UÇAR, Mustafa Afyon Kocatepe Üniversitesi - Fen Edebiyat Fakültesi - Kimya Bölümü, Turkey , EVCİN, Atilla Afyon Kocatepe Üniversitesi - Mühendislik Fakültesi - Malzeme Bilimi ve Mühendisliği Bölümü, Turkey , ÜNVERDİ, Haydar Afyon Kocatepe Üniversitesi - Mühendislik Fakültesi - Malzeme Bilimi ve Mühendisliği Bölümü, Turkey , UÇAR, Songül Afyon Kocatepe Üniversitesi - Şuhut Meslek Yüksek Okulu - Gıda Teknolojisi Bölümü, Turkey

Removal of 4-Chlorophenol from Aqueous Solution by Al2O3 Additive Hydroxyapatite

27658

In this study, Al2O3 doped the hydroxyapatite (HAP) nanopowders prepared by chemical precipitation method were used as the adsorbent, and the potential of HAP nanopowders for 4-chlorophenol adsorption from aqueous solution was studied. Ca/P molar ratio in HAP is made to be 1.67. Aluminum alkoxide dissolved in isopropyl alcohol. Pure and 10% (w) Al2O3 doped HAP were calcined at 1100°C. The effect of contact time, initial phenol concentration, pH and adsorbent dosage, on the 4-chlorophenol adsorption, and the adsorption was investigated. The results showed that the HAP nanopowders possessed good adsorption ability to 4-chlorophenol. The adsorption process was fast, and it reached equilibrium in 15 min of contact. The initial phenol concentration and pH played obvious effects on the 4-chlorophenol adsorption capacity onto HAP nanopowders. Increase in the initial phenol concentration could effectively increase the 4-chlorophenol adsorption capacity. At the same time, increase in the pH also resulted in the decrease in the 4-chlorophenol adsorption capacity. Increase in the HAP dosage could effectively increase the 4-chlorophenol adsorption percent. The maximum phenol adsorption capacity was obtained as 10.03 mg/g for 200 mg/L initial phenol concentrations at pH 6.4. The Freundlich isotherm were the best choices to describe the adsorption behaviors. FT-IR, XRD, SEM-EDX, DTA-TGA were applied to the characterization techniques for before and after HAP adsorption.

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Hydroxyapatite , Alumina , Adsorption , 4 , chlorophenol, removal of phenol

Afyon Kocatepe University Journal Of Science an‎d Engineering

232