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Based on the in-situ bimetallic co-gelation process, the high dispersion of Cu in the Cu/Fe 3 O 4 -BMMA was realized, providing conditions for the efficient elimination of I 2. The adsorption experiments showed that Cu/Fe 3 O 4 -BMMA has good I 2 adsorption capacity (631.3 mg/g) and fast capture kinetics (equilibrium time <30 min). In addition, Cu/Fe 3 O 4 -BMMA was able to effectively remove trace I 2 in the solution from ppm level (1.0 ppm) down to ppb level (≤30 ppb). The adsorbed I 2 was converted into stable CuI, avoiding secondary pollution due to desorption. Notably, the used Cu/Fe 3 O 4 -BMMA was able to be separated from the solution by simple magnetic suction, which greatly improved the efficiency and reduced the recovery cost. Overall, this study provides a potentially efficient iodine capture material for long-term decay storage of radioactive iodine. [Display omitted] • The Cu in Cu/Fe 3 O 4 -BMMA exhibited high reactivity and utilization. • Cu/Fe 3 O 4 -BMMA can effectively reduce I 2 and adsorb it to generate stable CuI. • Cu/Fe 3 O 4 -BMMA exhibited a high removal rate of trace I 2 in actual environments. • The used adsorbents can be rapidly recovered by magnetic adsorption. Adsorption is considered to be one of the most effective methods to remove radioiodine from the solution. However, developing highly efficient adsorbents and the rapid recovery of the used adsorbents is still a challenge. Here, a series of Cu/Fe 3 O 4 bimetallic mutual-doping magnetic aerogels (Cu/Fe 3 O 4 -BMMA) were synthesized. Based on the in-situ bimetallic co-gelation process, the high dispersion of Cu in the aerogel was realized, providing conditions for the efficient elimination of I 2. The Fe3+ in the initial gel was reduced to magnetic Fe 3 O 4 during the preparation process, allowing for the quick recovery of the adsorbent through the application of a magnetic field. The adsorption experiments showed that Cu/Fe 3 O 4 -BMMA has good I 2 adsorption capacity (631.3 mg/g) and fast capture kinetics (equilibrium time < 30 min). In addition, Cu/Fe 3 O 4 -BMMA was able to effectively remove trace I 2 in the solution from ppm level (1.0 ppm) down to ppb level (≤30 ppb). The adsorbed I 2 was converted into stable CuI, avoiding secondary pollution due to desorption. Overall, this study provides a potentially efficient iodine capture material for long-term decay storage of radioactive iodine. [ABSTRACT FROM AUTHOR]

The bimetallic sulfide/carbon composite CoFeS-NC was successfully synthesized using a facile ligand exchange pathway and subsequent pyrolysis method, using Fe-doped ZIF-67 as self-templates. The prepared CoFeS-NC was used as an activator for peroxymonosulfate (PMS) to degrade ceftiofur sodium (CFS). The CoFeS-NC/PMS system demonstrated broad pH adaptability, considerable environmental stability and outstanding degradation efficiency for an array of pollutants. Notably, this system reached its optimum performance with the combination of 0.1 g/L CoFeS-NC and 0.3 g/L PMS at pH = 9. Under these optimized conditions, the CFS degradation efficiency reached 96% within 10 min and the kinetic constant reached 0.87 min−1. The reactive oxygen species (ROS) generated in the CoFeS-NC/PMS system were elucidated by conducting quenching experiments and electron paramagnetic resonance (EPR) studies. Both singlet oxygen (1O 2) and sulfate radicals (SO 4 ·-) were identified as the important ROS in CFS degradation. Moreover, various characterization methods were employed to elucidate the physicochemical properties of catalysts. Additionally, the role of Fe, Co and S species in CoFeS-NC was systematically investigated. Based on these findings, the possible catalytic mechanism was proposed. This study shows extraordinary potential for efficient removal of emerging pollutants in wastewater treatment applications. [Display omitted] • Successfully prepared bimetallic sulfide/carbon composite CoFeS–N by a simple method. • CoFeS-NC exhibited excellent degradation activity against the CFS. • The synergistic effect of Co, Fe and S species was elucidated. • CoFeS-NC exhibited good reusability and environmental adaptability. [ABSTRACT FROM AUTHOR]

