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Konversi
Published by Universitas Lambung Mangkurat
ISSN : 23023686     EISSN : 25413481     DOI : -
Core Subject : Education,
Education
Arjuna Subject : -
Articles 263 Documents
 17   18   19   20   21 
FTIR STUDIES OF THE TEOS/TEVS XEROGEL STRUCTURE USING RAPID THERMAL PROCESSING METHOD Yanti Mawaddah; Linda Suci Wati; Erdina Lulu Atika Rampun; Anna Sumardi; Aptar Eka Lestari; Zaini Lambri Assyaifi; Muthia Elma
Konversi Vol 9, No 2 (2020): Oktober 2020
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v9i2.9391

Abstract

The tetraethyl orthocycate (TEOS) is mainly used as a silica precursor. Silanol content of silica material is the main cause of low hydrostability which led to resulting in poor performance, especially in water treatment. The stronger bond strength formed by incorporating a carbon structure from triethoxy vinyl silane (TEVS). The xerogel fabrication resulted in the composition of TEOS: TEVS: EtOH: HNO3: H2O: NH3 to be 0.9: 0.1: 38: 0.00078: 5: 0.0003.   . The purpose is to study the structure of organosilica xerogel calcined at 350oC, 450oC and 600oC in the Fourier-transform infrared (FTIR) using rapid thermal processing. The deconvolution of FTIR spectra calculated using the Fityk software. The result of the best xerogel peak shows at calcination of 450°C with peak area siloxane of 15.39, silanol of 3.32 and silica carbon of 3.85.
DISOLVED OXYGEN PERFORMANCE IN DEGRADATION OF TOTAL PETROLEUM HYDROCARBONS BY EX SITE ACTIVATED SLUDGE Abubakar Tuhuloula
Konversi Vol 9, No 2 (2020): Oktober 2020
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v9i2.9308

Abstract

Contamination of soil by the activities of exploration, production and disposal of oil waste into the environment causes serious damage to the environmental ecosystem, the target of processing by the activated sludge as a model for remediation of petroleum contaminated site. Optimization of oxygen supply becomes special attention in aerobic bioprocess for optimizing the growth of microorganisms to degrade total petroleum hydrocarbons. Thus, the study was focused on determining the performance of dissolved oxygen in degradation of total petroleum hydrocarbons by ex situ activated sludge. The research used biological methods (bioremediation), with the ratio of contaminated soil to water was 20:80%(w/v) and a soil size 40/50 mesh.  The degradation process was carried out with 15% and 20% (v/v) activated sludge put into the bioreactor slurry with a capacity of 4 liters and stirring was 90 rpm at a temperature of 30oC as well as aeration and nutrient injection into the bioreactor. TPH analysis was measured by the gravimetric method. The results obtained showed that the performance of dissolved oxygen increased well in the bioreactor slurry at 15% (v/v) and 20% (v/v) activated sludge concentrations was 3.31–8.57 mg/L and 3.5–8.21 mg/L respectively, which had an impact on the level of TPH degradation, namely from 18,000 µg/g to 2870 µg/g and 18,000 µg/g to 1970 µg/g during the 49 days remediation period. In general, activated sludge shows good performance throughout the remediation period.
STUDY OF THE UTILIZATION OF PALM OIL INDUSTRY LIQUID WASTE An Nisa Fitria; Vandhie Satyawira Gunawan; Mardiah Mardiah
Konversi Vol 10, No 1 (2021): April 2021
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v10i1.10146

Abstract

Palm oil is one of the plantation crops that have high economic value and is growing rapidly. The wider the area of oil palm plantations in Indonesia, the more palm oil mills will process palm fresh fruit marks and produce waste from processed palm oil, namely solid waste and liquid waste. Each tonne of fresh fruit bunches (FFB) processed at the plant will potentially leave waste of about 23% empty palm oil, 4% wet decanter solid, 6.5% shell, 13% fiber, and 50% liquid waste. This review will discuss the utilization of palm oil mill liquid waste (LCPKS) which is organic material that still contains many benefits such as nutrients, therefore the application of liquid waste is an effort to recycle some of the nutrients (recycling nutrients) which is followed by harvesting fresh fruit bunches (FFB) from oil palm so that it will reduce the cost of fertilization which is classified as very high for oil palm cultivation. During the processing of oil palm fruit into palm oil in the palm oil industry, the remaining process is obtained in the form of liquid waste. If done properly, the liquid waste of the palm oil industry is considerable potential and can increase the added value of waste itself.Keywords: liquid waste industry, palm oil, utilization  
EFFECT OF TEMPERATURE AND CONCENTRATION OF NaOH SOLUTIONS AS INHIBITORS ON IRON CORROSION RATE IN WATER MEDIA Muthia Elma; Nurhalisah Nurhalisah; Afrisa Noor Hidayanti
Konversi Vol 9, No 1 (2020): April 2020
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v9i1.9072

