Immobilized phosphate‐binding protein can effectively discriminate against arsenate during phosphate adsorption and recovery
Immobilized phosphate‐binding protein can effectively discriminate against arsenate during phosphate adsorption and recovery
复制标题
固定化磷酸盐结合蛋白可在磷酸盐吸附和回收过程中有效区分砷酸盐
DOI：
10.1002/wer.1498
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发表时间：
2020
影响因子：
3.1
通讯作者：
Mayer, Brooke K.
中科院分区：
文献类型：
--
作者：
Venkiteshwaran, Kaushik;Wells, Erin;Mayer, Brooke K.
通过确保国内可再生磷酸盐（Pi）资源用作农业肥料，大力推动建立循环磷经济。离子交换等可逆吸附技术可以去除和回收水/废水中的pii并进行再利用。然而，由于砷酸盐（As(V)）与砷酸盐（As(V)）的化学结构相似，现有的可逆吸附剂不能有效鉴别砷酸盐（As(V)）。如果As(V)与Pi共回收，则回收产品用于农业再利用的价值很低。本研究的目的是构建固定化磷酸结合蛋白（PBP）为基础的Piremoval and recovery体系，并分析其在As(V)存在下对Piremoval的选择性。测试了一系列条件，包括独立、顺序和同时暴露于固定PBP （PBP树脂）的两个氧阴离子。在高pH （pH 12.5）条件下对吸附的氧离子进行控制解吸，评价回收Piproduct的纯度。即使As(V)最初的浓度是Pi的两倍，pico也占回收产物中吸附氧离子的97%以上。因此，PBP树脂具有选择性去除Pi的潜力，并释放出不含as (V)污染的高纯度PBP，适合随后的农业再利用。现有的可逆磷酸（Pi）吸附剂由于其化学结构相似，不能有效区分砷酸盐（As(V)）。Pican对As(V)的Co回收减少了回收产物作为肥料的再利用。固定化磷酸结合蛋白（PBP）体系在As(V)存在下对Pieven具有高选择性。即使As(V)的浓度是Pi的2倍，pico仍占回收产物的97%以上。固定化PBP与现有的pi吸附剂相比具有优势，它提供了高纯度的无砷(V)污染的pi产品，可以重复使用。
There is a strong impetus to establish a circular phosphorus economy by securing internally renewable phosphate (Pi) resources for use as agricultural fertilizers. Reversible Piadsorption technologies such as ion exchange can remove and recover Pifrom water/wastewater for reuse. However, existing reversible adsorbents cannot effectively discriminate against arsenate (As(V)) due to the similarity between As(V) and Pichemical structure. If As(V) is co‐recovered with Pi, the value of the recovered products for agricultural reuse is low. The objective of this study was to construct an immobilized phosphate‐binding protein (PBP)‐based Piremoval and recovery system and analyze its selectivity for Piadsorption in the presence of As(V). A range of conditions was tested, including independent, sequential, and simultaneous exposure of the two oxyanions to immobilized PBP (PBP resin). The purity of the recovered Piproduct was assessed after inducing controlled desorption of the adsorbed oxyanions at high pH (pH 12.5). Piconstituted more than 97% of the adsorbed oxyanions in the recovered product, even when As(V) was initially present at twofold higher concentrations than Pi. Therefore, PBP resin has potential to selectively remove Pi, as well as release high‐purity Pifree of As(V) contamination suitable for subsequent agricultural reuse.Practitioner pointsExisting reversible phosphate (Pi) adsorbents cannot effectively discriminate against arsenate (As(V)) due to the similarity in their chemical structure.Co‐recovery of As(V) with Pican reduce the recovered product's reuse as a fertilizer.An immobilized phosphate‐binding protein (PBP)‐based system can be highly selective for Pieven in the presence of As(V).Piconstituted more than 97% of the recovered product, even when As(V) was present at 2‐fold higher concentrations than Pi.Immobilized PBP offers advantages over existing Piadsorbents by providing high‐purity Piproducts free of As(V) contamination for reuse.
影响因子：
11.4
作者：
Cortinas, I;Field, JA;Sierra-Alvarez, R
通讯作者：
Sierra-Alvarez, R
使用固定化磷酸盐结合蛋白去除和回收磷酸盐
影响因子：
7.5
作者：
Venkiteshwaran, Kaushik;Pokhrel, Nilisha;Hussein, Faten;Antony, Edwin;Mayer, Brooke K.
通讯作者：
Mayer, Brooke K.
影响因子：
2.9
作者：
Solscheid C;Kunzelmann S;Davis CT;Hunter JL;Nofer A;Webb MR
通讯作者：
Webb MR