@article{dd91764181e5450e9ba8f2bef26d41ee,
title = "Adsorption and thermodynamic mechanisms of manganese removal from aqueous media by biowaste-derived biochars",
abstract = "In the present investigation, poultry manure and farmyard manure-derived biochars were applied as cost-effective adsorbents for manganese (Mn) removal from aqueous media. Effects of functional parameters such as solution pH, contact time, temperature and concentration on the Mn removal efficiency of biochars were evaluated. Poultry manure-derived biochar exhibited greater adsorption efficiency than farmyard manure-derived biochar due to its porosity and surface functionality. The maximum adsorption was achieved at pH 6, temperature 298 K and contact time of 3 h. The adsorption isotherm data was well fitted to the Freundlich model indicating multilayer adsorption onto heterogeneous surfaces of the biochars. Thermodynamics calculations affirmed that Mn adsorption onto biochars was spontaneous and exothermic process governed by hydrogen bonding type of electrostatic interaction. Post-adsorption spectroscopic analysis of Mn-loaded biochars evidenced the binding of Mn with active surface functionalities of biochars.",
keywords = "Char, Equilibrium, Manure, Sorption, Water treatment",
author = "Muhammad Idrees and Saima Batool and Hidayat Ullah and Qaiser Hussain and Al-Wabel, {Mohammad I.} and Mahtab Ahmad and Amjad Hussain and Muhammad Riaz and Ok, {Yong Sik} and Jie Kong",
note = "Funding Information: The authors extend their appreciation to the Deanship of Scientific Research at King Saud University for funding this work through research group No ( RG-1439-043 ). The authors are thankful to Analytical and Testing Center of NPU, Northwestern Polytechnical University, Xi'an 710072 P.R. China and Laboratory of Soil Science & Soil Water Conservation, PMAS Arid Agriculture University, Rawalpindi, Pakistan for providing research opportunities, analysis and characterization of the sorbents. Chinese Scholarship Council ( CSC No: 2015GXZ039 , 2016GXYF32 ) financial support is gratefully acknowledged to pursuing Ph.D. studies. Funding Information: The authors extend their appreciation to the Deanship of Scientific Research at King Saud University for funding this work through research group No (RG-1439-043). The authors are thankful to Analytical and Testing Center of NPU, Northwestern Polytechnical University, Xi'an 710072 P.R. China and Laboratory of Soil Science & Soil Water Conservation, PMAS Arid Agriculture University, Rawalpindi, Pakistan for providing research opportunities, analysis and characterization of the sorbents. Chinese Scholarship Council (CSC No: 2015GXZ039, 2016GXYF32) financial support is gratefully acknowledged to pursuing Ph.D. studies. Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",
year = "2018",
month = sep,
day = "15",
doi = "10.1016/j.molliq.2018.06.049",
language = "English",
volume = "266",
pages = "373--380",
journal = "Journal of Molecular Liquids",
issn = "0167-7322",
publisher = "Elsevier",
}