Magnetic natural composite Fe3O4-chitosan@bentonite for removal of heavy metals from acid mine drainage

Feng, Guorui; Ma, Jinyao; Zhang, Xiaopeng; Zhang, Qingfang; Xiao, Yuqiang; Ma, Qingliang; Wang, Shaobin

doi:10.1016/j.jcis.2018.11.087

Cited by 135 publications

(34 citation statements)

References 49 publications

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“…However, neutralization precipitation requires a large amount of chemical agents, such as neutralizer and flocculent [23,24], which leads to difficulties in solid-liquid separation and high processing costs [25,26]. Besides various adsorbent materials, activated carbon is frequently used for adsorption, but has a low adsorption capacity for heavy metal ions, has high costs, and cannot neutralize acid [27][28][29]. At present, most treatments use a single method, and the treatment effect is poor.…”

mentioning

confidence: 99%

Experimental Study on the Optimum Preparation of Bentonite–Steel Slag Composite Particles

Zhan

Xiao

2019

Sustainability

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Novel multifunctional adsorbent bentonite-steel slag composite particles (BSC) were developed for highly efficient and synergistic treatment of heavy metal ions in acid mine drainage (AMD). Single-factor experiments were performed to examine the influence of different parameters on the adsorption effect, alkalinity release quantity, and loss rate of the composite particles. Based on these results, an L9(4 3 ) orthogonal experiment was carried out, and the optimum levels and order of the factors were determined by range analysis. Finally, the optimum preparation process of the composite particles was determined: a bentonite-steel slag proportion of 5:5, Na 2 CO 3 content of 5%, aging time of 12 h, calcination particle size of 2 mm, calcination temperature of 500 • C, and calcination time of 60 min. The isothermal adsorption of optimum BSC fit well with Langmuir and Brunauer-Emmett-Teller (BET) isotherms (R 2 R 2 > 0.997). A synergistic adsorption-coagulation effect occurs, leading to the appearance of multiple layers locally on the surface of BSC, which satisfies the BET model. To understand the preparation mechanism of the BSC, bentonite, steel slag, uncalcined BSC, and the optimum BSC were characterized using scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) surface area analysis, X-ray powder diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR). The results indicate that calcination led to an increase in the average pore radius, total pore volume, and specific surface area (S BET ) in the optimum BSC; numerous pores were present on its layered surface. Although the layer spacing increased after calcination, the structure of the dioctahedra remained unchanged. Exchangeable Na + , montmorillonite, and alkaline components were present between the optimum BSC layers. Water and impurities were removed after calcination. The BSC not only released an alkalinity-neutralising acid but also induced a synergistic adsorption-coagulation effect that removed heavy metal ions. It is an excellent multifunctional protective material for the mining environment, that can treat AMD-containing heavy metal ions. Sustainability 2020, 12, 18 2 of 27 Current techniques for treating AMD containing heavy metals include the neutralization precipitation [11], electrochemical [12], membrane separation [13-15], microbial [16,17], constructed wetland [18], and adsorption [19,20] methods. Neutralization precipitation and adsorption are widely used [21,22]. However, neutralization precipitation requires a large amount of chemical agents, such as neutralizer and flocculent [23,24], which leads to difficulties in solid-liquid separation and high processing costs [25,26]. Besides various adsorbent materials, activated carbon is frequently used for adsorption, but has a low adsorption capacity for heavy metal ions, has high costs, and cannot neutralize acid [27][28][29]. At present, most treatments use a single method, and the treatment effect is poor. If two methods are connected in series, the process flow is long,...

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confidence: 99%

Experimental Study on the Optimum Preparation of Bentonite–Steel Slag Composite Particles

Zhan

Xiao

2019

Sustainability

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“…Magnetic composites Fe3O4-chitosan-bentonite (Fe3O4-CS-BT), synthesized natural materials can be applied to restore acid mine drainage for the disposal of heavy metals, especially Cr(VI) in the fluid was examined (Feng et al, 2019). The findings of this study showed that Fe3O4-CS-BT composite could function optimally at pH 2.0 and can be used repeatedly by adjusting the magnetic field.…”

