Issue 9, 2024

The application of water bamboo (Zizania latifolia) husk-derived biochar for copper-contaminated irrigation water treatment and soil amendment

Abstract

In Taiwan, farmlands are polluted with metals mainly caused by irrigation water and sediments in irrigation channels. Copper (Cu) presents a major challenge in Taiwan's agricultural lands. This study investigates the potential of utilizing water bamboo (Zizania latifolia) husk-derived biochar (WBC) for the treatment of copper-contaminated irrigation water and soil amendment. The BET-SSA for WBC that is produced at 600 °C is 192 m2 g−1 and the pore volume is 0.174 cc g−1. The FTIR spectrum of WBC exhibits several functional groups, such as phosphate, carboxylate (–COO), or aromatic (C[double bond, length as m-dash]C) that can contribute to biochar alkalinity. The point of zero charge (pHPZC) of WBC is determined to be 2.7. The optimum adsorption of copper by WBC occurs at pH 5. Copper adsorption by WBC fits well with pseudo-second-order kinetics and the Langmuir isotherm, which demonstrates that chemisorption and monolayer adsorption are the dominant mechanisms for copper removal. The maximum Cu2+ adsorption capacity of WBC is 144.9 mg g−1, which is much higher than those of many existing reports. The addition of 1 to 5% (wt/wt) WBC neutralizes acidic soil pH effectively, making it suitable for water bamboo cultivation.

Graphical abstract: The application of water bamboo (Zizania latifolia) husk-derived biochar for copper-contaminated irrigation water treatment and soil amendment

Article information

Article type
Paper
Submitted
25 Apr 2024
Accepted
02 Jul 2024
First published
08 Jul 2024

Environ. Sci.: Water Res. Technol., 2024,10, 2048-2061

The application of water bamboo (Zizania latifolia) husk-derived biochar for copper-contaminated irrigation water treatment and soil amendment

T. Nguyen, H. Chen, C. Yang, Y. Tsai, M. Kuo, Y. Liao, Y. Chang and K. Chen, Environ. Sci.: Water Res. Technol., 2024, 10, 2048 DOI: 10.1039/D4EW00342J

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