Banana Peel Derived Chitosan-Grafted Biocomposite for Recovery of NH4 + and PO4 3-

被引:6
|
作者
Mondal, Himarati [1 ]
Datta, Bhaskar [1 ,2 ]
机构
[1] Indian Inst Technol Gandhinagar, Dept Chem, Gandhinagar 382055, Gujarat, India
[2] Indian Inst Technol Gandhinagar, Dept Biol Engn, Gandhinagar 382055, Gujarat, India
来源
ACS OMEGA | 2023年 / 8卷 / 46期
关键词
DIETARY FIBER COMPONENTS; AQUEOUS-SOLUTION; AMMONIUM ION; ELECTROCHEMICAL CONVERSION; NATURAL ZEOLITE; ORANGE PEEL; REMOVAL; NITROGEN; PHOSPHATE; SUPERADSORPTION;
D O I
10.1021/acsomega.3c05229
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Biomass-derived adsorbents afford accessible and inexpensive harvesting of nitrogen and phosphorus from wastewater sources. Human urine is widely accepted as a rich source of nitrogen and phosphorus. However, direct use of urine in agriculture is untenable because of its unpleasant smell, pathogen contamination, and pharmaceutical residues. In this work, we have grafted chitosan onto dried and crushed banana peel (DCBP) to generate the biocomposite <bold>DCBP/Ch</bold>. A combination of FTIR, TGA, XRD, FESEM, EDX, and NMR analyses were used to characterize <bold>DCBP/Ch</bold> and reveal condensation-aided covalent conjugation between O-H functionalities of DCBP and chitosan. The adsorption performance of <bold>DCBP/Ch</bold> toward NH4+ and PO43- is in sync with its attractive surface porosity, elevated crystallinity, and thermostability. The maximum adsorption capacity of <bold>DCBP/Ch</bold> toward NH4+/PO43- was estimated as 42.16/15.91 mg g(-1) at an operating pH of 7/4, respectively, and ranks highly when compared to previously reported bioadsorbents. <bold>DCBP/Ch</bold> performs admirably when tested on artificial urine. While nitrogen and phosphorus harvesting from human urine using single techniques has been reported previously, this is the first report of a single adsorbent for recovery of NH4+ and PO43-. The environmental compatibility, ease of preparation, and economic viability of <bold>DCBP/Ch</bold> present it as an attractive candidate for deployment in waste channels.
引用
收藏
页码:43674 / 43689
页数:16
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