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. 2020 Sep 7:2020:8887488.
doi: 10.1155/2020/8887488. eCollection 2020.

Removal of Heavy Metal Ion Using Polymer-Functionalized Activated Carbon: Aspects of Environmental Economic and Chemistry Education

Hoang Thu Ha  1 , Nguyen Thi Huong  2 , Le Linh Dan  3 , Nguyen Duy Tung  4 , Vinh Bao Trung  5 , Tran Dinh Minh  6
Affiliations

Removal of Heavy Metal Ion Using Polymer-Functionalized Activated Carbon: Aspects of Environmental Economic and Chemistry Education

Hoang Thu Ha et al. J Anal Methods Chem. .

Abstract

Numerous countries have shown signs of environmental pollution to prioritize economic growth and benefits, leading to seriously contaminated waters. This work indicated the method to synthesize a green material, which could remove contaminants to protect the natural environment. The porosity and functionality effects of amine-functionalized activated carbon (AFAC) enhanced the removal of toxic heavy metals (THMs) in aqueous solution. The raw activated carbon (RAC) was thermally modified with ultrahigh pure nitrogen (UHPN) at 500°C and 1000°C and then amine-functionalized with coupling agent of aminopropyltriethoxysilane (APS). They were denoted as AFAC-5 and AFAC-10, respectively. The data showed an enhanced metal adsorption capacity of the AFACs, because the modification produced more desired porosity and increased amine functional groups. AFAC-10, modified at a higher temperature, showed much higher THM adsorption capacity than AFAC-5, modified at a lower temperature, and RAC. The adsorption capacity decreased in the following order: Ni > Cd > Zn, which was in good agreement with the increasing electronegativity and ionic potential and the decreasing atomic radius. The maximum THM adsorption capacity of AFAC-10 for Ni, Cd, and Zn was 242.5, 226.9, and 204.3 mg/g, respectively.

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Conflict of interest statement

All authors declare that there are no conflicts of interest regarding the publication of this paper.

Figures

Figure 1
Figure 1
Socioeconomic implications of water pollution.
Figure 2
Figure 2
Synthesis pathway of adsorbents.
Figure 3
Figure 3
Effect of pH on the adsorption of THMs using (a) AFAC-5 and (b) AFAC-10.
Figure 4
Figure 4
TEM image of AFAC-10.
Figure 5
Figure 5
FTIR spectra result.
Figure 6
Figure 6
Functionality changes after the modifications.
Figure 7
Figure 7
pHpzc values of RAC, AFAC-5, and AFAC-10.
Figure 8
Figure 8
Dose effect on the sorption capacity (qe) and removal efficiency (%R) of AFAC-5 (a) and AFAC-10 (b).
Figure 9
Figure 9
THM adsorption capacities by RAC, AFAC-5, and AFAC-10 at different C0 of (a) 10 mg/L, (b) 200 mg/L, (c) 400 mg/L, and (d) 600 mg/L.
Figure 10
Figure 10
Kinetic curves fitting the adsorption process by AFAC-10. (a) Pseudo-first-order-plot. (b) Pseudo-second-order-plot.
Figure 11
Figure 11
Chemistry education via STEAM teaching in HES and UEd.
Figure 12
Figure 12
Practical chemistry education in schools.
See this image and copyright information in PMC

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