Production, characterization and adsorption studies of bamboo-based biochar/montmorillonite composite for nitrate removal

Víglašová, Eva; Galamboš, Michal; Danková, Zuzana; Krivosudský, Lukáš; Lengauer, Christian L.; Hood‐Nowotny, Rebecca; Soja, Gerhard; Rompel, Annette; Matík, Marek; Briančin, Jaroslav

doi:10.1016/j.wasman.2018.08.005

Cited by 128 publications

(52 citation statements)

References 52 publications

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“…The adsorption kinetic data were fitted by pseudo-first-order and pseudo-second-order models [43,44]. The adsorption isotherm data were fitted by the Langmuir [45] and Freundlich [46] isotherm models.…”

Section: Batch Adsorption Experimentsmentioning

confidence: 99%

Removal of Phosphorus from Wastewater by Different Morphological Alumina

et al. 2020

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In this work, an organic-free method was used to synthesize different morphological boehmite by controlling the crystallization temperature, and alumina adsorbents were obtained by baking the boehmites at 500 °C. The alumina adsorbents were characterized by X-ray diffraction (XRD), High resolution transmission electron microscope (HRTEM), Fourier transform infrared (FT-IR), N2 adsorption/desorption analysis, and their phosphorus adsorption properties were comparatively investigated by a series of experiments. The results showed that the self-prepared alumina adsorbents were lamellar and fibrous material, while the industrial adsorbent was a granular material. The lamellar alumina adsorbents had the largest specific surface area and showed better phosphorus adsorption capacity. The maximum adsorption capacity could reach up to 588.2 mg·g−1; and only 0.8 g·L−1 of lamellar alumina adsorbent is needed to treat 100 mg·L−1 phosphorus solution under the Chinese level 1 discharge standard (0.5 mg·L−1). Further investigation suggests that the lamellar alumina adsorbent kept high adsorption capacity in various solution environments.

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Section: Batch Adsorption Experimentsmentioning

confidence: 99%

Removal of Phosphorus from Wastewater by Different Morphological Alumina

et al. 2020

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“…In addition, ion exchange between NH 4 + and the negatively charged functional groups such as -OH and -COOH also led to the NH 4 + sorption. For NO 3 -, the sorption mechanisms are governed by multiple interactions, primarily electrostatic attraction, and ionic bonds with exchangeable cations from the biochar, based on the sorption study of NO 3by bamboo biochar (Viglašová et al, 2018).…”

Section: Inorganic Ionsmentioning

confidence: 99%

Peer Review #1 of "Recent advances in biochar application for water and wastewater treatment: a review (v0.2)"

2020

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In the past decade, researchers have carried out a massive amount of research on the application of biochar for contaminants removal from aqueous solutions. As an emerging sorbent with great potential, biochar has shown significant advantages such as the broad sources of feedstocks, easy preparation process, and favorable surface and structural properties. This review provides an overview of recent advances in biochar application in water and wastewater treatment, including a brief discussion of the involved sorption mechanisms of contaminants removal, as well as the biochar modification methods. Furthermore, environmental concerns of biochar that need to be paid attention to and future research directions are put forward to promote the further application of biochar in practical water and wastewater treatment.

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“…However, most of the traditionally produced have limited ability to sorb anionic species. Recently a new concept, engineered biochar has gained interest, in which engineered biochar is prepared by biochar surface impregnation with montmorillonite or other clay minerals [ 3 , 17 , 18 , 19 , 20 ]. Therefore, technetium in the most environmentally stable form—pertechnetate is sorbed, while others, mostly metals flow through this material if pH is smaller than approx.…”

Section: Introductionmentioning

confidence: 99%

Surface Complexation Models of Pertechnetate on Biochar/Montmorillonite Composite—Batch and Dynamic Sorption Study

et al. 2020

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The study summarizes the results of monitoring the properties of two types of sorbents, BC1 (biochar sample 1) and BC2a (biochar sample 2), prepared by pyrolysis of bamboo biomass (BC1) and as its composite with montmorillonite K10 (BC2a). The main goal was to study their applicability to the Tc (VII) separation from liquid wastes, using NH4ReO4 as a carrier. The research was focused on determining the sorbents surface properties (by XRF (X-ray fluorescence) method and potentiometric titration in order to determine the properties of surface groups—Chemical Equilibrium Model (CEM) and Ion Exchange Model (IExM) models were applied here). As well as monitoring Tc (VII) (+Re(VII)) sorption, especially to determine equilibrium isotherm, the influence of pH and kinetics. The subject of research was also the dynamics of sorption, including its mathematical–physical modeling. Both sorbents have good properties against Tc (VII), however BC2a, due to the presence of montmorillonite, is more advantageous in this respect. It has a higher sorption capacity and faster kinetic investigation. An important finding is that the optimal pH is 2–3, which is related not only to the protonation of surface groups (they have a positive charge), but also to the negative form of the existence of Tc (VII) and Re (VII): TcO4− and ReO4−.

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Production, characterization and adsorption studies of bamboo-based biochar/montmorillonite composite for nitrate removal

Cited by 128 publications

References 52 publications

Removal of Phosphorus from Wastewater by Different Morphological Alumina

Removal of Phosphorus from Wastewater by Different Morphological Alumina

Peer Review #1 of "Recent advances in biochar application for water and wastewater treatment: a review (v0.2)"

Surface Complexation Models of Pertechnetate on Biochar/Montmorillonite Composite—Batch and Dynamic Sorption Study

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