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HYDROGEOCHEMICAL CHARACTER AND GROUNDWATER POTENTIAL IN TERNATE BASIN, NORTH MALUKU, INDONESIA

Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University 2022年第3期57卷 492-503页

作者： Daud, Kadri Pramoedyo, Henny Afandhi, Aminudin Tama, Ishardita P. Doctoral Program in Environmental Sciences Graduate School Brawijaya University Jl. MT Haryono 169 Malang65145 Indonesia Department of Statistic Faculty of Mathematics and Natural Sciences Brawijaya University Jl Veteran Malang 65145 Indonesia Faculty of Agriculture Brawijaya University Malang Indonesia Department of Industrial Engineering Faculty of Engineering Brawijaya University Jl. Veteran Malang Malang65145 Indonesia

Ternate Basin is located a small volcanic island in the archipelago of North Maluku, Indonesia. This island has very limited water resources and prone to seawater intrusion. This study aims to determine and analyze the distribution of hydrogeological interest points, determine patterns and directions of groundwater flow, and analyze hydrogeochemical quality and groundwater facies. Determination of the free aquifer zone was carried out by geoelectric measurements in 37 points, while the interpretation of confined aquifers was carried out in 17 drill log points. The quality of groundwater was analyzed in the study area, 126 samples were collected and analyzed. The piper diagram was adopted to identify groundwater facies. The determination of groundwater basin with a total recharge of 54,155 million m3/year. The saturated zone of groundwater flow reaches 1.237 million m3/day or 451.712 million m3/year. The quality of groundwater laboratory results indicates that the water from the two aquifer sources is suitable as a source of drinking water with moderate permeability and has met the quality standards. There were three groundwater facies in the study sites consisting of calcium magnesium bicarbonate (C4H4-Ca-MgO12), calcium magnesium chloride (CaCl2-MgCl2) and sodium potassium chloride (NaCL-KCL). Bicarbonate facies type in the groundwater basin indicated localized flow systems. This means the groundwater in the study site has a recharge area close to its groundwater source. Meanwhile, chloride facies type in the groundwater basin indicates a long process of flow pattern and allows the groundwater to interact with seawater or magmatic matters. These results can be used for policymakers to determine the appropriate and accurate location for groundwater exploitation for the public purposes. Determination of the location must be carried out by considering the flow, quantity, and quality of groundwater. © 2022 Science Press. All rights reserved.

关键词： Aquifers

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Geochemistry and the optics of geospatial analysis as a preposition of water quality on a macroscale

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Environmental Science and Pollution Research 2024年第22期31卷 32614-32636页

作者： Lozano, Liliana P. Taleb, Manal F. Abou Ibrahim, Mohamed M. Gonçalves, Janaína O. Neckel, Alcindo Schmitz, Guilherme P. Bodah, Brian William Korcelski, Cleiton Maculan, Laércio Stolfo Silva, Luis F. O. Department of Civil and Environmental Engineering Universidad de La Costa CUC Calle 58 #55-66 Atlántico Barranquilla Colombia Postgraduate Doctoral Program in Society Nature and Development Universidade Federal Do Oeste Do Pará UFOPA Paraná68040-255 Brazil Department of Chemistry College of Science and Humanities in Al-Kharj Prince Sattam Bin Abdulaziz University Al-Kharj11942 Saudi Arabia Department of Chemistry College of Science Taif University Taif21944 Saudi Arabia ATITUS Educação RS Passo Fundo30499070-220 Brazil Universidade Do Minho UMINHO Porto4710-057 Portugal Thaines and Bodah Center for Education and Development 840 South Meadowlark Lane OthelloWA99344 United States Workforce Education & amp Applied Baccalaureate Programs Yakima Valley College South 16 Avenue & Nob Hill Boulevard YakimaWA98902 United States CDLAC—Data Collection Laboratory and Scientific Analysis LTDA Porto Alegre90670-090 Brazil