Section: Metal Ion Wastementioning

confidence: 98%

“…A summarized list of those aforementioned metal ion waste adsorbed by chitosan can be seen in Table 1 below. (Dima et al, 2015;Feng et al, 2019;Yimin Huang et al, 2018;Kim et al, 2015;Lasindrang et al, 2015;Nair et al, 2014;Noralia & Dina Kartika, 2013;Samuel et al, 2019;Zulfi et al, 2014) Cs + (Wang et al, 2019;Yang et al, 2016) Pb (II) (Nuralam, Endoraza & Arbi, 2012;Susilowati, Endang & Mahatmanti, 2018;Utami, Umi Barorh Lili Irawati, Utami, 2011;Yan et al, 2018;Zhang et al, 2018) Fe (Hui et al, 2018;Nuralam, Endoraza & Arbi, 2012;Nurdin & Maulana, 2016) Cu (II) (Dandil et al, 2019;Liu et al, 2016;Susilowati, Endang & Mahatmanti, 2018)…”

Section: Metal Ion Wastementioning

confidence: 99%

Industrial Application of Chitosan as Promising Material for Wastewater Purification: A Review

Belgis¹

2020

CSID-JID

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The rapid growth of the industry is giving positive effects for humans by providing daily needs and supporting economic development. However, the industrial process also releases pollution to the environment, which can cause water scarcity, biodiversity loss, and climate change. Removing these pollutants from various industrial wastes is a requirement for ensuring proper water quality for human consumption, agricultural use, and environmental safety. This work aims to explain the use of natural resources as a source of valuable compounds that can be used in wastewater treatment, particularly in Indonesia, by adopting a literature study method reviewing both national and international references. Chitosan is an effective bio-absorbent pollutant because of its high level of deacetylation and free amino groups, making it polycationic which is capable of being bound to metals, proteins, and dyes. Chitosan membranes can be applied only with chitosan material and composites: chitosan-Polyethylene Glycol (PEG), chitosan-Poly Vinyl Alcohol, chitosan-biosilica, chitosan-PVA-silica, chitosan-alginate, chitosan-cellulose, and chitosan-silica. Chitosan has the ability as a coagulant and reducing water turbidity. Chitosan can absorb metal ion (Cr (VI), Cs+, Pb(II), Fe, Cu(II)), dyes (anthraquinone dyes, brilliant blue, yellow dye, methylene blue, disperse orange, disperse blue, rhodamine B), drug residue, and hazardous materials, and can be used as raw material or in a film form. Since there is a high abundance of chitosan raw material in Indonesia, it is supposed to be able to support the application of chitosan as a natural purifying agent considering its high ability to absorb heavy metal and some dangerous materials.

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“…The results indicated that carboxymethyl cellulose-immobilized magnetite NPs displayed increased adsorption for lead ions. Guorui et al, [222] synthesized magnetite-chitosan@ bentonite (Fe3O4-CS@BT) composites to remediate acid mine drainage (AMD) for heavy metal removal. The supreme adsorption capacity of Cr (VI) elimination was reported to be 62 mg.g -1 .…”

Section: Magnetite (Fe3o4)mentioning

confidence: 99%

Insight on water remediation application using magnetic nanomaterials and biosorbents

Maksoud

Elgarahy

Farrell

et al. 2020

Coordination Chemistry Reviews

233

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Adsorption to date is the most effective and utilized technology globally to remove several pollutants in wastewater. In this approach, many adsorbents have been synthesized, tested and used for the elimination and separation of the contaminants such as radionuclides, heavy metals, dyes and pharmaceutical compounds both at lab and industrial scale. However, there are many challenges to adsorption processes such as reducing the high cost, through means of separation of suspending adsorbents to be used again, as well as the ease to synthesize. Two methods that have shown promising results and gained significant interest is that of magnetic nanomaterials and biosorbents due to their effective, safe, eco-friendly, low cost and low-energy intensive material properties. Magnetic nanomaterials act as efficient adsorbents due to their ease of removal of contaminants from wastewater using an applied magnetic field but also their advantageous surface charge and redox activity characteristics. On the other hand, biosorbents have a synergistic effect with their efficient adsorption capacity to remove contaminants, high abundance and participation in waste minimization, helping alleviate ecological and environmental problems. This review highlights, discusses and reports on the state-of-the-art of these two promising routes to adsorption and provides indications as to what are the optimum materials for utilization and insight into their efficiency, reusability and practicality for the removal of pollutants from wastewater streams. Some of the main material focuses are zero-valent iron, iron oxides, spinel ferrites, natural and waste-based biosorbents.

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Magnetic natural composite Fe3O4-chitosan@bentonite for removal of heavy metals from acid mine drainage

Cited by 135 publications

References 49 publications

Experimental Study on the Optimum Preparation of Bentonite–Steel Slag Composite Particles

Experimental Study on the Optimum Preparation of Bentonite–Steel Slag Composite Particles

Industrial Application of Chitosan as Promising Material for Wastewater Purification: A Review

Insight on water remediation application using magnetic nanomaterials and biosorbents

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