Pb(II) merupakan salah satu logam yang berbahaya dan dapat memicu berbagai masalah kesehatan kronis. Paparan logam Pb (II) dapat merusak sistem saraf dan kekebalan tubuh manusia, serta menyebabkan kerusakan permanen pada organ tubuh dapat merusak DNA manusia, sehingga berdampak negatif pada kesehatan. Untuk mengatasi hal tersebut, penelitian ini dilakukan untuk mengembangkan komposit CMC-Poliak…
This study aims to develop Student Worksheets (LKPD) based on Project Based Learning (PjBL) on colloid material that meets valid and practical criteria. This research employed a research and development (R&D) approach using the 4D development model, which consists of four main stages: Define, Design, Develop, and Disseminate. The research subjects were involved 11th grade students of SMAN 1 Par…
In learning colligative properties, students often view chemistry and mathematics as two separate disciplines, so that mathematics is only used as a calculation tool to solve quantitative problems. As a result, they tend to memorize formulas without understanding the meaning of the concepts and find it difficult to connect the two disciplines in a meaningful way. Engagement in science and mathe…
The lead (Pb) concentration in andisol soil cultivated with Chinese cabbage (Brassica rapa pekinensis L.) in Talang Pasai Village, Pagar Alam, South Sumatra was analyzed to identify factors influencing its accumulation in agricultural land. The study applied a detailed soil survey method at a scale of 1:2,000 using purposive sampling. Soil samples were collected from five observation points, ea…
The ammonium sulfate plant with a production capacity of 250,000 tons/year is planned to be established in 2035 in Gresik Regency, East Java Province, which is estimated to have an area of 10 hectares. The raw materials are Phosphogypsum (Calcium Dihydrate) and Ammonium Carbonate. The process occurs in a Continuous Stirred Tank Reactor, at a temperature of 45 oC and a pressure of 1 atm. This fa…
An ethylene manufacturing plant with a capacity of 400,000 tons/year is planned to operate in 2029 in Sukatani District, Purwakarta Regency, West Java Province, which is estimated to have an area of 65 ha. The manufacturing process of this compound refers to patent number US12215072B2. The raw material used is ethane. The reaction occurs in a single reactor of the furnace reactor type box heate…
ABSTRACT PRELIMINARY DESIGN OF A CALCIUM CARBONATE PRODUCTION PLANT WITH CAPACITY OF 60,000 TONS/YEAR Scientific Paper in the form of a Undergraduate Thesis, January 2026 Renaldi Indarto and Muhammad Azim; Supervised by Dr. Budi Santoso, S.T, M.T. Department of Chemical Engineering, Faculty of Engineering, Sriwijaya University ABSTRACT This calcium carbonate production plant with a capacity of …
Bisphenol-A manufacturing plant with a production capacity of 10,000 tons/year planned to be established in 2030 in Pandeglang Regency, Banten. With estimated area of 5,072 Ha. The raw materials for making Bisphenol-A are Acetone and Phenol. The manufacturing process for Bisphenol-A refers to Patent EP/2023 3847150 B1 “Process for Producing Bisphenol-A”. The reaction takes place in a reacto…
Bentonite is a layered material that can be modified to improve its physicochemical properties through a pillarization process. This study aims to synthesize Co–Mo bimetals dispersed on Al13-pillared bentonite (BPILC) and analyze the effect of Co-Mo variations on its physicochemical characteristics. The synthesis was carried out through pillarization using Al13 polycation followed by wet impr…
Water pollution caused by synthetic dyes, such as Methylene Blue (MB) and Congo Red (CR), has become a serious environmental issue, necessitating the development of alternative adsorbents that are environmentally friendly and cost-effective. This study aims to investigate the characteristics, adsorption mechanisms, and adsorption performance of petai biomass waste–based adsorbents, namely Dri…
The duku plant (Lansium domesticum Corr.) is a leading horticultural commodity in South Sumatra, but in recent years it has experienced a decline in productivity due to wilt disease caused by the Ceratocystis pathogen. This study aims to evaluate the effectiveness of the compound Acibenzolar-S-Methyl (ASM) as a resistance inducer in suppressing the development of Ceratocystis disease in duku pl…
Lumpur minyak bumi tergolong dalam limbah bahan berbahaya dan beracun (B3) yang dapat mencemari dan merusak lingkungan. Penelitian ini bertujuan untuk mempelajari karakterisasi sampel lumpur minyak bumi yang didapat dari PT Pertamina EP Prabumulih Field. Penelitian ini juga mempelajari pengaruh suhu dan waktu ekstraksi terhadap hasil minyak dengan pelarut toluena kombinasi surfaktan Triton X-10…
