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Agro-Industrial Waste Materials as Substrates for the Production of Poly(3-Hydroxybutyric Acid)
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作者 Artun Sukan Ipsita Roy Tajalli Keshavarz 《Journal of Biomaterials and Nanobiotechnology》 2014年第4期229-240,共12页
Accumulation of recalcitrant plastics in the environment has become a world-wide problem in today’s societies. Rapid depletion of natural resources for synthetic plastics along with environmental concerns has directe... Accumulation of recalcitrant plastics in the environment has become a world-wide problem in today’s societies. Rapid depletion of natural resources for synthetic plastics along with environmental concerns has directed research towards finding alternatives to petroleum-based polymers. Poly(3-hydroxybutyric acid) P(3HB), as one of these alternatives, have attracted much attention in recent years due to their varied mechanical properties, biocompatibility and biodegradability. The aim of this study was to identify an agro-industrial waste resource economically suitable for large-scale production of P(3HB), to optimize the production using Response Surface Methodology in small-scale and subsequently, to test the production in a continuously stirred tank reactor. Among a range of agro-industrial waste, orange peel was selected as the most suitable for P(3HB) production. P(3HB) concentration of 1.24 g P(3HB)/L culture broth with 41% P(3HB)/dcw yield was obtained using orange peel as the sole carbon source in optimized medium with a modified strain of Bacillus subtilis (B. subtilis OK2). 展开更多
关键词 Agro-Industrial WASTES CCD STR orangepeel Optimisation Poly(3-Hyrdroxybutyric Acid)
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电解铝液直接铸轧生产瓶盖用8011-H16铝合金板工艺研究 被引量:7
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作者 付世强 《轻合金加工技术》 CAS 北大核心 2014年第8期33-37,共5页
由于铝质瓶盖需经多道次连续冲制而成,以及对瓶盖外观印烫质量的高标准要求,目前其铝板材大多采用热轧供坯方式生产。铸轧坯比热轧坯在材料的内部冶金质量、晶粒度、制耳率、高低倍组织和力学性能的控制方面仍存在诸多困难,尤其是用电... 由于铝质瓶盖需经多道次连续冲制而成,以及对瓶盖外观印烫质量的高标准要求,目前其铝板材大多采用热轧供坯方式生产。铸轧坯比热轧坯在材料的内部冶金质量、晶粒度、制耳率、高低倍组织和力学性能的控制方面仍存在诸多困难,尤其是用电解铝液直接铸轧生产。本研究采用成本更低的电解铝液直接铸轧坯试制瓶盖用8011-H16铝合金板,通过对材料的成分设计、铸轧工艺控制、高温均匀化处理、退火时板材厚度的摸索、料卷温度的控制、轧辊参数的优化等综合试验研究,成功试制并批量生产出了合格的板材。 展开更多
关键词 电解铝液 铸轧 瓶盖用8011-H16铝合金板 高温均匀化 制耳率 U形纹 橘皮纹 深冲性能
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羟基磷灰石合成及吸附铅离子研究 被引量:2
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作者 张浩 张思文 黄晓佩 《广东化工》 CAS 2018年第16期93-96,共4页
以脐橙皮为模板、贝壳粉为原料合成羟基磷灰石(HAP)并用于去除水溶液中的Pb2+。探讨了HAP投放量、pH、反应时间、初始浓度、温度等因素对HAP吸附Pb2+的影响。结果表明,HAP的最佳用量为0.1 g,最佳pH为5.0,平衡时间2 h。等温吸附较好的符... 以脐橙皮为模板、贝壳粉为原料合成羟基磷灰石(HAP)并用于去除水溶液中的Pb2+。探讨了HAP投放量、pH、反应时间、初始浓度、温度等因素对HAP吸附Pb2+的影响。结果表明,HAP的最佳用量为0.1 g,最佳pH为5.0,平衡时间2 h。等温吸附较好的符合Freundlich模型,15℃、25℃、35℃下的饱和吸附量分别为83.37 mg/g、90.06 mg/g、109.44 mg/g。吸附的机理主要是离子交换,孔内扩散是速控步骤。 展开更多
关键词 羟基磷灰石 脐橙皮 等温吸附 解吸
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