Bezmialem Vakif University, Faculty of Pharmacy, 34093 Istanbul, Turkey.
Marmara University, Department of Chemistry, 34722 Istanbul, Turkey.
J Hazard Mater. 2019 Jun 5;371:406-414. doi: 10.1016/j.jhazmat.2019.03.037. Epub 2019 Mar 8.
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.
环境意识的提高导致人们对具有优异性能的生物质基材料的需求增加，而不是石油产品。本研究旨在制备淀粉网络作为吸附剂，用于去除多环芳烃（PAHs）。选择了两种类型的交联剂，即表氯醇（ECH）和戊二醛（GA），分别用于制备 Gel-E 和 Gel-G 网络。研究了所得材料的流变、溶胀和形态性能，作为淀粉、交联剂和碱浓度以及反应温度等各种反应参数的函数。流变学测量表明，虽然 Gel-E 水凝胶的网络形成强烈受 NaOH 和淀粉浓度的影响，但 Gel-G 水凝胶的强度主要取决于交联剂的用量。淀粉网络对三种模型 PAH 分子的吸附容量高达 1.42g/克吸附剂。尽管由于凝胶样品的孔径差异，Gel-E 网络的 PAH 吸附容量高于 Gel-G 凝胶，但由于它们具有较高的吸附容量、较低的成本和简单的制备方法，因此它们都是用于 PAH 吸附应用的有前途的生物吸附剂材料。
