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Synthesis of carboxymethyl cellulose-g-poly (acrylic acid-co-acrylamide)/polyvinyl alcohol sponge as a fast absorbent composite and its application in coral sand soil.
- Source :
-
International Journal of Biological Macromolecules . Jul2023:Part 3, Vol. 242, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
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Abstract
- To improve the rapid absorption capacity of coral sand soil for rainfall, a composite of carboxymethyl cellulose-g-poly (acrylic acid- co -acrylamide)/polyvinyl al co hol sponge (CMC-g-P(AA-co-AM)/PVA) was designed and synthesized by coupling CMC-g-P(AA-co-AM) granules with a PVA sponge. The results showed that the rapid water absorption of CMC-g-P (AA-co-AM)/PVA in distilled water in 1 h was 26.45 g/g, twice that of CMC-g-P(AA-co-AM) and the PVA sponge, which is suitable for short-term rainfall. In addition, the cation had a slight influence on the water absorption capacity of CMC-g-P (AA-co-AM)/PVA, which were 29.5 and 18.9 g/g in 0.9 wt% NaCl and CaCl 2 solutions, respectively, indicating the great adaptability of CMC-g-P (AA-co-AM)/PVA to high‑calcium coral sand. With the addition of 2 wt% CMC-g-P (AA-co-AM)/PVA, the water interception ratio of the coral sand increased from 13.8 % to 23.7 %, and 54.6 % of the total interception water remained after 15-day evaporation. Moreover, pot experiments demonstrated that 2 wt% CMC-g-P(AA-co-AM)/PVA in coral sand enhanced plant development under water scarcity, suggesting that CMC-g-P (AA-co-AM)/PVA is a promising soil amendment for coral sand soils. • A fast water absorbent, (CMC-g-P(AA-co-AM)/PVA), is synthesized to amend coral sand soil. • CMC-g-P(AA-co-AM)/PVA is coupled with a superabsorbent resin and fast-absorbing sponge. • CMC-g-P(AA-co-AM)/PVA is salt-tolerant with great repeated water absorbency. • Amended soil could remain at 54.6 % of water interception after 15-day evaporation. • CMC-g-P(AA-co-AM)/PVA promotes the growth of water spinach under water scarcity. [ABSTRACT FROM AUTHOR]
- Subjects :
- *POLYVINYL alcohol
*SOIL amendments
*CORALS
*SAND
*WATER shortages
*SOILS
*RAINFALL
Subjects
Details
- Language :
- English
- ISSN :
- 01418130
- Volume :
- 242
- Database :
- Academic Search Index
- Journal :
- International Journal of Biological Macromolecules
- Publication Type :
- Academic Journal
- Accession number :
- 164283441
- Full Text :
- https://doi.org/10.1016/j.ijbiomac.2023.124965