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All Journal Jurnal Teknik Kimia USU

Suhendrayatna

Jurusan Teknik Kimia, Fakultas Teknik, Universitas Syiah Kuala

Author-ID : 4065538

Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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PENGARUH AKTIVASI ADSORBEN BIOMASSA TERHADAP GUGUS HIDROKSIL PADA PROSES ADSORPSI ION LOGAM TIMBAL (Pb) Abdurrahman; Suhendrayatna; Syahiddin DS
Jurnal Teknik Kimia USU Vol. 5 No. 3 (2016): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Lead (Pb) is a very popular and widely metal known by public caused by high use in industries and toxid to living organisms. This research was conducted to investigate the absorption process of Pb ion in synthetic wastewater. The observations focused on the absorption performance by an adsorbent from mixture biomass of palm bunches and rice husk activated with citric acid in various concentrations and observed an increase in the wave number bonding hydroxyl group (OH) after activated with citric acid. Kinetics of adsorption occured at wave number 3200-3600 cm-1 which founded very good performance of hydroxyl groups in the absorption process in that IR spectra area. Pb ion absorption was found the best place on the ratio of biomass (palm bunches: rice husk) 1: 1, which occured 56.70% absorption with initial concentration of 80 ppm. Furthermore, it was found that contact time between adsorbent and metal ions Pb affect to the absorption.

PENURUNAN KADAR LOGAM KADMIUM MENGGUNAKAN ADSORBEN NANO ZEOLIT ALAM ACEH Cut Raziah; Zerlinda Putri; Atika Rahmi Lubis; Sofyana; Zuhra; Suhendrayatna; Sri Mulyati
Jurnal Teknik Kimia USU Vol. 6 No. 1 (2017): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

The presence of Cadmium (Cd) in groundwater is an issue that needs serious handling as it causes problems to human health. The removal of Cadmium (Cd) can be done by various methods such as adsorption, oxidation, filtration, and many more. In this study, the method used was adsorption using Aceh natural zeolite. This process was expected to reduce Cd metal as effectively as possible. The adsorption was conducted by varying contact time, adsorbent dosage, pH and initial concentration of Cd metal. The crystallized Aceh natural zeolite was characterized by X-Ray Fluorescence (XRF) with Si/Al zeolite ratio of 4.36 %. The concentration of Cadmium in water was analyzed by means of Atomic Adsorption Spectrophotometer (AAS) standard AA 630. The results showed that the adsorption of cadmium in water solution by Aceh natural zeolite occurred according to the Freundlich adsorption model. While the adsorption kinetic from the process was found to be a pseudo second order with k2 value of 1.53.

PENYISIHAN ION LOGAM MERKURI (Hg2+) MENGGUNAKAN ADSORBEN BERBAHAN BAKU LIMBAH PERTANIAN DAN GULMA TANAMAN Miftahurrahmah; Suhendrayatna; Muhammad Zaki
Jurnal Teknik Kimia USU Vol. 6 No. 1 (2017): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

This research was conducted to prepare adsorbents from agricultural and weeds waste biomass to remove Hg2+ metal ions from water phase. Water hyacinth biomass (agricultural waste) and rice husk (weed) was cleaned, dried in an oven dryer, and carbonized in a furnace at 500oC for 2 hours. Then, dried carbon was milled to get 100 mesh of size and was followed by activation using 0.5 N NaOH. The adsorption process was conducted by mix 1 gram of activated adsorbent on a 100 ml water containing 3 ppm Hg2+ metal ions at 100 rpm, pH 5, and 30oC. Hg2+ concentration in water phase were analyzed using AAS, Shimadzu AA-6300 for a specified time within a period of 20-100 minutes. This study shows that at the beginning process of adsorption, adsorbent from rice husk has ability to decrease 69.91% concentration of Hg2+ for 20 minutes, while adsorbent from water hyacinth reaches to 94.26%. The characterization results of FTIR spectra and SEM shows that adsorbent from water hyacinth was able to absorb more Hg2+ metal ions in a short time because it has a functional group that was able to bind heavy metals, and also has a random surface structure, compared with the adsorbent from rice husks that has less functional groups with uniform morphology structure

Co-Authors Abdurrahman Atika Rahmi Lubis Cut Raziah Miftahurrahmah Muhammad Zaki Mulyati, Sri Sofyana, Sofyana Syahiddin DS Zerlinda Putri Zuhra

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