The water treatment depends exclusively on the identification of residues containing toxic chemical elements accumulated in NPs (nanoparticles), and ultrafine particles sourced from waste piles located at old, abandoned sulfuric acid factories containing phosphogypsum requires global attention. The general objective of this study is to quantify and analyze the hazardous chemical elements present in the leachate of waste from deactivated sulfuric acid factories, coupled in NPs and ultrafine particles, in the port region of the city of Imbituba, Santa Catarina, Brazil. Samples were collected in 2020, 2021, and 2022. Corresponding images from the Sentinel-3B OLCI satellite, taken in the same general vicinity, detected the levels of absorption coefficient of Detritus and Gelbstoff (ADG443_NN) in 443 m−1, chlorophyll-a (CHL_NN (m−3)), and total suspended matter (TSM_NN (g m−3) at 72 points on the marine coast of the port region. The results of inductively coupled plasma atomic-emission spectrometry (ICP-AES) and inductively coupled plasma mass spectrometry (ICP-MS) demonstrate that the leaching occurring in waste piles at the port area of Imbituba was the likely source of hazardous chemical elements (e.g., Mg, Sr, Nd, and Pr) in the environment. These leachates were formed due to the presence of coal pyrite and Fe-acid sulfates in said waste piles. The mobility of hazardous chemical elements potentiates changes in the marine ecosystem, in relation to ADG443_NN (m−1), CHL_NN (m−3), and TSM NN (g m−3), with values greater than 20 g m−3 found in 2021 and 2022. This indicated changes in the natural conditions of the marine ecosystem up to 30 km from the coast in the Atlantic Ocean, justifying public initiatives for water treatment on a global scale. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Nanoparticles

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Potassium oxide rich coconut husk ash for transesterification of Jatropha oil into biodiesel production

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AIP Conference Proceedings 2024年第1期3082卷

作者： Husni Husin Fahrizal Nasution Muhammad Zaki Ahmadi Ahmadi Pocut Nurul Alam Lia Mairiza Azhari Azhari Muhammad Lathiful Yazil Department of Chemical Engineering Faculty of Engineering Universitas Syiah Kuala Banda Aceh 23111 Indonesia Doctoral Program School of Engineering Universitas Syiah Kuala Banda Aceh 23111 Indonesia Department of Chemical Engineering Faculty of Engineering Universitas Malikussaleh Lhokseumawe Indonesia

The conversion of FFA from jatropha oil was synthesis using potassium oxide (K2O) as a catalyst. This study aims to obtain catalyst materials by simply burning coconut husk and investigate the use of the solid catalyst for the transesterification process of jatropha oil into biodiesel production. The ash catalysts were characterized by X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). From the XRD spectrum, it has been observed that the component of the catalyst is a crystalline nature of K2O as an active site. The catalysts derived from coconut husk ash grew into a hexagonal-shaped morphology, as depicted by SEM images. The effects of the methanol-to-oil ratio were studied to obtain maximum biodiesel production. The conversion of jatropha oil into biodiesel achieved 98.6% under the conditions: a reaction temperature of 65 oC, a methanol to jatropha oil molar ratio of 6:1, and a catalyst of 10 wt.%. Utilization of oil coconut husk ash as a solid catalyst for biodiesel production provides a environmentally friendly way of recycling this solid coconut husk waste, significantly reducing its environmental effects and making biodiesel competitive with petroleum diesel.

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Extraction and characteristic of Dioscorea alata mucilage 3

Extraction and characteristic of Dioscorea alata mucilage

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3rd International Conference on Agricultural engineering for Sustainable Agriculture Production, AESAP 2019

作者： Fortuna, D. Mardjan, S.S. Sunarti, T.C. Darmawati, E. Widayati, S.M. Purwanti, N. Doctoral Program in Agricultural Engineering Science Department of Mechanical and Biosystem Engineering Bogor Agricultural University Bogor Indonesia Department of Mechanical and Biosystem Engineering Bogor Agricultural University Bogor Indonesia Department of Agricultural Industry Technology Bogor Agricultural University Bogor Indonesia Bogor Indonesia

Dioscorea alata (DA) mucilage is classified as water-soluble polysaccharides, which has potential as a source of hydrocolloid. This research was conducted to investigate effects of salt types on water to tuber ratio to produce the most optimal mucilage yield. This research was conducted using Completely Randomized Factorial Design 3 x 5. The DA mucilage was extracted using two factors, i.e., types of salt (without salt, sodium chloride, and calcium chloride) and water to tuber ratios (2:1, 4:1, 6:1, 8:1, and 10:1). The results showed that the types of salt significantly affect (P © Published under licence by IOP Publishing Ltd.

