Iron supported on bioinspired green silica for water remediation.
Iron supported on bioinspired green silica for water remediation.
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DOI：
10.1039/c6sc02937j
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发表时间：
2017-01-01
期刊：
影响因子：
8.4
通讯作者：
Gibson LT
中科院分区：
文献类型：
--
作者：
Alotaibi KM;Shiels L;Lacaze L;Peshkur TA;Anderson P;Machala L;Critchley K;Patwardhan SV;Gibson LT
我们首次报道了二氧化硅负载铁的绿色合成用于水修复。铁以前曾用于水的净化，无论是不支持还是支持粘土，聚合物，碳或陶瓷，如二氧化硅。然而，报道的合成过程繁琐，冗长（涉及各种步骤），并且利用或产生有毒化学物质。本文报道了一种简单、快速、仿生的绿色合成方法，首次制备了绿色纳米二氧化硅材料（Fe@GN）上的铁家族，为水修复创造了新的技术解决方案。特别是，Fe@GN被用于去除砷酸盐，作为水溶液中潜在有毒元素的模型。采用多种表征技术研究了新型Fe@GN的物理、结构和化学性质。当被评估为去除砷酸盐的吸附平台时，Fe@GN表现出高的吸附能力（每克Fe@GN 69毫克砷），具有优异的动力学（每克吸附剂每小时达到~ 35毫克砷）-比迄今为止报道的最高去除率高出三倍。此外，还开发了一种再生Fe@GN的方法，允许在随后的提取中完全回收和再利用吸附剂；强烈强调这些新型绿色材料的潜在技术优势。
We report, for the first time a green synthesis of iron supported on silica for water remediation. Iron has been used previously in water decontamination, either unsupported or supported on clays, polymers, carbons or ceramics such as silica. However, the reported synthesis procedures are tedious, lengthy (involving various steps), and either utilise or produce toxic chemicals. Herein, the use of a simple, rapid, bio-inspired green synthesis method is reported to prepare, for the first time, a family of iron supported on green nanosilica materials (Fe@GN) to create new technological solutions for water remediation. In particular, Fe@GN were employed for the removal of arsenate ions as a model for potentially toxic elements in aqueous solution. Several characterization techniques were used to study the physical, structural and chemical properties of the new Fe@GN. When evaluated as an adsorption platform for the removal of arsenate ions, Fe@GN exhibited high adsorption capacity (69 mg of As per g of Fe@GN) with superior kinetics (reaching ∼35 mg As per g sorbent per hr) – threefold higher than the highest removal rates reported to date. Moreover, a method was developed to regenerate the Fe@GN allowing for a full recovery and reuse of the adsorbent in subsequent extractions; strongly highlighting the potential technological benefits of these new green materials.