Influence of surface chemistry of carbon materials on their interactions with inorganic nitrogen contaminants in soil and water

Sumaraj,; Padhye, Lokesh P.

doi:10.1016/j.chemosphere.2017.06.021

Cited by 51 publications

(20 citation statements)

References 138 publications

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“…Possible pathways include: (1) gradual transformation of carboxylic groups to carbonylic and ketonic groups, and/or (2) destruction of ketonic or aldehydic groups [28]. By contrast, the oxidation of AC by acid treatment improved its oxygen content, which was in agreement with the findings from previous studies demonstrating that acid treatment leads to the formation of oxygencontaining surface functional groups on the surface of AC [37][38][39]. In addition, acid treatment significantly reduced the ash content since the acid used in the treatment can dissolve metals and minerals, which resulted in the lowering of the ash components [38,40].…”

Section: Characterization Of Activated Carbonsupporting

confidence: 90%

“…These clusters result in pore blockage [43], which inhibits the sorption of other molecules, NDMA in this study, into the micropores. In some cases, the water clusters could form hydrogen bonds with the sorbate promoting adsorption of the sorbate [39]. Our results showed that commercial AC, with the highest micropore volume, had the least recovery, indicating inhibition than the promotion of sorbate adsorption in micropores.…”

Section: Resultsmentioning

confidence: 87%

“…In many studies on AC, it has been shown that adsorption of organic contaminants followed pseudosecond-order kinetics [48,49]. This model assumes that adsorption is mainly controlled by chemisorption [48], resulting from one or more of the following mechanisms: hydrogen bonding, electrostatic interactions, hydrophobic/hydrophilic interactions, and electron donor-acceptor mechanism of π electron [39].…”

Section: N-nitrosodimethylamine Recoveries For Modified Activated Carbonmentioning

confidence: 99%

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Surface modification of coconut shell activated carbon for efficient solid‐phase extraction of N‐nitrosodimethylamine from water

Astuti

Jasemizad

Padhye

2020

J of Separation Science

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A practical and cheap methodology in modifying commercial coconut shell activated carbon for solid‐phase extraction of N‐nitrosodimethylamine in water was developed through an understanding of activated carbon surface chemistry. In comparison with commercial activated carbon, extraction recoveries by activated carbon treated with sulfuric acid decreased by 50%, while those of activated carbon heated at 800°C improved by more than 100%. Acid treatment increased the oxygen content on the carbon's surface. In contrast, heat treatment decreased the surface oxygen content, resulting in a more hydrophobic surface, which favoured adsorption and extraction of N‐nitrosodimethylamine. The influence of different activated carbon sizes, amount of modified activated carbon, and pH on the N‐nitrosodimethylamine recoveries was assessed and compared with the commercial solid‐phase extraction cartridge. The recommended amount of powder activated carbon treated at 800°C was 3 g to yield an optimum recovery of 130%, which was superior to the commercial solid‐phase extraction cartridges. The method validation results confirmed the high accuracy, reproducibility, and precision of the method. The study indicated that chemisorption plays a significant role in the adsorption of N‐nitrosodimethylamine on activated carbon, and the optimization of its surface chemistry can enhance N‐nitrosodimethylamine adsorption/extraction from water.

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Section: Characterization Of Activated Carbonsupporting

confidence: 90%

Section: Resultsmentioning

confidence: 87%

Section: N-nitrosodimethylamine Recoveries For Modified Activated Carbonmentioning

confidence: 99%

See 1 more Smart Citation

Surface modification of coconut shell activated carbon for efficient solid‐phase extraction of N‐nitrosodimethylamine from water

