Efficient incorporation of highly migratory thallium into struvite structure: Unraveling the stabilization mechanisms from a mineralogical perspective.

The remediation of high-concentration thallium (Tl) contaminated wastewater is a critical environmental concern. Current research emphasizes the effectiveness of adsorption and oxidation methods for Tl treatment, yet challenges persist in enhancing their performance. This study explores the feasibility of emergency Tl wastewater treatment and elucidates the mechanisms of Tl incorporation into mineral structures, with a focus on the struvite mineral as a framework for Tl integration via NH ion exchange.

New insight into the changes in metal-phosphonate complexes from the addition of CaCO to enhance ferric flocculation for efficient phosphonate removal.

Due to the stable chelating effect of organic phosphonates in wastewater, phosphonates with increasing emission are difficult to be removed effectively by traditional ferric salt flocculation, which has posed tough challenges for reducing total phosphorus pollution in recent years. In this work, calcium carbonate (CaCO) was introduced to work together with the widely investigated flocculant of ferric chloride (FeCl) to realize an efficient removal of nitrilotrismethylenephosphonic acid (NTMP) at much lower dosage of FeCl. With an aid of synergy effect from together use of CaCO and FeCl, the remaining concentration as low as 0.

In-situ production of iron flocculation and reactive oxygen species by electrochemically decomposing siderite: An innovative Fe-EC route to remove trivalent arsenic.

The removal of trivalent arsenic (As (III)) from water has received extensive attention from researchers. Iron electrocoagulation (Fe-EC) is an efficient technology for arsenic removal. However, electrode passivation hinders the development and application of Fe-EC.

Enhanced selective copper precipitation by mechanochemically activated benzene tricarboxylic acid.

Toward the treatment of waste solution containing heavy metals, direct precipitation of the metal ions from an acidic solution without alkaline neutralisation is still the greatest challenge. Based on the ligand properties of benzene tricarboxylic acid (BTC) to copper ions, a simple ball milling with 90 min at 400 rpm was used to activate BTC to enhance its capacity for copper removal from the pH of the original solution around 3-4. A set of analytical methods were used to characterise the activated BTC sample and BTC-Cu precipitate before and after copper precipitation.

Phosphate removal from aqueous solution by electrochemical coupling siderite packed column.

The use of iron species to remove PO is widely used, and the fresh Fe produced in situ demonstrate better effect on the removal of PO in many researches. Therefore, in order to develop a simpler and more efficient method for PO removal, we designed an easy operation by electrochemically dissolving siderite to produce fresh Fe in situ for PO removal from wastewater. Results showed that current intensity at 20 mA, initial pH at 6, initial PO concentration at 1 mM and influent flow rate at 2.

Activating CaCO to enhance lead removal from lead-zinc solution to serve as green technology for the purification of mine tailings.

Efficient lead removal from metal-containing wastewater, such as acid mine drainage (AMD), is an important step in environmental purification and secondary resources recovery. In this paper, a novel approach by mechanochemically activating CaCO through simply wet ball milling in metal-containing solution was developed, where selective Pb precipitation in the form of PbCO was achieved based on its reaction with the CO from the activated CaCO. By such milling operation, the removal efficiency of Pb from aqueous solution could reach over 99%, while more than 99% Zn (as well as Mn, Ni and Cd) was remaining in the solutions, demonstrating the feasibility and high effectiveness of precipitating Pb and serving the purpose of recovering other metals without Pb impurity.