Multicomponent adsorption of heavy metals onto biogenic hydroxyapatite: Surface functional groups and inorganic mineral facilitating stable adsorption of Pb(Ⅱ)

Liu, Xiaofei; Yin, Hua; Liu, Huan; Cai, Yuhao; Qi, Xin; Dang, Zhi

doi:10.1016/j.jhazmat.2022.130167

Cited by 56 publications

(12 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It has been reported that the Ca 2+ in Ca-containing adsorbents can leave its lattice sites in water through dissolution recrystallization and has good removal performance for heavy metals. , Therefore, the evolution of the crystal structure of CaFe-LDH in water with different material-to-solution ratios (1, 5, and 10 g/L) was first investigated (the products are denoted as CaFe-M R , where R stands for the material-to-solution ratio). Figure a displays the XRD diagram of the CaFe-M samples.…”

Section: Resultsmentioning

confidence: 99%

Multiple Anchor Sites of CaFe-LDH Enhanced the Capture Capacity to Cadmium, Arsenite, and Lead Simultaneously in Contaminated Water/Soil: Scalable Synthesis, Mechanism, and Validation

Liu,

Yang,

et al. 2023

ACS EST Eng.

View full text Add to dashboard Cite

Heavy metal pollution is a global challenge to human health and ecosystems, and various strategies have been developed to eliminate these hazardous pollutants. However, due to the contrasting biogeochemical behavior of cadmium (Cd) and arsenic (As), the efficient and simultaneous removal of these substances is still a major challenge. Here, we demonstrated that the synthesized CaFe-layered double hydroxide (CaFe-LDH) can provide various active sites for the simultaneous removal of Cd 2+ , AsO 2 − , and Pb 2+ with removal efficiencies of >95% in 5 min and >99% within 60 min. The combination of energy-dispersive Xray elements and structural characterizations indicated that Cd 2+ was anchored in the lattice of the layer through isomorphous substitution with Ca, AsO 2 − was trapped by amorphous FeOOH, while Pb 2+ was removed via the precipitation route. At the same time, we provide a scalable (100 g/batch in the lab and 500 kg/ batch in the pilot plant) and effective strategy to produce CaFe-LDH using only Ca(OH) 2 and FeCl 3 as building blocks. Moreover, hydroponics and potting experiments have shown that CaFe-LDH can not only significantly suppress the migration of the above-mentioned heavy metals from the soil into plants (the reduction efficiencies for Cd 2+ , AsO 2 − , and Pb 2+ are up to 98.7, 99.4, and 94.9%, respectively) but also have a positive effect on plant growth. Therefore, our work opens the possibility of scalable production of CaFe-LDH and offers a new perspective for the simultaneous removal of Cd 2+ , AsO 2 − , and Pb 2+ from contaminated wastewater and soil.

show abstract

Section: Resultsmentioning

confidence: 99%

Multiple Anchor Sites of CaFe-LDH Enhanced the Capture Capacity to Cadmium, Arsenite, and Lead Simultaneously in Contaminated Water/Soil: Scalable Synthesis, Mechanism, and Validation

Liu,

Yang,

et al. 2023

ACS EST Eng.

View full text Add to dashboard Cite

show abstract

“…To evaluate the adsorption stability, competitive adsorption experiments were carried out in the As(V) solution with the addition of 200 mg/L sulfate. The interaction stability between iron (hydr)oxides and As(V) was simply reflected by the ratio of the equilibrium adsorption capacity toward As(V) in the binary-anion system ( Q b ) to the equilibrium adsorption capacity in the single-anion system ( Q s ) . All of these batch experiments were performed in duplicates.…”

Section: Methodsmentioning

confidence: 99%

“…The interaction stability between iron (hydr)oxides and As(V) was simply reflected by the ratio of the equilibrium adsorption capacity toward As(V) in the binary-anion system (Q b ) to the equilibrium adsorption capacity in the single-anion system (Q s ). 57 All of these batch experiments were performed in duplicates. Afterward, the amount of As(V) uptake was calculated by determining the concentration of As(V) in solutions.…”

Section: Materials and Reagentsmentioning

confidence: 99%

Structure Evolution of Iron (Hydr)oxides under Nanoconfinement and Its Implication for Water Treatment

Wang,

Jiang,

Qian

et al. 2023

Environ. Sci. Technol.

