Nanofiber membranes were synthesized from waste high-impact polystyrene (HIPS) using electrospinning method and then applied as air filtration media. The HIPS precursor solution with the concentration of 20 wt.% was prepared by dissolving into mixture d-limonene DMF solvents. Beaded or fine nanofibers could be achieved adjusting ratio solvents (d-limonene DMF). Using ratios (d-limonene: DMF) 3:1, 1:1, 1:3, it obtained beaded average diameter 272 nm, 937, 621 respectively. From FTIR spectral...

This paper reports on the recycling of expanded polystyrene (EPS) waste to be repurposed as EPS nanofibrous mats for air filtration applications. The were prepared via electrospinning technique. solutions producing made by dissolving in dimethylformamide (DMF) and d-limonene solvents. mixing ratio DMF solvents varied obtain with different surface tension viscosity. As a result, fiber morphology (smooth fiber, wrinkled beaded fiber) diameter ranging from 314 nm 3506 obtained. synthesized...

The environmental concern related to excessive ammonium in water bodies necessitates efficient and cost-effective removal techniques. This study investigated the modification of natural zeolite collected from Tanggamus district Lampung Province, Indonesia, with ethylenediaminetetraacetic acid (EDTA) enhance its performance for adsorption aqueous solution. modified zeolites were characterized using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), N2...

Abstract The detection of ammonia vapor in the air is always challenging and great demand, with main issues are their low sensitivity. In this contribution, we developed a quartz crystal microbalance (QCM) gas sensor to detect using electrospun polyacrylonitrile (PAN) nanofiber mixed citric acid (CA) as its sensing material. nanostructured morphology as‐prepared sensors was confirmed scanning electron microscopy (SEM), while existence CA PAN/CA confirms Fourier transform infrared (FTIR)...

This research explores the potential of locally sourced natural zeolite from Tanggamus District, Indonesia, for removal ammonium shrimp pond wastewater. The study utilizes a comprehensive approach involving desilication modification, batch adsorption experiments, and field-scale application. zeolite, predominantly composed clinoptilolite, undergoes calcination at varying temperatures, with 200°C proving to be optimal enhancing capacity. also highlights efficient use lower dosage 5 g/L,...

Development of nanomaterial research has provided tremendous changes in technological advances.However, theories that have been used for this (bulk material) is not appropriate to explain the behavior materials nanometer size.Therefore, paper we phenomenon size effect metal its electrical conductivity.Theory approach derive mathematical relationship between scale and conductivity.Electrical conductivity curve particle obtained from results formulation solved by simple calculation.Based on...

Nanofibrous membrane has a potential to use in filtration technology with electrospinning as one of the techniques used synthesizing nanofibers. Polyacrylonitrile (PAN) nanofibrous membranes various fibers diameters were electrospun by varying its precursor solution concentration. The average PAN obtained from concentrations 6, 9, 12, and 14 wt% 341, 534, 1274, 2107 nm, respectively. Filtration media for apple juice clarification bilayer-structured made on commercial cellulose microfibrous...

An antibacterial nanofibrous membrane has been successfully synthesized using electrospinning method. Polyacrylonitrile (PAN) was used as the primary material due to its beneficial properties: great spinnability and insolubility in water, allowing potential application water purification. Chitosan composited fiber structure expected inhibit bacterial growth on surface a consequence of biofouling. Various amounts were with following mass ratio PAN/Chitosan: 20/1, 10/1, 5/1. Scanning Electron...

TiO 2 /Styrofoam composite fiber membranes were synthesized by using an electrospinning system for water purification applications. Composite membrane was fabricated from precursor solution prepared dissolving Styrofoam in the mixture of tetrahydrofuran (THF), citronella oil and cajuput oil. The solutions is mixed with powder three variations based on concentration (1:15,1:20 1:40). Textile dye 50 ppm performed as a model waste water. structure morphology each characterized scanning electron...

