Novel One-Pot Solvothermal Synthesis of High-Performance Copper Hexacyanoferrate for Cs+ Removal from Wastewater

Abstract

Efficient removal of radioactive cesium from complex wastewater is a challenge. Unlike traditional precipitation and hydrothermal synthesis, a novel vast specific surface area adsorbent of copper hexacyanoferrates named EA-CuHCF was synthesized using a one-pot solvothermal method under the moderate ethanol media characterized by XRD, SEM, EDS, BET, and FTIR. It was found that the maximum adsorption capacity towards Cs+ was 452.5 mg/g, which is far higher than most of the reported Prussian blue analogues so far. Moreover, EA-CuHCF could effectively adsorb Cs+ at a wide pH range and low concentration of Cs+ in geothermal water within 30 minutes, and the removal rate of Cs+ was 92.1%. Finally, the separation factors between Cs+ and other competitive ions were higher than 553, and the distribution coefficient of Cs+ reached up to 2.343 × 104 mL/g. These properties suggest that EA-CuHCF synthesized by the solvothermal method has high capacity and selectivity and can be used as a candidate for Cs+ removal from wastewater.

Progress in the preparation of Prussian blue-based nanomaterials for biomedical applications

“…Some representative ones are Ni-PBA, Co-PBA, and Mn-PBA, and there are many more. [82][83][84] PBA with a changed structure not only retains some of the original characteristics of PB, but also strengthens some of the original characteristics or adds some new characteristics according to the requirements. The most representative PBA is the typical Co 3 [Co(CN) 6 ] 2 ÁxH 2 O with a structure prepared from hexacyanocobaltate.…”

Novel Zr-Doped Thiostannate Spinning Fiber (Fiber-KZrTS) for Highly Efficient and Renewable Recovery of Cesium and Strontium from Geothermal Water

“…Thus far, chemical adsorption is the most promising method for efficient Cs + and Sr 2+ removal because of its easy operation, lower cost, negligible secondary pollution, and higher adsorption efficiency. − Some more common adsorbents are natural clay materials, , heteropoly acids, , Prussian blue, its analogues, , and so on. Among the above adsorbents, the layered metal sulfides (KMS) with S 2– ligands and exchangeable K + are gradually becoming the focus of most researchers’ attention because of their large adsorption capacity.…”