Chemical Engineering

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Browsing Chemical Engineering by Subject "Adsorption"

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    ADSORPSI LOGAM Fe DENGAN ZEOLIT 4A YANG DISINTESIS DARI FLY ASH SAWIT
    (2012-10-24) Aima, Siti; Zahrina Ida; Zultiniar
    Fe is one of the heavy metals that are harmful if levels exceed the thres hold. This material is often found in waste output streams, both industrial waste and house hold waste. The presence of iron in the water is a thing to watch out for and be considered because of its toxic if it enters in to the human body. To reduce the concentration of these metals Fe, an alternative that can be used is by adsorption process using zeolite 4A synthesized from fly ash of oil palm. The method used in the Fe metal adsorption process is a batch method. This study begins with the equilibrium curve to determine the optimum contact time. Analysis of adsorption results performed by AAS. The parameters used in this study is the initial concentration of 100 ppm, the stirring speed of 150 rpm, a dose of 1 gram of zeolite 4A, the variation in pH of the solution (4, 5, 6, 7 and 8) and temperature (30, 40, 50, 60 and 70°C). Results showed that the time to achieve the equilibrium state for 4 hours, with the highest percentage of adsorbed Fe is 98.0% of 100 ppm metal Fe(II) is used, the optimum operating conditionsare at pH 6 and room temperature (≈ 30oC).
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    KESETIMBANGAN ADSORPSI Cd2+ DENGAN MENGGUNAKAN ZEOLIT TERAKTIVASI
    (2013-07-15) Syaputra, Adhe
    The use and utilization of one of the adsorbents can be used in tackling metal waste Cd2+ is zeolite. The purpose of this research reserve zeoliteactivated at various concentrations and temperatures and study the equilibrium solution Cd2+ Adsorption Cd2+ using activated zeolite and determine equilibrium models. Variables of this study is divided into two independent variables and the variables remain. Cd2+ Solution concentration used was 5 ppm, 10 ppm, 15 ppm, and 20 ppm. Temperature used were 30oC, 40oC and 50oC. Reserve maksimum power in this study occurred at 30oC and 20 ppm concentration is 0,1261, which is the most suitable model of equilibrium is the Langmuir isotherm corrected value of 4,4411 %.
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    MODEL KESETIMBANGAN ADSORPSI TEMBAGA (Cu2+) TERLARUT DALAM AIR MENGGUNAKAN PARTIKEL TRICALCIUM PHOSPHATE SEBAGAI ADSORBEN
    (2013-06-12) Ekasari, Erniwita
    The most dangerous pollution of the waters is a heavy metal waste. One method to reduce the levels of heavy metals are soluble in water by adsorption method. The purpose of this research was to study the effect of concentration and temperature on the absorptive capacity of the adsorbent as well as determine the Cu2+ adsorption equilibrium models using TriCalcium Phosphate. Firstly, 1 g of TriCalcium Phosphate was mixed with 500 mL of Cu2+. Subsequently the Cu2+ solution was stirred during the equilibrium time. The solution was filtered and the concentration of Cu2+ in the liquid was analyzed using AAS. At the initial concentration of Cu2+ 2,703 mg/L (30oC) Qe obtained 1,307 mg/g of adsorbent. When the initial concentration of Cu2+ was increased to 8,452 mg/L and 14,954 mg/L, Qe be 3,432 mg/g of adsorbent and 6,130 mg/g of adsorbent. At 30oC, 40oC and 50oC with Cu2+ concentration of 2,703 mg/L obtained Qe 1,307 mg/g of adsorbent, 1,313 mg/g of adsorbent and 1,318 mg/g of adsorbent. Adsorption mechanism occurred was more dominated by Freundlich isotherm models and types of physical adsorption. Heat of adsorption obtained was 3,163 Kcal/mol.K.
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    PENJERAPAN ION Pb2+ TERLARUT DALAM AIR SINTETIS MENGGUNAKAN PARTIKEL TRICALCIUM PHOSPHATE SEBAGAI ADSORBEN
    (2013-06-12) Yunizar, Fouria; Fadli Ahmad; Sunarno
    Metal pollution of lead (Pb) waters in causes a huge negative impact to human life. One effort to eliminate and minimize the metal content of lead is by the process of adsorption. The objective in the work to study the effect of adsorbate concentration and temperature as well as equilibrium models in the Pb2+ ion adsorption using tricalcium phosphate (TCP) as the adsorbent. Pb2+ solution (3 mg/L, 9 mg/L and 15 mg/L) of 500 mL was added as much as 1 g of TCP into a glass beaker with a stirring speed of 300 rpm at temperature of 30oC, 40oC, 50oC and 60oC. Pb2+ concentration in the liquid metal was analyzed using AAS. The adsorption capacity of Pb2+ (Qe) increases with an increasing at initial concentration Pb2+ (Co). At Co 14,932 mg/L have Qe value of 6.7880 mg/g, then at Co 8.986 mg/L and 2.958 mg/L have Qe value of 4.1435 mg/g and 1.4470 mg/g. And an increase in temperature which causes a decrease in the adsorption capacity (Qe). At temperature of 60°C has a value of Qe 6.2585 mg/g, then at temperature of 30°C has a value of Qe 6.7880 mg/g. The mechanism of Pb2+ ion adsorption on tricalcium phosphate followed Freundlich isotherm model can conclude that a physical adsorption in the values of ΔH is - 8.7706 kcal/mol.K.