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All Journal Jurnal Periodic Jurusan Kimia UNP
Mawardi Anwar
Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Padang
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology

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Penyerapan Logam Krom dalam Limbah Cair Laboratorium Kimia Menggunakan Adsorben Tanah Napa Mawardi Anwar; Hary Sanjaya; Victoria Frisiananda
Jurnal Periodic Jurusan Kimia UNP Vol 2, No 1 (2013)
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (208.044 KB) | DOI: 10.24036/p.v2i1.1929

Abstract

It has been investigated the adsorbtion of chrom metal in chemistry laboratory liquid waste using tanah napa as an adsorbent. Waste containing chrom metal was pass through a coloum that filled with tanah napa adsorbent. It is studied the use of nitrit acid (HNO3) for regeneration purpose and recovery of chrom metal at various concentration. The result showed that HNO3 at concentration 0.4M was the best for regeneration of Chrom(III) is 78.03% and concentration 0.3M for regeneration of Chrom(VI) is 53.02%. The optimum condition of this method were applied to preconcentration of Chrom in chemistry laboratory liquid waste with HNO3 0.3M. The result show that Chrom found in chemistry laboratory liquid waste which is initially 0.9123 ppm can be preconcentration to 1.7760 ppm with 5x10mL preconcentration.
Optimasi Tanah Napa sebagai Adsorben Ion Logam Kromium (IV) Mawardi Anwar; Rahmi Khairun Nisa
Jurnal Periodic Jurusan Kimia UNP Vol 2, No 1 (2013)
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (294.442 KB) | DOI: 10.24036/p.v2i1.1935

Abstract

A study concerning the determination of the optimum conditions for the adsorption of chromium (VI) by tanah napa adsorbent from Aripan, Solok. Tanah napa containing high silica and alumina are 63.20% and 16.55%, levels of silica and alumina in the tanah napa almost the same levels with natural zeolite, which can be used as adsorbent. In this research studied the influence of various parameters that affect the capacity of tanah napa uptake to Cr(VI), the pH of the solution, the initial concentration of solution, adsorbent particle size, heating temperature adsorbent and eluent flow rate. The results of this study indicate that the optimum pH is 4, the optimum initial concentration of 250 mg/L, while the particle size and adsorbent optimum heating temperature is 850 mm and 125°C, and the optimum flow rate is 20 drops/min. Using the Langmuir adsorption isotherm equation obtained maximum absorption capacity of the tanah napa to Cr(VI) that is equal to 0.911 mg/g.
Co-Authors Hary Sanjaya Rahmi Khairun Nisa Victoria Frisiananda