UJI TOKSISITAS Zn TOTAL DALAM TANAH SEKITAR INDUSTRI TEKSTIL DI BANTUL YOGYAKARTA TERHADAP TANAMAN SAWI HIJAU (Brassica sinensis L.)
Nurfina Amalia, Suherman, S.Si., M.Sc., Ph.D.; Prof. Drs. Mudasir, M.Eng., Ph.D.
2024 | Skripsi | KIMIA
Uji
toksisitas Zn total dalam tanah sekitar industri tekstil di Bantul, Yogyakarta
terhadap tanaman sawi hijau telah dilakukan. Tujuan dari penelitian ini untuk
mengkaji sifat fisika-kimia dan kandungan logam Zn, mempelajari adsorpsi dan
desorpsi logam Zn, dan mengkaji toksisitas logam Zn dalam tanah sekitar industri
tekstil terhadap pertumbuhan sawi hijau.
Sampel tanah dibagi menjadi tiga
kelompok yang berbeda yaitu titik sampel A, B, dan C berdasarkan tempat
pengambilannya. Sifat fisika-kimia yang dipelajari meliputi kadar air, pH
tanah, kadar abu, karbon organik total, kapasitas tukar kation, serta kandungan
logam Zn dalam tanah. Kapasitas adsorpsi ditentukan dengan proses adsorpsi oleh
sampel tanah pada berbagai variasi dan desorpsi diukur dengan instrumen
spektrofotometer serapan atom. Uji toksisitas dilakukan dengan mengamati
pengaruh tanaman yang ditanam di tanah sekitar industri tekstil.
Hasil penelitian menunjukkan bahwa titik sampel C memiliki kadar logam Zn tertinggi yaitu 116,46 ± 6,03 mg kg-1. Adsorpsi logam Zn oleh seluruh titik sampel tanah mengikuti isotherm Freundlich dengan kapasitas optimum pada konsentrasi larutan standar Zn 100 mg L-1. Sedangkan desorpsi dari semua titik sampel tanah mengalami peningkatan pada konsentrasi asam sitrat 0,5 mol L-1. Hasil uji toksisitas tidak menunjukkan tanda – tanda toksisitas pada tanaman sawi hijau.
Toxicity test of total zinc in soil around textile industry in Bantul Yogyakarta towards mustard green has been carried out. The aims of this research were to analyze the physico-chemical properties and total zinc metal content of soil around the textile industry, to study adsorption and desorption of soil against zinc metal and to investigate the toxicity test of zinc metal in soil around the textile industry against mustard greens.
Soil
samples were divided into three different groups, namely sample points A, B and
C based on the sites of collection. The physico-chemical properties studied
included moisture content, soil pH, ash content, total organic carbon, cation
exchange capacity, and zinc metal content in the soil. Adsorption capacity was
determined by adsorption process of soil samples at various variations and
desorption was measured by atomic absorption spectrophotometer instrument.
Toxicity tests were conducted by observing the effect of plants grown in the
soil around the textile industry.
The
results showed that sample point C had the highest zinc metal content of 116.46
± 6.03 mg kg-1. Zinc metal adsorption by all soil sample points
followed the Freundlich isotherm with optimum capacity at a concentration of
100 mg L-1 Zn standard solution. While the desorption of all soil
sample points increased at a citric acid concentration of 0.5 mol L-1.
Toxicity test results showed no signs of toxicity in mustard green plants.
Kata Kunci : Adsorpsi, desorpsi, logam Zn, uji toksisitas
