基于甘蔗渣衍生物的具有水肥一体化功能的含磷矿超级吸水剂。
Sugarcane bagasse derivative-based superabsorbent containing phosphate rock with water-fertilizer integration.
机构信息
College of Natural Resource and Environment, South China Agricultural University, Guangzhou 510642, China.
出版信息
Carbohydr Polym. 2012 Oct 1;90(2):820-6. doi: 10.1016/j.carbpol.2012.06.006. Epub 2012 Jun 15.
To improve the water-fertilizer utilization ratio and mitigate the environmental contamination, an eco-friendly superabsorbent polymer (SPA), modified sugarcane bagasse/poly (acrylic acid) embedding phosphate rock (MSB/PAA/PHR), was prepared. Ammonia, phosphate rock (PHR) and KOH were admixed in the presence of acrylic acid to provide nitrogen (N), phosphorus (P) and potassium (K) nutrients, respectively. Impacts on water absorption capacity of the superabsorbent polymer (SAP) were investigated. The maximum swelling capacity in distilled water and 0.9 wt.% (weight percent) NaCl solution reached 414 gg(-1) and 55 gg(-1) (water/prepared SAP), respectively. The available NPK contents of the combination system were 15.13 mgg(-1), 6.93 mgg(-1) and 52.05 mgg(-1), respectively. Moreover, the release behaviors of NPK in the MSB/PAA/PHR were also studied. The results showed that the MSB/PAA/PHR has outstanding sustained-release plant nutrients property.
为了提高水肥利用率并减轻环境污染，制备了一种环保型超吸水性聚合物（SPA），即改性甘蔗渣/聚丙烯酸包埋磷矿（MSB/PAA/PHR）。在存在丙烯酸的情况下，将氨、磷矿（PHR）和 KOH 混合，分别提供氮（N）、磷（P）和钾（K）养分。研究了超吸水性聚合物（SAP）的吸水性对其的影响。在蒸馏水中和 0.9 wt.%（重量百分比）NaCl 溶液中的最大溶胀能力分别达到 414 gg(-1) 和 55 gg(-1)（水/制备的 SAP）。组合系统中的有效 NPK 含量分别为 15.13 mgg(-1)、6.93 mgg(-1) 和 52.05 mgg(-1)。此外，还研究了 MSB/PAA/PHR 中 NPK 的释放行为。结果表明，MSB/PAA/PHR 具有出色的缓释植物营养特性。
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