Layered double hydroxide–loaded biochar as a sorbent for the removal of aquatic phosphorus: behavior and mechanism insights

Bolbol, Hassan; Fekri, Majid; Hejazi-Mehrizi, Majid

doi:10.1007/s12517-019-4694-4

Cited by 55 publications

(24 citation statements)

References 51 publications

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“…In addition, the composite material was confirmed that the biochar successfully loaded to LDH. As similary reported by Bolbol et al [26] the presence of two unique vibration of LDH and biochar can assume that the composite process were successfully transformed. The nitrogen adsorption desorption isotherm on composite and starting materials was shown in Fig.…”

Section: Resultssupporting

confidence: 74%

Adsorptive Removal Methylene-Blue Using Zn/Al LDH Modified Rice Husk Biochar

Lesbani¹,

Siregar²,

Palapa³

et al. 2021

Pol. J. Environ. Stud.

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IntroductionThe presence of hazardous synthetic dyes in waste water released from industrial process such as cosmetic, textile, leather, painting, food, and drug industries is serious problem due to not only human health but also aquatic ecosystem [1]. Synthetic dyes are very toxic and carcinogenic due to difficult to degrade and stable under light and oxidation process, thus removal of dyes from wastewater is crucial [2]. Treatment to remove or to reduce concentration of dyes from wastewater has been

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Section: Resultssupporting

confidence: 74%

Adsorptive Removal Methylene-Blue Using Zn/Al LDH Modified Rice Husk Biochar

Lesbani¹,

Siregar²,

Palapa³

et al. 2021

Pol. J. Environ. Stud.

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“…Figure 7b depicts the variation in equilibrium solution pH after phosphate and nitrate adsorption onto B 5 MgAl composite. The equilibrium solution pH is higher than the initial pH values; 4-6 for phosphate and 6-8 for nitrate, which could be due to the ligand exchange of phosphate and nitrate with OH − on the surface of the B 5 MgAl LDH composite [27,40,48,50,51]. The structure of B 5 MgAl was partially destroyed at pH = 2 and, the released OH − from its structure slightly increased the equilibrium solution pH.…”

Section: Thermodynamic Modelingmentioning

confidence: 91%

“…The intensity of this appeared band after phosphate adsorption was more than that of nitrate adsorption, clarifying the higher adsorption capacity of B 5 MgAl composite toward phosphate than for nitrate. Previous studies reported that the intercalation of phosphate into the interlayer space of the MgAl LDH composite after the adsorption process results in a P-O stretching vibration leading to a distinct band noticed between 1030 and 1100 cm −1 [27,40,42,[47][48][49][50][51]. Accordingly, a shift of the band from 980 to 1000 cm −1 and the relatively stronger right shoulder of the peak at 1000 cm −1 after phosphate adsorption is due to the formation of mostly outer-sphere surface complexes and partially inner-sphere surface complexes on the B 5 MgAl composite [47].…”

Section: Thermodynamic Modelingmentioning

confidence: 99%

Comparative Adsorptive Removal of Phosphate and Nitrate from Wastewater Using Biochar-MgAl LDH Nanocomposites: Coexisting Anions Effect and Mechanistic Studies

et al. 2020

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In this study, date-palm biochar MgAl-augmented double-layered hydroxide (biochar–MgAl–LDH) nanocomposite was synthesized, characterized, and used for enhancing the removal of phosphate and nitrate pollutants from wastewater. The biochar–MgAl–LDH had higher selectivity and adsorption affinity towards phosphate compared to nitrate. The adsorption kinetics of both anions were better explained by the pseudo-first-order model with a faster removal rate to attain equilibrium in a shorter time, especially at lower initial phosphate-nitrate concentration. The maximum monolayer adsorption capacities of phosphate and nitrate by the non-linear Langmuir model were 177.97 mg/g and 28.06 mg/g, respectively. The coexistence of anions (Cl−, SO42−, NO3−, CO32− and HCO3−) negligibly affected the removal of phosphate due to its stronger bond on the nano-composites, while the presence of Cl− and PO43− reduced the nitrate removal attributed to the ions’ participation in the active adsorption sites on the surface of biochar–MgAl–LDH. The excellent adsorptive performance is the main synergetic influence of the MgAl–LDH incorporation into the biochar. The regeneration tests confirmed that the biochar–MgAl composite can be restored effortlessly and has the prospective to be reused after several subsequent adsorption-desorption cycles. The biochar-LDH further demonstrated capabilities for higher removal of phosphate and nitrate from real wastewater.

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“…(b) showed the di ractogram pattern of the biochar Bolbol et al, 2019. studied that the di raction pattern of biochar generally at the peak (002) which indicates the material is amorphous.Figure 2(d) showed the di ractogram pattern of the Ni/Al-BC composite having a di raction angle of 11.63 • which is characteristic of Ni/Al LDH and a di raction angle of 22.30 • which is characteristic of biochar.…”

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confidence: 99%

Structural Stability of Ni/Al Layered Double Hydroxide Supported on Graphite and Biochar Toward Adorption of Congo Red

Siregar

Palapa

Wijaya

et al. 2021

sci. technol. indones.

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In this research, Ni/Al layered double hydroxide (LDH) was modified by using co-precipitation method to generate Ni/Al-graphite (Ni/Al-GF) and Ni/Al-biochar (Ni/Al-BC). The adsorbents were applied to remove Congo Red from aqueous solution. The obtained samples were characterized by using XRD, FTIR, BET and TG-DTA. The XRD diffraction pattern of Ni/Al LDH, Ni/Al-GF, and Ni/Al-BC presented the formation of composite with decreasing crystallinity. The surface area modified LDHs was higher than the pristine materials, which was obtained 15.106 m2/g, 21.595 m2/g and 438.942 m2/g for Ni/Al-LDH, Ni/Al-GF, Ni/Al-BC respectively. The adsorption of Congo Red on the materials was tested at diferent parameters and the results exhibited that Congo Red adsorption on LDHs were pseudo-first-order (PFO) kinetic, spontaneous, endothermic and followed Langmuir model. The adsorbents removed Congo Red by high performance stability with adsorption capacity was 116.297 mg/g for Ni/Al-GF and 312.500 mg/g for Ni/Al-BC. These adsorption capacity was higher than the pristine LDH (61.728 mg/g). The regeneration process which carried out for five cycles showed that Ni/Al-GF and Ni/Al-BC have stable structures as reuse adsorbents for Congo Red from aqueous solution.

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Layered double hydroxide–loaded biochar as a sorbent for the removal of aquatic phosphorus: behavior and mechanism insights

Cited by 55 publications

References 51 publications

Adsorptive Removal Methylene-Blue Using Zn/Al LDH Modified Rice Husk Biochar

Adsorptive Removal Methylene-Blue Using Zn/Al LDH Modified Rice Husk Biochar

Comparative Adsorptive Removal of Phosphate and Nitrate from Wastewater Using Biochar-MgAl LDH Nanocomposites: Coexisting Anions Effect and Mechanistic Studies

Structural Stability of Ni/Al Layered Double Hydroxide Supported on Graphite and Biochar Toward Adorption of Congo Red

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