Preparation and Characterisation of Biochar from Hazelnut Shell and Its Adsorption Properties for Methylene Blue Dye

Nihan Kaya; Zeynep Yıldız; Selim Ceylan

Makale detayları

Preparation and Characterisation of Biochar from Hazelnut Shell and Its Adsorption Properties for Methylene Blue Dye

Yazarlar:

Nihan Kaya | Zeynep Yıldız | Selim Ceylan

Yayıncı:

Gazi University

Ana Başlıklar:

Uygulamalı fizik

Dergi:

Journal of Polytechnic 2018 Vol.21 Issue 4, pp.765-776

Belge Tipi:

Makale

Yayın Tarihi:

11/2018

Belge Dili:

Türkçe

Document ID (Org No.):

2000590359

Sıklık:

Aylık

eISSN:

2147-9429

Özet:

 


One of the major
pollutants in water resources are organic dyes that are widely used by
different industries. Methylene blue (MB) is one of them which is quite harmful
for aquatic life. This pollutant must be removed with proper methods.
Adsorption is one of the most popular methods because of its high purification
yield and known as a cost effective process if the sorbent is inexpensive. In
this study, biochar which is used as an adsorbent has been produced from
hazelnut shells used as the raw material. Chemical, thermal and surface
characteristics of raw hazelnut shell were investigated by FT-IR, TG/DTG, SEM
and elemental analysis. Biochar characteristics were determined by FT-IR, BET
and SEM analysis. The effect of different adsorption parameters such as pH,
initial dye concentration, contact time, adsorbent dosage and temperature on
the adsorption of MB onto hazelnut shell char were examined in batch
experiments. The equilibrium of adsorption was modeled using Langmuir and
Freundlich isotherm models. The maximum adsorption yield of MB was found to be
83% at pH 4.0, adsorbent dosage of 4 g/L, contact time of 300 min., initial dye
concentration of 15 mg/L and temperature of 45 oC. In addition, the
Freundlich isotherm was found to be the best fitting isotherm model for the
adsorption process. The pseudo-first-order and pseudo-second-order kinetic
models were applied to the experimental data and thermodynamic parameters such
as Gibbs free energy, enthalpy and entropy were determined. 

.

 


One of the major
pollutants in water resources are organic dyes that are widely used by
different industries. Methylene blue (MB) is one of them which is quite harmful
for aquatic life. This pollutant must be removed with proper methods.
Adsorption is one of the most popular methods because of its high purification
yield and known as a cost effective process if the sorbent is inexpensive. In
this study, biochar which is used as an adsorbent has been produced from
hazelnut shells used as the raw material. Chemical, thermal and surface
characteristics of raw hazelnut shell were investigated by FT-IR, TG/DTG, SEM
and elemental analysis. Biochar characteristics were determined by FT-IR, BET
and SEM analysis. The effect of different adsorption parameters such as pH,
initial dye concentration, contact time, adsorbent dosage and temperature on
the adsorption of MB onto hazelnut shell char were examined in batch
experiments. The equilibrium of adsorption was modeled using Langmuir and
Freundlich isotherm models. The maximum adsorption yield of MB was found to be
83% at pH 4.0, adsorbent dosage of 4 g/L, contact time of 300 min., initial dye
concentration of 15 mg/L and temperature of 45 oC. In addition, the
Freundlich isotherm was found to be the best fitting isotherm model for the
adsorption process. The pseudo-first-order and pseudo-second-order kinetic
models were applied to the experimental data and thermodynamic parameters such
as Gibbs free energy, enthalpy and entropy were determined. 

.

Makale detayları

Preparation and Characterisation of Biochar from Hazelnut Shell and Its Adsorption Properties for Methylene Blue Dye

Yazarlar: Nihan Kaya | Zeynep Yıldız | Selim Ceylan

Yayıncı: Gazi University

Ana Başlıklar: Uygulamalı fizik

Dergi: Journal of Polytechnic 2018 Vol.21 Issue 4, pp.765-776

Belge Tipi: Makale

Yayın Tarihi: 11/2018

Belge Dili: Türkçe

Document ID (Org No.): 2000590359

Sıklık: Aylık

eISSN: 2147-9429

Sayı

Yazarlar:

Nihan Kaya | Zeynep Yıldız | Selim Ceylan

Yayıncı:

Gazi University

Ana Başlıklar:

Uygulamalı fizik

Dergi:

Journal of Polytechnic 2018 Vol.21 Issue 4, pp.765-776

Belge Tipi:

Makale

Yayın Tarihi:

11/2018

Belge Dili:

Türkçe

Document ID (Org No.):

2000590359

Sıklık:

Aylık

eISSN:

2147-9429