Thanks Gulzar

they are some negative point for superabsorbent polymers that used in agriculture, because the risk of transfer of radicals into the food chains.

Hi Alaleh, could you please share any paper as reference?

Thank you

Actually, there is not any published article about this topic yet.

Thank you

For Superabsorbent Polymers used in agriculture, there is a sensitivity to saline activity (esp Sodium Adsorption Ratio) in irrigation water which limits it application in arid agricultural land; poor reversibility i.e. water retention decreases with repetitive absorptions and depends on the % of soluble polymers. Ref.TK Mudiyanselage & DC Neckers, J Polymer Science Part A: Polymer Chemistry Vol 46, 1357-1364 (2008) Wiley InterScience

This depends on the application as well. For example: in cementitious materials a degradable SAP is mostly unwanted as it will not do its purpose to sustain a promoted autogenous healing reaction in time, while a degrading SAP is useful for biomedical applications such as smart pills. Article Stability of Pluronic F127 bismethacrylate hydrogels: Realit...

Swelling of SAP particles are sensitive to pH value and concentrations of ionic species.

The main disadvantages of SAP is the creation of voids after they release internal curing water (absorbed water) leading to reduced mechanical properties. Please refer to the following article for complete information:

Robust evaluation of superabsorbent polymers as an internal curing agent in cementitious composites

Article Robust evaluation of superabsorbent polymers as an internal ...