Synthesis, characteristics and mechanistic insight into the clays and clay minerals-biochar surface interactions for contaminants removal-A review

Arif, Muhammad; Liu, Guijian; Yousaf, Balal; Ahmed, Rafay; Irshad, Samina; Ashraf, Aniqa; Rehman, Muhammad Zia ur; Rashid, Muhammad Saqib

doi:10.1016/j.jclepro.2021.127548

Cited by 87 publications

(22 citation statements)

References 147 publications

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“…Clays are classified as hydrous aluminosilicate minerals, which comprise different mixtures of fine-grained clay minerals and clay-sized crystals of other minerals such as carbonates, quartz, and metal oxides. Clays have been employed as the natural materials to remove toxic contaminants in polluted aqueous systems and soil (Arif et al 2021). Clay minerals can be mined easily, non-toxic, lamellar structures, relatively low cost, and comparatively high surface area.…”

Section: Biochar-based Compositesmentioning

confidence: 99%

“…Unlike activated carbon, the pristine biochar has not shown potential in the sorption and eradication of contaminants, mainly due to its relatively low surface area and the effect of abiotic and/or biotic processes on the properties and elimination capacity for pollutants. Thus, there has been increasing attention on improving the surface area and mechanical characteristics of biochar via numerous modification techniques, including amination, surfactant modification, base treatment, acid treatment, magnetic modification, and composite with other materials (Arif et al 2021;Cheng et al 2021b;Li et al 2021b). In recent years, numerous biochar-based materials have been adopted as eco-friendly adsorbents to remove organic/inorganic contaminants from water and soil.…”

Section: Introductionmentioning

confidence: 99%

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Biochar for the removal of contaminants from soil and water: a review

Qiu

Liu

Ling

et al. 2022

Biochar

359

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Biochar shows significant potential to serve as a globally applicable material to remediate water and soil owing to the extensive availability of feedstocks and conducive physio-chemical surface characteristics. This review aims to highlight biochar production technologies, characteristics of biochar, and the latest advancements in immobilizing and eliminating heavy metal ions and organic pollutants in soil and water. Pyrolysis temperature, heat transfer rate, residence time, and type of feedstock are critical influential parameters. Biochar’s efficacy in managing contaminants relies on the pore size distribution, surface groups, and ion-exchange capacity. The molecular composition and physical architecture of biochar may be crucial when practically applied to water and soil. In general, biochar produced at relatively high pyrolysis temperatures can effectively manage organic pollutants via increasing surface area, hydrophobicity and microporosity. Biochar generated at lower temperatures is deemed to be more suitable for removing polar organic and inorganic pollutants through oxygen-containing functional groups, precipitation and electrostatic attraction. This review also presents the existing obstacles and future research direction related to biochar-based materials in immobilizing organic contaminants and heavy metal ions in effluents and soil. Graphical Abstract

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Section: Biochar-based Compositesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biochar for the removal of contaminants from soil and water: a review

Qiu

Liu

Ling

et al. 2022

Biochar

359

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“…MBC showed a maximum adsorption capacity of 34.72 mg P g −1 for PO 4 3− by the Langmuir model, which was attributed to the electrostatic attraction or ionic bonding between PO 4 3− and cations in the MBC samples such as Ca 2+ , Mg 2+ , Al 3+ , and Fe 3+ (Chen et al 2017). Additionally, exchangeable cations in the interlayer of montmorillonite, including Fe 2+ , Ca 2+ , and Mg 2+ , can balance the negative charges, thus effectively enhancing the active adsorption sites (Arif et al 2021). In fact, a variety of surface-modified biochar-clay composites were synthesized using hematite as a modifier and granulated into ~ 4 mm grains by a mixer granulator for water treatment processes (Zhu et al 2020).…”

Section: Introductionmentioning

confidence: 95%

Formable porous biochar loaded with La-Fe(hydr)oxides/montmorillonite for efficient removal of phosphorus in wastewater: process and mechanisms

