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Program Studi Kimia Fakultas MIPA, Uniiversitas Tadulako Jl. Soekarno-Hatta Km. 9, Tondo Palu, 94117
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KOVALEN: Jurnal Riset Kimia
Published by Universitas Tadulako
ISSN : -     EISSN : 24775398     DOI : https://doi.org/10.22487/kovalen
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry
KOVALEN: Jurnal Riset Kimia is a peer-reviewed journal of chemistry published by the Tadulako University, Indonesia. This journal concern with publishing the original research articles, review articles, and the current issues related to chemistry. Publishing frequency 3 issues per year, in April, August, and December.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 13 Documents
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Search results for , issue "Vol. 2 No. 3 (2016)" : 13 Documents clear
PENGARUH JENIS ASAM ALAMI TERHADAP PENURUNAN KADAR LOGAM BERAT TIMBAL DALAM DAGING IKAN TERI (Stelophorus indicus Sp) ASAL TELUK PALU Yulita Nelin Sipa; Jamaluddin Jamaluddin; Ihwan Ihwan
KOVALEN: Jurnal Riset Kimia Vol. 2 No. 3 (2016)
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

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Abstract

Research on the effect of type natural acid against decline of content heavy metals plumbum in meat anchovy (Stelophorus indicus Sp) origin bay Palu. The purpose of this study was to determine the best type of acid used in dissolving levels of plumbum as heavy metals for 1 hour immersion and to determine the number of levels of heavy metals of lead that can be dissolved during immersion 1 hour. This study begins with a sample digestion using nitric acid, further qualitative test reagents dithizon 0.005% (positive), potassium iodide (positive) and sodium carbonate (postitif). Qualitative results test that showed a positive result then measured in metal content of plumbum  using atomic absorption spectrophotometer (AAS) at λ 283.3 nm. Then soaking using tamarind are 5%, acetic acid 10%, the filtrate pineapple 100%, starfruit 100% and lime 25% for 1 hour at room temperature, after measuring the metal content of plumbum with atomic absorption spectrophotometer (AAS) in λ 283.3. The results show levels of heavy metals plumbum before immersion average of 0.8 mg/kg, the average concentration of heavy metals plumbum after soaking tamarind 5% amounting to 0.787 mg/kg (1.64%), 10% acetic acid at 0.789 mg/kg (1.39%), pineapple filtrate 100% of 0.7882 mg/kg (1.49%), starfruit 100% 0.789 mg/kg (1.39%) and lime 25% of 0.7916 mg/kg (1.06%). Thus tamarind 5% is the best type of acid to reduce levels of plumbum metal in Palu bay anchovy origin.Keywords: Acid, Anchovy (Stelophorus indicus Sp), Content, Plumbum
PENGGUNAAN SELULOSA-DIETILENTRIAMINA SEBAGAI LAPISAN PENGIKAT LOGAM Cu(II) DENGAN METODE GRADIEN DIFUSI DALAM FILM TIPIS Khairuddin Khairuddin; Dwi Juli Puspitasari
KOVALEN: Jurnal Riset Kimia Vol. 2 No. 3 (2016)
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

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Abstract

This researh aims to application of cellulose-diethylenetriamine as a binding layer on the diffusive gradients in thin films method with modification of cellulose with diethylenetriamine. The method of diffusive gradients in thin films in principle uses  a simple instrument such as round plastic with a diameter of 2.5 cm, which is filled with metal binding gel, diffusive gel, and membrane filter of       0.45 µm. The metal ions were diffuse through the membrane filter and diffusive gel according to the Fick's Law I, and then is accumulated in the binding layer gel. Based on the results of FTIR analysis, the formation of the binders of the copper ions at the binding layer of cellulose-dietilentriamina involves amine and hydroxyl functional groups.The results of the application of cellulose- diethylenetriamine using as binding layer with polyacrylamide diffusive gel showed a liniar concentration up to 12 hours of contact time and initial copper ion concentration up to 1000 mg/L. The maximum concentration of copper was obtained at pH 4.Keywords: copper,  cellulose- diethylenetriamine, polyacrylamide gel.
KAJIAN BIOREMEDIASI PADA TANAH TERCEMAR PESTISIDA Dwi Juli Puspitasari; Kahiruddin Khairuddin
KOVALEN: Jurnal Riset Kimia Vol. 2 No. 3 (2016)
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

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Abstract

The use of pesticides to eradicate pests are an integral part in farming system. Pesticides use  to increase production and protect the production of physical defects can also cause pollution on agricultural land. The presence of pesticide residues in soil and agricultural production can cause health problems for human and animals  and even death. To overcome this problem there needs a way to degrade hazardous waste in the  environment by performing the remediation. Remediation is carried out by microorganisms fungi, bacteria and algae known as bioremediation. Bioremediation aims to transform compounds into harmless compounds with the end result are  carbon dioxide, water and biomass cells. The advantages of bioremediation are  environmentally friendly, highly efficient, low cost, can be implemented directly in the field, laboratory and combined with chemical and physical methods.Keywords: bioremediation, soil degradation, pesticides, microorganisms

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