Removal of Cadmium in Aqueous Solution by Sulfidated Nanoscale Zero-Valent Iron

Yang, Weiyun; Qin, Ruolin; Qin, Rui; Zhang, Linli; Qiu, Muqing

doi:10.46488/nept.2020.v19i02.031

Cited by 3 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, using nZVI alone may not be an effective method for contaminant removal due to high oxidation capacity of nZVI, leading to increased coagulation phenomenon and formation of induced sediments in the process which consequently reduces contact surface area and reactivity [48]. Different strategies have been proposed to overcome these problems by stabilization and immobilization of nZVI in porous media such as bentonite [49], kaolinite [50], sepiolite [44], biochar [51], carbon nanotubes [52], and activated carbon [53]. In addition to its considerable adsorption capacity and high specific surface area, activated carbon is easily available, inexpensive and eco-friendly [54,55].…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Nanoscale Zero-Valent Iron/Activated Carbon Composites and their Application for Copper and Chromium Removal from Aqueous Solutions

Afroosheh

Bakhtiari

Shahrashoub

et al. 2021

JNanoR

View full text Add to dashboard Cite

In this study, nanoscale zero-valent iron (nZVI) particles and their composites with powdered activated carbon (nZVI-PAC) and granular activated carbon (nZVI-GAC) were successfully synthesized via a low-cost green approach with the use of green tea extract. The adsorbents were then used to remove Cr and Cu from aqueous solutions, and their adsorption results were fitted with the Freundlich and Langmuir models. The synthesized adsorbents were characterized using XRD, FTIR, and FESEM techniques. The typical peak of Fe0 was detected in the XRD patterns of prepared samples, but the presence of organic compounds in green tea extract weakened related peak. The FESEM characterization demonstrated that the nZVI spherical particles had a chain-like structure and ranging in size from 10 to 50nm. The presence of polyphenols peak in the FTIR spectra revealed that the green tea extract was responsible for the reduction of the Fe2+ to Fe0. The maximum adsorbed amount of Cr and Cu was found to be 5.68 and 6.48 mg/g, which was achieved by nZVI-PAC and nZVI, respectively. The nZVI-PAC and nZVI also showed a higher removal efficiency for Cu and Cr by 62% and 94% for an initial concentration of 100 mg/L, respectively. The results showed that nZVI, nZVI-PAC, and nZVI-GAC could be promising and eco-friendly adsorbents for Cr and Cu removal from aqueous solutions.

show abstract