Application of Biochar, Adsorbent and Nanomaterials in Wastewater Treatment

Wang, Tingting

doi:10.3390/w15071320

Cited by 4 publications

(2 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…11 These substances have unique characteristics that make them beneficial for treating wastewater. 12,13 Graphene and carbon nanotubes are two main examples of nanoparticles containing a high surface area-to-volume ratio. These substances are easily eliminated from water for disposal and have a significant capacity for adsorbing contaminants.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Photocatalytic Degradation of Methylene Blue with Graphene Oxide-Encapsulated g-C₃N₄/ZnO Ternary Composites

Shakoor,

Jilani

et al. 2024

ACS Omega

View full text Add to dashboard Cite

Methylene blue (MB) is a toxic contaminant present in wastewater. Here, we prepared various composites of graphene oxide (GO) with graphitic carbon nitride (g-C 3 N 4 ) and zinc oxide (ZnO) for the degradation of MB. In comparison to ZnO (22.9%) and g-C 3 N 4 /ZnO (76.0%), the ternary composites of GO/g-C 3 N 4 / ZnO showed 90% photocatalytic degradation of MB under a light source after 60 min. The experimental setup and parameters were varied to examine the process and effectiveness of MB degradation. Based on the results of the experiments, a proposed photocatalytic degradation process that explains the roles of GO, ZnO, and g-C 3 N 4 in improving the photocatalytic efficacy of newly prepared GO/g-C 3 N 4 /ZnO was explored. Notably, the g-C 3 N 4 /ZnO nanocomposite's surface was uniformly covered with ZnO nanorods. The images of the samples clearly demonstrated the porous nature of GO/g-C 3 N 4 /ZnO photocatalysts, and even after being mixed with GO, the g-C 3 N 4 /ZnO composite retained the layered structure of the original material. The catalyst's porous structure plausibly enhanced the degradation of the contaminants. The high-clarity production of g-C 3 N 4 and the effectiveness of the synthesis protocol were later validated by the absence of any trace contamination in the energy-dispersive X-ray spectroscopy (EDS) results. The composition of the ZnO elements and their spectra were revealed by the EDS results of the prepared ZnO nanorods, g-C 3 N 4 /ZnO, and GO/g-C 3 N 4/ ZnO. The outcomes indicated that the nanocomposites were highly uncontaminated and contained all necessary elements to facilitate the transformative process. The results of this experiment could be applied at a large scale, thus proving the effectiveness of photocatalysts for the removal of dyes.

show abstract

Section: Introductionmentioning

confidence: 99%

Enhancing the Photocatalytic Degradation of Methylene Blue with Graphene Oxide-Encapsulated g-C₃N₄/ZnO Ternary Composites

Shakoor,

Jilani

et al. 2024

ACS Omega

View full text Add to dashboard Cite

show abstract

“…The core of photocatalytic technology is photocatalytic materials, most of which are semiconductor materials. The semiconductor photocatalyst is simple and efficient to degrade pollutants, which can completely mineralize and remove pollutants without secondary pollution, making it a research hotspot of current sewage treatment technology [12].…”

Section: Introductionmentioning

confidence: 99%

Application of ZnO/WO3 Composite Nanofiber Photocatalysts in Textile Wastewater Treatment

