Mechanisms for cadmium adsorption by magnetic biochar composites in an aqueous solution

Khan, Zulqarnain Haider; Gao, Minling; Qiu, Weiwen; Islam, Md. Shafiqul; Song, Zhengguo

doi:10.1016/j.chemosphere.2019.125701

Cited by 196 publications

(55 citation statements)

References 49 publications

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“…The change in Gibbs free energy increases with increasing of temperature, indicating that the driving force of the reaction is amplied. 48 3.2.6. Inuence of competing ions.…”

Section: Effect Of Phmentioning

confidence: 99%

Removal of copper ions by functionalized biochar based on a multicomponent Ugi reaction

2021

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“…The change in Gibbs free energy increases with increasing of temperature, indicating that the driving force of the reaction is amplied. 48 3.2.6. Inuence of competing ions.…”

Section: Effect Of Phmentioning

confidence: 99%

Removal of copper ions by functionalized biochar based on a multicomponent Ugi reaction

2021

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“…The BET surface area (S BET ) and total pore volume (TPV) of CS-NMAC were 1092.17 m 2 /g and 0.6715 cm 3 /g, respectively. These S BET and TPV values of CS-NMAC were higher than those of other magnetic adsorbents reported in the literature: -magnetic iron oxide nanoparticles derived from Cyanometra ramiflora fruit extract waste (107.97 m 2 /g, 0.13 cm 3 /g) (Bishnoi et al, 2017); magnetic biochar derived from Astragalus membranaceus residues (203.7 m 2 /g, 0.187 cm 3 /g) (Kong et al, 2017); activated carbon derived magnetic CS (951.84 m 2 /g, 0.6715 cm 3 /g) (Hao et al, 2018); and magnetic corn waste straw (313.9 m 2 /g, 0.22 cm 3 /g) (Khan et al, 2020). Thus, CS-NMAC is expected to have a better performance in adsorption than the magnetic iron oxide nanoparticles derived from other carbonaceous biomass owing to its high porosity.…”

Section: Characterization Of Cs-nmacmentioning

confidence: 99%

Rhodamine 6g Removal from Aqueous Solution with Coconut Shell-Derived Nanomagnetic Adsorbent Composite (Cs-Nmac): Isotherm and Kinetic Studies

Abdullah¹,

Wen²,

Awang³

et al. 2021

JST

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Untreated effluents from the textile industry containing colorant dyes are harmful to the environment, aquatic organisms, and human health. Among these effluents, Rhodamine 6G is known as a corrosive and irritant dye. A coconut shell-derived nanomagnetic adsorbent composite (CS-NMAC) was developed to remove Rhodamine 6G from aqueous solution. Physical and adsorption properties of CS-NMAC were characterized via Brunauer–Emmett–Teller (BET) surface area analysis (SBET: 1092.17 m2/g; total pore volume: 0.6715 cm3/g), X-ray diffraction (Fe3O4 [θ=35.522], Fe2O3 [θ=35.720] and FeO [θ=41.724]) and Fourier transform infrared spectroscopy (Fe–O, C–H, asymmetric C=C=C, CN and O–H). CS-NMAC was found to be electropositive within a broad pH range of 3–10) owing to the presence of nanoscale iron oxides on the surface of the coconut shell-derived adsorbent that enhanced the chemical and electrochemical outputs. Isotherm study revealed that the adsorption process of Rhodamine 6G followed a multilayer type of adsorption onto a heterogeneous surface. Freundlich model fitted better (R2 = 0.981) than the other models (Langmuir, Temkin and BET). The maximum adsorption capacity was 32.02 mg/g. Rhodamine 6G removal by CS-NMAC obeyed the pseudo-second-order reaction (R2 = 0.9995) as opposed to other kinetic models. CS-NMAC has the potential to become an effective treatment for dye pollution.

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“…Nordberg et al (2018) stated Cd absorbed from the soil by eld crops, such as wheat, rice and potatoes, has negative effects on human bones. In Japan, water and soil contaminated by Cd is the major cause of the Itai-itai disease (Khan et al, 2020). Cadmium causes bone disease, kidney damage and cancer.…”

Section: Introductionmentioning

confidence: 99%

“…However, these techniques have many disadvantages. For example, they are costly, consume high energy, have potential of secondary pollution and are only valid within a range of Cd concentration (Lamet al, 2019; Khan et al, 2020). Moreover, most of the conventional techniques do not provide 100% heavy metal removal with restrictions on pH variation (Ahluwalia and Goyal, 2007; , are e cient at only smaller concentrations Antunes et al, 2003), produce toxic sludge and waste products, and need high exploitation and recycling costs (Oboh et al, 2009;.…”

Section: Introductionmentioning

confidence: 99%

Phytoremediation of Contaminated Water by Cadmium (Cd) Using Two Cyanobacteria Species (Anabaena Variabilis and Nostoc Muscorum)

El-Hameed

Abuarab

Al‐Ansari

et al. 2021

Preprint

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Background: Water pollution with heavy metals is a severe dilemma that worries the whole world related to its risk to nature ecosystem and human being health. The main objective is to evaluate the removal efficiency of Cd with various concentrations from contaminated aqueous solution by two Cyanobacteria species (Nostoc muscorum and Anabaena variabilis). For this purpose, a designed laboratory pilot scale was applied using two cyanobacteria species (Nostoc muscorum and Anabaena variabilis), four different initial concentrations (0, 0.5, 1.0 and 2.0 mg L−1) for 21 days. Results: N. muscorum was more efficient than A. variabilis for removing Cd (II), because the optimum value of residual Cd achieved by N. muscorum after 21 days at (0.5 mg L-1) was (0.033 mg L-1), where the removal efficiency was 93.4%, while the residual Cd (II) by A. variabilis under the same conditions was (0.054 mg L-1), and the achieved removal efficiency was 89.13%. Algal growth parameters and Photosynthetic pigments were estimated for both Cyanobacteria species through the incubation period. Conclusions: High Cd concentration had a more toxic impact on algal growth. The outcomes of this study will help to produce treated water that could be reused in agrarian activities.

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Mechanisms for cadmium adsorption by magnetic biochar composites in an aqueous solution

Cited by 196 publications

References 49 publications

Removal of copper ions by functionalized biochar based on a multicomponent Ugi reaction

Removal of copper ions by functionalized biochar based on a multicomponent Ugi reaction

Rhodamine 6g Removal from Aqueous Solution with Coconut Shell-Derived Nanomagnetic Adsorbent Composite (Cs-Nmac): Isotherm and Kinetic Studies

Phytoremediation of Contaminated Water by Cadmium (Cd) Using Two Cyanobacteria Species (Anabaena Variabilis and Nostoc Muscorum)

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