Eco-Friendly Engineered Nanomaterials Coupled with Filtering Fine-Mesh Net as a Promising Tool to Remediate...

Area of Science:

• Environmental Science
• Materials Science
• Biotechnology

Background:

• Contaminated dredging sludge poses environmental risks.
• Engineered nanomaterials offer potential for sludge remediation.
• Eco-friendly solutions are needed for effective and safe sludge treatment.

Purpose of the Study:

• To evaluate cross-linked nanocellulose (CNS) for decontaminating real dredging sludge.
• To assess the safety and efficacy of CNS-based nanoremediation.
• To investigate the mitigation of sludge genotoxicity.

Main Methods:

• Application of CNS coupled with a fine-mesh net to freshwater sludge.
• Chemical analysis for heavy metals (Zn, Ni, Cu, Fe) and other elements (Ba, As).
• Toxicity testing using Aliivibrio fischeri and Heterocypris incongruens.
• Subtoxicity biomarker assessment in Dreissena polymorpha.

Main Results:

• CNS treatment significantly reduced target contaminants in sludge.
• Dredging sludge exhibited genotoxicity, which was mitigated by CNS treatment.
• Toxicity tests confirmed the safety of the treated water.

Conclusions:

• Cross-linked nanocellulose is a promising material for freshwater sludge nanoremediation.
• The CNS-based system effectively removes contaminants and reduces genotoxicity.
• This eco-friendly approach offers a safe solution for contaminated matrix remediation.