Novel low-cost carboxymethyl cellulose microspheres with excellent fertilizer absorbency and release behavior for saline-alkali soil
Novel low-cost carboxymethyl cellulose microspheres with excellent fertilizer absorbency and release behavior for saline-alkali soil
复制标题
新型低成本羧甲基纤维素微球，对盐碱土壤具有优异的吸肥释肥性能
DOI：
10.1016/j.ijbiomac.2019.03.047
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发表时间：
2019-06-15
影响因子：
8.2
通讯作者：
Hu, Tongxin
中科院分区：
文献类型：
--
作者：
Qi, Houjuan;Ma, Rongxiu;Hu, Tongxin
土壤盐碱化和肥料流失严重制约着松嫩平原农业生产。为解决这一问题，采用反相乳液聚合与微流控相结合的方法，合成了具有均匀孔结构、高孔隙率、可生物降解的生物大分子和良好的肥料吸附性能的羧甲基纤维素固定化缓释肥料微球。通过优化合成条件，CFM在去离子水中的吸水率达到8725 gg（-1）。CFM的吸光度行为对pH值、离子强度和离子种类高度敏感。在5 g L-1尿素溶液中，CFM的吸附容量为3342.84 g g（-1）.该复合材料在80 ℃下保持5 h，在土壤中表现出良好的缓释性能。尼日尔曲霉对CFM的降解率在第3天接近98.2%。CFM具有高pH敏感性、耐盐性、吸肥保肥性好等优点。因此，在农业上将是一种很有前景的肥料缓释剂. (C)2019 Elsevier B. V.保留所有紧身衣。
Saline-alkali soil and fertilizer loss severely restrict agriculture on the Songnen Plain in China. To resolve this problem, carboxymethyl cellulose immobilized slow-release fertilizer microspheres (CFM) with homogeneity pore structure, high porosity, biodegradable biological macromolecules and excellent fertilizer absorbency were synthesized by the combination of inverse emulsion polymerization and microfluidic method. By optimizing the synthesis conditions, the water absorption of CFM reached 8725 gg(-1) in deionized water. The absorbency behaviors of CFM were highly sensitive to pH, ionic strength, and ionic species. In 5 g L-1 urea solution, the adsorption capacity of CFM was 3342.84 g g(-1). The CFM showed excellent urea retention at 80 degrees C for 5 h and sustained release performance in soil. Besides, degradation rate of CFM was closed to 98.2% in Aspergillus niger at the third day. CFM had the advantages of high pH sensitivity, salt resistance, and good fertilizer absorbency and retention. Therefore, it will be prospecting fertilizer sustained release agent in agriculture. (C) 2019 Elsevier B.V. All tights reserved.