STUDI KOPRESIPITASI Zn2+ DAN Co2+ MENGGUNAKAN Al(OH)3 SEBAGAI KOPRESIPITAN

Authors

  • Indang Dewata Jurusan Kimia Universitas Negeri Padang Jln. Prof. Dr. Hamka Air Tawar Padang - Sumatera Barat ÔÇô Indonesia.

DOI:

https://doi.org/10.31958/js.v5i1.79

Abstract

Research of study copresipitation Zn2+┬áusing Al(OH)3┬áas coprecipitant has been done. This study aims to determine the optimum conditions for coprecipitation of Zn2+┬áby Al(OH)3, and influence of foreign ions. This study uses variation pH about 5,0 ÔÇô 10,0 and 6,0 ÔÇô 10,0 for Co2+; ┬ávariation of eluent volume about 8,0 ÔÇô 14,0; variation of concentrated HNO3┬ávolume about 1,0 ÔÇô 5,0; and variation of concentration Cu2+┬áand Ni2+┬áabout 0,8; 1,2; 1,6; 2,0 and 2,4, respectively. Measurement concentration of Zn2+┬áusing Atomic Absorption Spectroscopy (AAS) with wavelength of ┬á213,9 nm Zn2+for 240,7 nm for Co2+. The result showed the optimum conditions occur at pH about 8, 12 mL of eluent and 1 mL of concentrated HNO3┬áwith the absorption capacity of 0,074 mg/g for Zn2+┬áand pH about 8, 12 mL of eluent and 1 mL of concentrated HNO3┬áwith the absorption capacity of 0,0905 mg/g for Co2+. Meanwhile, the presence of foreign ions such as Cu2+┬áhas influenced the coprecipitated Zn where concentration of the coprecipitated Zn decreased with increasing the concentration of foreign ions.

Keywords:  coprecipitation, coprecipitant Al(OH)3, trace metal,  Zn, Co, AAS

Author Biography

Indang Dewata, Jurusan Kimia Universitas Negeri Padang Jln. Prof. Dr. Hamka Air Tawar Padang - Sumatera Barat ÔÇô Indonesia.

Jurusan Kimia Universitas Negeri Padang
Jln. Prof. Dr. Hamka Air Tawar Padang - Sumatera Barat ÔÇô Indonesia.

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Published

2016-09-22

Issue

Vol. 5 No. 1 (2013)

Section

Artikel

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