Insolubilization of Chestnut Shell Pigment for Cu(II) Adsorption from Water

Insolubilization of Chestnut Shell Pigment for Cu(II) Adsorption from Water

Chestnut shell pigment (CSP) is melanin from an agricultural waste. It has potential as an adsorbent for wastewater treatment but cannot be used in its original state because of its solubility in water. We developed a new method to convert CSP to insolubilized chestnut shell pigment (ICSP) by heatin...

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Main Authors: Zeng-Yu Yao, Jian-Hua Qi, Yong Hu, Ying Wang
Format: Article
Language:English
Published: MDPI AG 2016-03-01
Series:Molecules
Subjects:
Castanea
heating
heavy metal
melanin
removal
Online Access:http://www.mdpi.com/1420-3049/21/4/405
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spelling doaj-0b3ea66da33944128789eb2627dd7dba2020-11-24T22:47:14ZengMDPI AGMolecules1420-30492016-03-0121440510.3390/molecules21040405molecules21040405Insolubilization of Chestnut Shell Pigment for Cu(II) Adsorption from WaterZeng-Yu Yao0Jian-Hua Qi1Yong Hu2Ying Wang3Key Laboratory for Forest Resources Conservation and Use in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, ChinaKey Laboratory for Forest Resources Conservation and Use in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, ChinaKey Laboratory for Forest Resources Conservation and Use in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, ChinaFaculty of Science, Southwest Forestry University, Kunming 650224, ChinaChestnut shell pigment (CSP) is melanin from an agricultural waste. It has potential as an adsorbent for wastewater treatment but cannot be used in its original state because of its solubility in water. We developed a new method to convert CSP to insolubilized chestnut shell pigment (ICSP) by heating, and the Cu(II) adsorption performance of ICSP was evaluated. The conversion was characterized, and the thermal treatment caused dehydration and loss of carboxyl groups and aliphatic structures in CSP. The kinetic adsorption behavior obeyed the pseudo-second-order rate law, and the equilibrium adsorption data were well described with both the Langmuir and the Freundlich isotherms. ICSP can be used as a renewable, readily-available, easily-producible, environmentally-friendly, inexpensive and effective adsorbent to remove heavy-metal from aquatic environments.http://www.mdpi.com/1420-3049/21/4/405Castaneaheatingheavy metalmelaninremoval
collection DOAJ
language English
format Article
sources DOAJ
author Zeng-Yu Yao
Jian-Hua Qi
Yong Hu
Ying Wang
spellingShingle Zeng-Yu Yao
Jian-Hua Qi
Yong Hu
Ying Wang
Insolubilization of Chestnut Shell Pigment for Cu(II) Adsorption from Water
Molecules
Castanea
heating
heavy metal
melanin
removal
author_facet Zeng-Yu Yao
Jian-Hua Qi
Yong Hu
Ying Wang
author_sort Zeng-Yu Yao
title Insolubilization of Chestnut Shell Pigment for Cu(II) Adsorption from Water
title_short Insolubilization of Chestnut Shell Pigment for Cu(II) Adsorption from Water
title_full Insolubilization of Chestnut Shell Pigment for Cu(II) Adsorption from Water
title_fullStr Insolubilization of Chestnut Shell Pigment for Cu(II) Adsorption from Water
title_full_unstemmed Insolubilization of Chestnut Shell Pigment for Cu(II) Adsorption from Water
title_sort insolubilization of chestnut shell pigment for cu(ii) adsorption from water
publisher MDPI AG
series Molecules
issn 1420-3049
publishDate 2016-03-01
description Chestnut shell pigment (CSP) is melanin from an agricultural waste. It has potential as an adsorbent for wastewater treatment but cannot be used in its original state because of its solubility in water. We developed a new method to convert CSP to insolubilized chestnut shell pigment (ICSP) by heating, and the Cu(II) adsorption performance of ICSP was evaluated. The conversion was characterized, and the thermal treatment caused dehydration and loss of carboxyl groups and aliphatic structures in CSP. The kinetic adsorption behavior obeyed the pseudo-second-order rate law, and the equilibrium adsorption data were well described with both the Langmuir and the Freundlich isotherms. ICSP can be used as a renewable, readily-available, easily-producible, environmentally-friendly, inexpensive and effective adsorbent to remove heavy-metal from aquatic environments.
topic Castanea
heating
heavy metal
melanin
removal
url http://www.mdpi.com/1420-3049/21/4/405
work_keys_str_mv AT zengyuyao insolubilizationofchestnutshellpigmentforcuiiadsorptionfromwater
AT jianhuaqi insolubilizationofchestnutshellpigmentforcuiiadsorptionfromwater
AT yonghu insolubilizationofchestnutshellpigmentforcuiiadsorptionfromwater
AT yingwang insolubilizationofchestnutshellpigmentforcuiiadsorptionfromwater
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