Abstract

Corrosion is a chemical phenomenon that often occurs in iron materials that are exposed or immersed in a medium either liquid or air. As a result of this corrosion is fragility and damage to the object so that the object cannot function properly. The purpose of this research is to prevent or slow down the occurrence of corrosion by adding chemicals called corrosion inhibitors which work by forming a protective layer on the surface of objects in the form of metal or iron.In this study, inhibitors were used in the form of NaOH solution with variations in the concentration of 0.1; 0.5; 1; 1.25; 1,5; 5 and 10 N are dissolved in water media and the iron immersion process is carried out at temperatures of 40, 45, and 50 °C. Soaked iron bars are measured for surface area and volume as well as weighing before and after the immersion process so that the corrosion rate is obtained with various variables used. Based on the research results obtained corrosion rate increases with increasing temperature and the addition of NaOH concentration inhibitors. Optimal temperature and concentration to inhibit the rate of iron corrosion is at an immersion temperature of 45 ° C and a concentration of 0.1 N NaOH with a corrosion rate of 0.084875 mpy.
ANOVA APPLICATION TO ASSESS THE EFFECT OF TEMPERATURE ON VALUE AND YIELD ON LIQUID FUEL FROM HDPE Nurull Fanani; Eky Novianarenti; Erlinda Ningsih; Kartika Udyani; Ari Prayitno; Denny Angga Saputra
Konversi Vol 10, No 1 (2021): April 2021
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v10i1.10340

Abstract

Proper processing to overcome the abundance of plastic waste is needed. Currently, pyrolysis technology is one method that can overcome plastic waste. Pyrolysis is a thermochemical process, which breaks down long alkyl chains into hydrocarbons at high temperatures. This study aims to determine the effect of temperature on yield and heating value using the analysis of variance (ANOVA) method. The pyrolysis of plastic waste is carried out with HDPE plastic material. The pyrolysis process is carried out in a reactor with 50 grams of feed at various temperatures of 500, 550, 600 and 650⁰C. The conclusion that can be drawn from this research is that there is a decrease in yield and calorific value with increasing temperature. The results of the analysis concluded that temperature had an effect on the yield produced and the calorific value of the product. The best yield was obtained at 35.86% and a heating value of 10530.461cal / g at a temperature of 100oC. Based on the results of data analysis using the ANOVA method, it was found that the experimental hypothesis was that temperature had an effect on yield and calorific value.
USE OF PHOSPHORIC ACID AS BIOADSORBENT ACTIVATOR OF KETAPANG LEAVES (Terminalia sp.) TO REDUCE RHODAMINE B CONTAMINANTS Nadya Hasna; Dedy Suprayogi; Abdul Hakim
Konversi Vol 10, No 2 (2021): Oktober 2021
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v10i2.11072

Abstract

Ketapang contains tannin and phenolic compounds which are known to absorb metals and pollutants in the air. The purpose of this study was to determine the effectiveness of the biadsorbent from ketapang leaves (Terminalia sp.) on the adsorption of Rhodamine B dye without activation and with activation by 10% phosphoric acid. The study began with testing the variation of mass, time, and concentration of Rhodamine B by ketapang leaves. Then the adsorption process was carried out using a batch system and the concentration of the filtrate was measured using a UV-Vis spectrophotometer. Followed by the isotherm analysis of Freundlich and Langmuir. The results showed that the bioadsorbent ability of ketapang leaves without activation or with activation by 10% H3PO4 in terms of mass variation, contact time, and Rhodamine B concentration were 300 mg, contact time was 90 & 120 minutes, and Rhodamine B concentration was 10 mg/l. - 30 mg/l. The maximum bioadsorbent capacity of ketapang leaves (Qm) without activation was 3.7037 mg/g, while that of ketapang leaves with phosphoric acid activation was 1.0673 mg/g. The adsorption model used by the ketapang leaf bioadsorbent is the Freundlich isotherm where the R2 value close to 1 is 0.9573.
INVESTIGATION OF THE INFLUENCE OF PARTICLE SIZE OF RICE HUSK ASH AS ADSORBENT FOR MERCURY IN COLUMN ADSORPTION SYSTEM Desi Nurandini; Riani Ayu Lestari; Isna Syauqiah; Ahmad Rizalli; Ryan Rahmatullah
Konversi Vol 10, No 2 (2021): Oktober 2021
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v10i2.11726

Abstract

The presence of heavy metal mercury (Hg2+) in liquid waste has caused serious problems to environmental pollution. One of the most effective method to reduce the levels of heavy metals mercury (Hg2+) in liquid waste is adsorption. Rice husk ash is highly potential to adsorb heavy metals in water because it is a porous material with a high silica content. Therefore, rice husk ash can be used as an adsorbent for heavy metals in liquid waste. The purpose of this study was to determine the level of mercury (Hg2+) that can be adsorbed from the column adsorption process using adsorbent of rice husk ash and to determine the optimum mass of rice husk ash as an adsorbent. The research was conducted using a series of simple adsorption column tools with a circulation time of 120 minutes. While the independent variables were adsorbent particle size of 50, 100, and 200 mesh. Measurement of mercury (Hg2+) levels was carried out on samples before and after treatment with Atomic Absorption Spectrophotometer (AAS). The results showed a significant decrease in Hg2+ levels with the optimum adsorbent particle size of 200 mesh. The value of the adsorbed Hg2+ ion content reached 101.670 mg/L in the adsorption process using adsorbent with 200 mesh particle size . 
PLANNING FOR WASTE COLLECTION AND STORAGE IN NGEPUNG VILLAGE, KEDAMEAN DISTRICT, GRESIK Andika Putra; Yusrianti Yusrianti; Shinfi Wazna A.
Konversi Vol 10, No 2 (2021): Oktober 2021
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v10i2.11080