Penelitian ini bertujuan untuk mengetahui formulasi pembuatan sabun padat menggunakan Virgin Coconut Oil, ekstrak daun sirsak, dan minyak atsiri kulit jeruk manis (citrus sinensis L.) yang memenuhi standar nasional indonesia. Virgin coconut oil yang dibuat dengan metode enzimatis menghasilkan rendemen sebesar 27,6%. Maserasi daun sirsak menggunakan pelarut etanol 96% menghasilkan rendemen sebes…
Crystal Violet Dye (CVD) is a toxic and persistent cationic dye that poses environmental risks. This study developed a Chitosan-PVA/Ag-CeO₂ composite via an environmentally friendly green synthesis using noni leaf extract (Morinda citrifolia L.). The composite was synthesized by coprecipitation, with chitosan and PVA as biopolymer matrices, Ag as a dopant to enhance photocatalytic and antibac…
This research aims to determine the effect of variations in copper (Cu) concentration on the phytoremediation of kiambang plants (Salvinia molesta). The research method was carried out by measuring the absorbance value of Cu solutions at concentrations of 3 ppm, 6 ppm, 9 ppm, 12 ppm and 15 ppm for 7 days with measurement intervals every 2 days using a UV-Vis spectrophotometer at a wavelength of…
This study aims to determine changes in some characteristics of VCO purified using bentonite adsorbent. The VCO production process was carried out through enzymatic method using papain enzyme to maintain oil quality. Furthermore, the purification process was carried out using various bentonite concentrations (3%, 5%, and 10%) to adsorb residual protein, water, and other impurity compounds. This…
The research area is located under PT's mining business license (IUP). Gorby Putra Utama, in the Rawas Ilir district of North Musi Rawas Regency, South Sumatra. This research aims to identify materials indicated as potentially acid-forming (PAF) and non-acid-forming (NAF), as well as factors influencing the formation of acid mine drainage (AMD) in the research area. This study also aims to desc…
The use of fossil fuels such as coal, petroleum, and natural gas, which have a negative impact on the environment, has encouraged the development of clean and sustainable renewable energy sources, one of which is hydrogen, which can be used as fuel in fuel cells to generate electrical energy. One type of fuel cell that has been widely developed is the Proton Exchange Membrane Fuel Cell (PEMFC),…
Methylene blue is a cationic dye. The reduction of methylene blue dye waste was carried out through an adsorption process. This study was conducted by activating bentonite and synthesizing bentonite/ZnO-GO as an adsorbent to remove methylene blue dye. The composite was synthesized using an ultrasonic method and its performance was evaluated based on variations in pH, concentration, adsorbent ma…
Methylene blue is a dye widely used in the textile industry due to its high photostability; however, its release into aquatic environments poses significant risks to aquatic organisms and human health. In this study, a Bentonite–Fe₃O₄/Graphene Oxide composite was synthesized for the degradation of methylene blue. The synthesis was carried out using ultrasonic-assisted and co-precipitation…
ABSTRACT : Cellulose hydrolysis is the process of breaking down β-1,4 glycosidic bonds into glucose and its derivatives. The cellulose hydrolysis reaction can be accelerated by sulfonated biochar catalysts from oil palm empty fruit bunches (OPEFB) and coconut shells (CS). This study was conducted to determine the effect of temperature and catalytic time variations of sulfonated biochar hydroth…
This development research aims to produce Electronic Student Worksheet products based on Project Based Learning Chemical Laboratory Management that are valid, practical and effective. This research was conducted at the Chemistry Education Study Program of Sriwijaya University with the subject of chemistry education students who took the chemical laboratory management course in the 2024/2025 aca…
This research aims to determine the effect of applying the Problem Based Learning learning model on the learning outcomes of class X students on the Periodic System of Elements material. This research was carried out at SMA Negeri 1 Indralaya in November of the 2024/2025 academic year. The research method used was quasi-experimental with a nonequivalent control group design. The variables in th…
This research aims to produce a Student Worksheet (LKPD) based on Project Based Learning redox material for grade XII high school that is valid, practical, and effective. The research method used is development research with a modified Rowntree development model with Tessmer's formative evaluation. The subject of this study is students of class XII.5 SMA Negeri 6 Prabumulih. The results of the …
This research aims to determine the effect of problem based learning LKPD on student learning outcomes in class X high school atomic structure material. This research was carried out at SMA Negeri 1 Indralaya in the 2023/2024 academic year. The research method used was an experiment with a Quasi Experimental design in the form of a nonequivalent control group design. The sampling technique used…