A Carbonized Zeolite/Chitosan Composite as an Adsorbent for Copper (II) and Chromium (VI) Removal from Water

Hidayat, Endar; Yoshino, Tomoyuki; Yonemura, Seiichiro; Mitoma, Yoshiharu; Harada, Hiroyuki

doi:10.3390/ma16062532

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A Carbonized Zeolite/Chitosan Composite as an Adsorbent for Copper (II) and Chromium (VI) Removal from Water

by

Endar Hidayat

^1,2

,

Tomoyuki Yoshino

^1,2,

Seiichiro Yonemura

^1,2,

Yoshiharu Mitoma

^1,2 and

Hiroyuki Harada

^1,2,*

¹

Graduate School of Comprehensive and Scientific Research, Prefectural University of Hiroshima, Shobara 727-0023, Japan

²

Department of Life and Environmental Science, Prefectural University of Hiroshima, Shobara 727-0023, Japan

^*

Author to whom correspondence should be addressed.

Materials 2023, 16(6), 2532; https://doi.org/10.3390/ma16062532

Submission received: 27 February 2023 / Revised: 20 March 2023 / Accepted: 21 March 2023 / Published: 22 March 2023

(This article belongs to the Special Issue Bio-Based Materials and Their Environmental Applications)

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Abstract

To address Cu(II) and Cr(VI) water pollution, a carbonized zeolite/chitosan (C-ZLCH) composite adsorbent was produced via pyrolysis at 500 °C for two hours. C-ZLCH was characterized using scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS), and zeta potential measurements. The batch experiments were performed by varying the initial pH, concentration, and contact time. The optimal pH values for Cu(II) and Cr(VI) were 8.1 and 9.6, respectively. The highest adsorption capacities for Cu(II) and Cr(VI) were 111.35 mg/g at 60 min and 104.75 mg/g at 90 min, respectively. The effects of chemicals such as sodium (Na⁺), glucose, ammonium (NH₄⁺), and acid red 88 (AR88) were also studied. Statistical analysis showed that sodium had no significant effect on Cu(II) removal, in contrast to Cr(VI) removal. However, there was a significant effect of the presence of glucose, ammonium, and AR88 on both Cu(II) and Cr(VI) removal. The adsorption isotherm and kinetic models were fitted using Langmuir and pseudo-second-order models for Cu(II) and Cr(VI), respectively.

Keywords: adsorption; chitosan; Cu(II) removal; Cr(VI) removal; isotherm studies; kinetic studies; carbonized zeolite/chitosan; zeolite

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MDPI and ACS Style

Hidayat, E.; Yoshino, T.; Yonemura, S.; Mitoma, Y.; Harada, H. A Carbonized Zeolite/Chitosan Composite as an Adsorbent for Copper (II) and Chromium (VI) Removal from Water. Materials 2023, 16, 2532. https://doi.org/10.3390/ma16062532

AMA Style

Hidayat E, Yoshino T, Yonemura S, Mitoma Y, Harada H. A Carbonized Zeolite/Chitosan Composite as an Adsorbent for Copper (II) and Chromium (VI) Removal from Water. Materials. 2023; 16(6):2532. https://doi.org/10.3390/ma16062532

Chicago/Turabian Style

Hidayat, Endar, Tomoyuki Yoshino, Seiichiro Yonemura, Yoshiharu Mitoma, and Hiroyuki Harada. 2023. "A Carbonized Zeolite/Chitosan Composite as an Adsorbent for Copper (II) and Chromium (VI) Removal from Water" Materials 16, no. 6: 2532. https://doi.org/10.3390/ma16062532

APA Style

Hidayat, E., Yoshino, T., Yonemura, S., Mitoma, Y., & Harada, H. (2023). A Carbonized Zeolite/Chitosan Composite as an Adsorbent for Copper (II) and Chromium (VI) Removal from Water. Materials, 16(6), 2532. https://doi.org/10.3390/ma16062532

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A Carbonized Zeolite/Chitosan Composite as an Adsorbent for Copper (II) and Chromium (VI) Removal from Water

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