| Comparative study of water absorbing and retaining characteristics of four superabsorbents |
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| DOI：10.7606/j.issn.1000-7601.2008.05.21 |
| Key Words: superabsorbent water absorbing water retaining water releasing pH |
| Author Name | Affiliation | | BAI Wenbo | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Environment & Climate Change, Ministry of Agriculture, Beijing 100081, China | | SONG Jiqing | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Environment & Climate Change, Ministry of Agriculture, Beijing 100081, China | | LI Maosong | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Environment & Climate Change, Ministry of Agriculture, Beijing 100081, China |
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| Abstract: |
| Experiment was made to compare water absorbing and retaining characteristics of four superabsorbents, and their corresponding response to different alkali-saline solutions. The results indicated that the water absorption rate was the largest in distilled water, while in 0.9% NaCl solution, it was the least. In 1:5 soil saturation extract, the water absorption rate of the superabsorbents was compared as the following: BJ＞WT＞BF＞HJ. The four superabsorbents could absorb water more than 200 times of their own weight, and the water absorption rate maintained over 50% of their original water absorption rate, even when they were reused for six times. BF and WT had the ability to absorb water quickly and release water slowly. We concluded that BF had the best water absorbing and retaining characteristics in four superabsorbents; secondly, it was WT. BJ and HJ were relatively worse. |
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