Utilisation of biochar and superabsorbent polymers for soil amendment.

Area of Science:

• Soil Science
• Environmental Science
• Materials Science

Background:

• Degraded lands present ecological, energy, and economic challenges.
• Superabsorbent polymers (SAPs) and biochars are proposed as solutions, mimicking natural humus.
• These materials possess hydrophilic properties and functional groups that interact with soil components.

Purpose of the Study:

• To review the current knowledge on the application of SAPs and biochars to stressed lands.
• To evaluate the claimed benefits of these substances on soil properties and plant growth.
• To consider the broader environmental implications and identify research gaps.

Main Methods:

• Literature review of existing research studies on SAPs and biochars.
• Analysis of reported effects on soil water availability, fertility, and structure.
• Evaluation of impacts on plant growth, emissions, and contaminant mitigation.

Main Results:

• SAPs and biochars increase plant-available water, enhancing plant survival during drought.
• They improve soil fertility, agricultural yields, structure, aeration, and water penetration.
• These substances reduce synthetic fertilizer/pesticide use, greenhouse gas emissions, and chemical leaching.

Conclusions:

• SAPs and biochars demonstrate significant potential for land remediation and sustainable agriculture.
• They promote plant growth, mitigate heavy metal toxicity and salinity effects.
• Further research is needed to fully understand their environmental implications and optimize application strategies.