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<![CDATA[Utilization of Bottom Ash as an Adsorbent for Color and COD Removal for Textile Industry Waste ]]>
<![CDATA[Pricilla Jihan Fadilla]]>;
<![CDATA[Mohamad Rangga Sururi]]>;
<![CDATA[Dyah Marganingrum]]>;
<![CDATA[Mila Dirgawati]]>
<![CDATA[ Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 19, No 1 (2022): March 2022 ]]>
Publisher : <![CDATA[Universitas Diponegoro ]]>
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DOI: 10.14710/presipitasi.v19i1.78-88
<![CDATA[This study investigates the use of bottom ash as an adsorbent with and without chemical activation treatment. This study also determines the effect of pH and stirring speed on the efficiency of bottom ash in the adsorption of color and COD. Bottom ash was ground and sieved by 100 mesh sieves and was activated by hydrochloric acid 2%. The experiments were conducted at pH variations of 6, 8, 10; contact time variations of 30, 60, and 90 minutes; and stirring speeds of 30 and 60 rpm. The most effective adsorption by non-activated adsorbents occurred at the combination of pH six and stirring speed of 60 rpm with the removal efficiency for color 66.30% at a contact time of 90 minutes and for COD 31.55% at a contact time of 30 minutes. While for activated adsorbent, the highest removal for color (77.44%) and COD removal (40.54%) were at pH 6, stirring speed 30 rpm, contact time 30 minutes. The bottom ash was potentially used as an adsorbent for treating wastewater containing high concentrations of color and COD.]]>
<![CDATA[The Determinant of Environmental Disclosure in ASEAN Countries ]]>
<![CDATA[Indah Fajarini Sri Wahyuningrum]]>;
<![CDATA[Lisdiana Safitri]]>;
<![CDATA[Shanty Oktavilia]]>;
<![CDATA[Andryan Setyadharma]]>
<![CDATA[ Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 19, No 1 (2022): March 2022 ]]>
Publisher : <![CDATA[Universitas Diponegoro ]]>
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DOI: 10.14710/presipitasi.v19i1.24-33
<![CDATA[The purpose of this study is to examine the effect of firm size, industry type, profitability, firm age, environmental performance, institutional ownership, and gender diversity on environmental disclosure. The quantity of environmental disclosure is measured using disclosure scoring by giving “1” for items disclosed and “0” for items that are not disclosed. The population used in this study are manufacturing companies listed on the Indonesia Stock Exchange (IDX) and Kuala Lumpur, Stock. Exchange (KLSE) in the year 2019. The sampling technique used was purposive sampling which resulted in 74 companies. The analytical technique used in this research is multiple linear regression analysis using IBM SPSS Statistics version 25. The results of this study indicate that company size, company age, and environmental performance have a significant positive effect on environmental disclosure. The type of industry, profitability, institutional ownership, and gender diversity does not affect environmental disclosure. Based on the study results, it can be concluded that companies that are large in size and mature in age and equipped with ownership of ISO 14001 certification can contribute to making more comprehensive environmental disclosures.]]>
<![CDATA[Study of Desiccation Crack Behavior of Fly Ash - Bentonite (FAB) Composite in Landfill Liner System ]]>
<![CDATA[Eflita Yohana]]>;
<![CDATA[Syafrudin Syafrudin]]>;
<![CDATA[Mochamad Arief Budihardjo]]>;
<![CDATA[Bimastyaji Surya Ramadan]]>;
<![CDATA[Ayudya Izzati Dyah Lantasi]]>;
<![CDATA[Fadel Iqbal Muhammad]]>;
<![CDATA[Natasya Ghinna Humaira]]>
<![CDATA[ Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 19, No 1 (2022): March 2022 ]]>
Publisher : <![CDATA[Universitas Diponegoro ]]>
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DOI: 10.14710/presipitasi.v19i1.68-77
