Acacia crassicarpa bark is one of the abundant biomass in Riau Province and is used as raw material for adsorbent in powder form in this study to adsorb Pb(II) ions from aqueous solutions. Acacia crassicarpa bark samples were obtained from Industrial Plantation Forests in Pelalawan Regency, Riau Province. The samples were washed with distilled water, dried in the sun for ±7 days, ground, sieve…
Avocado fruit (Persea americana Mill.) has high nutrition such as healthy fats, fiber, vitamin E and vitamin C. Avocado fruit is also thought to contain many secondary metabolite compounds that can act as antioxidants and inhibitors of the α-amylase enzyme. The samples in this study were avocado varieties of mentega and miki varieties in fresh and dried conditions. Secondary metabolites from t…
This study aims to enhance students' understanding of the concept of atomic structure and the periodic system of elements in Grade X at SMA Negeri 4 Pekanbaru by implementing the Process Oriented Guided Inquiry Learning (POGIL) model. The research employed an experimental design with randomly selected control and experimental groups. To assess students' comprehension of atomic structure, pr…
ABSTRACT Bay leaf tea is a herbal drink that has many benefits for human health as an anti-virus, anti-oxidant and can reduce symptoms of hypertension and gout. This study aims to study the effect of temperature variations and drying time in producing simple drugs and to analyze the tea content of bay leaves and compare it with the SNI standard No. 01-3143- 2011. The method used is drying …
ABSTRACT Oyster mushroom baglog waste that is not utilized properly will cause problems such as environmental pollution and can also be a source of pollution for cultivated oyster mushrooms. Making biobriquettes from mushroom baglog waste is an alternative for managing oyster mushroom baglog waste. However, the briquettes produced must also be of good quality, the quality of biobriquettes …
ABSTRACT The rapid development of industry has contributed greatly to economic growth, but has also had a negative impact on the environment, especially in the form of water pollution due to industrial wastewater. One of the common pollutants is methylene blue dye, which is widely used in the textile industry. This substance is toxic, difficult to degrade, and can cause disruption to aquatic e…
ABSTRACT The rapid development of industry has contributed greatly to economic growth, but has also had a negative impact on the environment, especially in the form of water pollution due to industrial wastewater. One of the common pollutants is methylene blue dye, which is widely used in the textile industry. This substance is toxic, difficult to degrade, and can cause disruption to aquatic e…
ABSTRACT Biomass is a fuel that can be used directly or processed first into solid, liquid or gas fuel through a certain process. Liquid smoke produced from the torrefaction process is a condensation liquid that comes from heating biomass without oxygen. The clarification of liquid smoke used as a food preservative must be carried out through a distillation and adsorption process first. The ob…
ABSTRACT Biomass is a fuel that can be used directly or processed first into solid, liquid or gas fuel through a certain process. Liquid smoke produced from the torrefaction process is a condensation liquid that comes from heating biomass without oxygen. The clarification of liquid smoke used as a food preservative must be carried out through a distillation and adsorption process first. The ob…
ABSTRACT Salicylic acid has the chemical structure C7H6O3, is crystalline, white in color, has a sweet taste and is stable in free air. Salicylic acid and its derivatives are chemicals that are quite important in daily use. In the pharmaceutical field, salicylic acid is used as an analgesic, antipyretic, antioxidant, antimicrobial, antiproliferative and cytotoxic agent. In the field of cosmeti…
ABSTRACT The issue of heavy metal contamination in industrial wastewater, particularly ferrous ions (Fe²⁺), poses a serious threat to the environment and human health. One effective and eco-friendly solution is the adsorption method using biomass-based adsorbents. Coffee grounds, an organic waste rich in lignocellulose, show great potential as a raw material for biomass adsorbents. Chemical…
ABSTRACT The issue of heavy metal contamination in industrial wastewater, particularly ferrous ions (Fe²⁺), poses a serious threat to the environment and human health. One effective and eco-friendly solution is the adsorption method using biomass-based adsorbents. Coffee grounds, an organic waste rich in lignocellulose, show great potential as a raw material for biomass adsorbents. Chemical…
ABSTRACT Sodium Silicate is a raw material that is widely used as a filler in the detergent, soap and toothpaste industries. Sodium silicate can be synthesized from silica (SiO2), which can be obtained through an extraction process from materials containing silica such as sand, clear glass bottle waste and fly ash. In this study, the synthesis of sodium silicate was carried out using silic…
ABSTRACT The increasing contamination of heavy metals in water bodies due to industrial activities demands the development of effective and environmentally friendly wastewater treatment methods. This study aims to determine the effect of bed height and flow rate on the adsorption process of iron (Fe²⁺) ions using activated carbon adsorbent derived from bamboo stems and activated with a …
viii The Effect of Bed Height on Iron (Fe²⁺) Ions the Adsorption Process Using Activated Bamboo Stem Charcoal Adsorbent Treated with NaOH Rizky Al Rasyid and Samuel Valentino L.T Basic Laboratory of Process and Plant Operation, Department of Chemical Engineering, Faculty of Engineering, University of Riau
ABSTRACT Methanol is the simplest form of alcohol with the chemical formula CH3OH. Methanol is a colorless, volatile, flammable and poisonous liquid with a special odor. Methanol is an intermediate compound that is used as a raw material for various industries, including the acetic acid, formaldehyde, MTBE, polyvinyl, polyester and DME industries. The Davy-Johnson Matthey process technology is…
ABSTRACT Indonesia's demand for LPG is projected to increase by up to 2.7 times by 2050, with only one-third of the demand met by domestic production. Andaman natural gas, with a feed of 182,249.96 tons/year, is utilized as a raw material to produce 200,000 tons/year of Dimethyl Ether (DME). Methane from Andaman natural gas is converted into synthesis gas (syngas) and subsequently synthesized …
ABSTRACT Propylene is a colorless, flammable, low-viscosity organic compound that is gaseous at room temperature. Propylene is widely used as a raw material in the production of polymers such as polypropylene, which is used in the manufacture of various plastic products. In addition, propylene is also used in the chemical industry as an intermediate in the manufacture of other compounds, such …
ABSTRACT Ethyl acetate is a carboxyl ester with the molecular formula (CH3COOC2H5) or (C4H8O2) and a molecular weight of 88.106 g/mol. Ethyl acetate is a clear liquid and has a boiling point of 77oC. Ethyl acetate is a fairly polar solvent that has the advantages of being volatile, relatively non-toxic, and non-hygroscopic. The location of the Ethyl Acetate Factory with a capacity of 28,000 to…
ABSTRACT Dimethyl formamide is an organic compound in the form of a colorless liquid that can be mixed with water and most organic liquids. DMF is a common solvent used for chemical reactions. There are two types of DMF, namely pure DMF and technical DMF. The difference between these two types of DMF is in their physical properties, where pure DMF is odorless while technical DMF (grade/degrade…