<p>Sekam padi dan serbuk gergaji kayu jati merupakan bahan berlignoselulosa yang berpotensi sebagai karbon aktif. Penelitian ini bertujuan untuk menentukan pengaruh proses refluks terhadap karakter aktif sekam (RHAC) (TSAC) adsorben. Sekam dikarbonisasi pada suhu 400 °C lalu direfluks menggunakan larutan NaOH 2 N 100 °C. Karbon diimpregnasi dengan rasio karbon:H<sub>3</sub>PO<sub>4</sub> 1:3 (b/b). RHAC/TSAC diaplikasikan menjerap multi ion Fe(II)/Cu(II) diikuti...

Abstract Heavy metal waste can endanger human health and accumulate in rivers or land. metals such as Co(II) be removed minimized using adsorbents activated carbon. The use of carbon from water hyacinth leaves ( Eichhornia crassipes ) has the potential to reduce concentration heavy environment (WHL) have ability adsorp both organic inorganic compounds. This study aims determine appropriate adsorption kinetics isotherm models process (ACWHL). ACWHL produced carbonization at 400°C for an hour...

The demand for a rapid and simple device to monitor the albumin level in human blood urine is urgent due its importance as an early screening tool predict health status. This article proposes new assay by using giant magnetoresistance (GMR) chip that promises method with real-time electrical read-out. bovine serum (BSA) was used model, while Ag-functionalized iron oxide nanoparticles (Ag-IONPs) were magnetic label. To realize system simplicity speed displaying measurement results, coupled...

Nano activated carbon is with nano-sized particles and can be synthesized from cellulose-containing materials such as the Annatto peels. In this study, synthesis of nano peels was carried out in terms activation temperature variations impregnation ratio 50% H3PO4 acid determining characteristics (NAPAC). The method used a 1: 3; 4; 5; 6; 7 (w/w) for 24 hours heating at 400; 500; 600; 700; 800 °C one hour. (NAPAC) characterized by Infrared Spectrophotometer (FTIR), X-ray Diffractometer (XRD),...

Heavy metals Cd2+ is a dangerous pollutant of water and ecological systems if it above the quality standard threshold. Cassava peel has fairly high carbon element content, namely 59,31%, so can be used as an activated to break down ions in water. This research aims determine kinetic modeling adsorption isotherms using CPAC by H3PO4, optimum pH temperature conditions for ion capacity H3PO4. made through carbonization process at 500 °C 1 hour. Next, was impregnated with H3PO4 concentration 30...

Unsur karbon yang cukup tinggi pada kulit singkong membuat peneliti memanfaatkannya sebagai aktif. Tujuan penelitian ini adalah menentukan karakteristik aktif (KASP) berdasarkan konsentrasi H 3 PO 4 dan lama waktu aktivasi suhu 600 °C. Sintesis KASP menggunakan tahap karbonisasi 500 °C, impregnasi karbon: 1:5 (b/b) dengan variasi yaitu 10-50%, °C selama 2 jam. optimal kemudian diaktivasi 1-3 jam Selanjutnya dikarakterisasi FTIR, XRD, SEM-EDX. Morfologi permukaan menunjukkan berongga dominasi...

Daun eceng gondok ( Eichhornia crassipes ) masih terbatas dalam hal pemanfaatannya, namun daun (DEG) berpotensi untuk dibuat menjadi nanokarbon karena memiliki kandungan lignoselulosa yang tinggi. Tujuan dari penelitian ini adalah melakukan optimasi pembuatan nanopartikel karbon aktif DEG dengan variasi suhu dan waktu aktivasi serta karakterisasi didapatkan. Proses dilakukan metode karbonisasi pada 400 °C selama 1 jam. dua cara, yaitu fisika (400 – 800 °C) (30 150 menit), kimia menggunakan H...

Butterfly tree (Kachnar) in Indonesia is only used as ornamental plants garden, park, and roadsides. The seed of was extracted with n-hexane physicochemical properties were determined based on Standard Nasional (SNI) 01-3555-1998 while the oil chemical composition using GC-MS. result showed that yield 57.33±1.14 % (w/w) characteristic include acid value (13.7.8±0.23 mg KOH/g) saponification (153.32±1.85 KOH/g), peroxide (43.51±0.57. KOH/g). butterfly linoleic (28.11 %), palmitic (29.2%),...

Validation of methods is necessary to ensure that the analytical used are appropriate and reliable. In this research, determination validation method inulin content from gembili bulb (Dioscorea esculenta L.). The for determining levels UV-Vis spectrophotometry. Based on results obtained, maximum wavelength 520 nm. analysis in study meets specified requirements. These parameters include equation raw curve y = 0.0045x +0.109 with coefficient 0.9992. accuracy tested using recovery test was...

This study aim is to optimize the condition of conventional and ultrasound assisted extraction inulin from Gembili (Dioscoreaesculenta L.). Optimization was performed using Response Surface Methodology (RSM). Inulin determination done UV-Vis spectrophotometry method which has validated on preliminary study. RSM designed applied Central Composite Design (CCD) 33 three-factor-three-level. Variables optimized were time (X1), solvent sample (water at temperature 50°C) ratio (v/w) (X2) batch...

This study develops a subsurface detection system based on photoacoustic effect. The main parts of the are laser diode as an exciter, standard microphone acoustic detector, and software-based phase sensitive (PSD) method. Artificial defects various depths were made inside alumunium plate object which was painted with acrylic paint to cover defects. difference in thermal diffusivity will cause different amplitudes so they can be used detect Photoacoustic signal this measured by have average...

