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Peer-reviewedCC BY 4.0Polymers

Modified Corn Straw Hydrogel Adsorbent Fabricated via Embedding for Removing Cu2+ and Pb2+ from Wastewater

  • Meiqing Fan1,2
  • Hong Zhang1
  • Wenming Wu3
  • Hongze An1
  • Xin Zhang1
  • Xu Zeng1
  • Xiaodong Yang1
  • Bo Ren1
  • Bo Wang1
  1. 1Jilin Provincial Key Laboratory of Straw-Based Functional Materials, Institute for Interdisciplinary Biomass Functional Materials Studies, Jilin Engineering Normal University, Changchun 130052, China
  2. 2School of Biological and Food Engineering, Jilin Engineering Normal University, Changchun 130052, China
  3. 3Zhongxin Link Environmental Technology (Anhui) Co., Ltd., Lu’an 237000, China
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Abstract

In this study, a modified corn straw hydrogel adsorbent (CSHA) was fabricated via the embedding method. The adsorbent facilitates phase separation after adsorbing lead ions (Pb2+) and copper ions (Cu2+) from wastewater. A set of experiments verified that metal ions formed coordination bonds with the carboxyl functional groups on the adsorbent surface. The influences of pH, contact time, initial metal ion concentration and temperature on adsorption performance were systematically explored. The results revealed that the adsorption capacities for Cu2+ and Pb2+ were 396.43 mg/g and 151.96 mg/g, respectively, under the given experimental conditions. The adsorption process followed the pseudo-second-order kinetic model and the Langmuir isotherm model. The thermodynamic calculations indicated that the adsorption was an endothermic and spontaneous process accompanied by increased system disorder. After five adsorption–desorption cycles, the removal efficiency of CSHA remained above 65%. This work offers a low-cost, eco-friendly and high-performance adsorbent for heavy-metal-containing wastewater treatment.

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Cite

BibTeXRIS
BibTeX
@article{fan2026modified,
  title = {{Modified Corn Straw Hydrogel Adsorbent Fabricated via Embedding for Removing Cu2+ and Pb2+ from Wastewater}},
  author = {Meiqing Fan and Hong Zhang and Wenming Wu and Hongze An and Xin Zhang and Xu Zeng and Xiaodong Yang and Bo Ren and Bo Wang},
  journal = {Polymers},
  year = {2026},
  month = oct,
  doi = {10.3390/polym18212653},
  url = {https://www.mdpi.com/2073-4360/18/21/2653},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Modified Corn Straw Hydrogel Adsorbent Fabricated via Embedding for Removing Cu2+ and Pb2+ from Wastewater
AU  - Meiqing Fan
AU  - Hong Zhang
AU  - Wenming Wu
AU  - Hongze An
AU  - Xin Zhang
AU  - Xu Zeng
AU  - Xiaodong Yang
AU  - Bo Ren
AU  - Bo Wang
PY  - 2026
DA  - 2026/10/26
JO  - Polymers
DO  - 10.3390/polym18212653
UR  - https://www.mdpi.com/2073-4360/18/21/2653
AB  - In this study, a modified corn straw hydrogel adsorbent (CSHA) was fabricated via the embedding method. The adsorbent facilitates phase separation after adsorbing lead ions (Pb2+) and copper ions (Cu2+) from wastewater. A set of experiments verified that metal ions formed coordination bonds with the carboxyl functional groups on the adsorbent surface. The influences of pH, contact time, initial metal ion concentration and temperature on adsorption performance were systematically explored. The results revealed that the adsorption capacities for Cu2+ and Pb2+ were 396.43 mg/g and 151.96 mg/g, respectively, under the given experimental conditions. The adsorption process followed the pseudo-second-order kinetic model and the Langmuir isotherm model. The thermodynamic calculations indicated that the adsorption was an endothermic and spontaneous process accompanied by increased system disorder. After five adsorption–desorption cycles, the removal efficiency of CSHA remained above 65%. This work offers a low-cost, eco-friendly and high-performance adsorbent for heavy-metal-containing wastewater treatment.
SN  - 2073-4360
ER  -