@phdthesis{digilib68402,
           month = {November},
           title = {STUDI EKSTRAKSI PADAT-CAIR PADA PENENTUAN LOGAM Cr, Cu, DAN Fe DALAM SAMPEL SEDIMEN SUNGAI DI SEKITAR CALON PLTN MURIA},
          school = {UIN SUNAN KALIJAGA YOGYAKARTA},
          author = {NIM.: 04630044 Malawati Riskiah},
            year = {2009},
            note = {Pembimbing : Imelda Fajriati, M.Si. dan Ir. Muzakky, M.Si.},
        keywords = {Ekstraksi Padat-Cair, Logam Berat, Sedimen Sungai, Bom Digesti, SSA, Spektroskopi Inframerah},
             url = {https://digilib.uin-suka.ac.id/id/eprint/68402/},
        abstract = {Solid-liquid extraction was done to determine the presence of Cr, Cu, and
Fe metals in river sediment samples collected from around PLTN Muria, a future
nuclear power plant, i.e. Kancilan, Balong, Suru, Dombang, and Wareng rivers.
Existing heavy metal in waterbody will be precipitated as sediment. Therefore,
this research was focused on river sediment analysis. The aims of this research
were to know the optimal extraction condition including the concentrations of HF
and HNO3, and the extraction time; to know which heavy metal that can be
extracted and measure their concentrations; to know the validity of research
method used in optimal condition; and to know the ability of HF + HNO3 as
solvent in optimal condition compared with HNO3 4N + HCl 0,7N and HCl 0,5N
as solvent.
Optimation of extraction condition was conducted by using the variations
of solvent concentration and extraction time. Solid-liquid extraction using bomb
digestion, Parr 4745 type. Quantitative analysis of heavy metal contained in
samples was performed using Atomic Absorption Spectroscopy (AAS). In the
meantime, analysis of functional groups was performed using Infrared
Spectroscopy.
Interpretation of infrared spectras showed that silanol and siloksan groups
were present in river sediment samples tested. The optimal condition included HF
and HNO3 concentrations were 40\% and 65\%, respectively, and extraction time
was 5 hours. Cr, Cu, and Fe metals could be extracted from all samples in various
concentrations. The metals concentration for one of this research samples, which
was Kancilan river sediment sample, contained 156,832 ppm Cr metal, 55,149
ppm Cu metal, and 25440,000 ppm Fe metal. The method validation of Cr metal
for one of metals this research focus, showed that this research method has good
accuracy rate as high as 99.492\%. Good accuracy was reached when calibration
standard method was used with 3.897\% in percentage, but not when addition
standard method was used, because the percentage was more than 5\% (which is
10.916\%). Based on the metals concentration determination, HF 40\% + HNO3
65\% was the best solvent for Cr and Fe metal extraction, meanwhile HNO3 4N +
HCl 0,7N was the best solvent for Cu metal extraction}
}