Pemanfaatan limbah sekam padi (Oryza sativa) yang kurang maksimal di Dusun Glendang, Desa Watuagung, membuat peneliti berupaya untuk memanfaatkan ini sebagai karbon aktif karena komponen senyawa penyusun dan kenaikan harga ekonomisnya. Tujuan dalam penelitian adalah menentukan karakteristik dipengaruhi oleh suhu aktivasi tahap pemrosesan awal menggunakan NaOH. Penelitian dilakukan dengan refluks NaOH pada serbuk padi, rasio impregnasi karbon:H3PO4 30% (1:4, b/b), pemanasan variasi 400°C...

Increasing human needs cause an increase in production on industrial scale and can have impact increasing contamination of the aquatic environment. Efforts to improve water quality be made by removing contaminants using renewable activated carbon originating from agricultural waste such as rice husks teak sawdust. This research aims examine adsorption capacity (RHAC) sawdust (TSAC) a binary mixture Fe(II)/Cu(II) well level selectivity each adsorbent Fe(II) Cu(II) ions. RHAC TSAC are produced...

Air pollution is the biggest environmental threat to global public health and accounts for an estimated million premature deaths each year. With breath, humans can inhale a number of tiny particles that damage lungs, heart brain cause multitude problems. While air problem, it does not proportionally affect entire world. People living in developing countries have greater impact due poor management. There lack affordable long-term operational monitoring systems, leading technological support...

A temperature-dependent micromagnetic study has been conducted to examine the spin dynamics of perpendicularly magnetized nanodot in a thermally induced magnetic switching (TIMS) scheme. The parameters used this represent properties BaFe. impact writing-temperatures below Curie point on magnetization reversal characteristic with three damping levels, which related minimum writing-field as well zero-field-switching probability, were discussed systematically. spins configuration was also...

Waste of tea is still limited in terms utilization, potentially to be made into nanocarbon. In this research, nanocarbon synthesis from the waste through carbonation method using furnace and purification with HNO3 activator substance used H3PO4. The specific objective study was determine optimal levels ratios ortho-phosphoric acid properties characteristics waste. Based on FT-IR spectra, best ortho-phosphate are 50% 1:2 (w/w) XRD analysis showed that activated carbon dregs obtained were C...

The impacts of strengthening magnetic field exposure on combustion performance low-octane fuel have been examined experimentally. test was carried out using a 2-stroke 49 cc engine where the magnetized low (<2 kG). Moreover, molecular behavior also characterized through spectrum tests NIR and UV-Vis spectrophotometers. result this study indicates an exponential decrease consumption against exposure. This can be related to Arrhenius principle. In addition, oxygen in exhaust gas along with...

Humans need water with good quality to fulfill their needs. Water high hardness content will have a bad impact if consumed continuously, so the adsorption method is carried out reduce concentration of Ca2+ and Mg2+ ions. The process uses sugarcane bagasse activated carbon (SBAC) tested sample well in District Jati, Kudus. Synthesis SBAC was conducted H3PO4 30% as an activator at impregnation ratio 1:5 (w/w) temperature 700°C. FTIR result showed that contains O-H, C-H, C=C, C≡C, C-O...

Lignocellulose compounds contained in water hyacinth leaves (WHL) (Eichhornia crassipes) can be used as raw material for the manufacture of activated carbon at a low and renewable rate. The ACWHL adsorbent reducing COD value turbidity levels on laundry waste. purpose this study is to determine best adsorption modelling values waste kinetics isotherm studies effectiveness levels. process making carried out by carbonization 400 °C 1 hour, then using 30% H3PO4 an impregnation ratio 1:4 (w/w) 24...

Batang Eceng Gondok (BEG) ( Eichhornia crassipes ) mengandung senyawa lignoselulosa yang dapat dimanfaatkan sebagai bahan baku pembuatan karbon aktif dengan biaya rendah dan terbarukan. Penggunaan dari BEG adsorben berpotensi menurunkan konsentrasi logam berat, seperti ion Fe(III) Mn(II). Tujuan penelitian ini adalah menentukan pemodelan kinetika isoterm adsorpsi pada Mn(II), serta efisiensi penurunan kadar Mn(II) menggunakan air sumur di desa Guyangan Kabupaten Jepara. Metode sintesis...

The high rice production process results in waste from processing (Oryza sativa), one of which is husk. Rice husk a layer on the has potential as raw material for manufacture activated carbon. This study examines effect activation and carbonization preparation methods carbon (RHAC) surface character RHAC material. Activated can be obtained through two different stages, namely carbonization-activation activation-carbonization. method carried out furnace an hour (T=400 ⁰C). was sample...

Cassava peel is a natural material that still underutilized even though has the potential as an alternative to activated carbon precursors. In synthesis of carbon, impregnation ratio and activation temperature are important factors affect characteristics produced. This study aims determine effect variations in (carbon: H3PO4) on from cassava (CPAC) optimal conditions manufacture CPAC. this study, CPAC was produced by treatment with various ratios 1:5, 1:6, 1:8, 1:10, 1:12 (w/w, carbon: H3PO4...

The purpose of this study was to determine the effect alginate and CaCl2 concentration antioxidant activity betacyanin content restructuring product red dragon fruit, best formulation that produces highest on restructuring. Data were analyzed by 4x2 Factorial Design Randomized Completely Block (RCBD) with 4 replications. As first factor is which are 2 %, 3 % 5 %. second factors calcium cloride (CaCl2 ) 0.5 0.75 while as block time analysis. To test differences between treatments means,...

Genistein is a soy isoflavone that has been known have anticancer properties. The aim of this research to determine the right combination solvents extract isoflavones in rotten tempe and genistein content extraction process by High Performance Liquid Chromatography (HPLC) method. Isoflavone was done using mixture methanol chloroform solutions. extracts obtained will be analysed method genistein. optimum from chloroform:methanol (10:1 v/v) solvent ratio. Where as highest contents 4th day...