Mechanism study on manganese(II) removal from acid mine wastewater using red mud and its application to a lab-scale column

Li, Yongchao; He, Hong; Xu, Zheng; Ma, Hongqing; Guo, Yihang

doi:10.1016/j.jclepro.2020.119955

Cited by 50 publications

(16 citation statements)

References 57 publications

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“…Accordingly, the generation of nFe 3 O 4 and its iron-compound by-products were determined as detailed in the following equations: The formation of FeO(OH) could be attributed mainly to hydrolysis of FeCl 3 [82,83], the complexation of Fe(OH) 2 with Fe(OH) 3 , as well as the oxidation of Fe(OH) 2 and Fe 3 O 4 [32]. Hence, abundant surface groups and active sites were available after modification by nFe 3 O 4 .…”

Section: Adsorption Mechanism Reconstructionmentioning

confidence: 99%

Efficient Removal of Antimony(III) in Aqueous Phase by Nano-Fe3O4 Modified High-Iron Red Mud: Study on Its Performance and Mechanism

Peng

Luo

et al. 2021

Water

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The resource utilization of excess red mud produced from aluminum production is a current research focus. In this study, novel nano-Fe3O4 modified high-iron red mud material (HRM@nFe3O4) was fabricated using the method of co-precipitation to remove Sb(III) from the aqueous phase. The HRM@nFe3O4 at a nFe3O4:HRM mass ratio of 1:1 had optimal adsorbing performance on Sb(III) in water. Compared with others, the synthetic HRM@nFe3O4 sorbent had a superior maximum Sb(III) adsorption capacity of 98.03 mg·g−1, as calculated by the Langmuir model, and a higher specific surface area of 171.63 m2·g−1, measured using the Brunauer-Emmett-Teller measurement. The adsorption process was stable at an ambient pH range, and negligibly limited by temperature the coexisting anions, except for silicate and phosphate, suggesting the high selectivity toward Sb(III). HRM@nFe3O4 retained more than 60% of the initial adsorption efficiency after the fifth adsorption-desorption cycle. The kinetic data fitted by the pseudo-second-order model illustrated the existence of a chemical adsorption process in the adsorption of Sb(III). Further mechanism analysis results indicated that the complexation reaction played a major role in Sb(III) adsorption by HRM@nFe3O4. This HRM@nFe3O4 adsorbent provides an effective method for the removal of Sb(III) in wastewater treatment and is valuable in the reclamation of red mud.

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Section: Adsorption Mechanism Reconstructionmentioning

confidence: 99%

Efficient Removal of Antimony(III) in Aqueous Phase by Nano-Fe3O4 Modified High-Iron Red Mud: Study on Its Performance and Mechanism

Peng

Luo

et al. 2021

Water

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“…The production of sintering-free lightweight aggregates (SFLAs) (also known as cold-bonded lightweight aggregates) is widely used to recycle solid wastes by the cold-bonded pelletizing technique [ 17 ], where the choice of raw materials for SFLAs has been extended to various solid wastes in recent years, including waste water treatment sludge [ 18 ], ground granulated blast furnace slag [ 19 ], municipal solid waste incinerator fly ash [ 20 ], and water paper sludge ash [ 21 ]. The widespread research on the production SFLAs using solid wastes may be proposed as a feasible method on the exploration of producing SFLAs using RM, which has been rarely studied.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Physico-Chemical Performance Optimization of Sintering-Free Lightweight Aggregates with High Proportions of Red Mud

et al. 2021

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Sintering-free lightweight aggregates were prepared with high proportions of red mud and a binder material derived from whole solid wastes through rolling granulation at room temperature. The preparation process was optimized by changing the material matching and size parameters of the SFLAs. The physico-chemical performance, including the density, mechanical strength, water absorption, hydration products, heavy metal leaching, and microstructure were evaluated by jointly employing X-ray Fluorescence, X-ray Diffraction, and Inductively Coupled Plasma Optical Emission Spectrometry, Shadow Electron Microscope, etc. The results indicated that the red mud and waste-based binders were highly compatible in the granulation process, with up to 80% red mud being successfully added. The sintering-free lightweight aggregates products at the binder content of 30% and the size coverage of 10–16 mm exhibited a bulk density of 900–1000 kg·m−3, a 28 d cylinder compressive strength of 9.2–11.3 MPa, and water absorption of less than 10%. Owing to the formation of important hydration products, ettringite, the heavy metal leaching of the sintering-free lightweight aggregates was also proven to be environmentally acceptable. This work provides a promising pathway to prepare low-cost, high-strength, and green lightweight aggregates through the large-scale utilization of solid waste red mud.

