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Study of Humic Acid Adsorption Character on Natural Maifan Stone: Characterization, Kinetics, Adsorption Isotherm, and Thermodynamics

[Image: see text] In this paper, the adsorption of humic acid (HA) on natural maifan stone (MS) in aqueous medium was investigated. The changes in MS after adsorption have been characterized explicitly. The adsorption behavior was studied by varying the factors of pH (5–10), reaction time (10–180 mi...

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Autores principales: Yang, Hang, Luo, Binhua, Zhang, Yi, Zhou, Boxun, Manzoor Ahmed, Sanjrani, Liu, Huamin, Liu, Xiaowen, He, Yong, Xia, Shibin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7144149/
https://www.ncbi.nlm.nih.gov/pubmed/32280912
http://dx.doi.org/10.1021/acsomega.0c00622
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author Yang, Hang
Luo, Binhua
Zhang, Yi
Zhou, Boxun
Manzoor Ahmed, Sanjrani
Liu, Huamin
Liu, Xiaowen
He, Yong
Xia, Shibin
author_facet Yang, Hang
Luo, Binhua
Zhang, Yi
Zhou, Boxun
Manzoor Ahmed, Sanjrani
Liu, Huamin
Liu, Xiaowen
He, Yong
Xia, Shibin
author_sort Yang, Hang
collection PubMed
description [Image: see text] In this paper, the adsorption of humic acid (HA) on natural maifan stone (MS) in aqueous medium was investigated. The changes in MS after adsorption have been characterized explicitly. The adsorption behavior was studied by varying the factors of pH (5–10), reaction time (10–180 min), initial HA concentration (5–50 mg/L), adsorbent dosage (0.1–1.2 g), and temperature (25–45 °C). The kinetics of the adsorption process of HA was fitted well with the pseudo-second-order model (R(2) = 0.99). The isothermal results revealed that the adsorption process is favorable, and highly fitting Langmuir models (R(2) > 0.99) were used. Additionally, the obtained maximum adsorption capacity of MS for HA was approximately 1 mg/g. The adsorption process of HA onto MS was endothermic according to the thermodynamic study. The changes in the excitation–emission–matrix of HA and the X-ray diffraction of MS after adsorption indicate the interaction of HA and MS. However, the reason for these changes is still unclear. Thus, the results show that the natural MS exhibited a certain adsorption capacity for HA. It is promising to develop novel natural MS-based materials for adsorption of HA.
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spelling pubmed-71441492020-04-10 Study of Humic Acid Adsorption Character on Natural Maifan Stone: Characterization, Kinetics, Adsorption Isotherm, and Thermodynamics Yang, Hang Luo, Binhua Zhang, Yi Zhou, Boxun Manzoor Ahmed, Sanjrani Liu, Huamin Liu, Xiaowen He, Yong Xia, Shibin ACS Omega [Image: see text] In this paper, the adsorption of humic acid (HA) on natural maifan stone (MS) in aqueous medium was investigated. The changes in MS after adsorption have been characterized explicitly. The adsorption behavior was studied by varying the factors of pH (5–10), reaction time (10–180 min), initial HA concentration (5–50 mg/L), adsorbent dosage (0.1–1.2 g), and temperature (25–45 °C). The kinetics of the adsorption process of HA was fitted well with the pseudo-second-order model (R(2) = 0.99). The isothermal results revealed that the adsorption process is favorable, and highly fitting Langmuir models (R(2) > 0.99) were used. Additionally, the obtained maximum adsorption capacity of MS for HA was approximately 1 mg/g. The adsorption process of HA onto MS was endothermic according to the thermodynamic study. The changes in the excitation–emission–matrix of HA and the X-ray diffraction of MS after adsorption indicate the interaction of HA and MS. However, the reason for these changes is still unclear. Thus, the results show that the natural MS exhibited a certain adsorption capacity for HA. It is promising to develop novel natural MS-based materials for adsorption of HA. American Chemical Society 2020-03-23 /pmc/articles/PMC7144149/ /pubmed/32280912 http://dx.doi.org/10.1021/acsomega.0c00622 Text en Copyright © 2020 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Yang, Hang
Luo, Binhua
Zhang, Yi
Zhou, Boxun
Manzoor Ahmed, Sanjrani
Liu, Huamin
Liu, Xiaowen
He, Yong
Xia, Shibin
Study of Humic Acid Adsorption Character on Natural Maifan Stone: Characterization, Kinetics, Adsorption Isotherm, and Thermodynamics
title Study of Humic Acid Adsorption Character on Natural Maifan Stone: Characterization, Kinetics, Adsorption Isotherm, and Thermodynamics
title_full Study of Humic Acid Adsorption Character on Natural Maifan Stone: Characterization, Kinetics, Adsorption Isotherm, and Thermodynamics
title_fullStr Study of Humic Acid Adsorption Character on Natural Maifan Stone: Characterization, Kinetics, Adsorption Isotherm, and Thermodynamics
title_full_unstemmed Study of Humic Acid Adsorption Character on Natural Maifan Stone: Characterization, Kinetics, Adsorption Isotherm, and Thermodynamics
title_short Study of Humic Acid Adsorption Character on Natural Maifan Stone: Characterization, Kinetics, Adsorption Isotherm, and Thermodynamics
title_sort study of humic acid adsorption character on natural maifan stone: characterization, kinetics, adsorption isotherm, and thermodynamics
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7144149/
https://www.ncbi.nlm.nih.gov/pubmed/32280912
http://dx.doi.org/10.1021/acsomega.0c00622
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