Edge nucleation and bridging effect synergistically in-situ sealed multiple heavy metals in soils.

The development of broad-spectrum remediation materials for soil heavy metals is an urgent problem in the environmental field. This study utilized oxygen-sulfur synergy sites in sulfonated cellulose/chitosan self-assembled gel (SMCG), which exhibited high affinity for Cu(II) and Ni(II), to induce and construct Cu-Ni bimetallic sulfides in situ. Through coupling with edge nucleation of Pb(II), Zn(II), and Cd(II), five heavy metals (Cu(II), Ni(II), Pb(II), Zn(II), and Cd(II)) were immobilized over the long term.

Magnetic graphene vacancies: atomic-scale O scissors mediated by antiferromagnetic exchange interaction-spin-orbit selective coupling effects.

The serious corrosion of electrode caused by hydrogen peroxide (HO) generated by noble metal catalyst through two-electron path is the key bottleneck of large-scale application of fuel cell. Based on the study of the structure-activity relationship between defect size and oxygen reduction reaction (ORR) activity of graphene, a strategy is proposed to use the single-atom vacancy (SAV) of graphene to induce electrons to preferentially fill the antibonding orbital (π*) of oxygen (O) and achieve four-electron path selectivity far exceeding conventional carbon defects via Yeager-type adsorption. Among them, a new mechanism of electron transfer induced by the magnetic properties of SAV and O (spin inversion induced by antiferromagnetic exchange and selective injection of the same spin orbitals (p-π*)) is the key to realize the strong electron transfer and shear of O.

NaHPO synergizes with organic matter to stabilize chromium in tannery sludge.

Heavy metal stabilization is an effective method to treat chromium in tannery sludge. Here we show that mainly investigated NaHPO (MSP) and organic matter (OM) to stabilize chromium in tannery sludge. The experimental investigation revealed that the addition of montmorillonite (MMT) and MSP samples showed a significant increase in the percentage of reducible and oxidizable Cr in the former compared to the samples with the addition of MMT.