Removal of lead ions by two Fe Mn oxide substrate adsorbents

Selective capacitive removal of Pb2+ ion contaminants from drinking water via nickel foam/Mn2CoO4@tannic acid-Fe3+ electrodes

“…In addition, when TA-Fe 3+ is coated, the bending vibration peak of –OH at 1388.52 cm −1 is significantly enhanced, meaning that TA might smoothly cover the surface of Mn 2 CoO 4 and occupy a large surface area, which is conducive to selective adsorption. 36 CO(NH 2 ) 2 + H 2 O→2NH 3 + CO 2 Mn 2+ + CO 2 + H 2 O→MnCO 3 + 2H + 2Mn 2+ + Co 2+ + CO 3 2− + 4H 2 O → CoMn 2 (OH) 4 CO 3 + 4H + 2CoMn 2 (OH) 4 CO 3 + O 2 → 2Mn 2 CoO 4 + 2CO 2 + 4H 2 O…”

“…In addition, when TA-Fe 3+ is coated, the bending vibration peak of -OH at 1388.52 cm À1 is significantly enhanced, meaning that TA might smoothly cover the surface of Mn 2 CoO 4 and occupy a large surface area, which is conducive to selective adsorption. 36 CO(NH 2 ) 2 + H 2 O-2NH 3 + CO 2 (6)…”

Effective adsorption of Pb(ii) from wastewater using MnO2 loaded MgFe-LD(H)O composites: adsorption behavior and mechanism

“…Importantly, it shows that our composite materials can be applied to water pollution of different heavy metals. Danni Chen et al 31 combine the oxidation performance of manganese oxide and the high adsorption capacity of iron oxide to remove lead ions. Hui Li et al 's findings explain that iron oxides on the surface of Fe 0 , such as goethite (FeOOH), provide binding sites for Pb( ii ).…”

Efficient solidification of Pb²⁺ by activated tungsten tailings and cement

“…Pb 2+ is an important source of pollution in wastewater with a wide range of sources. Non-ferrous metal mining, lead storage batteries, electronics, metal electroplating, steel manufacturing and other industries will produce a large amount of lead-containing wastewater (Chen et al, 2021;Katsou et al, 2011). Pb 2+ is not degradable and can exist in the environment for a long time, causing the Pb 2+ content in water and soil to exceed the standard (Liu et al, 2013), and causing serious harm to human health through the food chain (EI-Eswed et al, 2017;Yuan et al, 2021).…”