Remediation of Ni2+ in a nickel-contaminated water sample using magnetic nanoprobes prepared via green process by Psidium guajava leaves extract

3rd International Symposium on Green Technology for Value Chains 2018

生态环境科学;自然科学（总论）

Capangpangan, R.Y.^1^2^3 ; Corpuz, M.J.B.^4 ; Alguno, A.C.^5

Chemistry Division, Caraga State University, Philippines^1

Mineral Resources Management Research and Training Center (MinRes), Philippines^2

Material Science and Polymer Chemistry Laboratory, Caraga State University, Philippines^3

Environmental Science Division, Caraga State University, Philippines^4

Department of Physics, MSU-Iligan Institute of Technology (MSU-IIT), Philippines^5

关键词: Adsorption capacities;    Batch adsorption experiments;    Chemical coprecipitation method;    Cost-effective analysis;    Environmental remediation;    Fourier transform infra red (FTIR) spectroscopy;    Functional group analysis;    Magnetic nanoparti cles (MNPs);   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/277/1/012033/pdf
DOI  :  10.1088/1755-1315/277/1/012033

来源: IOP

【 摘 要 】

Rapid detection of toxic metal ions is of paramount importance in environmental studies for efficient environmental remediation. The use of effective nanomaterials that facilitate fast detection and cost-effective analysis is one of the active areas of research nowadays. Plant-based magnetic nanoparticles (MNPs) were prepared via a reverse chemical co-precipitation method using guava leaves extract as a reducing agent. The prepared MNPs were utilized as an adsorbent for the remediation of Ni2+ ions in aqueous solution. Batch adsorption experiment was conducted to evaluate the amount of Ni2+ ions being adsorbed in the surface of the MNPs. Results revealed that 98% of the Ni2+ ions were adsorbed in the surface of the MNPs when 5.0 mg of the MNP adsorbent was utilized. Likewise, it was observed that the maximum adsorption was achieved even at 10 minutes incubation time using 1.597 ppm initial Ni2+ concentration and the use of 5.0 mg of MNP. The adsorption behavior and mechanism of MNPs as the adsorbent is probably dominated by electron-electron interaction, and the data can be correlated with the functional group analysis using Fourier-Transform Infrared Spectroscopy (FT-IR). It was also observed that higher adsorption capacity (∼8.5 mg/g) was attained when 5.0 mg of MNP was used. Importantly, the equilibrium data perfectly fit in the Langmuir isotherm with a slight deviation in the Freundlich isotherm.