Abstract

Ngepung Village is a village located in the eastern part of Kedamean District, Gresik Regency with an area of 5.08 km2. Ngepung Village is divided into 3 Hamlets, 5 Rukun Warga (RW), and 14 Rukun Tetangga (RT) consisting of 3493 people. Waste management in Ngepung Village still uses the old paradigm, namely gathering-burning or gathering-wasting. The purpose of this study is to determine the existing condition of waste management in Ngepung Village and to plan waste collection and storage. The research method includes direct measurement of waste generation, interviews, observation and documentation. Determination of sampling using simple random sampling according to SNI 19-3964-1994. Data analysis used quantitative descriptive techniques. The results of the study stated that most of the residents of Ngepung Village used plastic bags as garbage containers. The average value of waste generation in Ngepung Village is 2.05 L/org.day or 0.31 kg/org.day. Meanwhile, the composition of waste is dominated by organic waste of 60.49%. The waste collection plan consists of 2 types of waste containers, namely organic and inorganic containers, with a housing waste container capacity of 25 liters per family, a 70 liter office waste container capacity, 100 liter pesantren waste containers, 30 liter schools, and 25 liter places of worship. Garbage collection is planned to be carried out every 3 days with 3 cycles using 5 units of three-wheeled motorized carts with a capacity of 1.25 m3.
TRANSESTERIFICATION OF BIODIESEL FROM KAPOK SEED OIL (Ceiba pentandra) Nove Kartika Erliyanti; Afida Kartika Sari; Achmad Chumaidi; Rachmad Ramadhan Yogaswara; Erwan Adi Saputro
Konversi Vol 10, No 2 (2021): Oktober 2021
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v10i2.11247

Abstract

The purpose of this study was to determine the effect of KOH concentration and reaction time on the flash point and pour point of biodiesel from kapok seed oil. The biodiesel transesterification process is carried out in a batch reactor equipped with stirrer. The first step in this research is to reduce the free fatty acid content (esterification process). The second step is transesterification of biodiesel from kapok seed oil. The concentrations of KOH used in this research were 0.5, 1.0, 1.5, and 2.0% by weight of the oil and the reaction time were 0.25, 0.5, 1.0, and 1.5 hours. The operating conditions used in this study were a temperature of 60 oC and a pressure of 4 bar. The results showed that the concentration of KOH and reaction time had a significant effect on the flash point and pour point of biodiesel. The best flash point and pour point were obtained at a concentration of 0.5% KOH and a reaction time of 1.5 hours, which were 163 oC and -8 oC.
QUALITY TEST AND PLANNING OF SLUDGE TREATMENT INSTALLATION OF WATER TREATMENT PDAM Indah Listiowati; Abdul Hakim; Shinfi Wazna Auvaria
Konversi Vol 10, No 2 (2021): Oktober 2021
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v10i2.11078

Abstract

Tujuan pada penilitian ini, untuk mengetahui kualitas dan perencanaan pengolahan lumpur instalasi pengolahan air PDAM. Metode yang digunakan mengenai tahapan pengampilan sampel yaitu dengan grab sampling, dan pengambilan dilakukan selama 8 hari. Pengambilan sampel lumpur dilkakukan pada pipa yang didiamkan mengalir selama 30 detik agar didapatkan debit konstan. Analisa untuk uji kualitas lumpur IPA PDAM dilakukan di laboratorium. Hasil dari penelitian mengenai uji kualitas  pada pipa pembuangan lumpur pada unit sedimentasi. Data yang dibutuhkan meliputi data primer, dan sekunder. Hasil dari penelitian ini mengenai uji kualitas lumpur dari instalasi pengolahan air PDAM, memiliki nilai rata-rata pH 7,7, suhu 27°C, kekeruhan >1000 NTU hal ini dikarenakan kualitas air baku yang memiliki kandungana koloid tinggi. Total solid memiliki nilai rata-rata 281.772 mg/L, total suspended solid dengan nilai rata-rata 52.134 mg/L, COD memiliki nilai rata-rata 3.100 mg/L, dan BOD 3,96 mg/L dengan nilai ratarata . Debit rata-rata harian lumpur yang dihasilkan dari instalasi pengolahan air sebesar 145,773 m3/hari. Unit yang direncanakan sesuai dengan kualitas, dan volume yang diketahui maka direncanakan unit pengolahan lumpur meliputi bak pengumpul, gravity thickening, belt filter press, dan bak pengumpul dry cake. Anggaran biaya yang direncanakan untuk perencanaan pengolahan lumpur instalasi pengolahan air sesuai dengan unit yang diperlukan membutuhkan anggaran dana sebesar Rp. 1.037.900.00,00.

Page 19 of 27 | Total Record : 263

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