TY - JOUR
T1 - High methoxyl pectin extracts from Hylocereus polyrhizus's peels
T2 - Extraction kinetics and thermodynamic studies
AU - Zaid, Rubaiyi M.
AU - Mishra, Puranjan
AU - Tabassum, Shabana
AU - Wahid, Zularisam Ab
AU - Sakinah, A.M. Mimi
N1 - Funding Information:
The authors are thankful to Faculty of Engineering Technology, for providing technical and financial assistance to UMP (PGRS-160361, Universiti Malaysia Pahang, Malaysia) and Ministry of Education, Malaysia (My Brain-15).
Publisher Copyright:
© 2019 Published by Elsevier B.V.
PY - 2019/12/1
Y1 - 2019/12/1
N2 - The effect of physicochemical treatment on pectin yield, degree of esterification, along with the kinetics and thermodynamics characteristics was investigated in the present study. Several extraction parameters were observed to have impacted the yield and degree of esterification significantly, and the best extraction condition was as follows: agitation rate of 250 rpm, temperature of 70 °C, extraction time of 120 min, pH 2, and liquid to solid ratio of 10 v/w which has resulted in 28.20% of pectin yield, with DE (degree of esterification) of 57.00%. A theoretical model which describes the extractability, dissolution and degradation rate of pectin to predict the maximal yield at the maximal time was established to study the extraction kinetics of pectin from HPP. The kinetic analysis from Panchev's model shows the extraction rate was found highest at LSR 10 with ymax 30.85%. The calculated activation energy for pectin dissolution and degradation was found to be 4.532 kJ/mol and 28.054 kJ/mol, respectively. The thermodynamic study has suggested that the process was endothermic, spontaneous and reversible. These results suggest that the physical and chemical treatment applied could be an efficient technique for the extraction of pectin from Hylocereus polyrhizus peels.
AB - The effect of physicochemical treatment on pectin yield, degree of esterification, along with the kinetics and thermodynamics characteristics was investigated in the present study. Several extraction parameters were observed to have impacted the yield and degree of esterification significantly, and the best extraction condition was as follows: agitation rate of 250 rpm, temperature of 70 °C, extraction time of 120 min, pH 2, and liquid to solid ratio of 10 v/w which has resulted in 28.20% of pectin yield, with DE (degree of esterification) of 57.00%. A theoretical model which describes the extractability, dissolution and degradation rate of pectin to predict the maximal yield at the maximal time was established to study the extraction kinetics of pectin from HPP. The kinetic analysis from Panchev's model shows the extraction rate was found highest at LSR 10 with ymax 30.85%. The calculated activation energy for pectin dissolution and degradation was found to be 4.532 kJ/mol and 28.054 kJ/mol, respectively. The thermodynamic study has suggested that the process was endothermic, spontaneous and reversible. These results suggest that the physical and chemical treatment applied could be an efficient technique for the extraction of pectin from Hylocereus polyrhizus peels.
KW - Pectin extraction
KW - Hylocereus polyrhizus
KW - High methoxyl pectin
KW - Extraction kinetics
UR - http://www.scopus.com/inward/record.url?scp=85074177617&partnerID=8YFLogxK
U2 - 10.1016/j.ijbiomac.2019.09.017
DO - 10.1016/j.ijbiomac.2019.09.017
M3 - Journal article
C2 - 31494156
SN - 0141-8130
VL - 141
SP - 1147
EP - 1157
JO - International Journal of Biological Macromolecules
JF - International Journal of Biological Macromolecules
ER -