Metal ion adsorption from wastewater by g-C3N4 modified with hydroxyapatite: a case study from Sarcheshmeh Acid Mine Drainage

Beygli, Ramtin Agha; Mohaghegh, Neda; Rahimi, Esmaeil

doi:10.1007/s11164-018-03733-9

Cited by 36 publications

(15 citation statements)

References 37 publications

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“…This claim is supported by the results obtained by Beygli et al (2019) who also observed that adsorption of AMD derived heavy metals such as Cu 2+ , Zn 2+ and Pb 2+ onto hydroxyapatite modified graphitic carbon nitrite (Hap (g-C 3 N 4 ) could be re-used for up to 12 cycles. Similarly, Vilardi et al (2018) observed that the olive stones coated with iron-based nanoparticles could be used for up to 5 times.…”

Section: Nanosorbentssupporting

confidence: 70%

Recent developments in materials used for the removal of metal ions from acid mine drainage

Mokgehle

Tavengwa

2021

Appl Water Sci

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Acid mine drainage is the reaction of surface water with sub-surface water located on sulfur bearing rocks, resulting in sulfuric acid. These highly acidic conditions result in leaching of non-biodegradeable heavy metals from rock which then accumulate in flora, posing a significant environmental hazard. Hence, reliable, cost effective remediation techniques are continuously sought after by researchers. A range of materials were examined as adsorbents in the extraction of heavy metal ions from acid mine drainage (AMD). However, these materials generally have moderate to poor adsorption capacities. To address this problem, researchers have recently turned to nano-sized materials to enhance the surface area of the adsorbent when in contact with the heavy metal solution. Lately, there have been developments in studying the surface chemistry of nano-engineered materials during adsorption, which involved alterations in the physical and chemical make-up of nanomaterials. The resultant surface engineered nanomaterials have been proven to show rapid adsorption rates and remarkable adsorption capacities for removal of a wide range of heavy metal contaminants in AMD compared to the unmodified nanomaterials. A brief overview of zeolites as adsorbents and the developent of nanosorbents to modernly applied magnetic sorbents and ion imprinted polymers will be discussed. This work provides researchers with thorough insight into the adsorption mechanism and performance of nanosorbents, and finds common ground between the past, present and future of these versatile materials.

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Section: Nanosorbentssupporting

confidence: 70%

Recent developments in materials used for the removal of metal ions from acid mine drainage

Mokgehle

Tavengwa

2021

Appl Water Sci

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“…The values of R L > 1 and R L ¼ 1, as well as 0 < R L < 1 and R L ¼ 0 indicate unsuitable, linear, suitable, and irreversible processes, respectively. [42][43][44][45][46] Moreover, the Freundlich model relies on the assumption that there exist heterogeneous adsorptive energies on the surface of the adsorbent. This isotherm was considered as the multi-layer adsorption with possible physisorption and chemisorption.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Synthesis and characterization of AFe₂O₄ (A: Ni, Co, Mg)–silica nanocomposites and their application for the removal of dibenzothiophene (DBT) by an adsorption process: kinetics, isotherms and experimental design

et al. 2021

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“…AMD has a pH < 3, and contains high concentrations of toxic elements, such as heavy metal ions, which cannot be reused [3,4]. If AMD is discharged into the environment without treatment, it can directly harm humans, animals, and plants [5,6], especially when it contains heavy metals like Pb(II), Cd(II), and Cr(III) [7,8]. Highly efficient synergistic treatment methods and novel and cheap protective materials against AMD for the mining environment are a topic of cutting-edge research in academia and practice [9,10].…”

Section: Introductionmentioning

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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Metal ion adsorption from wastewater by g-C3N4 modified with hydroxyapatite: a case study from Sarcheshmeh Acid Mine Drainage

Cited by 36 publications

References 37 publications

Recent developments in materials used for the removal of metal ions from acid mine drainage

Recent developments in materials used for the removal of metal ions from acid mine drainage

Synthesis and characterization of AFe₂O₄ (A: Ni, Co, Mg)–silica nanocomposites and their application for the removal of dibenzothiophene (DBT) by an adsorption process: kinetics, isotherms and experimental design

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

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Metal ion adsorption from wastewater by g-C3N4 modified with hydroxyapatite: a case study from Sarcheshmeh Acid Mine Drainage

Cited by 36 publications

References 37 publications

Recent developments in materials used for the removal of metal ions from acid mine drainage

Recent developments in materials used for the removal of metal ions from acid mine drainage

Synthesis and characterization of AFe2O4 (A: Ni, Co, Mg)–silica nanocomposites and their application for the removal of dibenzothiophene (DBT) by an adsorption process: kinetics, isotherms and experimental design

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

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Synthesis and characterization of AFe₂O₄ (A: Ni, Co, Mg)–silica nanocomposites and their application for the removal of dibenzothiophene (DBT) by an adsorption process: kinetics, isotherms and experimental design