Astuti

Jasemizad

Padhye

2020

J of Separation Science

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“…Nowadays, such materials, i.e., magnetic composites (MC), are considered as promising functional materials that have gained significant attention due to their inherent magnetic properties [28,29]. It is well known that the properties of CM are determined both by their structure and the chemical nature of their surface [30]. The spatial arrangement of the carbon atoms determines the texture and structure of CM, while the presence of various heteroatoms such as oxygen, nitrogen, or phosphorus, originating from the precursor or activation agent, changes their chemical properties [31,32].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Functional Carbon/Magnetic Nanocomposites as A Promising Model of Utilization of Used Crosslinked Polymers

et al. 2018

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The utilization of used crosslinked functional polymers (CFP) applied as sorbents or ion-exchangers is a great challenge arising from the need to protect the environment. In this paper we report a very promising way of obtaining carbon/magnetic composites based on metal (Co2+; Ni2+; Fe3+) derivatives of butadiene rubber-based phosphorus-containing polymer, which were treated as the model used CFP. We proposed a facile one-step thermal degradation approach to transform used CFP into carbon/magnetic composites (CMC). The obtained CMCs contained a mixture of metal phosphates and metal phosphides that exhibited strong magnetic properties due to the presence of nanosized metal derivatives with diameters of 100–140 nm. Structural and morphological changes of CFP and CMC after thermal degradation were investigated by the FTIR technique, X-ray Diffraction analysis, Scanning Electron Microscope, and Atomic Force Microscope–Magnetic Force Microscope. Moreover, thermal degradation kinetics parameters were determined to optimize the efficiency of the process.

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“…However, as gasification-based biochars are generally produced at higher temperatures and under a reactive atmosphere, their physico-chemical properties may vary from those of pyrolysis, and should be carefully analyzed to determine their suitability in soil applications [19]. In particular, when steam is used as gasifying agent, the associated solid by-product may develop larger porosities and specific surface areas in comparison to pyrolysis biochars, and may have an important amount of oxygen-containing functional groups that could enhance properties like cation exchange (CEC) and acid neutralization capacities (ANC) [20][21][22]. These properties, particularly interesting for soil amendment applications, may open a valorization pathway for gasification biochars.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Steam Gasification Biochars from Lignocellulosic Agrowaste Towards Soil Applications

Millán

Vargas

Nzihou

2020

Waste Biomass Valor

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The main objective of this work was to analyze the physico-chemicals properties of biochars produced from the steam gasification of different lignocellulosic agrowastes, and determine the suitability of these materials to be used in soil amendment and remediation applications. Steam gasification biochars from three lignocellulosic agrowastes were extensively characterized. Coconut shells (CS), bamboo guadua (BG), and oil palm shells (OPS) were chosen as raw materials, considering their different macromolecular structure and inorganic composition. The biochars composition, morphology, pH, acid neutralization (ANC) and cation exchange (CEC) capacities, as well as their mineral release at different conditions were evaluated and compared. The experimental results showed that the inorganic content and composition of the biochars have a stronger impact on their properties for soil applications, in comparison to their organic composition and morphology. In particular, BG biochar, the sample with the highest mineral content, exhibited the most notable cation exchange (45 cmol c /kg) and acid neutralization capacities (125 cmol H + /kg), together with the greatest release of plant micro and macro-nutrients. In the case of biochars with low mineral content, higher CEC and ANC were most related to the presence of oxygen-containing functional groups in their surface. Considering that agricultural residues come from numerous sources and activities, the presented results usefully contribute to the comprehension of the relationship between the raw biomass characteristics, the physico-chemical properties of steam gasification biochars, and their expected performance in soil applications, opening a new promising valorization pathway for these materials.

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Influence of surface chemistry of carbon materials on their interactions with inorganic nitrogen contaminants in soil and water

Cited by 51 publications

References 138 publications

Surface modification of coconut shell activated carbon for efficient solid‐phase extraction of N‐nitrosodimethylamine from water

Surface modification of coconut shell activated carbon for efficient solid‐phase extraction of N‐nitrosodimethylamine from water

Fabrication of Functional Carbon/Magnetic Nanocomposites as A Promising Model of Utilization of Used Crosslinked Polymers

Characterization of Steam Gasification Biochars from Lignocellulosic Agrowaste Towards Soil Applications

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