Functional biochar fabricated from waste red mud and corn straw in China for acidic dye wastewater treatment

Gao, Yujie; Jia, Zhang; Chen, Chao-Wen; Du, Yue; Teng, Guopeng; Zhang, Wu

doi:10.1016/j.jclepro.2021.128887

Cited by 44 publications

(11 citation statements)

References 36 publications

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“…In recent years, with the rapid development of the modern textile dyeing industry, reactive dye wastewater pollution has become a major source of water pollution, posing a great threat to human health and the ecological environment. − Meanwhile, in the traditional reactive dyeing process, large amounts of salt and alkali need to be added to reduce the electrostatic repulsion of dyestuffs on cotton fibers. − The discharge of salt-containing dye wastewater (e.g., brine) reduces water quality, resulting in water that cannot be used directly for drinking water (via desalination) and industrial applications. − Therefore, the effective removal of reactive dyes from dye wastewater is essential.…”

Section: Introductionmentioning

confidence: 99%

In Situ Generated UiO-66/Cotton Fabric Easily Recyclable for Reactive Dye Adsorption

Zhang

Liu

et al. 2022

Langmuir

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In view of the environmental pollution caused by the widespread use of reactive dyes in the printing and dyeing industry, the modified cotton fabric was loaded with the extremely stable metal−organic frame (MOF) material UiO-66 for removing reactive dyes from colored wastewater. UiO-66/cotton fabric was prepared by in situ synthesis, and its surface morphology and structure were analyzed by XRD, SEM, BET, and XPS. The adsorption performance of UiO-66/cotton fabric on reactive dyes was investigated by adsorbent dosage, adsorption time and temperature, dye concentration, pH, and so on. The results indicated that the adsorption equilibrium time of UiO-66/cotton fabric on reactive orange 16 was 120 min, and the removal rate was about 98%. The adsorption process belongs to simple molecular layer chemisorption and can be regarded as a spontaneous heat absorption reaction, which was consistent with the proposed secondary kinetic model and Langmuir isothermal adsorption model. In addition, the reactive dyes with a higher molecular weight of each sulfonic acid group are more hydrophobic, and the dyes are more likely to aggregate and deposit on the adsorbent surface by electrostatic attraction, hydrogen bonding, and π−π accumulation. Therefore, this work provides a potential UiO-66/cotton fabric application for the effective adsorption of reactive dyes in textile wastewater.

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Section: Introductionmentioning

confidence: 99%

In Situ Generated UiO-66/Cotton Fabric Easily Recyclable for Reactive Dye Adsorption

Zhang

Liu

et al. 2022

Langmuir

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“…M. Vijayalakshmi et al 3 used granite powder as substitute material for fine/natural aggregate in concrete production, and the replacement rate was up to 15%. Gao et al 6 used red mud and corn straw to fabricate functional biochar composites via pyrolysis, which showed excellent performance in treating acid dye wastewater. Unfortunately, compared with the large amount of granite scrap and red mud waste discharged every year, these methods consume relatively small quantity waste.…”

Section: Introductionmentioning

confidence: 99%

“…used granite powder as substitute material for fine/natural aggregate in concrete production, and the replacement rate was up to 15%. Gao et al 6 . used red mud and corn straw to fabricate functional biochar composites via pyrolysis, which showed excellent performance in treating acid dye wastewater.…”

Section: Introductionmentioning

confidence: 99%

Waste‐bearing foamed ceramic from granite scrap and red mud

Dong

Jiang

Zhang

et al. 2022

Int J Applied Ceramic Tech

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Using granite scrap and red mud as raw materials, SiC as foaming agent, powder sintering method was used to prepare closed‐pore foamed ceramic. The effects of the ratio of red mud and granite scrap, foaming agent content, sintering temperature and holding time on the crystalline phase, pore structure, and performance of foamed ceramic were systematically studied. The results showed that, when the content of red mud was 10 wt%, together with 1.0 wt% SiC addition, the heating rate was 5°C/min, the foamed ceramic sintered at 1130°C for 30 min exhibited optimal properties, including bulk density of 483.11 kg/m3, porosity of 77.27%, compressive strength of 1.62 MPa and water absorption of .49%. Based on these properties, it possessed broad potential application prospects in the fields of sound and thermal insulation, lightweight construction materials. In this study, the utilization ratio of industrial solid waste was 100%, realized the comprehensive utilization of granite scrap and red mud, and provided a new idea to realize their low‐cost utilization by preparing foamed ceramic with associated economic and environmental benefits.

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“…However, with the shortage of wood resources in the world, researchers are increasingly seeking other environment-friendly, renewable, and low-cost alternative resources. Biochar prepared from low-density resources, such as reeds, straws, fruit shells, and sugarcane, by pyrolysis under anaerobic or anoxic conditions at certain temperatures (<700 °C) have been found to have well-developed pore structures and high specific surface areas [ 5 , 6 , 7 , 8 ]. Among these, activated reed biochar is mainly composed of aromatic hydrocarbons and elemental carbon (C) or C with a graphite structure.…”

Section: Introductionmentioning

confidence: 99%

Effects of Reed Biochar Mass Fraction on the Properties of Polypropylene/Reed Char Composites

Zou

et al. 2022

Polymers

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Reed charcoal/polypropylene (RC/PP) composites were prepared by melt-blending and molding processes. The effects of RC addition (by mass fraction) on its mechanical properties were investigated and the mechanism characterized. The results showed that RC and PP were physically bonded and formed a mechanical interlocking matrix. The water absorption rate of these composites was <1% at 168 h. As the RC mass fraction increased, the tensile modulus, crystallinity, and energy storage modulus of the composites increased and then decreased, with the tensile modulus reaching a maximum of 679.4 MPa. The thermal decomposition rate peak and starting melt temperature increased by 14.8 and 2.5 °C, respectively, compared to pure PP, and the energy storage modulus reached a maximum of 3752.8 MPa at 40 wt% RC. The addition of RC in appropriate amounts improved the rigidity and thermal stability of these composites.

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Functional biochar fabricated from waste red mud and corn straw in China for acidic dye wastewater treatment

Cited by 44 publications

References 36 publications

In Situ Generated UiO-66/Cotton Fabric Easily Recyclable for Reactive Dye Adsorption

In Situ Generated UiO-66/Cotton Fabric Easily Recyclable for Reactive Dye Adsorption

Waste‐bearing foamed ceramic from granite scrap and red mud

Effects of Reed Biochar Mass Fraction on the Properties of Polypropylene/Reed Char Composites

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