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“…However, its high levels in water supply and soil can be toxic to humans, cause an undesirable taste in beverages and stain 2 porcelain (Myers et al, 2009;Ehrlich, Newman, & Kappler, 2015;Gerke, Little, & Maynard, 2016;Hao et al, 2015;Tobiason et al, 2016;Li et al, 2020). Evolving health research has revealed that its half-life in bones is about 8 to 9 years once it is absorbed by human cells (O'Neal et al, 2014;Li et al, 2020). Intellectual impairment and hyperactive behaviours in school-age kids exposed to manganese from drinking water has been documented (Li et al, 2020;Bouchard et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Manganese is known as an essential nutrient for human life and several enzymes use the redox properties of this element (Li et al, 2020;Mou et al, 2011). However, its high levels in water supply and soil can be toxic to humans, cause an undesirable taste in beverages and stain 2 porcelain (Myers et al, 2009;Ehrlich, Newman, & Kappler, 2015;Gerke, Little, & Maynard, 2016;Hao et al, 2015;Tobiason et al, 2016;Li et al, 2020). Evolving health research has revealed that its half-life in bones is about 8 to 9 years once it is absorbed by human cells (O'Neal et al, 2014;Li et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Exploring the effectiveness of in-situ sodium ferrate (VI) during the bench-scale of manganese removal from raw water collected from a South African WTP

Munyengabe

Zvinowanda

Masindi

2021

Preprint

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Manganese (Mn) is an essential element for human body and several enzymes rely on its redox properties. Its elevated concentrations in water can be toxic to humans, stain porcelains and can generate an undesirable taste in beverages. Several methods including adsorption, biologically active filtration oxidation and precipitation have been used to reduce it from water. Unfortunately, most of these methods have disadvantages of generating harmful by-products. Ferrate (VI) has been considered as a supplant to common oxidants during the treatment of drinking water. It has main advantages such as production of ferric ion, high oxidation potential, which may support coagulation, and the lack of significant halogenated by-product generation. However, this study aimed at exploring the effectiveness of in-situ liquid sodium ferrate (Na2FeO4) during the removal of Mn from raw water collected from Cullinan water treatment plant (CWTP) at the bench-scale. Na2FeO4 was produced using a wet oxidation method. The treatment of raw water collected from CWTP presented the removal percentage of Mn ranging between 82.70 and 99.20%. The pH of the drinking water sample raised from 7.25 to 10.97 after treatment. The treatability index (TI) was also studied. Only the TI of pH value was less than one. The TI results indicated high value of EC and authors would like to replace sodium by calcium in the ferrate product to reduce EC of the treated water and recommend the application of FeO42- ions for the treatment of raw water in a full-scale as it showed to be a promising a green oxidant.

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Mechanism study on manganese(II) removal from acid mine wastewater using red mud and its application to a lab-scale column

Cited by 50 publications

References 57 publications

Efficient Removal of Antimony(III) in Aqueous Phase by Nano-Fe3O4 Modified High-Iron Red Mud: Study on Its Performance and Mechanism

Efficient Removal of Antimony(III) in Aqueous Phase by Nano-Fe3O4 Modified High-Iron Red Mud: Study on Its Performance and Mechanism

Preparation and Physico-Chemical Performance Optimization of Sintering-Free Lightweight Aggregates with High Proportions of Red Mud

Exploring the effectiveness of in-situ sodium ferrate (VI) during the bench-scale of manganese removal from raw water collected from a South African WTP

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