Efficient removal of priority, hazardous priority and emerging pollutants with Prunus armeniaca functionalized biochar from aqueous wastes: Experimental optimization and modeling

Sekulić, Maja Turk; Pap, Sabolč; Stojanović, Zoran; Bošković, Nikola; Radonić, Jelena; Knudsen, Tatjana Šolević

doi:10.1016/j.scitotenv.2017.09.082

Cited by 67 publications

(17 citation statements)

References 74 publications

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“…Undoubtedly, adsorption capacity is a crucial parameter for adsorbents. Various studies have been conducted to develop novel adsorbents with efficient adsorption performance [38–40]. The comparison of SBC and MSBC adsorption capacities with various dosages for Ni removal is presented in Fig 2.…”

Section: Resultsmentioning

confidence: 99%

“…Obviously, the experimental data was well fitted by the Langmuir model with an R 2 value of 0.9930, while that of the Freundlich model was 0.9821. Actually, the adsorption path of the Langmuir model was believed to be monolayer sorption on a homogeneous sorption surface [40]. Nevertheless, the Freundlich model can be regard as non-ideal sorption on a heterogeneous surface as well as multilayer sorption [40].…”

Section: Resultsmentioning

confidence: 99%

“…Actually, the adsorption path of the Langmuir model was believed to be monolayer sorption on a homogeneous sorption surface [40]. Nevertheless, the Freundlich model can be regard as non-ideal sorption on a heterogeneous surface as well as multilayer sorption [40]. As mentioned above, the R 2 value of the Langmuir model was slightly higher than that of the Freundlich model.…”

Section: Resultsmentioning

confidence: 99%

“…Desorption attempts could be applied to recycle the metal ions and regenerate the saturated adsorbents. Thermal activation and acid solution were reported as regeneration methods based on previous literatures [40, 44]. High energy requirement and adsorbent loss were noticed in thermal activation attempts of the saturated adsorbent [44].…”

Section: Resultsmentioning

confidence: 99%

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Highly efficient nickel (II) removal by sewage sludge biochar supported α-Fe2O3 and α-FeOOH: Sorption characteristics and mechanisms

Yang

Xue

et al. 2019

PLoS ONE

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A novel approach was employed to load α-Fe 2 O 3 and α-FeOOH onto sewage sludge biochar (SBC) with the purpose of efficient nickel (Ni) removal. A high Ni(II) adsorption capacity of 35.50 mg·g -1 in 100 ppm Ni(II) solution with 10 mg modified sewage sludge biochar (MSBC) was achieved. The adsorption kinetic and isotherm were fitted well by the pseudo-second-order model and the Langmuir model, respectively. The optimal pH was found around a neutral pH of 7. The adsorption mechanisms of Ni(II) onto MSBC were described as the synergistic effects of electrostatic attraction, ion exchange, inner-sphere complexation and co-precipitation. The initial rapid adsorption phenomenon could be attributed to electrostatic attraction and ion exchange, and then inner-sphere complexation and co-precipitation acted as a crucial role in the following step. The remarkable performance of MSBC provides an effective waste utilization approach to simultaneous sewage sludge recycle and Ni removal from aqueous solution.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Highly efficient nickel (II) removal by sewage sludge biochar supported α-Fe2O3 and α-FeOOH: Sorption characteristics and mechanisms

Yang

Xue

et al. 2019

PLoS ONE

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“…With increasing waste discharges by anthropogenic activities, a large number of rivers have been severely contaminated worldwide (Li et al 2013;Guan et al 2016;Sekulić et al 2018), which has become a major environmental concern. A considerable amount of rivers are polluted by heavy metals and metalloids discharged from various industrial processes such as metal smelting and battery manufacture (Feng et al 2004;Chen et al 2009).…”

Section: Introductionmentioning

confidence: 99%

A comparison study on heavy metal/metalloid stabilization in Maozhou River sediment by five types of amendments

