Modeling As(V) Removal in Iron Oxide Impregnated Activated Carbon Columns
Modeling As(V) Removal in Iron Oxide Impregnated Activated Carbon Columns
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氧化铁浸渍活性炭柱中 As(V) 去除建模
DOI：
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发表时间：
2007
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影响因子：
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通讯作者：
Edward H. Smith
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作者：
Ronald L. Vaughan;B. E. Reed;Edward H. Smith
浸渍到活性炭 (FeAC) 上的氧化铁具有很高的砷 (As) 去除能力，有可能用于现有的活性炭塔系统。本研究的目的是研究使用填充 FeAC 的固定床从水相系统中去除 As(V) 的情况，并确定具有均匀表面扩散模型 (HSDM) 的三层模型 (TLM) 是否可以描述柱中 As(V) 的去除情况。在不同的空床接触时间（EBCT）下进行快速小规模柱测试（RSSCT）。出水 As(V) 突破 (10 μg/L) 是 0.20 分钟 EBCT 实验的开始，而在突破发生之前，在 2.1 分钟 EBCT 下处理了约 2300 床体积的水，入口浓度为 1 mg/L As(V)。具有三个 As(V)-FeAC 表面反应的 TLM 与 HSDM 相结合，提供了 RSSCT 中 As(V) 去除的准确预测。
Iron oxide impregnated onto an activated carbon (FeAC) has a high arsenic (As) removal capacity with the potential to be used in existing activated carbon column systems. Objectives of this research were to investigate As(V) removal from aqueous-phase systems using fixed-beds packed with FeAC and to determine if the triple layer model (TLM) with the homogeneous surface diffusion model (HSDM) could describe As(V) removal in the columns. Rapid small-scale column tests (RSSCT) were conducted at various empty bed contact times (EBCT). Effluent As(V) breakthrough (10 μg∕L) was incipient for the 0.20-min EBCT experiment, whereas ∼2300 bed volumes of water at 1-mg/L inlet concentration of As(V) was treated at an EBCT of 2.1 min before breakthrough occurred. The TLM with three As(V)-FeAC surface reactions coupled with the HSDM provided accurate prediction of As(V) removal in the RSSCT.