Waste walnut shell valorization to iron loaded biochar and its application to arsenic removal; Resource-Efficient Technologies; Vol. 3, iss. 1

Waste walnut shell valorization to iron loaded biochar and its application to arsenic removal; Resource-Efficient Technologies; Vol. 3, iss. 1

Dades bibliogràfiques
Parent link:Resource-Efficient Technologies: electronic scientific journal/ National Research Tomsk Polytechnic University (TPU).— , 2015-.— 2405-6537
Vol. 3, iss. 1.— 2017.— [P. 29–36]
Altres autors: Duan X. Xinhui, Zhang C. Chengcheng, Srinivasakannan C., Wang X. Xin
Sumari:Title screen
Iron loaded biochar (ILB) was prepared from waste walnut shell by microwave pyrolysis and its application for arsenic removal was attempted. The ILB was characterized using X-ray diffraction, scanning electron microscopy and BET Surface area analyzer. The adsorption isotherm of As (V) in ILB covering a temperature range of 25 to 45 °C, as well as the kinetics of adsorption at 25 °C were experimentally generated. The adsorption isotherms were modeled using Langmuir and Freundlich isotherm models, while the kinetics of adsorption was modeled using the pseudo-first-order, pseudo-second-order kinetic models, and intra particle diffusion model. The ILB had a surface area of 418 m2 /g with iron present in the form of hematite (Fe2O3) and magnetite (Fe3O4). The arsenic adsorption isotherm matches well with Langmuir isotherm model with a monolayer adsorption capacity of 1.91 mg/g at 25 °C. The adsorption capacity of As (V) well compares with other porous adsorbents widely reported in literature, supporting its application as a cost effective adsorbent.
Idioma:anglès
Publicat: 2017
Matèries:
труды учёных ТПУ
электронный ресурс
kinetics
thermodynamics
вода
адсорбенты
кинетика
термодинамика
Accés en línia:http://earchive.tpu.ru/handle/11683/50307
Format: Electrònic Capítol de llibre
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=572511

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