et al. 2019

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Purpose River sediment pollution by heavy metals/metalloids has attracted widespread attention due to a serious threat to the ecosystem and human health. As an effective and economical alternative, the stabilization method was considered by previous studies for the remediation of sediments polluted by metals/metalloids. However, a comprehensive study is required for an extensive comparison on the effects of metal/metalloid immobilization based on the application of different materials as sediment amendments. Materials and methods In this study, the Maozhou River was selected as the study area, and the stabilization method was applied for the remediation of the river sediment polluted by metals and metalloids. Five materials (CaCO 3 , Ca(OH) 2 , zeolite, kaolin, FeCl 2) were selected as amendments for the metal/metalloid stabilization in the collected sediment. A modified BCR procedure was employed for the speciation analysis of heavy metals and metalloid in the sediment before and after remediation. A TCLP (toxicity characteristic leaching procedure) investigation was performed to further evaluate the immobilization of heavy metals in acidic environment. Results and discussion The sediment of the Maozhou River was heavily polluted by heavy metals and metalloid. The speciation of As, Pb, Cr, and Mn mainly exists as residual fraction (F4), while that of Ni, Cu, and Zn was identified as exchangeable metal and carbonate-associated fraction (F1) and fraction associated with Fe-Mn oxides (F2). Moreover, the F2 fraction of Co was observed as the major speciation. Through the application of five materials (CaCO 3 , Ca(OH) 2 , zeolite, kaolin, FeCl 2) as sediment amendments, the metal/metalloid speciation was transferred into F4. When five amendments were compared, the stabilization effect can be ordered as CaCO 3 > zeolite > FeCl 2 > kaolin > Ca(OH) 2 based on the modified BCR results. TCLP results showed that using Ca(OH) 2 and CaCO 3 as amendments can significantly reduce the metal leachability in an acidic environment, while zeolite is effective for most of the heavy metals and metalloid. Conclusions The results showed that the sediment of the Maozhou River was seriously polluted by a variety of heavy metals and metalloids. This study provided extensive information on the speciation of metals or metalloid and the effect of various amendments on metals and metalloid stabilization, which can be of vital importance for further remediation of metal/metalloid-polluted sediment.

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EDTA functionalized pine needle biochar (EDTA@BC); a valorized bio‐material for removal of Ni(II) from aqueous solution

Rasheed,

Kayani

et al. 2024

Microscopy Res & Technique

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The preparation of ethylenediaminetetraacetic acid (EDTA) functionalized pine needles biochar (EDTA@BC) as a low‐cost active adsorbent and its effectiveness in removing Ni(II) from aqueous solution at various conditions is reported in this paper. First, alkali activation was selected to render the pine needle biochar with an excellent porous structure and increased concentration of hydroxyl groups to facilitate grafting. Subsequently, a simple method was utilized to graft EDTA onto the biochar. The prepared EDTA@BC was characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and energy dispersive x‐ray spectrometry (EDX). Batch adsorption studies were conducted to assess the impact of various parameters such as solution pH, adsorbent dosage, adsorbate volume, and shaking time on the removal efficiency of Ni(II). At pH 6, 100 mg dosage, 4 mL of adsorbate volume, and 10 min of shaking time, the maximum removal efficiency of Ni(II) was observed to be 89%. EDTA@BC showed reasonable sorption performance still after the third cycle of regeneration. The effect of interfering ions such as Pb, Cr, Cu, and Hg was evaluated, resulting a decrease of 69%, 78%, 76%, and 68%, respectively, in its sorption capacity. The Langmuir model provided a better fit for Ni(II) in the concentration range of 0.1–2000 ppm under optimized conditions, with qmax of 46.69 ± 1.031 mg/g and KL of 0.001, compared with the Freundlich isotherm, which yielded n = 0.234 and χ2 = 2.7899, Temkin isotherm (R2 = 0.9520), and Redlich‐Peterson isotherm (R2 = 0.9725). The removal of Ni(II) by EDTA@BC was found to be the pseudo‐second‐order kinetics. Thermodynamic studies indicated adsorption process to be endothermic and nonspontaneous. Hence, a sustainable valorized bio‐material (EDTA@BC) is prepared having better sorption efficiency of Ni(II) from aqueous solution with possible wide applicability.Research Highlights New EDTA functionalized indigenous pine needles biochar (EDTA@BC) was prepared. This low‐cost active adsorbent found effective in removing Ni(II) from aqueous solution. FTIR, SEM, and EDX proved synthesis and uptake of Ni(II) from aqueous solution. Ni(II) removal, regeneration, interfering and adsorption studies were performed by UV–Vis spectroscopy.

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Efficient removal of priority, hazardous priority and emerging pollutants with Prunus armeniaca functionalized biochar from aqueous wastes: Experimental optimization and modeling

Cited by 67 publications

References 74 publications

Highly efficient nickel (II) removal by sewage sludge biochar supported α-Fe2O3 and α-FeOOH: Sorption characteristics and mechanisms

Highly efficient nickel (II) removal by sewage sludge biochar supported α-Fe2O3 and α-FeOOH: Sorption characteristics and mechanisms

A comparison study on heavy metal/metalloid stabilization in Maozhou River sediment by five types of amendments

EDTA functionalized pine needle biochar (EDTA@BC); a valorized bio‐material for removal of Ni(II) from aqueous solution

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