The focus of this study was the synthesis polystyrene latex (PSL) particles and their diameter control for application aerosol filtration test. Simple emulsion polymerization used as method to produce uniformly spherical PSL particles. ranging from (160 941) nm obtained by controlling reaction parameters during process. were concentration styrene monomer, potassium persulphate initiator, solution temperature. larger initiator increased, analyzed SEM images. higher temperature, resulting...

The degradation of pollutants in a waste water with the aid light as an energy source enabler is one photocatalysis processes. Because textile dye dissolved often used to model water, color becomes major variable indicate clarity after process occured. Therefore, sensitive instrument measure required. This paper reports simple spectrometer using photodiode sensor OPT101 and emitting diode (LED). emitted by LED passes through so that its intensity reduced. Then, receives reduced intensity. In...

The development of filtration technique for water purification has been performed ranging from the conventional to advanced such as coagulation, sedimentation, sand filtration, reverse osmosis and nanofiltration. However, major challenge be addressed in is tendency membrane fouling or clogging. This effect causes a decreasein flux effectiveness filtration. In this study, we reported fabrication poly (acrylonitrile)/PAN nanofiber by electrospinning their application purification. A drum...

Nanofibers membranes were synthesized using electrospinning method for air filtration application. Polyacrylonitrile (PAN) with three different concentrations as the polymeric matrix of nanofibers membrane is used. In aerosol filtration, pressure drop one most important parameters, which determined by characteristics. One parameters that influence characteristics concentration polymer solution, in it will determine diameter fiber. this study, relation between PAN and test was examined. Three...

One of major goals in science education is to assist students developing their interests science.Students' attitudes toward will determine the success this goal.One students' related response development science, technology and scientific issues.Understanding issues an effort prepare for modern life empower make decisions regarding impact lives.This paper describes method improve literacy senior high school by introducing nanofiber how fabricate them using electrospinning tchnique.Exciting...

The amount of glucose in blood human beings should be controlled. excess or deficiency can cause a variety diseases such as diabetes, heart disease, cholesterol and blindness. We report the design development simple spectrometer non-invasive method to determine urine. Note that urine, which is caused by exceeding level from threshold renal system, correlated with since part acid hydrate digestive tract absorbed intestine circulation. Urine containing reacted benedict solution turn affects...

Water quality is very important for the sustainability of a shrimp farm, starting from quantity and harvested influential on good pond water. The water in question parameters such as turbidity, lot or clean dirt pool, pH value that suits your needs ammonia content which usually produced manure. This research designed monitoring control tool ponds integrated automatically through an IoT-based system (Internet Things) using thingspeak application server telegram bots controls. Based results...

Iron sand, a mineral, can be extracted to produce titanium dioxide (TiO2). TiO2 is semiconductor material that commonly used in photocatalytic applications, as well electronics, colour pigments, paint manufacturing, and semiconductors. In this study, was from Banten ilmenite sand using caustic fusion hydrometallurgical methods. The extraction process carried out by varying the mole ratio of NaOH, which 1:0, 1:3, 1:5, temperatures were 700°C 850°C, with time variations 30, 60, 90 min. XRF...

An airflow control system is one of important parts in the scanning mobility particle sizers (SMPS) used field aerosol and air filtration. In this paper, flow that consists an filter, a blower, sensor, controller, computer are reported. A rate adjustment was performed by varying rotation speed blower using pulse width modulation (PWM) technique. The sensor capable measuring up to 20 liters / min measure rate. order keep at certain value rate, proportional-integral-derivative (PID) action...

Since a nanofiber medium on itself is soft and fragile cannot be used alone as air filters. Coating rigid substrate to form composite that can handled readily necessary. Beside improve the filtration efficiency, adding will also save use of nanofibers mat itself. The aim this study evaluate effect thickness performance in aerosol order find optimum increase quality filter. was low cost microfiber non-woven fabric made from polypropylene (PP). composed electrospun polyacrylonitrile (PAN) with...