关键词： Calcium chloride

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Study of stinging nettle fibers as a reinforcing of composite materials based on its growing region 1

Study of stinging nettle fibers as a reinforcing of composit...

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1st International Conference on Design, Energy, Materials and Manufacture, ICDEMM 2018

作者： Suryawan, I.G.P.A. Suardana, N.P.G. Winaya, I.N.S. Suyasa, I.W.B. Lokantara, I.P. Department of Mechanical Engineering Udayana University Kampus Bukit Jimbaran Bali Indonesia Doctoral Program of Enviromental Science Udayana University Bali Denpasar Indonesia Doctoral Program of Engineering Science Udayana University Bali Denpasar Indonesia

Stinging nettle is a perennial herbaceous plant belonging to the Urticaceae family, In Bali Indonesia called jelatang. This species is considered a weed in intensive agriculture as its fast vegetative growth and high densities enable increased spread and soil coverage. In Tabanan Bali Indonesia several places to grow are in Denbantas altitude 200-500 meters and in Bedugul altitude 1000 -1500 meters above sea level. Nettle fibers are natural fibers that can be utilized as reinforcement for composite materials. Natural fibers have been used worldwide as a potential replacement for glass fiber reinforced composites, over the last few years has been applied in the automotive sector, aircraft interior and interior of the building. Properties of the natural fiber is lighter, easier to handle, not abrasive, and low cost. The objective of this study was to compare the composition and the tensile strength of the fiber nettle based growing areas from Bedugul and Denbantas. The method used is a fiber tensile test equipment, fourier transformer infrared red (FTIR), thermo-gravimetric analysis (TGA) and scanning electron microscope (SEM). From the research of nettle fibers that stinging nettle from Denbantas has a better tensile strength than Bedugul nettle. The TGA test the visible fiber from Denbantas is superior when used as a composite reinforcement. © Published under licence by IOP Publishing Ltd.

关键词： Scanning electron microscopy

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Practical formula to calculate solar factor in Semarang

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AIP Conference Proceedings 2024年第1期2710卷

作者： Lili Kusumawati Erni Setyowati Agus Budi Purnomo Department of Architecture Faculty of Civil Engineering and Planning Trisakti University Jakarta Indonesia Doctoral Program in Architecture and Urban Science Diponegoro University Semarang Indonesia Department of Architecture Faculty of Engineering Diponegoro University Semarang Indonesia

To get the OTTV value, you must first calculate the solar radiation value. Solar radiation occurs as a result of the sun’s heat being exposed to the surface of the building and then goes inside so that the air temperature inside the building gets hotter. The solar factor is one of the elements of solar radiation which is important in determining the overall thermal transfer value for each outer area of a building. The availability of solar factor data in one place is very important to use for building design purposes. Calculating the solar factor is very difficult, moreover, SNI only contains data for the city of Jakarta. There are several ways to calculate the solar factor, with available SNI tables or by laboratory experiments or direct measurements of sunlight. So to make it easier for the designer, we propose to use the rule of thumb formula. The method used is based on local solar factor data, then a radian angle is made from 0 ° -360 °, which results in an ellipse shape in an equation. This paper concludes that the Rule of thumb formula is very helpful for architects in calculating the SF value and can also complete the table in SNI: 2011, which only contains the SF value for the city of Jakarta, meaning that it only applies in Jakarta, so similar research is needed to get the SF value for other cities in Indonesia.

