Efficient absorptive removal of Cd(Ⅱ) in aqueous solution by biochar derived from sewage sludge and calcium sulfate

Liu, Liheng; Yue, Tiantian; Liu, Rui; Lin, Hua; Wang, Dunqiu; Li, Baoxiang

doi:10.1016/j.biortech.2021.125333

Cited by 65 publications

(7 citation statements)

References 51 publications

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“…where C 0 and C t are the initial and residual concentrations (mg/L) of Cd(II), respectively. 39 The experiments were performed in triplicate.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…In addition, the effect of OWIR@TWL@SP amounts (1, 2, 3, 4, and 5 g), reaction temperatures (10, 20, 30, 40, and 50 °C), and pH (4, 5, 6, 7, 8, 9, and 10) at 24 h on the Cd(II) removal efficiency (RE) were also investigated. The RE of Cd(II) was calculated using eq : where C 0 and C t are the initial and residual concentrations (mg/L) of Cd(II), respectively . The experiments were performed in triplicate.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of Iron-Based Carbon Microspheres with Tobacco Waste Liquid and Waste Iron Residue for Cd(II) Removal from Water and Soil

Wang

Zhang

et al. 2022

Langmuir

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Herein, a novel magnetic iron-based carbon microsphere was prepared by cohydrothermal treatment of tobacco waste liquid (TWL) and waste iron residue (WIR) to form WIR@TWL. After that, WIR@TWL was coated with sodium polyacrylate (S.P.) to fabricate WIR@TWL@SP, whose removal efficiency for bivalent cadmium (Cd(II)) was studied in water and soil. As a result, WIR@ TWL@SP possessed a high Cd(II) removal efficiency, which could reach 98.5% within 2 h. The adsorption process was consistent with the pseudo-second-order kinetic model because of the higher value of adjusted R 2 (0.99). The thermodynamic data showed that the adsorption process was spontaneous (ΔG°< 0) and exothermic (ΔH°= 32.42 KJ•mol −1 > 0). Cd(II) removal mechanisms also include cation exchange, electrostatic attraction, hydrogen-bond interaction, and cation−π interaction. Notably, pot experiments demonstrated that WIR@TWL@SP could effectively reduce Cd absorption by plants in water and soil. Thus, this study offers an effective method for remediating Cd(II)-contaminated water and soil and may have a practical application value.

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“…where C 0 and C t are the initial and residual concentrations (mg/L) of Cd(II), respectively. 39 The experiments were performed in triplicate.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Synthesis of Iron-Based Carbon Microspheres with Tobacco Waste Liquid and Waste Iron Residue for Cd(II) Removal from Water and Soil

Wang

Zhang

et al. 2022

Langmuir

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show abstract

“…For example, Eqs. (4) [41][42][43][44][45][46][47] and (5) [7,35,[48][49][50][51][52][53] have been used to correlate water contaminant isotherm data. These two equations are, of course, equivalent to each other.…”

Section: ( ) ( ) ( )mentioning

confidence: 99%

The Halsey isotherm for water contaminant adsorption is fake

Chu

Bashiri

Hashim

et al. 2023

Separation and Purification Technology

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“…The most commonly used heavy metal removal methods contained adsorption, photocatalysis, chemical precipitation, ion exchange, electrochemical approaches, membrane filtering, and forward osmosis. , Cadmium (Cd) poisoning can lead to lung damage, cancer, hypertension, liver disease, and aberrant physiological development. Owing to its high persistence, solubility, mobility, and bioaccumulation, Cd is listed as China’s priority pollutant and as one of the most contaminating heavy metals; , therefore, removal of Cd from the aquatic environment is highly important. Ion exchange, chemical precipitation, coagulation, adsorption, and membrane separation are common methods used to remove Cd(II) from aquatic environment.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of a Novel Decomposed Corn Straw-Sludge Biochar and Its Mechanism of Removing Cadmium from Water

Chen,

Gao,

Miao

et al. 2023

ACS Omega

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The utilization of high-efficiency adsorption materials to reduce cadmium pollution in aquatic environments is the focus of current environmental remediation research. Straw waste and sludge, which are available in huge amounts, can be best utilized in the preparation of environmental remediation materials. In this study, six types of biochar (SBC, CBC, DBC, SD1BC, SRDBC, and SCDBC) were prepared from straw and sludge by co-pyrolysis, and their cadmium adsorption mechanisms were explored. Cd(II) adsorption isotherms and kinetics on the biochar were determined and fitted to different models. Kinetic modeling was used to characterize the Cd(II) adsorption of biochar, and findings revealed the process of sorption followed pseudo-second-order kinetics (R 2 > 0.96). The Langmuir model accurately represented the isotherms of adsorption, indicating that the process was monolayer and controlled by chemical adsorption. SCDBC had the highest capacity for Cd(II) adsorption (72.2 mg g–1), 1.5 times greater than that of sludge biochar, and 3 times greater than that of corn straw biochar. As the pH level rose within the range of pH 5.0 to 7.0 and the ionic strength decreased, the adsorption capacity experienced an increase. SCDBC contained CaCO3 mineral crystals before Cd(II) adsorption, and CdCO3 was found in SCDBC after adsorbing Cd(II) via X-ray diffraction analysis; the peak of Cd could be observed by Fourier transform infrared spectroscopy after the adsorption of Cd(II). The possible adsorption of Cd(II) by SCDBC occurred primarily via surface complexation with active sorption sites, precipitation with inorganic anions, and coordination with π electrons. Collectively, the study suggested that the six types of biochar, particularly SCDBC, could be used as highly efficient adsorbents for Cd(II) removal from aquatic environments.

show abstract

Efficient absorptive removal of Cd(Ⅱ) in aqueous solution by biochar derived from sewage sludge and calcium sulfate

Cited by 65 publications

References 51 publications

Synthesis of Iron-Based Carbon Microspheres with Tobacco Waste Liquid and Waste Iron Residue for Cd(II) Removal from Water and Soil

Synthesis of Iron-Based Carbon Microspheres with Tobacco Waste Liquid and Waste Iron Residue for Cd(II) Removal from Water and Soil

The Halsey isotherm for water contaminant adsorption is fake

Characteristics of a Novel Decomposed Corn Straw-Sludge Biochar and Its Mechanism of Removing Cadmium from Water

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