Sun

Zhang

Xiao

et al. 2022

Biochar

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The development of biochar-based granule-like adsorbents suitable for scaled-up application has been attracting increasing attention in the field of water treatment. Herein, a new formable porous granulated biochar loaded with La-Fe(hydr)oxides/montmorillonite (LaFe/MB) was fabricated via a granulation and pyrolysis process for enhanced phosphorus (P) removal from wastewater. Montmorillonite acted as a binder that increased the size of the granulated biochar, while the use of Fe promoted the surface charge and facilitated the dispersion of La, which was responsible for selective phosphate removal. LaFe/MB exhibited rapid phosphate adsorption kinetics and a high maximum adsorption capacity (Langmuir model, 52.12 mg P g−1), which were better than those of many existing granulated materials. The desorption and recyclability experiments showed that LaFe/MB could be regenerated, and maintained 76.7% of its initial phosphate adsorption capacity after four adsorption cycles. The high hydraulic endurance strength retention rate of the developed material (91.6%) suggested high practical applicability in actual wastewater. Electrostatic attraction, surface precipitation, and inner-sphere complexation via ligand exchange were found to be involved in selective P removal over a wide pH range of 3–9. The thermodynamic parameters were determined, which revealed the feasibility and spontaneity of adsorption. Based on approximate site energy distribution analyses, high distribution frequency contributed to efficient P removal. The research results provide a new insight that LaFe/MB shows great application prospects for advanced phosphate removal from wastewater. Graphical Abstract

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“…Montmorillonite (MMT), a natural aluminomagnesium silicate clay, has attracted considerable attention due to its extensive application in biomedical areas, such as intestinal ailments, drug delivery, − and additive manufacturing. , MMT is composed of a three-layered lamellar structure with aluminum oxide octahedra in the middle and silicon oxygen tetrahedra on the top and bottom sides. , The highly ordered lattice arrangement and compact packing of tetrahedron and octahedron structures endow MMT characteristics of high cation exchange capacity and large surface area with excellent adsorption and drug loading properties. , Although some studies have revealed that MMT can adsorb bacteria and bacterial enterotoxins when taken as anti-inflammatory medicine, the antibacterial effect of MMT itself in vitro is actually weak. , …”

Section: Introductionmentioning

confidence: 99%

AIEgen Intercalated Nanoclay-Based Photodynamic/Chemodynamic Theranostic Platform for Ultra-Efficient Bacterial Eradication and Fast Wound Healing

Zhang

Zhou

et al. 2022

ACS Appl. Mater. Interfaces

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With the emergence and global spread of bacterial resistance, pathogenic bacterial infections have become a serious threat to human health. Thus, therapeutic strategies with highly antibacterial efficacy and a low tendency to induce drug resistance are strongly desired to combat bacterial infections. Here, an ultra-efficient photodynamic/chemodynamic theranostics platform is developed by intercalating an aggregation-induced emission (AIE) photosensitizer, TPCI, into the nanolayers of iron-bearing montmorillonite (MMT). The formed TPCI/MMT composite can not only perform efficient photodynamic therapy (PDT) through a burst generation of singlet oxygen (1O2) upon white light illumination but also continuously implement chemodynamic therapy (CDT) by converting endogenous hydrogen peroxide into highly toxic hydroxyl radicals (•OH) due to iron release. In addition, the fluorescence of TPCI/MMT can be activated due to the AIE feature of TPCI, which helps guide the location of the antimicrobials. The combination of such powerful bombs (PDT) and unremitting ambushes (CDT) in TPCI/MMT can synergistically and effectively eliminate bacteria and promote faster wound healing in vivo with good biocompatibility and low side effects. The smart and simple design of TPCI/MMT provides a representative paradigm for achieving efficient antimicrobials to combat the coming resistance crisis.

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Synthesis, characteristics and mechanistic insight into the clays and clay minerals-biochar surface interactions for contaminants removal-A review

Cited by 87 publications

References 147 publications

Biochar for the removal of contaminants from soil and water: a review

Biochar for the removal of contaminants from soil and water: a review

Formable porous biochar loaded with La-Fe(hydr)oxides/montmorillonite for efficient removal of phosphorus in wastewater: process and mechanisms

AIEgen Intercalated Nanoclay-Based Photodynamic/Chemodynamic Theranostic Platform for Ultra-Efficient Bacterial Eradication and Fast Wound Healing

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