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Impact of leachate on irrigation water quality around TPST Piyungan

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AIP Conference Proceedings 2024年第1期3019卷

作者： Farida Afriani Astuti Syafrudin Indah Susilowati Doctoral Program of Environmental Science Graduate School of University Diponegoro Semarang-Indonesia Environmental Engineering UPN Veteran Yogyakarta Yogyakarta-Indonesia Graduate School of University Diponegoro Semarang-Indonesia

Rubbish is becoming a global environmental issue as the amount of waste generated constantly increases due to the continuous growth in the level of consumption. The previous investigation reported that the existence of waste management facility known as TPST such as Piyungan in Bantul Regency as a facility for managing rubbish can have a positive or negative impact on the environment. This is because the leachate from the waste is suspected to pollute the surrounding irrigation water. Therefore, this study aims to determine the impact of leachate on the quality of irrigation water around TPST Piyungan using field surveys and laboratory tests. The water sample was taken in Sitimulyo, one of the villages affected by TPST Piyungan activities, and in Jambidan village as point control. The physical and chemical parameters of the water sample tested include temperature, pH, COD, BOD, TSS, TDS, Zn, Fe, Cr, Cu, and Pb. This was followed by the evaluation of the Index Pollution raw quality Class IV, as stated in the Governor Regulation of the Special Region of Yogyakarta Number 20 of 2008 to determine the quality status. The results showed that the status of the water sample is in category IV, which fulfills raw quality (good condition), where point 1 has a value of 0.22 and 0.13 for points 2 and 3. This indicated that the irrigation water quality is not affected by the leachate generated from the TPST Piyungan.

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The Effect of Atmospheric Media Variation on Liquid Smoke Characteristics of Torrefied Coffee Beans

SSRN

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SSRN 2022年

作者： Husin, H. Abubakar, Yusya Khairil Faisal Doctoral Program School of Engineering Universitas Syiah Kuala Banda Aceh23111 Indonesia Department of Mechanical Engineering Universitas Malikussaleh Lhokseumawe24352 Indonesia Department of Mechanical Engineering Universitas Syiah Kuala Banda Aceh23111 Indonesia Department of Chemical Engineering Universitas Syiah Kuala Banda Aceh23111 Indonesia Department of Agricultural Product Technology Universitas Syiah Kuala Banda Aceh23111 Indonesia

Pollution and carbon footprints are still issues in the coffee roasting industry. Therefore, torrefaction of coffee beans with volatile condensation and atmospheric media variations can be an alternative to the roasting process. This study aims to determine the effect of the atmospheric media variations on the liquid smoke characteristics resulting from coffee bean torrefaction using Gayo arabica green beans. The test was conducted with a fixed bed torrefier at 235±8°C for 60 minutes with a variety of oxidative air atmospheric media and non-oxidative inert gas (N2 &Ar) at a rate of 1 l/min. The torrefied coffee beans were cooled and removed at a temperature of 50 °C. The volatile gas flowed to the condenser and flash tank, separating the liquid smoke and uncondensed gas. The liquid smoke yield was calculated based on mass data and its characteristics measured in pH, density and viscosity. Furthermore, FTIR and GC-MS methods were used to detect functional groups and the content of the compounds. The results showed that atmospheric media variations caused differences in yield for samples of liquid smoke and air atmospheric of 11.3% > N2 : 9.73% >Ar: 7.32%. Insignificant differences were found in the value of pH, density and viscosity. These were also shown in functional groups and the content of liquid smoke compounds. The difference was between samples using oxidative and non-oxidative gases and in between inert gases. Meanwhile, the variations in atmospheric media, impact differences in the number, type and amount of compound *** and carbon footprints are still issues in the coffee roasting industry. Therefore, torrefaction of coffee beans with volatile condensation and atmospheric media variations can be an alternative to the roasting process. This study aims to determine the effect of the atmospheric media variations on the liquid smoke characteristics resulting from coffee bean torrefaction using Gayo arabica green beans. The test was conducted with

关键词： Inert gases

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Environmentally-responsible corporate: Actions analysis of Latin American pulp and paper industry

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Environmental Challenges 2021年 4卷

