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首页> 外文期刊>Journal of Polymers and the Environment >Rapid Degradation of Superabsorbent Poly(Potassium Acrylate) and its Acrylamide Copolymer Via Thermo-Oxidation by Hydrogen Peroxide
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Rapid Degradation of Superabsorbent Poly(Potassium Acrylate) and its Acrylamide Copolymer Via Thermo-Oxidation by Hydrogen Peroxide

机译：通过过氧化氢热氧化通过热氧化的超吸收性聚（丙烯酸钾）及其丙烯酰胺共聚物的快速降解

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Superabsorbent poly(potassium acrylate) (P(KA)) and poly[acrylamide-co-(potassium acrylate)] (P(Am-co-KA)) were synthesized and their effective degradation via chemical and biological processes were pursued. Significant reductions in dry mass and water absorbency were observed after P(KA) (53% and 54%, respectively) and P(Am-co-KA) (43% and 40%, respectively) were buried in the soil for ten weeks, indicating their partial biodegradation. Although the living fungal culture failed to degrade the polymers, digestion by its crude peroxidase (20 U/g, 16 h) significantly decreased the dry mass (15%; 15.0 +/- 0.3 g) and water absorbency (13%; 16.0 +/- 1.0 g/g) of P(KA). Chemical oxidation using H2O2 at high temperature with/without peroxidase efficiently liquidized both polymers specifying significant changes of their structures. The maximum degradation of P(KA) (99.84% weight loss) was obtained when incubated with 12.8% (v/w) H2O2 at 65 degrees C for 7.3 h while 98.43% weight loss was achieved after P(Am-co-KA) was incubated with 14.8% (v/w) H2O2 at 68 degrees C for 9.2 h. To assess the phytotoxicity of the degraded products, their effect on seed germination was determined. No significant inhibition was observed in mung bean germinating on both the untreated polymers and their oxidized products. On sweet corn, the degraded products were apparently less inhibitory than did the untreated polymers. These results suggested that the rapid and efficient degradation of polyacrylate and its copolymer by the thermo-oxidation of H2O2 could be applied for a larger scale of superabsorbent waste management.[GRAPHICS].
机译：合成超吸收性聚（丙烯酸钾）（P（丙烯酸钾）和聚[丙烯酰胺 - 共钾）]（P（AM-CO-KA）），并追求其通过化学和生物过程的有效降解。在P（Ka）（分别为53％和54％）和P（AM-Co-Ka）（分别为43％和40％）后，观察到干含量和吸水性的显着降低（分别为43％，40％）浸入土壤中浸渍10周，表明他们部分生物降解。虽然活性真菌培养物未能降解聚合物，但其粗过氧化物酶（20u / g，16 h）消化显着降低了干含量（15％; 15.0 +/- 0.3g）和吸水性（13％; 16.0 + / - 1.0g / g）p（ka）。在高温下使用H 2 O 2的化学氧化有效液化的两种聚合物，这些聚合物指定其结构的显着变化。当在65℃下孵育7.3小时时，获得p（Ka）（99.84％重量损失）的最大降解（99.84％重量损失），而P（AM-Co-Ka）达到98.43％的重量损失在68℃下与14.8％（v / w）H 2 O 2一起温育9.2小时。为了评估降解产物的植物毒性，测定了它们对种子萌发的影响。在未处理的聚合物和它们的氧化产物上萌发的Mung Bean中没有显着抑制。在甜玉米上，降解的产物显然比未处理的聚合物显然较少。这些结果表明，通过H 2 O 2的热氧化可以快速高效地降解H 2 O 2的较大规模的超吸收性废物管理。[图形]。

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