In-situ synchronous carbonation and self-activation of biochar/geopolymer composite membrane: Enhanced catalyst for oxidative degradation of tetracycline in water

Huang, Jiaqi; Li, Zhili; Zhang, Jiubing; Zhang, Yifan; Ge, Yuanyuan; Cui, Xuemin

doi:10.1016/j.cej.2020.125528

Cited by 59 publications

(19 citation statements)

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“…The comparative advantages of biochar are good adsorption properties toward pollutants [13], low price, and excellent availability. The binding energy between the biochar and pollutant depends on the chemical nature of both compounds.…”

Section: Introductionmentioning

confidence: 99%

Surface characterization of maize-straw-derived biochar and their sorption mechanism for Pb2+ and methylene blue

et al. 2020

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Biochar derived from straw is a potential low-cost adsorbent for metal ions and organic pollutants, but its practical application is still limited by the adsorption capacity. In this study, the correlation between the biochar's properties and pyrolysis temperature was explored. The adsorption mechanism was studied by monitoring the changes of biochar properties before and after adsorption using BET, SEM, XPS and FT-IR spectroscopy. The adsorption mechanism was revealed following the adsorption kinetics and the changes in biochar's properties before and after adsorption. The methylene blue (MB) and Pb 2+ adsorption removal efficiency reached 95% at the initial concentration of 125 and 500 mg/L, respectively. Physisorption, chemisorption, and pore filling mechanisms determined the adsorption process of MB and Pb 2+ on biochar. The Pb 2+ adsorption process was highly affected by chemical co-precipitation at higher pyrolysis temperatures. The appearance of tar particles increased the adsorption rate of Pb 2+. The biochar obtained at the pyrolysis temperature at 500, 800 and 900˚C proved to be applicable for Pb 2+ removal. Chemisorption and porosity dominated the MB adsorption, and biochars produced at pyrolysis temperatures of 200, 800 and 900˚C are potential materials for MB removal. This study provides optimal pyrolysis conditions for transforming maize straw into valuable, low-cost materials for the removal of different pollutants.

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Section: Introductionmentioning

confidence: 99%

Surface characterization of maize-straw-derived biochar and their sorption mechanism for Pb2+ and methylene blue

et al. 2020

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“…Compared to the lignin, the BSB remains the typical peaks at 1650, 1510, 1460, 1120 and 1040 cm -1 , confirming the ''core'' of lignin structure did not change during the synthetic process (Li et al 2015a, b). Specifically, the wide bands at 1650 cm -1 are associated with C=O stretching (Huang et al 2020), and the bands at 1510 and 1460 cm -1 are attributed to the aromatic skeletal C=C stretching, and the bands at 1120 and 1040 cm -1 are assigned to C-O stretching of ethers (Qin et al 2017). The new broad band at 1410 cm -1 in BSB is a characteristic signal of C-N (Ge et al 2015), indicating the amine/amino has been successfully introduced into the lignin matrix.…”

Section: Characterizationsmentioning

confidence: 99%

“…Lignin contains the functional groups such as phenolic hydroxyl group, alcoholic hydroxyl group, carboxyl group and methoxy group, which can be used to adsorb heavy metals (Ge and Li 2018). The structural characteristics of lignin depend on a number of factors including the botanical origin, the environmental conditions of growth and the conditions of extraction from the in situ lignin network (Huang et al 2020). Sugarcane bagasse (SCB) is an abundant natural solid lignocellulosic residue after extraction of juice from sugarcane stalks which usually contains * 20% of lignin.…”

Section: Introductionmentioning

confidence: 99%

A bowl-shaped biosorbent derived from sugarcane bagasse lignin for cadmium ion adsorption

Peng

2020

Cellulose

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Lignocellulosic materials have received wide interest in adsorption of contaminants in water due to their abundance, eco-friendliness, and low cost. However, the development of new adsorbents from lignocellulose with excellent performance is still a big challenge. In this work, a new bowl-shaped biosorbent (BSB) with surface functionality is prepared from lignin that is extracted from the abundant sugarcane bagasse. The product is characterized by scanning electron microscopy, infrared spectrum, thermo gravimetric analysis and N 2 adsorption techniques. The results show that the obtained BSB is obviously bowlshaped in microscale with an enlarged surface area, and contains numerous oxygen and nitrogen functional groups. It exhibits an enhanced adsorption capacity toward Cd 2? that is 3.2 times of the original lignin. The adsorption process of Cd 2? by the BSB is well fitted by the Freundlich isothermal model and the pseudo-second-order kinetic model, respectively. The adsorption mechanism involves surface complexation, ion-exchange, electrostatic attraction, chemical precipitation and physical adsorption, etc., among them, the surface complexation is the rate-controlling step. Moreover, it shows a good reusability during five repeated cycling for Cd 2? adsorption.

