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. Mariana
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Effect of Process Variables on Cr (IV) Removal from Liquid Waste Using Guava Leaf (Psidium guava) . Mariana; . Hisbullah; Komala Pontas; Ferry Soraya; Purwana Satriyo
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 2, No 2 (2012): Engineering
Publisher : Syiah Kuala University

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Abstract

The removal of Cr(IV) in aqueous solution by Guava Leaf (Psidium Guajava) as a bio-sorbent was experimentally investigated. The experiment was carried out in a batch stirred reactor at room temperature. The effects of certain parameters, such as concentration of bio-sorbent and contact time, were investigated. The removal increased with contact time and concentration of bio-sorbent. The results showed that the contact time is directly proportional to the sorption capacity and the sorption efficiency. The sorption efficiency of Cr (VI) was highest at 5 grams bio-sorbent, while the sorption capacity of Cr (VI) was highest in bio-sorbent 1 gram under current experimental condition. The optimum removal of Cr (VI) using guava leaves occurred while stirring 30 minutes.
Adsorption of Pb (II) Heavy Metals from Wastewater Using Modified Rice Husk as Adsorbent Farid Mulana; Abrar Muslim; Pocut Nurul Alam; . Mariana
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 5, No 1 (2015): Engineering
Publisher : Syiah Kuala University

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Abstract

Pb (II) heavy metal from wastewater as by-product of industrial activity often causes problem to environment. In order to minimize the amount of Pb (II), wastewater was treated in various ways, including adsorption process using adsorbent. Rice husks that containing lignin, cellulose, and hemicellulose are one of potential candidates to be utilized as adsorbent. The purpose of this research is to modify rice husk by using sodium hydroxide and citric acid and to know adsorption capacity and adsorption efficiency of modified rice husk adsorbent on Pb (II) metal uptake from wastewater. To identify substituted groups, analysis samples by using Fourier Transform Infrared was performed and to determine adsorbed amount of Pb (II) into adsorbent an Atomic Adsorption Spectroscopy Method was conducted. The result showed that optimum adsorption capacity and adsorption efficiency was 5.08 mg/g and 84.52%, respectively. These results were obtained on 60 ppm of Pb (II) adsorbate concentration and 0.8 M citric acid concentration for 150 minutes of contact time
Co-Authors . Hisbullah Abrar Muslim FARID MULANA Ferry Soraya Komala Pontas Pocut Nurul Alam Purwana Satriyo