Fındık Kabuğundan Aktif Karbon Üretiminin Optimizasyonu ve Sulu Çözeltiden Cu+2 Adsorpsiyonu

Bu çalışmada, fındıkkabuğundan aktif karbon üretmek için fraksiyon faktöriyel yöntemi kullanılmıştır.Tane boyutu, emdirme oranı, fırın sıcaklığı ve fırında kalma süresi parametre olarak seçilmiştir. Optimum şartlarıbelirlemek için esnek simpleks yöntemi kullanılmış ve optimum koşullar: emdirme oranı 0.792 (mL asit gkabuk-1),sıcaklık 431.3 K ve fırında kalma süresi 7.45 saat olarak bulunmuştur. Optimum şartlarda üretilen aktif karbonunadsorpsiyon kapasitesi; çalışma sıcaklığı= 293 K, pH = 5, Cu+2konsantrasyonu= 250 mg L-1ve karbon miktarı= 3 gL-1’de, 30 mg g-1 olarak bulunmuştur. Cu+2 adsorpsiyonu üzerine bakır konsantrasyonu, adsorbent miktarı, sıcaklıkve çözelti pH’ sının etkileri kesikli bir sisteminde incelenmiştir. Adsorpsiyon verileri Langmuir ve Freundlichizotermlerine uygulanmış ve her iki izotermin denge verilerini iyi temsil ettiği gözlenmiştir.

Anahtar Kelimeler:

Adsorpsiyon, bakır, fındıkkabuğu, Langmuir izotermi, Freundlich izotermi

Optimization Activated Carbon from Hazelnut Shell and Cu+2 Adsorption from Aqueous Solution

In this study, fractional factorial design was used to prepare activated carbon from hazelnut shell.Particle size, impegnation ratio, temperature and time as parameters were chosen. The ﬂexible simpleks methodwas used to determine optimum conditions. The optimum conditions were determined as impegnation ratio 0.792mL acid gshell-1, temperature 413.3 K and time 7.45 h. Adsorption capacity of activated carbonprepared at optimumconditions was found as 30 mg Cu+2 g activated carbon-1 at temperature 293 K, pH 5, concentration of Cu+2 250 mgL-1 and amount of activated carbon 3 g L-1. The effects of concentration of copper, adsorbent content, temperature,and solution pH on adsorption of Cu+2 have been investigated in the batch system. Langmuir and Freundlichisotherms ft the experimental data and both of isotherms were observed to be best represents the equilibrium data

Keywords:

Adsorption, copper, Freundlich isotherm, hazelnut shell, Langmuir isotherm,

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