Radioactive iodine generated from nuclear waste and nuclear accidents can cause serious hazards to the environment and human body. In this study, bismuth-doped ZIF-8 composites (Bi 2 O 3 @ZIF-8) were synthesized by in situ synthesis at room temperature to study their adsorption of iodine in gaseous state and in solution. The Bi 2 O 3 @ZIF-8 composites were characterized and analyzed by means of tests. Bi 2 O 3 @ZIF-8 exhibited high specific surface area and contained abundant microporous structures. However, when the bismuth doping amount reached 10%, 10%-Bi 2 O 3 @ZIF-8 appeared mesoporous. The specific surface area of 1%-Bi 2 O 3 @ZIF-8, 5%-Bi 2 O 3 @ZIF-8 and 10%-Bi 2 O 3 @ZIF-8 could reach 1110.6 m2/g, 973.21 m2/g and 927.82 m2/g, respectively. The adsorption of gaseous iodine by 5%-Bi 2 O 3 @ZIF-8 reached equilibrium after 3.5 h with the maximum adsorption capacity of 298 wt%. And the maximum adsorption capacity of iodine in solution was 751.4 mg/g. The effects of the initial concentration of the solution, reaction temperature and contact time on the adsorption process were investigated. The adsorption of Bi 2 O 3 @ZIF-8 on iodine was consistent with the pseudo-second-order kinetics and the Langmuir model. The results of thermodynamic studies indicated that the adsorption of iodine by Bi 2 O 3 @ZIF-8 was spontaneous and exothermic. This study provides a reference for the synthesis of metal organic framework-based materials and provides theoretical guidance for the removal of practical radioactive iodine. We synthesized composites of Bi 2 O 3 -ZIF-8 with different bismuth doping amounts for the adsorption of gaseous iodine as well as iodine in cyclohexane solution. [Display omitted] • Bismuth-doped ZIF-8 composites (Bi 2 O 3 @ZIF-8) were synthesized by in situ synthesis method. • Bi 2 O 3 @ZIF-8 had high specific surface area and contained abundant micropores. • The material with 10%-Bi 2 O 3 @ZIF-8 appeared mesopores. • Theses adsorbents adsorbed iodine in both gaseous and solution form. • The adsorption mechanism of radioactive iodine by Bi 2 O 3 @ZIF-8 was discussed. [ABSTRACT FROM AUTHOR]

Duchenne muscular dystrophy (DMD), the most common lethal muscular disorder, affects 1 in 5000 male births. It is caused by mutations in the X-linked dystrophin gene (DMD), and there is no effective treatment currently. Gene addition is a promising strategy owing to its universality for patients with all gene mutations types. In this study, we describe a site-specific gene addition strategy in induced pluripotent stem cells (iPSCs) derived from a DMD patient with exon 50 deletion. By using transcription activator-like effector nickases (TALENickases), the mini-dystrophin cassette was precisely targeted at the ribosomal RNA gene (rDNA) locus via homologous recombination with high targeting efficiency. The targeted clone retained the main pluripotent properties and was differentiated into cardiomyocytes. Significantly, the dystrophin expression and membrane localization were restored in the genetic corrected iPSCs and their derived cardiomyocytes. More importantly, the enhanced spontaneous contraction was observed in modified cardiomyocytes. These results provide a proof of principle for an efficient targeted gene addition for DMD gene therapy and represents a significant step toward precisely therapeutic for DMD. • Site-specific integrated mini-dystrophin into rDNA locus in DMD-iPSCs. • Dystrophin expression and localization were restored in targeted iPSCs and iCMs. • The enhanced spontaneous contraction was observed in the targeted iCMs. [ABSTRACT FROM AUTHOR]