Enhanced lanthanum adsorption by amine modified activated carbon

Iannicelli-Zubiani, Elena Maria; Stampino, Paola Gallo; Cristiani, Cinzia; Dotelli, Giovanni

doi:10.1016/j.cej.2018.01.154

Cited by 69 publications

(29 citation statements)

References 42 publications

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“…The proposed functionalization processes are targeted to improve the coordination properties of carbon species in order to capture more easily the pollutants in the aqueous solution. However, the molecules suggested for these purposes, for instance amine derivatives, can be very complex or intrinsically dangerous for both humans and environment [13].…”

Section: Introductionmentioning

confidence: 99%

Reduced Graphene Oxide Membranes as Potential Self-Assembling Filter for Wastewater Treatment

et al. 2020

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This work focuses on the investigation of the capability of reduced graphene oxide (rGO) filters to remove metals from various wastewater. The process to produce rGO membranes is reported and discussed, as well as their ability to capture ions in complex solutions, such as tap or industrial wastewater. Multi-ion solutions, containing Cu2+, Fe3+, Ni2+, and Mn2+ to simulate mine wastewater, or Ca2+ and Mg2+ to mimic drinkable water, were used as models. In mono-ionic solutions, the best capture efficiency values were proved for Ca2+, Fe3+, and Ni2+ ions, while a matrix effect was found for multi-ion solutions. However, interesting capture efficiencies were measured in the range of 30–90%, depending on the specific ion, for both single and multi-ion solutions. An attempt is proposed to correlate ions capture efficiency with ions characteristics, such as ionic radius or charge. Combining a satisfactory capture efficiency with low costs and ease of treatment unit operations, the approach here proposed is considered promising to replace other more complex and expensive filtration techniques.

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Section: Introductionmentioning

confidence: 99%

Reduced Graphene Oxide Membranes as Potential Self-Assembling Filter for Wastewater Treatment

et al. 2020

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“…Release tests were performed by contacting the La-containing organo-clays with HNO 3 solution at pH 1 under continuous stirring at room temperature, for 1.5 h, with a solid/liquid ratio of 0.026 g/mL [30].…”

Section: Methodsmentioning

confidence: 99%

Polyamine-Based Organo-Clays for Polluted Water Treatment: Effect of Polyamine Structure and Content

et al. 2019

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Hybrid materials based on clays and polyamines are supposed to be efficient heavy metals sorbents due to the well-known adsorption behaviour of the clay matrix and to the coordination properties of un-protonated amino groups. For this purpose, a montmorillonite clay was modified with three different aliphatic polyamines: L6 and L10 have a linear structure with six and ten amino groups, respectively, while B14 is a branched polyamine with fourteen amino groups. Initial amine concentration was the main parameter investigated and data were fitted with Langmuir and Freundlich models. Interaction mechanisms between clay and amines were deeply investigated by different experimental techniques such as X-ray powder diffraction (XRD), thermal analysis measurements (DTG), Fourier Transform Infrared Spectroscopy (FT-IR) and diffuse reflectance (NIR) spectroscopy. Experimental results showed that the amount of amines efficiently immobilized in the solid phase can be increased by increasing the initial concentration of polyamines in the clay modification process. These data were best fitted by Freundlich model, indicating a presence of surface sites of different nature. In the resulting hybrid materials, neither the accessibility of the NH/NH2 groups of the amines, nor the accessibility of the structural OH of the clay was hindered. Several preliminary tests in La ions’ uptake and release from aqueous solution were also carried out. In the conditions used for this study, total metal ion removal was achieved at sufficiently low linear amine loadings (i.e., 0.45 mmol/gclay for the small L6 amine), suggesting that these hybrid materials are promising for the proposed application in environmental remediation.

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“…The recovery of HMs from phytoremediation biomass ashes can be performed through pyrometallurgical processes [ 117 ], however these energy-intensive treatments are not suited to the low volumes of ashes produced. A more suitable approach is the recovery of metals via solid–liquid adsorption and desorption processes [ 118 ]. This process is suitable for treating small volumes of ashes, which are first treated with a digestion process in order to solubilize the HMs, and then processed to adsorb the valuable metals on a properly designed solid.…”

Section: Plant Reuse After Phytoremediationmentioning

confidence: 99%

Heavy-Metal Phytoremediation from Livestock Wastewater and Exploitation of Exhausted Biomass

Hejna

Onelli

Moscatelli

et al. 2021

IJERPH

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Sustainable agriculture is aimed at long-term crop and livestock production with a minimal impact on the environment. However, agricultural practices from animal production can contribute to global pollution due to heavy metals from the feed additives that are used to ensure the nutritional requirements and also promote animal health and optimize production. The bioavailability of essential mineral sources is limited; thus, the metals are widely found in the manure. Via the manure, metallic ions can contaminate livestock wastewater, drastically reducing its potential recycling for irrigation. Phytoremediation, which is an efficient and cost-effective cleanup technique, could be implemented to reduce the wastewater pollution from livestock production, in order to maintain the water conservation. Plants use various strategies for the absorption and translocation of heavy metals, and they have been widely used to remediate livestock wastewater. In addition, the pollutants concentrated in the plants can be exhausted and used as heat to enhance plant growth and further concentrate the metals, making recycling a possible option. The biomass of the plants can also be used for biogas production in anaerobic fermentation. Combining phytoremediation and biorefinery processes would add value to both approaches and facilitate metal recovery. This review focuses on the concept of agro-ecology, specifically the excessive use of heavy metals in animal production, the various techniques and adaptations of the heavy-metal phytoremediation from livestock wastewater, and further applications of exhausted phytoremediated biomass.

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Enhanced lanthanum adsorption by amine modified activated carbon

Cited by 69 publications

References 42 publications

Reduced Graphene Oxide Membranes as Potential Self-Assembling Filter for Wastewater Treatment

Reduced Graphene Oxide Membranes as Potential Self-Assembling Filter for Wastewater Treatment

Polyamine-Based Organo-Clays for Polluted Water Treatment: Effect of Polyamine Structure and Content

Heavy-Metal Phytoremediation from Livestock Wastewater and Exploitation of Exhausted Biomass

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