The red mud (RM) has been used as an alternative low-cost adsorbent to remove trace elements, with the adsorption onto sodalite surface described main removal mechanism for elements. However, recent studies have shown that precipitation might be of great importance some metals using natural and thermal activated RM. Therefore, aim this study was identify responsible Cd(II), Pb(II) Zn(II) from a...

As an industrial solid waste, the discharge of a large amount red mud (RM) causes serious environmental problems; thus, proportion RM co-combustion has been proposed to solve consumption problem. In this paper, experiment with various proportions was conducted on 0.2 t/h circulating fluidized bed (CFB) boiler. Desulfurization performance, combustion characteristics, and ash deposition character...

Abstract In this study, the purification effect of red mud–loess mixture (RM–L) as a reactive medium in permeable barrier (PRB) for groundwater contaminated by acidic wastewater (AW) containing Mn(II) was explored considering removal capacity and pH value, safety on RM–L after evaluated. The breakthrough parameters were determined purifying performances toward AW evaluated fixed-bed column test...

Red mud, one of the mostly produced industrial wastes, was converted into a catalyst with exceptionally high and stable performance for hydrogen production from ammonia. Results showed that iron species produced after reduction of the HCl digested red mud were converted into ε-Fe2N during the induction period of ammonia decomposition reaction at 700 °C. The catalytic performance measurements in...

In this paper, a novel application of industrial waste, namely red mud (RM), in the abatement two malodorous and harmful sulfur compounds, dimethyl disulfide (DMDS) methyl mercaptan (MM), is presented. The effects calcination activations with hydrochloric acid or mixture orthophosphoric on properties performance RM are compared using laboratory-scale experiments. RM-based materials were charact...

Algae are a diverse group of aquatic organisms and have potential to produce renewable biofuel via hydrothermal liquefaction (HTL). This study investigated the effects reaction environments on biocrude production from “Tetraselmis sp.” algae strain by HTL process using red mud (RM) based catalyst. The inert (N2), ethylene (C2H4), reducing (10% H2/90% N2), oxidizing O2/90% N2) were applied non-c...

Results are presented from X-ray absorption spectroscopy based analysis of As, Cr, and V speciation within samples of bauxite ore processing residue (red mud) collected from the spill site at Ajka, Western Hungary. Cr K-edge XANES analysis found that Cr is present as Cr(3+) substituted into hematite, consistent with TEM analysis. V K-edge XANES spectra have E(1/2) position and pre-edge features...

Due to its alkalinity, red mud produced by the Bayer process may affect both the environment and human health. For this reason, its further utilization instead of disposal is of great importance. Numerous methods have already been studied for hydrometallurgical treatment of red mud, especially for the recovery of various metallic components such as iron, aluminum, titanium or rare earth element...

Red dish mud-rich sed i ments are com mon in sev eral karst ar eas, in the form of red sur face soils and clastic cave in fill ings. The or i gin and sig nif i cance of red sur face soils have been much de bated over re cent years, while clastic mud-rich sed i ments in cave en vi ron ments have re ceived less at ten tion from geoscientists. The ge netic re la tion ship be tween these two ma te ...

The rational utilization of solid waste has always been a worldwide concern. In this study, coal fly ash (CFA) and red mud (RM) were used in combination to synthesize efficient heavy metal adsorbents. A new way resource recycling was provided with the collaborative reuse CFA RM. To obtain modified composite materials, RM mixed melted three ratios. After modification, these materials then utiliz...