The purpose of this research is to identify and characterize the main and trace metals in plant (cassava leaves and grass) and soil. Results of the characterization was used to determine the transfer factor (TF) of metal absorption from soil to plant around Adipala power plant located in Cilacap Regency. Measurement of metal concentrations were carried out using instrumental neutron activation analysis techniques. Samples were irradiated in Rabbit and Lazy Susan system facility at the Kartini research reactor located in Centre for Accelerator Science and Technology. Irradiated samples then counted using HPGe detector. Concentration values for heavy metals were below the maximum recommended value stated by WHO and FAO. Transfer factor (TF) is used to assess the concentration of metals in cassava leaves and grass taken from soil. The TF value calculated in this research were below 1, this implied that cassava leaves and grass were safe from the risk of heavy metals. The highest transfer factor value is Sb, it showed that is Sb was more mobile compare to other metals.

Sampel Total Suspended Particulate (TSP) udara ambien di enam lokasi sampling di sekitar PLTU Pacitan telah dilakukan asesmen masing-masing kandungan logam beratnya. Tujuan dari penelitian ini adalah untuk menilai kualitas udara sehubungan dengan partikulat udara, kandungan logam berat (As, Cd, Cr, Cu, Sb dan Zn), dan metaloid (Mg, V, Al, Mn, Fe, Co) pada TSP serta mempelajari tren polutan di sekitar PLTU. Sampel partikulat udara TSP dipreprasi dengan metode gravimetri dan identifikasi logam berat berbahaya (As, Cd, Cr, Cu, Sb, Zn), metaloid (Mg, V, Al, Mn, Fe, Co) dengan menggunakan teknik analisis aktivasi neutron. Kandungan logam berat berbahaya dalam sampel filter TSP terendah As (arsen) dengan nilai rata-rata 0,349±0,0400 ng/m 3 dan konsentrasi terbesar adalah Zn (seng) dengan konsentrasi rata-rata 58,1±3,24 ng/m 3 , dibandingkan dengan standar kualitas udara primer standar ambang tahunan rata-rata yang ditetapkan oleh Uni Eropa maupun WHO untuk Cr, As, dan Cd masing-masing adalah 2,5 ng/m 3 ; 6 ng/m 3 ; dan 5 ng/m 3 , sedangkan hasil penelitian ini masing-masing mempunyai konsentrasi 0,367 ng/m 3 ; 0,349 ng/m 3 ; dan 0,243 ng/m 3 . Hal ini menunjukkan logam berat diudara di sekitar PLTU Pacitan dalam batas masih terkendali dengan jarak sekitar 0,6 km sampai 3 km dari cerobong pembuangan gas hasil sisa pembakaran.

This research was conducted to assess the concentration of hazardous heavy metals (Cu, Zn, As, Cd, and Cr) in water wells and rivers, around the Adipala Cilacap steam power plant, using neutron activation analysis method. Sample of wells water and river water were taken around the Adipala Cilacap steam power plant. Samples were irradiated with pneumatic facility and Lazy Suzan in the Kartini Research Reactor, at a thermal neutron flux of approximately 0.58x1011 n.cm−2.det−1. The average concentration of hazardous heavy metals has the smallest metal value of Cr with a value of 0.0006 mg/L and the highest metal Cu with a value of 0.057 mg/L, which is examined in water wells following a decrease in the order of Cu > Zn > As > Cd > Cr. The five hazardous heavy metals under the maximum standard recommended by the WHO/USEPA and Minister of Health’s Regulation No. 492. In addition to the hazardous heavy metals, there are 13 other heavy metals that determined its concentration (Al, Ba, Mg, K, Fe, Na, Mn, Ti, La, Ce, Sm, Cs, and V), and obtained the results of the metal concentrations Al exceeds the threshold allowable by Minister of Health’s Regulation No. 492 the Year 2010.

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