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“…In recent times, on account of the significant attributes, such as a simple method, low-cost, environ-friendly nature, higher competence and mild micro-spheres synthesis method, geopolymers are successfully developed and commonly used as adsorbents, inorganic membranes, catalysts and for the immobilization of dangerous metal ions. Adsorption is regarded as the most efficient, uncomplicated and widespread technique for water decontamination [ 116 , 117 , 118 , 119 , 120 ]. Undeniably, activated carbon is the standard adsorbent material and is well-known as the most utilized adsorbent for water and wastewater treatment with an excellent demonstration of higher adsorption competencies for the removal of heavy metal cations, but its use gets hindered due to its comparatively high cost [ 121 ].…”

Section: Applications Of Geopolymers For Water and Wastewater Treatmentmentioning

confidence: 99%

A State-of-the-Art Review on Innovative Geopolymer Composites Designed for Water and Wastewater Treatment

Luhar

Abdullah

et al. 2021

Materials

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There is nothing more fundamental than clean potable water for living beings next to air. On the other hand, wastewater management is cropping up as a challenging task day-by-day due to lots of new additions of novel pollutants as well as the development of infrastructures and regulations that could not maintain its pace with the burgeoning escalation of populace and urbanizations. Therefore, momentous approaches must be sought-after to reclaim fresh water from wastewaters in order to address this great societal challenge. One of the routes is to clean wastewater through treatment processes using diverse adsorbents. However, most of them are unsustainable and quite costly e.g. activated carbon adsorbents, etc. Quite recently, innovative, sustainable, durable, affordable, user and eco-benevolent Geopolymer composites have been brought into play to serve the purpose as a pretty novel subject matter since they can be manufactured by a simple process of Geopolymerization at low temperature, lower energy with mitigated carbon footprints and marvellously, exhibit outstanding properties of physical and chemical stability, ion-exchange, dielectric characteristics, etc., with a porous structure and of course lucrative too because of the incorporation of wastes with them, which is in harmony with the goal to transit from linear to circular economy, i.e., “one’s waste is the treasure for another”. For these reasons, nowadays, this ground-breaking inorganic class of amorphous alumina-silicate materials are drawing the attention of the world researchers for designing them as adsorbents for water and wastewater treatment where the chemical nature and structure of the materials have a great impact on their adsorption competence. The aim of the current most recent state-of-the-art and scientometric review is to comprehend and assess thoroughly the advancements in geo-synthesis, properties and applications of geopolymer composites designed for the elimination of hazardous contaminants viz., heavy metal ions, dyes, etc. The adsorption mechanisms and effects of various environmental conditions on adsorption efficiency are also taken into account for review of the importance of Geopolymers as most recent adsorbents to get rid of the death-defying and toxic pollutants from wastewater with a view to obtaining reclaimed potable and sparkling water for reuse offering to trim down the massive crisis of scarcity of water promoting sustainable water and wastewater treatment for greener environments. The appraisal is made on the performance estimation of Geopolymers for water and wastewater treatment along with the three-dimensional printed components are characterized for mechanical, physical and chemical attributes, permeability and Ammonium (NH4+) ion removal competence of Geopolymer composites as alternative adsorbents for sequestration of an assortment of contaminants during wastewater treatment.

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In-situ synchronous carbonation and self-activation of biochar/geopolymer composite membrane: Enhanced catalyst for oxidative degradation of tetracycline in water

Cited by 59 publications

References 59 publications

Surface characterization of maize-straw-derived biochar and their sorption mechanism for Pb2+ and methylene blue

Surface characterization of maize-straw-derived biochar and their sorption mechanism for Pb2+ and methylene blue

A bowl-shaped biosorbent derived from sugarcane bagasse lignin for cadmium ion adsorption

A State-of-the-Art Review on Innovative Geopolymer Composites Designed for Water and Wastewater Treatment

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