英语翻译Zirconium phosphate (ZrP) has recently been demonstrated as an excellent sorbent for heavy metals due to its high selectivity,high thermal stability,and absolute insolubility in water.However,it cannot be readily adopted in fixed beds or

英语翻译Zirconium phosphate (ZrP) has recently been demonstrated as an excellent sorbent for heavy metals due to its high selectivity,high thermal stability,and absolute insolubility in water.However,it cannot be readily adopted in fixed beds or
英语翻译
Zirconium phosphate (ZrP) has recently been demonstrated as an excellent sorbent for heavy metals due to its high selectivity,high thermal stability,and absolute insolubility in water.However,it cannot be readily adopted in fixed beds or any other flowthrough system due to the excessive pressure drop and poor mechanical strength resulting from its fine submicrometer particle sizes.In the present study a hybrid sorbent,i.e.,polymer-supported ZrP,was prepared by dispersing ZrP within a strongly acidic cation exchanger D-001 and used for enhanced lead removal from contaminated waters.D-001 was selected as a host material for sorbent preparation mainly because of the Donnan membrane effect resulting from the nondiffusible negatively charged sulfonic acid group on the exchanger surface,which would enhance permeation of the targeted metal ions.The hybrid sorbent (hereafter denoted ZrP-001) was characterized using a nitrogen adsorption technique,scanning electron microscope (SEM),and X-ray diffraction (XRD).Lead sorption onto ZrP-001 was found to be pH dependent due to the ion-exchange mechanism,and its sorption kinetics onto ZrP-001 followed the pseudo-first-order model.Compared to D-001,ZrP-001 exhibited more favorable lead sorption particularly in terms of high selectivity,as indicated by its substantially larger distribution coefficients when other competing cations Na+,Ca2+,and Mg2+ coexisted at a high level in solution.Fixed-bed column runs showed that lead sorption on ZrP-001 resulted in a conspicuous decrease of this toxic metal from 40 mg/L to below 0.05 mg/L.By comparison with D-001 and ZrP-CP (ZrP dispersion within a neutrally charged polymer CP),enhanced removal efficiency of ZrP-001 resulted from the Donnan membrane effect of the host material D-001.Moreover,its feasible regeneration by diluted acid solution and negligible ZrP loss during operation also helps ZrP-001 to be a potential candidate for lead removal from water.Thus,all the results suggested that ZrP-001 offers excellent potential for lead removal from contaminated water.

英语翻译Zirconium phosphate (ZrP) has recently been demonstrated as an excellent sorbent for heavy metals due to its high selectivity,high thermal stability,and absolute insolubility in water.However,it cannot be readily adopted in fixed beds or
磷酸锆( zrp )最近被证明是一种优良的吸附剂重金属,由于它具有选择性高,热稳定性较高,绝对溶解在水中.不过,它不能轻易采用固定床上或任何其他flowthrough体系因过度的压降 穷人的机械强度因优良微米颗粒大小.在本研究一种混合吸附剂,即聚合物支zrp ,溶液分散zrp一个强酸性阳离子交换d - 001 ,用于加强除铅污染 水域.四- 001被选定作为东道主材料制备吸附剂,主要是因为在唐南膜效应产生 nondiffusible带负电荷的磺酸基在换热面,从而提高渗透的目标金属离子.复合吸附剂(以下简称zrp - 001 )的特点是用氮气吸附技术,扫描电子显微镜( SEM ) 和X光衍射( XRD ) .铅吸着洒zrp 001发现是pH依赖因离子交换机制,及其吸附动力学洒zrp 001遵循伪阶模型.比575.75 001 ,zrp 001呈现更有利的铅吸着尤其是在高选择性,如其大幅度的分配系数,当其他竞争阳离子钠,钙,Mg2+和共存,在高水平的解决办法.固定床专栏运行表明铅吸附zrp 001导致了突出的减少这种有毒金属从40 毫克/公升降至0.05毫克/公升 相比之下与D- 001和zrp - cp ( zrp分散在一个中立的电荷高分子cp ) 强化去除率zrp 001来源于唐南膜效果东道主材料d 001 .此外,其可行的再生稀酸溶液和微不足道zrp损失,在操作时也有利于zrp - 001是一种潜在 候选人带领去除水中.因此,所有的研究结果表明zrp - 001提供了极好的潜力,为消除铅污染的水.
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