<![CDATA[The addition of bentonite to fly ash can lower the permeability coefficient of the composite landfill liner. Also, the montmorillonite bentonite can bind quite a lot of water molecules during the hydration process. In this study, the effect of mixture, water content, and salinity on the desiccation cracking phenomenon in the bentonite - fly ash mixture as a landfill liner system was investigated by conducting tests such as desiccation test, water content test, and standard proctor and permeability test. The variation in bentonite levels: 0%, 15%, 20%,25% and 25% + 1 N NH4Cl solution. The result shows that the appropriate mixture is fly ash + 15% bentonite with permeability of 4,065 x 10-7. The mixture complies with local regulations where the permeability coefficient of the bottom layer of the landfill should be less than 10–6 cm/s and have a low cracking value (CIF). Furthermore, the addition of saline solution to the composite can rise the value of the optimum moisture content. However, saline conditions can decrease the value of CIF drastically]]>
<![CDATA[Performance of Electrocoagulation Process for Microplastic Fibre Removal from Laundry Wastewater ]]>
<![CDATA[Marita Wulandari]]>;
<![CDATA[Intan Dwi Wahyu Setyorini]]>;
<![CDATA[Anggie Melinda Handayani]]>;
<![CDATA[Ismi Khairunnissa Ariani]]>;
<![CDATA[Ainun Zulfikar]]>
<![CDATA[ Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 19, No 1 (2022): March 2022 ]]>
Publisher : <![CDATA[Universitas Diponegoro ]]>
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DOI: 10.14710/presipitasi.v19i1.34-43
<![CDATA[Laundry wastewater contains not only detergent but also contains fabric fibres and threads. Microplastic fibres have been discovered as a potential source of microplastic fibres in synthetic clothing washed in the environment. To reduce microplastic concentration in wastewater, many approaches have been developed. Electrocoagulation is one of them. Using both synthetic microplastics and laundry wastewater samples, this study examined the performance of electrocoagulation methods to remove microplastics. The flocculation and deposition mechanisms remove microplastic fibre. This research was set up by using a reactor with a volume of 1 L, 60 V of voltage and 60 minutes of contact time. Electrical current of 5A and 10A was applied to remove microplastic fibres during electrocoagulation (EC). The removal efficiency of polyester fibre was 55-68 per cent for 60 minutes with a current of 5A and 42-85 per cent for 60 minutes with a current of 10A. Polyamide fibre removal efficiency in 60 minutes is 53 per cent to 74 per cent at 5A current and 57 per cent to 72 per cent at 10A current. According to this study, it can be concluded that EC can remove microplastic fibre from laundry effluent.]]>
<![CDATA[The Presence of Picnic Space in Domestic Environment when COVID-19 Condition as Improving the Quality of Space and Mental Health ]]>
<![CDATA[Hermin Werdiningsih]]>;
<![CDATA[Indriatjario Soemadyo]]>;
<![CDATA[Arnis Rochma Harani]]>
<![CDATA[ Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 19, No 1 (2022): March 2022 ]]>
Publisher : <![CDATA[Universitas Diponegoro ]]>
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DOI: 10.14710/presipitasi.v19i1.99-107
<![CDATA[The condition of the COVID-19 pandemic since 2020 has shaped changes in daily life, where the use of the living environment has become one of the things that have changed. Activities usually carried out outside the living environment now must be covered in it. In this paper, the domestic environment is understood as where private daily domestic activities usually occur. This paper aims to expand the understanding of picnic space in the domestic environment. Seeing how the picnic space is present in the domestic area has the potential to expand the understanding of space in architecture related to spatial quality. Investigates the relationship between activity and space as the basis for understanding the quality of space in a domestic environment. This paper uses a qualitative method to reveal the various activities and explores how the quality of space in the domestic environment has changed during the COVID-19 pandemic. Data was collected through direct observation, photos, interviews, and further analysis. The study finds that the domestic environment can appear as a picnic space with a relationship between humans and objects or an environment that supports happiness and improves mental health. The emergence of picnic space in the domestic environment occurs through three processes: the relationship between the supporting object, actor, and place, blurring the boundary of virtual and physical, and the relationship between object and atmosphere. The finding can enrich the field of architecture, especially in interpreting space, boundaries, and their relation to the mental health of its users.]]>