作者： Moraes, Douglas M. Silva, Paulo H. Rampasso, Izabela Simon Anholon, Rosley Quelhas, Osvaldo L.G. Farias Filho, José R. Toledo, Roberto F. School of Mechanical Engineering University of Campinas Mendeleyev Street 200 Campinas Brazil PNPD/CAPES Program Doctoral Program in Sustainable Management Systems Federal Fluminense University Passo da Pátria Street 156 Niterói Brazil Master Program in Management Systems and Doctoral Program in Sustainable Management Systems Federal Fluminense University Passo da Pátria Street 156 Niterói Brazil Department of Engineering Federal Fluminense University Passo da Pátria Street 156 Niterói Brazil

This article aims to list environmental practices used by Latin American companies in the pulp and paper industry, to create a list, through a scientific method, that can direct other researchers and managers interested in the subject. The research strategies used were bibliographic research and content analysis. The content analysis used 36 sustainability reports published by Latin American companies in the industry between 2018 and 2019. Although 264 companies were mapped, only 36 of them presented sustainability report possible to be accessed. Through the sample of 36 sustainability reports, 36 sustainable environmental practices were identified that could be grouped into five groups, namely: (1) Reuse of waste, efficiency in the production process and effluents treatment;(2) Preservation and area recovery;(3) Energy efficiency;(4) Initiatives with stakeholders;(5) Control of gas emission. Despite the exploratory nature, the information presented here can be used by managers in the area and researchers interested in improving environmental practices of the pulp and paper industry. © 2021 The Author(s)

关键词： Environmental practices Latin America Pulp and paper industry

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Degradation of Formaldehyde Using a Mixture of Zn or Sn-Doped Tio2 and Zeolite Synthesized from Waste

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SSRN 2023年

作者： Chang, Yu-Chi Chou, Feng-Chih Huang, Sz-Ping Chen, Ku-Fan Lin, Yuan-Chung Institute of Environmental Engineering National Sun Yat-Sen University Kaohsiung804 Taiwan Center for Emerging Contaminants Research National Sun Yat-Sen University Kaohsiung804 Taiwan Department of Civil Engineering National Chi Nan University Puli Nantou545 Taiwan Department of Public Health College of Health Science Kaohsiung Medical University Kaohsiung City807 Taiwan Doctoral Degree Program in Toxicology College of Pharmacy Kaohsiung Medical University Kaohsiung807 Taiwan

ormaldehyde (HCHO) is a significant volatile organic compound (VOC) commonly found in indoor air, leading to serious health implications upon exposure. This study investigates the photocatalytic degradation of formaldehyde using Zn or Sn-doped TiO2 as the photocatalyst. Microwave system is used not only for synthesizing aluminum slag and glass but for doping Sn and Zn into zeolite. The results showed that P25-TiO2 nanoparticles annealed at 400°C exhibited a higher intensity of anatase peaks, while TiO2 doped with 0.5 mol% Zn and Sn and annealed at 400°C showed stronger anatase peaks in the XRD patterns. SEM images displayed a surface morphology with fine flakes and flower-like structures after annealing at 400°C for Zn and Sn-doped TiO2, respectively. Photoluminescence analysis indicated that 0.5 mol% Zn-doped TiO2 exhibited a greater red shift and lower intensity. Among the various samples, TiO2 doped with 0.5 mol% Zn demonstrated the optimal photocatalytic efficiency for formaldehyde degradation, achieving the highest degradation efficiency of 75% within 40 minutes. 0.5 mol% Zn-doped TiO2 can effectively enhance the photocatalytic performance and degradation efficiency of formaldehyde due to reducing recombination centers. The hydroxycancrinite mixed TiO2 doped with 0.5 mol% Zn exhibited an increased specific surface area of 95.5 m2 g−1. Under visible light, formaldehyde degradation reached saturation within 20 minutes, resulting in an efficiency of 20.1%. Both photodegradation and adsorption was used for formaldehyde degradation. The study provides the development of efficient materials for indoor air treatment and pollutant degradation. © 2023, The Authors. All rights reserved.

关键词： Titanium dioxide

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