Effective removal of Cd(<scp>ii</scp>) by sludge biochar supported nanoscale zero-valent iron from aqueous solution: characterization, adsorption properties and mechanism

Dai, Liang; Han, Tao; Ma, Guojun; Tian, Xia; Meng, Kai; Lei, Zhenle; Ren, Jing

doi:10.1039/d2nj01735k

Cited by 8 publications

(3 citation statements)

References 49 publications

(52 reference statements)

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“…Biochars that release anions such as OH − , SO 4 2− , CO 3 2− and PO 4 3− have demonstrated precipitation between the heavy metals and anions of surface groups of nZVI. In other work done by Dai et al ., the presence of Cd(II) in sludge biochar‐supported nZVI was discovered after the adsorption demonstrated precipitation and the formation of complexes 2 . During the adsorption process of Cd(II), the Cd(II) on the surface of sludge biochar‐supported nZVI was adsorbed in the form of Cd(OH) 2 precipitation, Cd‐Fe‐hydroxide precipitation or complexes.…”

Section: Adsorption Parameters and Mechanisms Of Metal Ions Onto Bioc...mentioning

confidence: 99%

“…Specifically, accessibility to clean water is a universal concern around the globe. As analyzed by several researchers, the aforementioned issues will remain a global issue because of the inaccessibility to freshwater for the next 50–100 years 1,2 . Generally, water pollution occurs mainly due to the presence of toxic contaminants, such as heavy metals, pesticides, dyes, by‐products of fertilizers and pathogens.…”

Section: Introductionmentioning

confidence: 99%

“…As analyzed by several researchers, the aforementioned issues will remain a global issue because of the inaccessibility to freshwater for the next 50-100 years. 1,2 Generally, water pollution occurs mainly due to the presence of toxic contaminants, such as heavy metals, pesticides, dyes, by-products of fertilizers and pathogens. Among the above-mentioned pollutants, the greatest contributor to contaminants are hazardous heavy metals.…”

Section: Introductionmentioning

confidence: 99%

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A review on preparation, surface enhancement and adsorption mechanism of biochar‐supported nano zero‐valent iron adsorbent for hazardous heavy metals

Awang

Salleh

Aziz

et al. 2022

J of Chemical Tech & Biotech

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Heavy metal pollution of water is a global concern, which adversely affects human health because of its resistance to biodegradation and thus its transmission in the food chain via bioaccumulation. Nano zerovalent iron (nZVI) is very effective for the removal of heavy metals and is cost effective in terms of production. However, the main problems of nZVI are agglomeration and ease of oxidation. Several stabilization materials have been implemented to limit the aggregation of nZVI, such as silica, activated carbon and biochar. In comparison, as a support material, biochar possesses a large surface area, high stability and strong adsorption capacity, as well as being obtainable from various types of materials. Thus, this work aims to establish the opportunities available on the use of biochar-supported nZVI in utilizing its ability to stabilize and immobilize the nZVI. This review also reports the preparation, modification and surface enhancement of biochar, nZVI and biochar-nZVI for practical use as adsorbents. This review shows that modifications of the nZVI surface can help in their stabilization and reduction of aggregation. Additionally, this review is able to increase one's understanding of heavy metal sorption behavior by biochar-supported nZVI as it is the important as heavy metal sorption is driven based on biochar-nZVI type and heavy metal species which involve numerous mechanisms, including physical binding, complexation, ion exchange, surface precipitation and electrostatic interactions. Furthermore, this research reviews the adsorption parameters, including the crucial adsorption mechanism of heavy metals onto biochar-nZVI; the reusability of the biochar-nZVI is also discussed in this work.

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Section: Adsorption Parameters and Mechanisms Of Metal Ions Onto Bioc...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A review on preparation, surface enhancement and adsorption mechanism of biochar‐supported nano zero‐valent iron adsorbent for hazardous heavy metals

Awang

Salleh

Aziz

et al. 2022

J of Chemical Tech & Biotech

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Synthesis and environmental applications of biochar-supported nano-zero-valent iron composites: a review

Zhong,

Lai,

Wang

et al. 2024

Environ Chem Lett

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Preparation of Hypercrosslinked Polymer-Based Sponge and its Application for the Removal of Non-Steroidal Anti-Inflammatory Drugs in Water Samples

Han

et al. 2022

Water Air Soil Pollut

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Effective removal of Cd(ii) by sludge biochar supported nanoscale zero-valent iron from aqueous solution: characterization, adsorption properties and mechanism

Abstract: Nanoscale zero-valent iron (nZVI) has a high chemical reactivity for heavy metals, but nZVI forms aggregate easily. In this study, a synthesis of sludge biochar supported nanoscale zero-valent iron (nZVI@SBC) by...

Cited by 8 publications

References 49 publications

A review on preparation, surface enhancement and adsorption mechanism of biochar‐supported nano zero‐valent iron adsorbent for hazardous heavy metals

A review on preparation, surface enhancement and adsorption mechanism of biochar‐supported nano zero‐valent iron adsorbent for hazardous heavy metals

Synthesis and environmental applications of biochar-supported nano-zero-valent iron composites: a review

Preparation of Hypercrosslinked Polymer-Based Sponge and its Application for the Removal of Non-Steroidal Anti-Inflammatory Drugs in Water Samples

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