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. 2018 Dec 16;11(12):2558.
doi: 10.3390/ma11122558.

Removal Effect of Atrazine in Co-Solution with Bisphenol A or Humic Acid by Different Activated Carbons

Zhansheng Wu  1   2 , Xinhui Wei  3 , Yongtao Xue  4 , Xiufang He  5 , Xia Yang  6
Affiliations

Removal Effect of Atrazine in Co-Solution with Bisphenol A or Humic Acid by Different Activated Carbons

Zhansheng Wu et al. Materials (Basel). .

Abstract

Activated carbons (ACs) based on apricot shells (AS), wood (W), and walnut shells (WS) were applied to adsorb atrazine in co-solutions. To study the effect of Bisphenol A (BPA) on the adsorption behavior of atrazine, the adsorption performance of ACs for BPA in single solution was studied. The results demonstrated that the adsorption kinetics of BPA fitted the pseudo-second-order model, the adsorption isotherms of BPA followed the Langmuir model. Meanwhile, the adsorption kinetics of atrazine fitted the pseudo-second-order kinetics model and the isotherm was consistent with the Freundlich model both in single solution and co-solution. In addition, competitive adsorption was observed when atrazine coexisted with BPA or humic acid. For the adsorption capacity, the adsorption amount of ASAC, WAC, and WSAC for atrazine obviously decreased by 18.0%, 30.0%, and 30.3% in the presence of BPA, respectively, which was due to the π-π interactions, hydrophobic interactions, and H-bonds, resulting in the competitive adsorption between atrazine and BPA. This study contributes to the further understanding of the adsorption behavior for atrazine in co-solution.

Keywords: NaCl; activated carbon; adsorption; atrazine; bisphenol A; co-solution; humic acids.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
The adsorption kinetic curves of BPA onto ACs in single solution.
Figure 2
Figure 2
Influence of BPA on adsorption kinetics of atrazine onto WAC (a); WSAC (b); ASAC (c).
Figure 3
Figure 3
Adsorption isotherm of BPA onto ACs at 35 °C.
Figure 4
Figure 4
Effect of BPA on adsorption isotherms of atrazine onto WAC (a), WSAC (b), ASAC (c).
Figure 5
Figure 5
Effect of HA on the adsorption of atrazine onto WAC (a), WSAC (b), ASAC (c) (CHA = 20 mg/L).
Figure 6
Figure 6
Effect of NaCl concentrations on the adsorption of atrazine on ACs.
Figure 7
Figure 7
The adsorption mechanisms of atrazine for ACs onto samples in the presence of other substances (Notes: (a). π–π interactions; (b). Hydrophobic effect; (c). H-bond).
See this image and copyright information in PMC

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