<![CDATA[Synthesis, Characterization, and Application of Rubber Fruit Shell as an Adsorbent for Phosphate Removal in Real Grey Water ]]>
<![CDATA[Muhammad Naswir]]>;
<![CDATA[Yudha Gusti Wibowo]]>;
<![CDATA[Winny Laura]]>
<![CDATA[ Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 19, No 1 (2022): March 2022 ]]>
Publisher : <![CDATA[Universitas Diponegoro ]]>
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DOI: 10.14710/presipitasi.v19i1.44-54
<![CDATA[The washing waste from the laundry industry contains phosphate that can pollute the environment. Multiple efforts have been made but have not reached the small to medium-scale laundry industry; this happens because of the high cost of technology. In this paper, the sorption process by rubber fruit shells successfully reduced the pollutants parameter from greywater. This research has succeeded in creating an adsorbent with raw rubber fruit shell waste; studies on manufacturing techniques, adsorbent characteristics, ability to reduce phosphate content, and adsorption isotherm models are well described. This study also promotes the utilization of rubber shell waste that has not been utilized properly. Adsorbents derived from rubber fruit shells reduced phosphate levels by up to 98% by adding 0.5 g of adsorbent to 100 mg/L of phosphate for 60 minutes. The appropriate adsorption isotherm model in this study is the Freundlich isotherm model.]]>
<![CDATA[WEB GIS: The Promotion Model of Ngerangan Tourist Village in Klaten Regency through The Sustainable Rural Tourism Context During The Covid-19 Pandemic ]]>
<![CDATA[Novia Sari Ristianti]]>;
<![CDATA[Nurhadi Bashit]]>;
<![CDATA[Desyta Ulfiana]]>;
<![CDATA[Kurniawan Teguh Martono]]>
<![CDATA[ Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 19, No 1 (2022): March 2022 ]]>
Publisher : <![CDATA[Universitas Diponegoro ]]>
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DOI: 10.14710/presipitasi.v19i1.108-121
<![CDATA[The application of large-scale social restrictions (LSSR) during the Covid 19 pandemic in Indonesia significantly impacted the tourism sector. A Sustainable Rural Tourism model is expected to develop tourist village development during the Covid 19 pandemic through the WEB GIS (Website Geographical Information Systems) approach. It creates smart tourism through tourist information systems integrated with tourist websites. Ngerangan Tourist Village in Klaten Regency is a village where most of the population's economy is dependent on MSME (Micro, Small, and Medium enterprises) and farming activities. The research aims to formulate a tourism promotion model in Ngerangan tourism village through WEB GIS. The method used is quantitative. First, identifying the data needs such as spatial data (tourist attractions, tourist safety routes types, and infrastructure for implementing health protocols) and non-spatial data (information on MSME and virtual tours). Second, designing the tourism promotion system through WEB GIS and third, testing to see the output of the WEB GIS produced. The research output is Web GIS using story maps application contains two spatial information about the Ngerangan tourist village. First, spatial information about tourist attractions includes locations, photos, and descriptions of tourist attractions. Second, spatial information regarding health protocols facilities during the Covid-19 pandemic includes locations, photos, and descriptions of health protocol facilities]]>
<![CDATA[Assessment of Settlement Quality Levels in Balikpapan Kota Subdistrict, Balikpapan, Indonesia ]]>
<![CDATA[Mega Ulimaz]]>;
<![CDATA[Reynaldi Yudha Pratama]]>;
<![CDATA[Ajeng Nugrahaning Dewanti]]>;
<![CDATA[Elin Diyah Syafitri]]>
<![CDATA[ Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 19, No 1 (2022): March 2022 ]]>
Publisher : <![CDATA[Universitas Diponegoro ]]>
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DOI: 10.14710/presipitasi.v19i1.55-67
