Removal of arsenic from copper smelting wastewater using zinc slag to synthesize scorodite

Shi, Jiahao; Duan, Xiaoxu; Qi, Xianjin; Li, Guohua; Yan, Guizhi; Wang, Heng

doi:10.1007/s10854-023-10376-z

Cited by 5 publications

(1 citation statement)

References 59 publications

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“…However, in conventional scorodite synthesis, the addition of seed crystals, such as scorodite or other heterogeneous crystals, has been observed to significantly promote scorodite formation. This is because seed feeding provides abundant active sites that facilitated the union and growth of this mineral on their surfaces [ 68 , 69 ]. Similarly, Tanaka and Okibe (2018) [ 70 ] have described a process for scorodite production through the oxidation of As and Fe using the extremophile archaea Acidianus brierley .…”

Section: Discussionmentioning

confidence: 99%

Effect of Micro-Nanobubbles on Arsenic Removal by Trichoderma atroviride for Bioscorodite Generation

Morales-Mendoza,

Flores-Trujillo,

Ramírez-Castillo

et al. 2023

JoF

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The global environmental issue of arsenic (As) contamination in drinking water is a significant problem that requires attention. Therefore, the aim of this research was to address the application of a sustainable methodology for arsenic removal through mycoremediation aerated with micro-nanobubbles (MNBs), leading to bioscorodite (FeAsO4·2H2O) generation. To achieve this, the fungus Trichoderma atroviride was cultivated in a medium amended with 1 g/L of As(III) and 8.5 g/L of Fe(II) salts at 28 °C for 5 days in a tubular reactor equipped with an air MNBs diffuser (TR-MNBs). A control was performed using shaking flasks (SF) at 120 rpm. A reaction was conducted at 92 °C for 32 h for bioscorodite synthesis, followed by further characterization of crystals through Fourier–Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), and X-ray diffraction (XRD) analyses. At the end of the fungal growth in the TR-MNBs, the pH decreased to 2.7–3.0, and the oxidation-reduction potential (ORP) reached a value of 306 mV at 5 days. Arsenic decreased by 70%, attributed to possible adsorption through rapid complexation of oxidized As(V) with the exchangeable ferrihydrite ((Fe(III))4-5(OH,O)12), sites, and the fungal biomass. This mineral might be produced under oxidizing and acidic conditions, with a high iron concentration (As:Fe molar ratio = 0.14). The crystals produced in the reaction using the TR-MNBs culture broth and characterized by SEM, XRD, and FTIR revealed the morphology, pattern, and As-O-Fe vibration bands typical of bioscorodite and römerite (Fe(II)(Fe(III))2(SO4)4·14H2O). Arsenic reduction in SF was 30%, with slight characteristics of bioscorodite. Consequently, further research should include integrating the TR-MNBs system into a pilot plant for arsenic removal from contaminated water.

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Section: Discussionmentioning

confidence: 99%