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The spent electroless nickel plating (SENP) solution comprises abundant complexed nickel, hypophosphite, and phosphite ions, alongside scant organic additives. In this study, we introduced an innovative method that uses a combination of alkali and heat treatment-activated PMS to disrupt the nickel ion complexation, facilitating hypophosphite and phosphite oxidation, and the alkali acts as a precipitant for nickel. Consequently, nickel and phosphorus precipitated sequentially, enabling their efficient separation and recovery. With a 4 g L−1 PMS dose, the hypophosphite (H2PO2−) and phosphite (HPO32−) conversion rates reached 100% and 99.69%, respectively. After the precipitation and separation of the concentrated SENP solution, residual nickel and phosphorus levels significantly dropped to 10.91 mg L−1 and 12.29 mg L−1, respectively. Subsequently, capacitive deionization (CDI) concurrently removed nickel and phosphorus to comply with emission standard GB39731-2020. Under optimal conditions, nickel and total phosphorus removal efficiency reached 96.69% and 93.62%, respectively, and the residual concentration decreased to 0.36 mg L−1 and 0.78 mg L−1, respectively. This innovative, streamlined strategy was proposed for the green treatment and recovery of nickel and phosphorus resources from spent electroless nickel plating solutions. [ABSTRACT FROM AUTHOR]

Interlayer functionalization modulation is essential for modifying LDHs and improving their selectivity and adsorption capacity for target pollutants. In this work, Glu@NiFe-LDH was synthesized using a simple one-step hydrothermal method and tested for its ability to remove CrO42− from wastewater. The modification significantly increased the composite material's removal ability by 2–3 times, up to 98.36 mg g−1. The behavior of CrO42− adsorption on Glu@NiFe-LDH was further studied by adjusting the affecting factors (i.e., temperature, pH, contact time, initial concentration, and interfering substance), and the adsorption behavior was confirmed as a spontaneous and chemisorption process. And the result was that Glu@NiFe-LDH demonstrated high capacity, efficiency, stability, and selectivity for the adsorption of CrO42− in a single electrolyte and natural water containing competing anions. Furthermore, molecular dynamics simulations (NVT ensemble) were employed to further reveal the mechanism of glutamic acid modification on LDH at the microscopic scale. Additionally, the IRI analysis method revealed the mechanism of weak interaction between glutamic acid molecules and CrO42−. This study provides a detailed understanding of the intercalation mechanism involved in the amino acid modification of LDHs. It explains the adsorption mechanism of metal oxo-acid radicals by amino acid-modified LDHs from a theoretical perspective. The findings offer experiments and a theoretical basis for designing targeted adsorbents in the future. [ABSTRACT FROM AUTHOR]

A CNNs/Ag/AgCl (defined as CNAAC) plasmonic photocatalyst with efficient photocatalytic degradation ability was obtained by depositing Ag/AgCl nanoparticles on g-C3N4 nanosheets (CNNS). Methyl orange (MO) and rhodamine B (RhB) were selected to evaluate the photocatalytic degradation performance of the as-synthesized CNAAC plasmonic photocatalysts. Among all of the prepared CNAAC plasmonic photocatalysts, CNAAC4 showed the most efficient photocatalytic degradation performance under visible light. Recycling experiments were also performed to confirm the superior stability of CNAAC4. The synergistic effect between the surface plasmon resonance effect (SPR) of the Ag nanoparticles and the steady heterojunction of CNNs-Ag/AgCl may mainly contribute to the enhanced photocatalytic activity and high stability of CNAAC. [ABSTRACT FROM AUTHOR]

Correction for ‘Facile solvothermal synthesis of a high-efficiency CNNs/Ag/AgCl plasmonic photocatalyst’ by Youliang Wang et al., Phys. Chem. Chem. Phys., 2016, DOI: URL10.1039/c6cp04655j/URL. [ABSTRACT FROM AUTHOR]