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Characterization data of N-doped biochars using different external nitrogen precursors.

ABSTRACT: The development of waste-derived functional materials for environmental and energy applications is a sustainable approach to fight global warming, and address energy and materials challenges. In this regard, many scientists are interested in the supercapacitor, adsorbent, and catalyst applications of nitrogen-doped biochars. In this article, we report the data that was collected as a part of our research on the effects of different external nitrogenous sources on the properties of biochar [1]. The data on infrared spectra of the modified samples at various temperatures is valuable to study the changes in functional groups on biochar as a function of temperature as well as nitrogen precursors. Raw data from Time-of-flight Secondary ion mass spectroscopy, surface profilometry, and scanning electron microscopy-energy dispersive X-ray spectroscopy are also provided. We expect that the data will benefit researchers around the world working in the field of nitrogen modifications of biochar.

SUBMITTER: Kasera N

PROVIDER: S-EPMC7905361 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature

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Characterization data of N-doped biochars using different external nitrogen precursors.

Kasera Nitesh N Hall Steven S Kolar Praveen P

Data in brief 20210213

The development of waste-derived functional materials for environmental and energy applications is a sustainable approach to fight global warming, and address energy and materials challenges. In this regard, many scientists are interested in the supercapacitor, adsorbent, and catalyst applications of nitrogen-doped biochars. In this article, we report the data that was collected as a part of our research on the effects of different external nitrogenous sources on the properties of biochar [1]. T ...[more]

PMID: 33665263

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Project description:Nitrate-nitrogen (NO3--N) removal and garden waste disposal are critical concerns in urban environmental protection. In this study, biochars were produced by pyrolyzing various garden waste materials, including grass clippings (GC), Rosa chinensis Jacq. branches (RC), Prunus persica branches (PP), Armeniaca vulgaris Lam. branches (AV), Morus alba Linn. sp. branches (MA), Platycladus orientalis (L.) Franco branches (PO), Pinus tabuliformis Carrière branches (PT), and Sophorajaponica Linn. branches (SL) at three different temperatures (300 °C, 500 °C, and 700 °C). These biochars, labeled as GC300, GC500, GC700, and so on., were then used to adsorb NO3--N under various conditions, such as initial pH value, contact time, initial NO3--N concentration, and biochar dosage. Kinetic data were analyzed by pseudo-first-order and pseudo-second-order kinetic models. The equilibrium adsorption data were evaluated by Langmuir, Freundlich, Temkin and Dubinin-Radushkevich models. The results revealed that the biochar yields varied between 14.43% (PT700) and 47.09% (AV300) and were significantly influenced by the type of garden waste and decreased with increasing pyrolysis temperature, while the pH and ash content showed an opposite trend (p < 0.05). The efficiency of NO3--N removal was significantly influenced by the type of feedstock, preparation process, and adsorption conditions. Higher pH values had a negative influence on NO3--N adsorption, while longer contact time, higher initial concentration of NO3--N, and increased biochar dosage positively affected NO3--N adsorption. Most of the kinetic data were better fitted to the pseudo-second-order kinetic model (0.998 > R2 > 0.927). Positive b values obtained from the Temkin model indicated an exothermic process of NO3--N adsorption. The Langmuir model provided better fits for more equilibrium adsorption data than the Freundlich model, with the maximum NO3--N removal efficiency (62.11%) and adsorption capacity (1.339 mg·g-1) in PO700 under the conditions of pH = 2, biochar dosage = 50 mg·L-1, and a reaction time of 24 h. The outcomes of this study contribute valuable insights into garden waste disposal and NO3--N removal from wastewater, providing a theoretical basis for sustainable environmental management practices.

Dataset Information

Characterization data of N-doped biochars using different external nitrogen precursors.

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Characterization data of N-doped biochars using different external nitrogen precursors.

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