<![CDATA[Balikpapan is experiencing rapid urbanization and has an essential role in settlement development. One of the strategic issues of settlements in Balikpapan is the settlements that have decreased in quality in residential in urban areas with a mild level of slum. Based on the Balikpapan Spatial Plan, the spatial pattern in the Balikpapan Kota Subdistrict is dominated by the Settlement Area. It can be said that the components of settlements are the components that are planned to support settlement activities. Therefore, it is necessary to assess the quality of settlements in the Settlement Area in the Balikpapan Kota Subdistrict. The analysis was carried out by quantitative descriptive method (scoring method) with the unit of study for each settlement block or neighborhood. The analysis results of the quality of settlements in the Balikpapan Kota Subdistrict tend to have reasonable quality settlements. There were no areas that had poor settlement quality values. In the research area, from 131 neighborhoods, 19 neighborhoods still have a moderate quality of settlements. It is necessary to increase several components to improve the quality of settlements in each block so that all settlements become more liveable.]]>
<![CDATA[Effectiveness of Lead and Cadmium Reduction with Adsorption Method using a Combination of Chitosan and Coffee Grounds (Case Study of Industrial Wastewater PT.X Indonesia) ]]>
<![CDATA[Nisa Nurhidayanti]]>;
<![CDATA[Nur Ilman Ilyas]]>;
<![CDATA[Dhonny Suwazan]]>
<![CDATA[ Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 19, No 1 (2022): March 2022 ]]>
Publisher : <![CDATA[Universitas Diponegoro ]]>
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DOI: 10.14710/presipitasi.v19i1.11-23
<![CDATA[PT. X Indonesia (PXI) is a company engaged in laboratory services in Bekasi Regency. Based on a preliminary study, the concentration of cadmium and lead in wastewater shows that it exceeds the quality standard of PerMenLHK No. P12 of 2020. The presence of cadmium and lead in PXI's wastewater must be resolved immediately to avoid dangerous human activities and polluting the environment. The research was initiated by taking wastewater samples and synthesizing the adsorbent from the combination of chitosan and activated carbon from coffee grounds. The method used in this study is an experimental approach with quantitative descriptive methods based on laboratory data using FT-IR, SEM EDX and AAS instruments. The results showed that chitosan biosorbent and 1.4-gram coffee grounds activated carbon resulted in the highest cadmium metal reduction efficiency of 94.35% and led to a metal reduction efficiency of 90.86%. The results concluded that the adsorbent of chitosan-activated carbon coffee grounds is very effective in reducing cadmium and lead metals in the wastewater of PXI. This research needs to follow up by increasing the mass of activated carbon of coffee grounds to meet quality standards.]]>
<![CDATA[Analysis of Rainwater Harvesting (RWH) Capacity in Leuwigajah Urban-Village, South Cimahi ]]>
<![CDATA[Mariana Marselina]]>;
<![CDATA[Karina Indah Choirunnisa]]>;
<![CDATA[Ery Nuralamsyah]]>;
<![CDATA[Siti Ai Nurhayati]]>
<![CDATA[ Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 19, No 1 (2022): March 2022 ]]>
Publisher : <![CDATA[Universitas Diponegoro ]]>
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DOI: 10.14710/presipitasi.v19i1.122-136
<![CDATA[Leuwigajah Urban-Village is an area belonging to Citarum Watershed. Thus, it has a high potential to experience floods during the rainy season. Meanwhile, the area often experiences drought during the dry season due to high surface runoff and low infiltration. This paper discusses the capacity of RWH needed in N.A. of R.W. 19. It discusses hydrological conditions of the Cimahi watershed by presenting an analysis of rainfall data, land use data, and extreme discharge data, both maximum and minimum extreme discharges. Therefore, the Citarum Harum Community Service team decided to build Rainwater Harvesting (RWH) as a water supply source during the dry season. The RWH was built based on people's water needs 10 years later, from 2022-to 2032. Based on the calculations explained in the Rainwater Storage Module book issued by the Ministry of Public Works and Housing, the volume of RWH needed is 125 m3. However, due to limited land, it was decided to build an RWH with dimensions of 2 m x 2 m x 2 m which can accommodate 8 m3 of water. The water in this RWH can fulfil 6.4% of daily water needs, so it is recommended to be used for emergency purposes or secondary purposes such as agriculture and plantations.]]>
