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Dergiler / Sakarya University Journal of Science / 2019 / Cilt: 23 Sayı: 6

Preparation And Characterization Of Novel Iron (III) HydroxidePaper Mill Sludge Composite Adsorbent For Chromium Removal

Ali YARAŞ
Hasan ARSLANOĞLU
Sayfa
1019–1026
Yayın Tarihi
2019-12-01
DOI
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These results demonstrated that the adsorption phenomenon of Cr (III) and Cr (VI) are endothermic and exothermic.

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Amaç & Hipotez:This work deals with the removal of Cr (III) and Cr (VI) from synthetic solutions via a novel composite adsorbent prepared by precipitating iron (III) hydroxide on paper mill sludge (PMS).
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Temel Bulgular & Veri:To obtain Fe(OH)3 loaded PMS, -8+16 mesh fraction of PMS was saponified with NaOH solution, then iron (III) chloride was impregnated, hydrolyzed in NaOH solution and dried.
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Sonuç & Katkı:These results demonstrated that the adsorption phenomenon of Cr (III) and Cr (VI) are endothermic and exothermic.
🔬Tür:Araştırma Makalesi
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:Cr (VI) reduction · iron (III) hydroxide

Abstract

This work deals with the removal of Cr (III) and Cr (VI) from synthetic solutions via a novel composite adsorbent prepared by precipitating iron (III) hydroxide on paper mill sludge (PMS). To obtain Fe(OH)3 loaded PMS, -8+16 mesh fraction of PMS was saponified with NaOH solution, then iron (III) chloride was impregnated, hydrolyzed in NaOH solution and dried. The influences of pH, time, initial concentration and temperature on removal of Cr (III) and Cr (VI) were examined and it was determined that Cr (VI) removal occurs simultaneously with a reduction reaction. Maximum removal yields for Cr (III) and Cr (VI) occurred at approximately pH = 5 and the adsorption achieved equilibrium in 90 min. Cr (VI) adsorption ratio decreases while Cr (III) removal percentage increases with raising in temperature. Experimental results are consistent with Langmuir isotherm. Adsorption capacities of Cr (III) and Cr (VI) were calculated as 8.49, 10.14, 12.62 mg/g and 7.64, 5.39 and 4.17 mg/g for 25, 40 and 55 °C, respectively. Enthalpy changes for Cr (III) and Cr (VI) were calculated as 24.67 kJ/mol and -12.46 kJ/mol, respectively. These results demonstrated that the adsorption phenomenon of Cr (III) and Cr (VI) are endothermic and exothermic.

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Bu Makaleye Atıf Yap

YARAŞ, A., ARSLANOĞLU, H. (2019). Preparation And Characterization Of Novel Iron (III) HydroxidePaper Mill Sludge Composite Adsorbent For Chromium Removal. Sakarya University Journal of Science, Cilt: 23 Sayı: 6, 1019–1026. https://ajindex.com/articles/941964

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