View full text Add to dashboard Cite

In the development of nanoenabled technologies for large-scale water treatment, immobilizing nanosized functional materials into the confined space of suitable substrates is one of the most effective strategies. However, the intrinsic effects of nanoconfinement on the decontamination performance of nanomaterials, particularly in terms of structural modulation, are rarely unveiled. Herein, we investigate the structure evolution and decontamination performance of iron (hydr)oxide nanoparticles, a widely used material for water treatment, when confined in track-etched (TE) membranes with channel sizes varying from 200 to 20 nm. Nanoconfinement drives phase transformation from ferrihydrite to goethite, rather than to hematite occurring in bulk systems, and the increase in the nanoconfinement degree from 200 to 20 nm leads to a significant drop in the fraction of the goethite phase within the aged products (from 41% to 0%). The nanoconfinement configuration is believed to greatly slow down the phase transformation kinetics, thereby preserving the specific adsorption of ferrihydrite toward As(V) even after 20-day aging at 343 K. This study unravels the structure evolution of confined iron hydroxide nanoparticles and provides new insights into the temporospatial effects of nanoconfinement on improving the water decontamination performance.

show abstract

“…With the rapid development of industrialization and urbanization, the phenomenon of combined pollution, which is an environmental pollution caused by the simultaneous existence of two or more different types of pollutants in the environment, is common presented in soil and groundwater environments and has become a critical problem in the eld of environmental remediation (Wu, et al 2015;Gulan et al, 2017;Liu et al 2022 ;Liu et al 2023). Exploring environmental behaviors of the pollutants is essential issue to the remediation.…”

Section: Introductionmentioning

confidence: 99%

“…So, one of these coexistenced pollutants including heavy metals (such as Pb and Cd) and organic matters (such as TNT, aniline and toluene) had been studied extensively to expolore its characteristics of adsorption on media over decades (Hristov and Hristov, 2017; Lin and Xu, 2020; Pintor et al 2021; Wu et al 2022), and it also was found that the characteristics of adsorption had in uence on the objective pollutant transport in soil and groundwater (Pintor et al 2021;Liu et al 2023). As you known, its surface properties of an adsorbent can cause changed via adsorbing one, thus affecting its adsorption for other pollutants (Zhou et al 2003; Lin and Xu, 2020; Forgionny et al 2021;Liu et al 2023). So, it is reasonable to speculate that the interaction between their adsorptions should inevitably affect their transports in soil and groundwater.…”

Section: Introductionmentioning

confidence: 99%

Batch and column tests study on coexistence of TNT and aniline enhancing their Transports in Chinese loess

Zhou

et al. 2023

Preprint

View full text Add to dashboard Cite

Batch adsorption and column tests were conducted to explore characteristics of transports of TNT and aniline and their interactions in saturated Chinese loess sampled from Xi’an, China. Batch tests show that the performances of TNT and aniline adsorptions on Chinese loess are not same when they exist alone. When they coexist, their adsorptions inhibit each other and their inhibitions potentials were different. TNT inhibition on aniline adsorption is in linear and increases with TNT concentration increasing, while aniline inhibition on TNT adsorption also depends on its concentration but in two stages, where the inhibition is few when aniline concentration is lower than 5 mg/L, and then also gets linear increasing with aniline concentration increasing over 5 mg/L. Even though, the inhibition of aniline on TNT adsorption is generally greater than that of TNT on aniline adsorption. Column tests show that, compared with the transport behavior when they exist alone, theier coexistence can promote each other to transport in the saturated loess, importantly, aniline promotes more obviously TNT transport than TNT promotes aniline transport. Kinetics, isotherms and thermodynamics studies indicat that, TNT adsorption is primarily through the surface adsorption while aniline adsorption is mainly via electrostatic adsorption and inner pore diffusion adsorption as well as surface adsorption. There is a certain competitive relationship in their adsorptions on Chinese loess because they have same adsorption sites, meanwhile, they have different adsorption sites, especially, electrostatic force is greater than surface force, when they coexist. So, these inhibitions on adsorption are conducive to the existences of TNT and aniline in the water solution rather than being fixed on Chinese loess, thus enhancing their transports in the saturated loess and aniline has a great effect on TNT migration, while TNT has a small effect on aniline transport, indicating their coexistence can increase the risk of deep soil and even groundwater pollution.

show abstract

Multicomponent adsorption of heavy metals onto biogenic hydroxyapatite: Surface functional groups and inorganic mineral facilitating stable adsorption of Pb(Ⅱ)

Cited by 56 publications

References 52 publications

Multiple Anchor Sites of CaFe-LDH Enhanced the Capture Capacity to Cadmium, Arsenite, and Lead Simultaneously in Contaminated Water/Soil: Scalable Synthesis, Mechanism, and Validation

Multiple Anchor Sites of CaFe-LDH Enhanced the Capture Capacity to Cadmium, Arsenite, and Lead Simultaneously in Contaminated Water/Soil: Scalable Synthesis, Mechanism, and Validation

Structure Evolution of Iron (Hydr)oxides under Nanoconfinement and Its Implication for Water Treatment

Batch and column tests study on coexistence of TNT and aniline enhancing their Transports in Chinese loess

Contact Info

Product

Resources

About