Manganese oxide-modified biochars: Preparation, characterization, and sorption of arsenate and lead

Wang, Shengsen; Gao, Bin; Li, Yuncong; Mosa, Ahmed; Zimmerman, Andrew R.; Lena, Q.; Harris, Willie G.; Migliaccio, Kati W.

doi:10.1016/j.biortech.2015.01.044

Cited by 354 publications

(126 citation statements)

References 29 publications

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“…Fourth method is based on methods described in sources [27,41] which are natural zeolite modification methods with manganese oxides. Concentrations used are the same as described in source [27].…”

Section: Fourth Methodsmentioning

confidence: 99%

Use of Synthetic and Natural Zeolites Tailored for As(V) Sorption

Krauklis¹

2018

Zeolites and Their Applications

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Arsenic in drinking water poses serious potential health risks in more than 30 countries with total affected population of around 100 million people. Natural and synthetic zeolites can be tailored in order to obtain improved sorption of As(V) making them a relatively cheap and efficient material for water remediation. The chapter is concentrated on the zeolitic materials for water remediation, and reports new findings regarding modification methods and comparison of such materials for the use in As(V) sorption applications. Methods of modification of zeolites are developed and explained. On the experimental and novel scale, using developed methods, 11 novel materials are synthesized and studied. Initial and modified materials are characterized by optical microscopy, SEM and EDX, as well as by metal content in those which are determined using dissolution in acids and FAAS.

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Section: Fourth Methodsmentioning

confidence: 99%

Use of Synthetic and Natural Zeolites Tailored for As(V) Sorption

Krauklis¹

2018

Zeolites and Their Applications

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“…Furthermore, although mineral-biochar composites are a subject continuing research interest, much of the work has been focused on their properties or applications 20,[24][25] and within the literature there is generally only a qualitative understanding the molecular structure of the mineral impregnated biochar 14,26 . This study attempts to bridge this gap in knowledge and is the first in a series that examines the interaction of biomass, clay and minerals species with respect to the molecular structure and the micro-and meso-porosity of the biochar.…”

Section: Introductionmentioning

confidence: 99%

Mineral–Biochar Composites: Molecular Structure and Porosity

Rawal¹,

Joseph²,

Hook³

et al. 2016

Environ. Sci. Technol.

163

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Dramatic changes in molecular structure, degradation pathway, and porosity of biochar are observed at pyrolysis temperatures ranging from 250 to 550 °C when bamboo biomass is pretreated by iron-sulfate-clay slurries (iron-clay biochar), as compared to untreated bamboo biochar. Electron microscopy analysis of the biochar reveals the infusion of mineral species into the pores of the biochar and the formation of mineral nanostructures. Quantitative 13C nuclear magnetic resonance (NMR) spectroscopy shows that the presence of the iron clay prevents degradation of the cellulosic fraction at pyrolysis temperatures of 250 °C, whereas at higher temperatures (350-550 °C), the clay promotes biomass degradation, resulting in an increase in both the concentrations of condensed aromatic, acidic, and phenolic carbon species. The porosity of the biochar, as measured by NMR cryoporosimetry, is altered by the iron-clay pretreatment. In the presence of the clay, at lower pyrolysis temperatures, the biochar develops a higher pore volume, while at higher temperature, the presence of clay causes a reduction in the biochar pore volume. The most dramatic reduction in pore volume is observed in the kaolinite-infiltrated biochar at 550 °C, which is attributed to the blocking of the mesopores (2-50 nm pore) by the nonporous metakaolinite formed from kaolinite. Disciplines Engineering | Physical Sciences and Mathematics

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“…Sorption of lead on chitosan-modified biochar also reduced its metal toxicity. Wang et al (2015a) conducted a study to compare the ability to sorb arsenic and lead by biochars made at different temperature (300, 450 and 600°C). He investigated that both feedstock type and pyrolysis temperature affected biochars production rate (28-50%) and their ability to sorb the two metals in aqueous solutions with stock solutions made of sodium arsenate dibasic heptahydrate and lead nitrate.…”

Section: Introductionmentioning

confidence: 99%

Development of biochar and chitosan blend for heavy metals uptake from synthetic and industrial wastewater

2017

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Heavy metals are usually released into water bodies from industrial/domestic effluents such as metal plating industries, mining and tanneries. Adsorption is a fundamental process in the physiochemical treatment of wastewaters because of its low cost. Great efforts have been made to use the economically efficient and unconventional adsorbents to adsorb heavy metals from aqueous solutions, such as plant wastes and agricultural waste. Biochar mixed with chitosan after crosslinking can be casted into membranes, beads and solutions which can be effectively utilized as an adsorbent for metal ion uptake. Keeping these facts into consideration, the present study was undertaken with the objective to determine the effect of various proportions of biochar-modified chitosan membranes on the sorption characteristics of different heavy metals like Cu, Pb, As and Cd along with comparison of sorption characteristics between industrial waste water samples containing multi-metals and standard synthetic stock solution containing a particular metal. It is apparent from the results that the bioadsorbent prepared from biochar and chitosan are low-cost efficacious resource due to its easy availability. It is also eco-friendly material for making adsorbent for abstraction of heavy metals from aqueous solution. This adsorbent can be best utilized for adsorption of heavy metals.

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Manganese oxide-modified biochars: Preparation, characterization, and sorption of arsenate and lead

Cited by 354 publications

References 29 publications

Use of Synthetic and Natural Zeolites Tailored for As(V) Sorption

Use of Synthetic and Natural Zeolites Tailored for As(V) Sorption

Mineral–Biochar Composites: Molecular Structure and Porosity

Development of biochar and chitosan blend for heavy metals uptake from synthetic and industrial wastewater

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