ABSTRACT HR. Soebrantas street is classified as a secondary arterial road that used to service and public distribution activities in the city. Traffic activity at this street will affect the amount of gas pollutant emissions generated from the vehicles. The purpose of this study is to estimate the distribution pattern of carbon monoxide (CO) emissions emitted from vehicles crossing HR. Soe…
ABSTRACT Kepok banana peel (Musa Acuminate) is easily to find in solid waste in Indonesia. One of the uses of the solid waste of Kepok banana peel is that it can be used as a natural coagulant in water treatment. In this study, Kepok banana peels were used as a natural coagulant in the coagulation process to remove Ferric content and color of peat water. Peat water was taken from Rimbo Pan…
ABSTRACT Petroleum contaminated soil processing can be done by adding biochar to the soil. Biochar can affect the microbial population and can act as an adsorbent in the soil, thereby increasing the efficiency of reducing TPH levels. Palm shell has the potential as a raw material for making biochar because it contains cellulose, hemicellulose, and lignin. The purpose of this study was to c…
ABSTRACT Activated carbon is a material containing amorphous carbon which has an internal surface so that it has high adsorption. Activated carbon has the potential to be used as an adsorbent. This study aims to study the efficiency of adsorption of CO gas and particulates in motorcycle emissions by using activated carbon from rubber fruit shells. Activated carbon was prepared by carboniza…
ABSTRACT Soil contamination by heavy metals lead (Pb) and cadmium (Cd) is a form of pollution that is very dangerous for living things. The amount of Pb and Cd heavy metals in the soil that has exceeded the quality standard causes the environment to not be able to carry out cleaning itself, so an alternative processing must be carried out. One of them is the remediation method using biocha…
ABSTRACT Biochar has a large surface area, and a high capacity to absorb heavy metals and can potentially be used to reduce bioavailability and leach of heavy metals as well as organic pollutants in the soil through adsorption. This study aims to determine the effect of adding biochar from rice husks to removal of heavy metals Cd and Pb in contaminated soil. Biochar is made using a pyrolys…
ABSTRACT Adhesive glue is made by hydrolyzing starch to dextrin and then adding NaHCO3 and CH2O. Tapioca flour and cornstarch are easily found starches. This study aims to determine the effect of variations in the weight ratio of tapioca flour and cornstarch in the manufacture of adhesive glue and to determine the physical properties of adhesive glue (pH, moisture content, ash content, and…
ABSTRACT The part of the nipah plant that is widely used by the community is sap. Nipah sap contains high sucrose and is a very applicable material to be processed into nata products. In making nata de nipah, the fermentation process affects the characteristics of the nata produced. The purpose of this study was to see the effect of bean sprouts extract and mass sugar (50 gr, 75 gr, 100 gr…
ABSTRACT Adhesive glue is made by hydrolyzing starch to dextrin and then adding NaHCO3 and CH2O. Tapioca flour and cornstarch are easily found starches. This study aims to determine the effect of variations in the weight ratio of tapioca flour and cornstarch in the manufacture of adhesive glue and to determine the physical properties of adhesive glue (pH, moisture content, ash content, and…
ABSTRACT Palm kernel meal (BIS) is a side product of the processing of palm kernel into palm kernel oil. Palm kernel meal contains cellulose, hemisellulose and lignin. Palm kernel cake contains cellulose, hemicellulose and lignin which can be used as animal feed by fermentation. The objectives to be achieved in this research are the manufacture of animal feed from palm kernel meal and anal…
ABSTRACT Jackfruit or Artocarpus heterophyllus is one of the national fruit plants that grows well in equatorial and subtropical areas. Jackfruit seed flour can be used as an alternative to flour or as a substitute for flour. The purpose of this study was to determine the effect of soaking time variations using Ca(OH)2 solution, and to analyze the characteristics of the resulting jackfruit…
ABSTRACT The mixture of cooking oil and premium has not been widely utilized as a fuel for rose stoves. So far, a vast majority of people use kerosene in rose stoves, however the cost is very expensive. The purpose of this research was to find the alternative fuels in order to replace kerosene for rose stoves. To obtain the best fuel performance, the ratio used cooking oil and premium mixt…
ABSTRACT Aromatherapy candles are an alternative application for inhalation, namely the inhalation of aromatic vapors produced from a few drops of essential oil. The aroma used is coffee essential oil obtained from maceration extraction of Liberika coffee beans with a yield of 19.7 ml and a yield of 2.9% -3.12%. This study aims to see the color, assess the aroma of candles before burning, …
ABSTRACT Extraction is a process of separating a substance based on differences in its solubility in two different insoluble liquids, usually water and the other as an organic solvent. The basic material used in the extraction process this time is betel nut. The extraction process used is soxhletation extraction, which is the process of separating a component contained in a solid by repeat…
ABSTRACT Taro (Colocasia esculenta (L.) Schott) is one of the tubers that are widely grown in Indonesia. Taro tubers are usually used as food. To increase the quality value of taro tubers, processing the taro tubers into flour by drying. Drying is the process of heat transfer from the dryer and water diffusion (mass transfer) of the dried material. This study aims to determine the effect of…
ABSTRACT Taro (Colocasia esculenta (L.) Schott) is one of the tubers that are widely grown in Indonesia. Taro tubers are usually used as food. To increase the quality value of taro tubers, processing the taro tubers into flour by drying. Drying is the process of heat transfer from the dryer and water diffusion (mass transfer) of the dried material. This study aims to determine the effect o…
ABSTRACT Generally, durian seeds are waste in the surrounding environment. The high starch content in durian seeds has the potential to be processed into flour. At the flour manufacturing stage, the drying process affects the characteristics of the flour produced. This study aims to determine the effect of drying temperature variations on the characteristics of durian seed flour in the for…
In general, experimental activities in schools have not focused on sustainable chemistry learning, because experiments were carried out using synthetic materials, although some of them used materials from the environment but only in small amounts. The research that has been carried out includes exploratory research. The object of this research is to focus on natural indicators of acid-base prac…
This study aims to (1) produce Android-based learning media on the subject of chemical bonds (2) determine the feasibility and practicality of the resulting learning media (3) determine the user's response to learning media, if used in the learning process. The method in this research is research and development using the ADDIE development model, which has five stages, namely analysis, design, …
In the all-technological era where technological growth is developing rapidly and dynamically, students are encouraged to be able to follow learning methods according to their times. The use of technology is one of the most important things in its use in the learning process. Therefore, educators must take an important role in conveying knowledge by utilizing technology such as android. This st…