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We report the one‐pot synthesis of ball‐like nanosphere structures composed of an α‐Fe core and an organic shell of ethylenediaminetetraacetic acid that connected together to form a nanochain necklace‐like morphology. The hierarchical zigzag nanochain sphere structures have branches growing in clumps, a large surface area, and spherical pore‐like cages and entrances for capture/trapping Cd2+ ions from water sources. The pH solution (i.e., at pH 5) plays a key role in the generation of actively negative surfaces along the entire nanochain sphere adsorbent, thereby creating surfaces with strong binding affinity to Cd2+ ions. The thermodynamic and kinetic characteristics indicated that the nanochain sphere adsorbent with macro‐ and meso‐cage caves and organically decorated surfaces show promise for the spontaneous and endothermic capturing of Cd2+ ion containments from water solutions. The zigzag nanochain mesoporous necklace‐like structure trapper (MNT) exhibited long‐term stability, indicating that it can be used several times (reduced waste volume). The adsorption efficiency and uptake of the deleterious Cd2+ ions retained even after multi‐particulate processing of reuse cycles. The pH‐dependent Cd2+ ion selectivity indicated high adsorption capacity (526.3 mg⋅g−1) and Cd2+ ion‐to‐MNT binding affinity, despite the addition of interfering cations or anions. The zigzag nanochain sphere necklace allows the development of a simple and effective adsorbent model for water purification and management of toxins.

The interaction of Cr(III), Mn(II), and Fe(III) ions with cyclodiphosphazane and thiourea monophosphazene derivatives was followed potentiometrically with the aim of determination of stability constants of (metal : ligand) 1:1 and 1:2 binary, and 1:1:1 ternary chelates at 25The stability of the complexes of both ligands was found to be Fe (III) > Mn(II) < Cr(III). The concentration distribution of the species formed in solution was evaluated. Binary and ternary solid complexes were prepared with the purpose of structural characterization using elemental analyses, molar conductance, IR, 1 HNMR and electronic spectra and thermogravimetric analysis. The data show that the ligands behave as neutral bidentate ligands, forming neutral chelates of monomeric nature.

Bagasse fly ash, a waste material generated in the sugar industry, collected from a local sugar firm at Kom‐Umbo district (42 km to the north of the midcity of Aswan), Aswan Governorate, Egypt, was used as a low cost and effective adsorbing surface for the removal of Cu2+, Ni2+, Zn2+, and Cr3+ from industrial waste water. The adsorption capacity was followed as a function of pH, adsorbent dose, metal ion concentration, shaking time, and divers ions. Under the optimum conditions used, more than 95% of some of the ions under study were successfully removed. The data were fitted using both Freundlich and Langmuir isotherms.