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首页> 外文期刊>Desalination and water treatment >Facile and economic one-pot synthesis of rigid functional-polyurethane for the effective treatment of heavy metal-contaminated urban storm water run-off
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Facile and economic one-pot synthesis of rigid functional-polyurethane for the effective treatment of heavy metal-contaminated urban storm water run-off

机译：刚性函数聚氨酯的刚性和经济单罐合成，有效治疗重金属污染的城市风暴水流

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摘要

In this study, highly permeable rigid polyurethanes (PU) incorporating calcium oxide (CaO) (PU/CaO) composite materials were prepared via a facile and economic one-pot synthesis method and characterized for remediation of heavy metal-contaminated urban storm water run-off (USR) in a fixed-bed column. Column tests were conducted to investigate various parameters, and data were interpreted using the Bed Depth Service Time model to predict service time. Among the media tested, 25% CaO-incorporated PU (PU/CaO-25) had the highest adsorption capacity of Cu(II). PU/CaO-25 had about 2.5-fold higher rigidity (0.38MPa) than a typical rigid polymer (0.15MPa). Hydraulic conductivity tests showed PU/CaO-25 (avg. 0.4mm) had a permeability (0.108cms(-1)) equivalent or higher than reference sands. Specific structural features of PU/CaO-25 and the remediation mechanism were also determined using FESEM/EDS, XRD, N-2 gas isotherm and chemical equilibrium modeling. Moreover, column tests using simulated USR showed that all heavy metals were removed by PU/CaO-25 to below their regulation levels at -1,100 bed volumes. Based on the physicochemical properties and functionality, PU/CaO-25 may be useful as an effective filter material in USR treatment and reuse applications.
机译：在该研究中，通过容易和经济的一盆合成方法制备掺入氧化钙（CaO）（PU / CaO）复合材料的高渗透刚性聚氨酯（PU），并进行重金属污染的城市风暴水流的修复OFF（USR）在固定床中。进行列测试以研究各种参数，并且使用床深度服务时间模型来解释数据以预测服务时间。在测试的培养基中，25％CAO掺入的PU（PU / CAO-25）具有最高的Cu（II）的吸附能力。 PU / CAO-25比典型的刚性聚合物（0.15MPa）高约2.5倍的刚性（0.38MPa）。液压导电性试验显示PU / CAO-25（AVG。0.4mm）具有渗透率（0.108cms（-1））当量或高于参考砂。 PU / CAO-25的具体结构特征和修复机理也使用FESEM / EDS，XRD，N-2气体等温线和化学平衡建模测定。此外，使用模拟USR的柱试验表明，所有重金属通过PU / CAO-25除去所有重金属，低于其调节水平在-1,100张床中。基于物理化学性质和功能，PU / CAO-25可用作USR处理和重用应用中的有效过滤材料。

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