremediation of Mine Acid Water Using Aquatic Plants

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Journal of environmental science and Engineering(A) 2023年第3期12卷 85-91页

作者： Agung Laksana Dedik Budianta Sarno Program Study of Environment Management Post Graduated ProgrammThe University of SriwijayaPalembang 30139South SumateraIndonesia Department of Soil Science Faculty of Agriculturethe University of SriwijayaIndralayaOgan Ilir 30662South SumatraIndonesia Department of Biology Faculty of Mathematics and Natural Sciencethe University of SriwijayaIndralayaOgan Ilir 30662South SumatraIndonesia

One of the impacts resulting from mining process is the occurrence of AMD(Acid Mine Drainage),which is rainwater or groundwater mixed with *** contains specific sulfides in coal,leading to highly acidic water with elevated concentrations of iron and ***,phytoremediation offers a method to enhance specific contaminant levels in various environmental mediums,including soil,sediment,dirt or sludge,groundwater,and surface *** waste treatment approach employs readily applicable,efficient,and effective plant species,such as burhead or Amazon sword,Melati air(Echinodorus palaefolius),Water hyacinth or eceng gondok(Eichhornia crassipes),and globe fimbry or Mendong(Fimbritylis globulosa)which are aquatic plants in South Sumatra with the capacity to absorb heavy ***,this study aims to measure the growth response of each aquatic plant(Echinodorus palaefolius,Eichhornia crassipes,and Fimbritylis globulosa)in each *** also analyzes the amount of heavy metal uptake in the form of Fe and Mn by each aquatic plant(Eichhornia crassipes,Echinodorus palaefolius,and Fimbritylis globulosa)***,it investigates the ability of these plants to facilitate the phytoremediation of AMD using compost derived from OPEFB(Oil Palm Empty Fruit Bunches)to reduce the presence of Fe and Mn *** study employs a bioreactor and encompasses two treatment factors,namely the type of aquatic plants(Echinodorus palaefolius,Eichhornia crassipes,and Fimbritylis globulosa)and the composition comparison between OPEFB compost and *** result shows that the combination of treatments in terms of plant types and media composition yields the highest growth,with a weight of 286.25 g in T2K1 *** involves Eceng gondok and a media composition of compost to limestone in a ratio of 50%to 50%.Moreover,Mendong exhibits the highest absorption of Fe metal,with a value of 0.82 g,followed by Eceng gondok with 0.55 g,while Melati displays th

关键词： AMD phytoremediation OPEFB constructed wetland

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