Department of Applied Chemistry, University of Johannesburg, South Africa.
Carbohydr Polym. 2013 Oct 15;98(1):397-404. doi: 10.1016/j.carbpol.2013.06.026. Epub 2013 Jun 26.
Biodegradation studies of Gum ghatti (Gg) and acrylamide-co-acrylic acid based flocculants [Gg-cl-poly(AAm-co-AA)] have been reported using the soil composting method. Gg-cl-poly(AAm-co-AA) was found to degrade 89.76% within 60 days. The progress of biodegradation at each stage was monitored through FT-IR and SEM. Polymer was synthesized under pressure using potassium persulphate-ascorbic acid as a redox initiator and N,N'-methylene-bis-acrylamide as a crosslinker. Synthesized polymer was found to show pH, temperature and ionic strength of the cations dependent swelling behavior. Gg-cl-poly(AAm-co-AA) was utilized for the selective absorption of saline from different petroleum fraction-saline emulsions. The flocculation efficiency of the polymer was studied as a function of polymer dose, temperature and pH of the solution. Gg-cl-poly(AAm-co-AA) showed maximum flocculation efficiency with 20 mol L(-1) polymer dose in acidic medium at 50 °C.
采用土壤堆肥法对 Gum ghatti（Gg）和丙烯酰胺-丙烯酸基絮凝剂[Gg-cl-poly（AAm-co-AA）]进行了生物降解研究。结果表明，Gg-cl-poly（AAm-co-AA）在 60 天内降解了 89.76%。通过傅里叶变换红外光谱（FT-IR）和扫描电子显微镜（SEM）监测了每个阶段的生物降解进展。该聚合物是在压力下使用过硫酸钾-抗坏血酸作为氧化还原引发剂和 N，N'-亚甲基双丙烯酰胺作为交联剂合成的。合成的聚合物表现出依赖于 pH 值、温度和阳离子离子强度的溶胀行为。Gg-cl-poly（AAm-co-AA）用于从不同石油馏分-盐水乳液中选择性吸收盐水。研究了聚合物剂量、溶液 pH 值和温度对聚合物絮凝效率的影响。Gg-cl-poly（AAm-co-AA）在 50°C 的酸性介质中，在 20mol/L 聚合物剂量下表现出最大的絮凝效率。
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