Phosphate adsorption from wastewater using ZnAl-LDO-loaded modified banana straw biochar

Jiang, Yanhong; Li, Anyu; Deng, Hua; Ye, Chenghui; Li, Yi

doi:10.1007/s11356-019-05183-1

Cited by 57 publications

(15 citation statements)

References 29 publications

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“…The pretreatment of the material was performed in the same manner as in a previous study . Banana straw was washed, cut into sections, dried, crushed, passed through a 30-mesh sieve, and sealed in a Ziploc bag for later use.…”

Section: Methodsmentioning

confidence: 99%

“…The pretreatment of the material was performed in the same manner as in a previous study. 55 Banana straw was washed, cut into sections, dried, crushed, passed through a 30mesh sieve, and sealed in a Ziploc bag for later use. Then, a 0.2 mol/L aluminum chloride solution and a 1 mol/L zinc chloride solution were prepared in an ethanol/water (1:3) solution.…”

Section: Methodsmentioning

confidence: 99%

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Strong Adsorption of Phosphorus by ZnAl-LDO-Activated Banana Biochar: An Analysis of Adsorption Efficiency, Thermodynamics, and Internal Mechanisms

Deng

et al. 2021

ACS Omega

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Zn–Al layered bimetallic composites were prepared by ethanol strengthening and co-precipitation using banana straw as a raw material. A high-efficiency phosphorus adsorbent (ZnAl-LDO-BC) was obtained by calcination at a high temperature. The kinetics and thermodynamics of phosphorus adsorption on ZnAl-LDO-BC were then studied. The results showed that the adsorption process of ZnAl-LDO-BC corresponds with the pseudo-second-order (PSO) kinetic equation and the Langmuir model. The theoretical maximum adsorption capacity of ZnAl-LDO-BC is 111.11 mg/g (at 45 °C, 500 mg/L phosphorus initial concentration). The influence of anions on phosphorus adsorption decreased in strength in the following order: CO3 2– > SO4 2– > NO3 –. Scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), Fourier transform infrared (FTIR) spectroscopy, and X-ray diffraction (XRD) were used to characterize the adsorption of phosphorus on ZnAl-LDO-BC and showed that ZnAl-LDO-BC can efficiently adsorb phosphorus. The adsorption mechanism utilizes both O–H and C–H on the surface of ZnAl-LDO-BC for the adsorption of PO4 3–, forming Zn3(PO4)2·4H2O via complexation precipitation; additionally, biochar surface adsorption and interlayer adsorption are indispensable forms of phosphate adsorption. With the systematic study of phosphorus adsorption by ZnAl-LDO-BC, a novel green technology was developed for addressing phosphorus pollution.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Strong Adsorption of Phosphorus by ZnAl-LDO-Activated Banana Biochar: An Analysis of Adsorption Efficiency, Thermodynamics, and Internal Mechanisms

Deng

et al. 2021

ACS Omega

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“…In 2019, Qing Liang Cui et al 2019 [32] investigated magnetic biochar/Mg-Al layered double hydroxide composite and reported relatively higher adsorption capacity as compared to other magnetic adsorbents, with moderate 51.43% removal efficiency. Yan-Hong Jiang et al [33] loaded ZnAl-LDH on to modified banana straw biochar via a hydrothermal process and demonstrated significant improvement in phosphorus removal. These studies indicated that the intercalation of LDHs into biochar could significantly improve the uptake of phosphate.…”

Section: Introductionmentioning

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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“…Furthermore, the IPD fitting correlation coefficients for the six biochars do not pass through the origin, which indicates that IPD is not the only determining factor and the adsorption process also includes external diffusion and surface adsorption. 26 A comparison of the C values in Table 2 indicates that the magnitude of the boundary effect of the adsorption heavy metals follows the order: BSB > CSB > TSB > CFSB > FSB > MSB, which corresponds to the order of the adsorption capacity.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

Superefficient Removal of Heavy Metals from Wastewater by Mg-Loaded Biochars: Adsorption Characteristics and Removal Mechanisms

Deng

Yan

et al. 2020

Langmuir

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Six types of biochar (BSB, CSB, FSB, CFSB, MSB, and TSB) were prepared from different raw materials by loading magnesium ions (Mg 2+ ) via an impregnation process. The adsorption kinetics and thermodynamics of heavy metals at high concentrations were analyzed. The adsorption mechanisms were investigated by zeta potential, scanning electron microscopy− energy-dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and inductively coupled plasma−atomic absorption spectroscopy analyses. The adsorption of heavy metals by BSB, CSB, FSB, CFSB, MSB, and TSB conformed to the Langmuir model and PS-order. The maximum theoretical saturation adsorption capacities for Cd(II), Cu(II), and

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Phosphate adsorption from wastewater using ZnAl-LDO-loaded modified banana straw biochar

Cited by 57 publications

References 29 publications

Strong Adsorption of Phosphorus by ZnAl-LDO-Activated Banana Biochar: An Analysis of Adsorption Efficiency, Thermodynamics, and Internal Mechanisms

Strong Adsorption of Phosphorus by ZnAl-LDO-Activated Banana Biochar: An Analysis of Adsorption Efficiency, Thermodynamics, and Internal Mechanisms

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

Superefficient Removal of Heavy Metals from Wastewater by Mg-Loaded Biochars: Adsorption Characteristics and Removal Mechanisms

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