Decontamination of radioactive wastewater: State of the art and challenges forward.

We report an efficient, reusable, and selective 6-aminothiouracil (ATA)-modified Zr(IV)-based adsorbent (defined as UiO-66-ATA(Zr)) for lead ion removal in water. The adsorption equilibrium time an...

Efficient Selective Removal of Pb(II) by Using 6-Aminothiouracil-Modified Zr-Based Organic Frameworks: From Experiments to Mechanisms

A review on emerging composite materials for cesium adsorption and environmental remediation on the latest decade

A new strategy (i.e., freezing) for the activation of IO4- for the degradation of aqueous organic pollutants was developed and investigated. Although the degradation of furfuryl alcohol (FFA) by IO4- was negligible in water at 25 °C, it proceeded rapidly during freezing at -20 °C. The rapid degradation of FFA during freezing should be ascribed to the freeze concentration effect that provides a favorable site (i.e., liquid brine) for the proton-coupled degradation process by concentrating IO4-, FFA, and protons. The maximum absorption wavelength of cresol red (CR) was changed from 434 nm (monoprotonated CR) to 518 nm (diprotonated CR) after freezing, which confirms that the pH of the aqueous IO4- solution decreases by freezing. The degradation experiments with varying experimental parameters demonstrate that the degradation rate increases with increasing IO4- concentration and decreasing pH and freezing temperature. The application of the IO4-/freezing system is not restricted to FFA. The degradation of four other organic pollutants (i.e., tryptophan, phenol, 4-chlorophenol, and bisphenol A) by IO4-, which was negligible in water, proceeded during freezing. In addition, freezing significantly enhanced the IO4--mediated degradation of cimetidine. The outdoor experiments performed on a cold winter night show that the IO4-/freezing system for water treatment can be operated without external electrical energy.

Activation of Periodate by Freezing for the Degradation of Aqueous Organic Pollutants

Facile fabrication of metakaolin/slag-based zeolite microspheres (M/SZMs) geopolymer for the efficient remediation of Cs+ and Sr2+ from aqueous media.

Effective, rapid and selective adsorption of radioactive Sr2+ from aqueous solution by a novel metal sulfide adsorbent.

Synthesis of a robust layered metal sulfide for rapid and effective removal of Sr2+ from aqueous solutions

Enhanced removal of iodide ions by nano Cu2O/Cu modified activated carbon from simulated wastewater with improved countercurrent two-stage adsorption.

A novel nanomaterial and its new application for efficient radioactive strontium removal from tap water: KZTS-NS metal sulfide adsorbent versus CTA-F-MF process

A synthesis method was introduced for the large-scale preparation of a nano Cu2O/Cu-modified activated carbon composite, L-nano Cu2O/Cu–C. As the adsorbent, the synthesized composite could efficiently remove radioactive iodide ions (I−) from simulated water. A lab-scale integrated novel countercurrent two-stage adsorption and membrane separator system was designed to assess the practical application of L-nano Cu2O/Cu–C. Stable and high I− removal efficiency was achieved during the operation of the system. The effluent met the water quality requirements, and the membrane fouling rate was lower. This study provides a potential process to treat water contaminated with radioactive I− in practical applications.

Lihua Dong

Papers

Effective, rapid and selective adsorption of radioactive Sr2+ from aqueous solution by a novel metal sulfide adsorbent.

Synthesis of a robust layered metal sulfide for rapid and effective removal of Sr2+ from aqueous solutions

Enhanced removal of iodide ions by nano Cu2O/Cu modified activated carbon from simulated wastewater with improved countercurrent two-stage adsorption.

A novel nanomaterial and its new application for efficient radioactive strontium removal from tap water: KZTS-NS metal sulfide adsorbent versus CTA-F-MF process

Large-scale synthesis of nano Cu 2 O/Cu–C for iodide removal in a novel countercurrent two-stage adsorption and membrane separator system