Remediation and its biological responses of Cd contaminated sediments using biochar and minerals with nanoscale zero-valent iron loading

Liu, Qunqun; Sheng, Yanqing; Wang, Wenjing; Li, Changyu; Zhao, Guoqiang

doi:10.1016/j.scitotenv.2020.136650

Cited by 68 publications

(35 citation statements)

References 61 publications

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“…In addition, Cd 2+ could coprecipitate with Fe 2+ to form metal hydroxides over the external surfaces of adsorbents. Within pH ≥ 5.50, the chemical equation of the reaction is as formula (3.2) [ 51 , 52 ]

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Section: Resultsmentioning

confidence: 99%

Shell biomass material supported nano-zero valent iron to remove Pb ²⁺ and Cd ²⁺ in water

Wang

Luo

et al. 2020

R. Soc. open sci.

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Nanoscale zero-valent iron (NZVI) has a high adsorption capacity for heavy metals, but easily forms aggregates. Herein, preprocessed undulating venus shell (UVS) is used as support material to prevent NZVI from reuniting. The SEM and TEM results show that UVS had a porous layered structure and NZVI particles were evenly distributed on the UVS surface. A large number of adsorption sites on the surface of UVS-NZVI are confirmed by IR and XRD. UVS-NZVI is used for adsorption of Pb 2+ and Cd 2+ at pH = 6.00 in aqueous solution, and the experimental adsorption capacities are 29.91 and 38.99 mg g −1 at optimal pH, respectively. Thermodynamic studies indicate that the adsorption of ions by UVS-NZVI is more in line with the Langmuir model when Pb 2+ or Cd 2+ existed alone. For the mixed solution of Pb 2+ and Cd 2+ , only the adsorption of Pb 2+ by UVS-NZVI conforms to the Langmuir model. In addition, the maximum adsorption capacities of UVS-NZVI for Pb 2+ and Cd 2+ are 93.01 and 46.07 mg g −1 , respectively. Kinetic studies demonstrate that the determination coefficients ( R 2 ) of the pseudo first-order kinetic model for UVS-NZVI adsorption of Cd 2+ and Pb 2+ are higher than those of the pseudo second-order kinetic model and Elovich kinetic model. Highly efficient performance for metal removal makes UVS-NZVI show potential application to heavy metal ion adsorption.

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12

…”

Section: Resultsmentioning

confidence: 99%

Shell biomass material supported nano-zero valent iron to remove Pb ²⁺ and Cd ²⁺ in water

Wang

Luo

et al. 2020

R. Soc. open sci.

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“…(Eccles, 1999). S. obliques immobilized in alginate beads may be used for cadmium bioremediation processes at low concentrations of the metals, since the presence of viable micro-algae biomass increases the alginate's removal capability (Liu et al, 2020). Immobilizedcellsmoreeffective than free cells formetal removal by biomass due to increase inthecellwallpermeability (Dwivedi,1989).…”

Section: Discussionmentioning

confidence: 99%

Use of the microalga Scenedesmus obliquus (Turpin) Kutzing to remove some heavy metals from the industrial wastewaters

Mosleh¹

2021

Egypt. J. of Aquatic Biolo. and Fish.

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“…When the dosage of PAL-nZVI increased to 8%, the TCLP leachability concentration of Cd and Pb tended to remain unchanged and the equilibrium was almost at 30 days. Obvious, the immobilization of Cd and Pb in contaminated soil was slow and complicated, which was unlike the fast adsorption process of heavy metals by nZVI or modified nZVI in aqueous solutions [5].…”

Section: Tclp Methodsmentioning

confidence: 99%

“…Heavy metal accumulation in the soil is a complex and dynamic process which affected by many factors, such as mining, smelting, traffic emissions and other anthropogenic activities [4]. Cadmium (Cd) and lead (Pb) are regarded as the primary poisonous elements which are widespread in soil due to their higher toxicity and bioaccumulation than other heavy metals [5][6][7]. According to the first national report by the Chinese government, 19.4% of Chinese agricultural soils had been contaminated by heavy metals, and the over-standard rate of Cd and Pb attained 7% and 1.5%, respectively.…”

Section: Introductionmentioning

confidence: 99%

Palygorskite Loaded with Nanoscale Zero-Valent Iron as an Effective Stabilizer for Remediation of Soil Contaminated by Cd and Pb

Mi¹,

Ren²,

Tong³

et al. 2021

Pol. J. Environ. Stud.

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Nowadays, the remediation of agricultural soils polluted by Cd and Pb is urgently required. In this study, we used the palygorskite (PAL) as a carrier for nanoscale zero-valent iron (nZVI) to synthesize a new type of stabilizer (PAL-nZVI). After 45 days of incubation, the soil pH increased by 1.80 pH units.The batch experiments exhibited that the bioavailability and leaching toxicity decreased significantly (P < 0.05) with the addition of PAL-nZVI. The data concluded that the 30 days was a critical period for Cd and Pb stabilization and the optimum dosage of PAL-nZVI was 6%. Moreover, the application of PAL-nZVI could transform the speciation of Cd and Pb from labile fraction to stable fraction (the maximum residual percentage of Cd and Pb increased by 27.34% and 36.57%, respectively) after 30 days of incubation. The pot experiments indicated that the application of PAL-nZVI could enhance the growth of corn (Zea mays L.), reduce the accumulation of heavy metals from the soil and decrease the phytotoxicity of Cd and Pb in the soil. These results suggested that the PAL-nZVI, which is high-efficiency and low-cost, can be a feasible stabilizer for the soils contaminated by Cd and Pb.

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Remediation and its biological responses of Cd contaminated sediments using biochar and minerals with nanoscale zero-valent iron loading

Cited by 68 publications

References 61 publications

Shell biomass material supported nano-zero valent iron to remove Pb ²⁺ and Cd ²⁺ in water

Shell biomass material supported nano-zero valent iron to remove Pb ²⁺ and Cd ²⁺ in water

Use of the microalga Scenedesmus obliquus (Turpin) Kutzing to remove some heavy metals from the industrial wastewaters

Palygorskite Loaded with Nanoscale Zero-Valent Iron as an Effective Stabilizer for Remediation of Soil Contaminated by Cd and Pb

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Remediation and its biological responses of Cd contaminated sediments using biochar and minerals with nanoscale zero-valent iron loading

Cited by 68 publications

References 61 publications

Shell biomass material supported nano-zero valent iron to remove Pb 2+ and Cd 2+ in water

Shell biomass material supported nano-zero valent iron to remove Pb 2+ and Cd 2+ in water

Use of the microalga Scenedesmus obliquus (Turpin) Kutzing to remove some heavy metals from the industrial wastewaters

Palygorskite Loaded with Nanoscale Zero-Valent Iron as an Effective Stabilizer for Remediation of Soil Contaminated by Cd and Pb

Contact Info

Product

Resources

About

Shell biomass material supported nano-zero valent iron to remove Pb ²⁺ and Cd ²⁺ in water

Shell biomass material supported nano-zero valent iron to remove Pb ²⁺ and Cd ²⁺ in water