Article Per Year (5 Year)
p-Index From 2021 - 2026
0.23
P-Index
This Author published in this journals
All Journal Chemistry Indonesian Journal of Chemical Research
Kapressy, Blessing H
Unknown Affiliation
Biochemistry, Genetics & Molecular Biology Chemistry Engineering Environmental Science

Published : 1 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 1 Documents
Search

 1 
Isolation and Characterization of Humic Acid from Soil Humus from Ahuru Area, Ambon Island, and its Application as Adsorbent for Metal Ions Cu(II) and Pb(II) Male, Yusthinus Thobias; Kapressy, Blessing H; Tanasale, Matheis Matheis Frits Jan David Pieter; Nurwidah, Andi
Indonesian Journal of Chemical Research Vol 13 No 3 (2026): Edition for January 2026
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2026.13-yus

Abstract

Research on the isolation and characterization of humic acid from soil humus in the Ahuru area, Ambon Island, has been conducted. The isolation and purification of humic acid were carried out using an extraction method based on its solubility in a 0.1 M NaOH solution and precipitation in 6 M HCl. Based on the research findings, the humic acid content was determined to be 8.53%. Characterization was performed using an FTIR spectrophotometer to analyze the absorption profile and functional groups present in the isolated humic acid. The characterization results revealed that humic acid contains alcoholic and phenolic OH groups, aromatic C=C, carboxylic C=O, and conjugated alkenes with ketone C=O. The isolated humic acid was then utilized as an adsorbent for Cu(II) and Pb(II) metal ions at an optimum pH of 5, with a contact time of 60 minutes for Cu(II) metal ions and 90 minutes for Pb(II) metal ions. The study results indicated that the adsorption pattern for Cu(II) metal ions followed the Langmuir adsorption isotherm model, with an adsorption capacity of 928.54 mg/g at a concentration of 200 mg/L. Meanwhile, the adsorption capacity of humic acid for Pb(II) metal ions was 795.97 mg/g at a concentration of 200 mg/L.
Co-Authors Nurwidah, Andi Tanasale, Matheis Matheis Frits Jan David Pieter Yusthinus T. Male