A comparative technical and environmental evaluation of products arising from the stabilization/solidification of secondary lead metallurgical slag into a cement matrix was performed. Provided samples of an industrial slag generated in the process of recovery of lead from automotive batteries (Engitec CX process), were used in experimental work. Characterization of slag by X-ray Diffraction (XR...

The solid-liquid interface reaction between phosphate rock (PR) and metals (Pb, Cu, and Zn) was studied. Phosphate rock has the highest affinity for Pb, followed by Cu and Zn, with sorption capacities of 138, 114, and 83.2 mmol/kg PR, respectively. In the Pb-Cu-Zn ternary system, competitive metal sorption occurred with sorption capacity reduction of 15.2%, 48.3%, and 75.6% for Pb, Cu, and Zn, ...

A lightweight aggregate was produced by sintering the mixture of gold mine tailings, red mud, and limestone at 1150 ◦C. The physical (i.e., skid resistance, abrasion resistance, and bond strength) and environmental (i.e., leachability) feasibility of this aggregate was assessed to consider its potential use as a construction material for bicycle lanes. The skid resistance (British pendulum numb...

This study stabilizes and bloats Cr(VI)-sorbed bentonite by heating at high temperature. Cr leaching decreases with increasing temperatures. Heating the sample at 1100 1C results in a non-detectable Cr concentration in the leachate, equivalent to a Cr leaching percent less than 0.001% (i.e., Cr TCLP concentration o0.018mg of Cr L 1 of leachate). Morphology observed with a scanning electron micr...

Batch and column tests were performed utilizing natural siderite to remove As(V) and As(III) from water. One hundred milligrams of siderite was reacted at room temperature for up to 8 days with 50 mL of 1000 microg/L As(V) or As(III) in 0.01 M NaCl. Arsenic concentration decreased exponentially with time, and pseudoequilibrium was attained in 3 days. The estimated adsorption capacities were 520...

This study proved that vermiculite, a natural occurring mineral, can effectively remove and stabilize Cr(VI) from fine ferrochrome dust leachate. Batch adsorption studies were carried out to determine the effect of pH, contact time and adsorbent dose on the removal of Cr(VI). The process was found to be highly pH dependent. The optimum conditions for the Cr(VI) removal are at a pH of 1.5, conta...

Artisanal and small-scale gold is known to be sources of mercury pollution. This contamination occurs when isolated by the amalgamation method, occurs. Mercury pollution in artisanal mining Kulon Progo area Yogyakarta, lowest tailing content was 164.49 mg kg<sup>-1</sup>, highest 383.21 kg<sup>-1</sup>. value exceeded quality standard stipulated Indonesian Government Reg...

Abstract Background and aim The use of amendments to immobilize metals in polluted soils is a widely accepted remediation approach, the framework circular economy, produced from mining and/or biomass waste have gained relevance. However, application such can also mobilize metalloids. Here we propose combination nanoscale zero-valent iron nanoparticles (nZVI) with dunite (mining waste) compost f...

Tricalcium silicate (C3S) as clinker minerals was synthesized to investigate the solidification/stabilization (S/S) mechanism of lead, chromium and zinc ions on cement matrix. Effects of various hydration phases on the S/S mechanism were analyzed using XRD, SEM-EDS and heat evolution. Lead, chromium and zinc leachability from solidified hydration phases were also investigated using the toxicity...

The present research includes the safe disposal of lead-acid batteries slag using waste materials such as red mud and fly ash. The aim of this study is to investigate the adsorption of lead removal from lead acid-batteries slag on red mud and fly ash using 2 full factorial design. The combined effects of adsorbent amount, temperature, adsorbent type and leachate solution on the lead removal ads...