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首页> 外文期刊>Journal of Hazardous Materials >Rheological characterization of starch gels: A biomass based sorbent for removal of polycyclic aromatic hydrocarbons (PAHs)
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Rheological characterization of starch gels: A biomass based sorbent for removal of polycyclic aromatic hydrocarbons (PAHs)

机译：淀粉凝胶的流变学表征：一种基于生物质的吸附剂，用于去除多环芳烃（PAH）

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摘要

Environmental awareness increased the demand for the biomass based materials with superior properties instead of petroleum products. This study aims to prepare starch networks as sorbents for the removal of polycyclic aromatic hydrocarbons (PAHs). Two types of crosslinker, epichlorohydrine (ECH) and glutaraldehyde (GA), were choosed for the preparation of Gel-E and Gel-G networks, respectively. Rheological, swelling and morphological properties of the resulted materials were investigated as a function of various reaction parameters as starch, crosslinker and base concentration and also reaction temperature. The rheological measurements showed that while network formation of Gel-E hydrogels was strongly affected by the NaOH and starch concentration, the strength of the Gel-G hydrogels mainly depends on the crosslinker amount. Starch networks showed high PAH sorption capacities up to 1.42 g per gram sorbent with three model PAH molecules. Although PAH sorption capacities of the Gel-E networks are higher than those of Gel-G gels due to the pore sizes differences of the gel samples, both of them are promising materials as biosorbent for the PAH sorption applications due to the relatively high sorption capacities, low cost and simple preparation methods.
机译：环保意识增加了对具有优异性能的生物质基材料而不是石油产品的需求。这项研究旨在制备淀粉网络作为吸附剂，以去除多环芳烃（PAHs）。分别选择了两种交联剂，环氧氯丙烷（ECH）和戊二醛（GA）来制备Gel-E和Gel-G网络。研究了所得材料的流变学，溶胀性和形态学性质，其是各种反应参数的函数，例如淀粉，交联剂和碱的浓度以及反应温度。流变学测量表明，虽然NaOH和淀粉浓度强烈影响Gel-E水凝胶的网络形成，但Gel-G水凝胶的强度主要取决于交联剂的量。淀粉网络显示出具有三种模型PAH分子的高PAH吸附能力，高达每克吸附剂1.42 g。尽管由于凝胶样品的孔径差异，Gel-E网络的PAH吸附能力高于Gel-G凝胶，但由于其相对较高的吸附能力，它们都有望成为PAH吸附应用的生物吸附材料。 ，成本低，制备方法简单。

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