Drought-resistant and water-retaining tobermorite/starch composite hydrogel for the remediation of cadmium-contaminated soil

He, Caiqing; Mou, Haiyan; Hou, Wenjing; Chen, Wenqing; Ao, Tianqi

doi:10.1016/j.ijbiomac.2023.127534

Cited by 4 publications

(1 citation statement)

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“…The hydrogel showed high adsorption capacity for Cu (II) and Pb (II) [30]. He et al incorporated coal ash-modified TOB into a starch/acrylic acid hydrogel, displaying notable adsorption capacity for cadmium [31]. In a another study, a composite hydrogel (AM/CMC/B) using peanut shells showed a maximum adsorption capacity for Cd 2+ and demonstrated potential in remediating cadmium-contaminated soil, reducing soil inhibitory effects on tobacco seedlings [32].…”

Section: Introductionmentioning

confidence: 99%

Functional Hydrogels Promote Vegetable Growth in Cadmium-Contaminated Soil

Huang,

Gotoh,

Nakai

et al. 2024

Gels

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Over the years, the concentration of cadmium in soil has increased due to industrialization. Cadmium in the soil enters the human body through plant accumulation, seriously endangering human health. In the current study, two types of hydrogels were successfully synthesized using a free radical polymerization method: an ion-type hydrogel referred to as DMAPAA (N-(3-(Dimethyl amino) propyl) acrylamide)/DMAPAAQ (N,N-Dimethyl amino propyl acrylamide, methyl chloride quaternary) and a non-ion-type hydrogel known as DMAA (N,N-Dimethylacrylamide). In the experiment carried out in this study, the ion-type hydrogel DMAPAA/DMAPAAQ was introduced to cadmium-contaminated soil for vegetable cultivation. The study found that at cadmium levels of 0 and 2 mg/kg in soil, when exposed to a pH 2 solution, cadmium wasn’t detected in the filtrate using ICP. As the amount of cadmium increased to 500 mg/kg, hydrogel addition gradually reduced the filtrate cadmium concentration. Notably, the use of the 4% hydrogel resulted in 0 mg/L of cadmium. For the 0% hydrogel, vegetable cadmium absorption was determined to be 0.07 mg/g, contrasting with 0.03 mg/g for the 4% hydrogel. The DMAPAA/DMAPAAQ hydrogel significantly boosts vegetable growth by efficiently absorbing nitrate ions through ion exchange, releasing them for plant uptake. In contrast, the DMAA hydrogel, used as a control, does not enhance plant growth despite its water absorption properties. In summary, the composite hydrogel shows great potential for enhancing vegetable yield and immobilizing heavy metals in soil.

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Section: Introductionmentioning

confidence: 99%

Functional Hydrogels Promote Vegetable Growth in Cadmium-Contaminated Soil

Huang,

Gotoh,

Nakai

et al. 2024

Gels

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Multifaceted Hydrogel Scaffolds: Bridging the Gap between Biomedical Needs and Environmental Sustainability

Mamidi,

De Silva,

Vacas

et al. 2024

Adv Healthcare Materials

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Hydrogels are dynamically evolving 3D networks composed of hydrophilic polymer scaffolds with significant applications in the healthcare and environmental sectors. Notably, protein‐based hydrogels mimic the extracellular matrix, promoting cell adhesion. Further enhancing cell proliferation within these scaffolds are matrix‐metalloproteinase‐triggered amino acid motifs. Integration of cell‐friendly modules like peptides and proteins expands hydrogel functionality. These exceptional properties position hydrogels for diverse applications, including biomedicine, biosensors, environmental remediation, and the food industry. Despite significant progress, there is ongoing research to optimize hydrogels for biomedical and environmental applications further. Engineering novel hydrogels with favorable characteristics are crucial for regulating tissue architecture and facilitating ecological remediation. This review explores the synthesis, physicochemical properties, and biological implications of various hydrogel types and their extensive applications in biomedicine and environmental sectors. It elaborates on their potential applications, bridging the gap between advancements in the healthcare sector and solutions for environmental issues.This article is protected by copyright. All rights reserved

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