Yan

Chen

2023

Separations

View full text Add to dashboard Cite

Semiconductor photocatalysis technology is an environmentally friendly and efficient emerging technology. This method can use sunlight as a driving force to quickly decompose organic pollutants in water bodies. Zinc oxide (ZnO) and tungsten oxide (WO3) photocatalysts can absorb sunlight and participate in photocatalytic degradation reactions due to their relatively narrow band gap. Highly photosensitive WO3 nanofibers and ZnO/WO3 composite nanofibers were fabricated via the electrospinning method. When 100 mg/L of rhodamine B (Rh B) solution was used as the degradation substrate, the degradation efficiencies of WO3 and ZnO/WO3 for Rh B dye were 70% and 90%, respectively, after a photocatalytic reaction of 120 min. The surface morphology, crystal structure, and optical properties of ZnO/WO3 composite nanofibers and WO3 nanofibers were characterized by SEM, XRD, XPS, and UV-vis absorption spectra, and the experimental results were analyzed and explained using different mechanisms. The results show that ZnO/WO3 composite nanofibers have better UV-visible light absorption performance, and the sample has a higher UV-visible light utilization rate. This was mainly due to the fact that a P-N heterojunction was formed in the semiconductor composite, and the electron–hole pair could realize rapid separation under the drive of a built-in electric field force, which promoted the migration of carrier. Therefore, the photocatalytic activity of the ZnO/WO3 catalyst was significantly higher than that of the WO3 catalyst, which promoted rapid improvement of the photocatalytic degradation efficiency of the Rh B dye.

show abstract

Exploring acid mine drainage treatment through adsorption: a bibliometric analysis

Dube,

Phiri,

Kuvarega

et al. 2024

Environ Sci Pollut Res

View full text Add to dashboard Cite

Discharge of acidic wastewater from mining activities (acid mine drainage (AMD)) is a major global environmental and public health issue. Although several approaches, including chemical precipitation and membrane technology, have been developed to treat AMD, adsorption has emerged as the most promising technology due to its cost-effectiveness and efficacy. Despite the wide adoption of adsorption in treating AMD, the evolution of research in this area remains poorly understood. To address this gap, a bibliometric analysis of the most recent literature involving the application of adsorption in AMD remediation was conducted by merging datasets of articles from Scopus (1127) and the Web of Science Core Collection (1422), over the past decade (2013–2022). This analysis revealed a yearly increase of 11% in research publications, primarily contributed by China, the United States, and South Africa. Keyword analysis revealed that natural schwertmannites and their transformations, activated carbon, zeolites, and clay minerals, are the most extensively employed adsorbents for the removal of common metals (arsenic, chromium, iron, manganese, among others). The findings underscore the need for future focuses on recovering rare earth elements, using nanoparticles and modified materials, pursuing low-cost, sustainable solutions, integrating hybrid technologies, pilot-scale studies, exploring circular economic applications of AMD sludges, and inter-continental collaborations. These insights hold significant future implications, serving as a valuable reference to stakeholders in the mining industry.

show abstract

Application of Biochar, Adsorbent and Nanomaterials in Wastewater Treatment

Abstract: With rapid industrial and economic development, the problem of water pollution poses a great threat to the environment and human health [...]

Cited by 4 publications

References 13 publications

Enhancing the Photocatalytic Degradation of Methylene Blue with Graphene Oxide-Encapsulated g-C₃N₄/ZnO Ternary Composites

Enhancing the Photocatalytic Degradation of Methylene Blue with Graphene Oxide-Encapsulated g-C₃N₄/ZnO Ternary Composites

Application of ZnO/WO3 Composite Nanofiber Photocatalysts in Textile Wastewater Treatment

Exploring acid mine drainage treatment through adsorption: a bibliometric analysis

Contact Info

Product

Resources

About

Application of Biochar, Adsorbent and Nanomaterials in Wastewater Treatment

Abstract: With rapid industrial and economic development, the problem of water pollution poses a great threat to the environment and human health [...]

Cited by 4 publications

References 13 publications

Enhancing the Photocatalytic Degradation of Methylene Blue with Graphene Oxide-Encapsulated g-C3N4/ZnO Ternary Composites

Enhancing the Photocatalytic Degradation of Methylene Blue with Graphene Oxide-Encapsulated g-C3N4/ZnO Ternary Composites

Application of ZnO/WO3 Composite Nanofiber Photocatalysts in Textile Wastewater Treatment

Exploring acid mine drainage treatment through adsorption: a bibliometric analysis

Contact Info

Product

Resources

About

Enhancing the Photocatalytic Degradation of Methylene Blue with Graphene Oxide-Encapsulated g-C₃N₄/ZnO Ternary Composites

Enhancing the Photocatalytic Degradation of Methylene Blue with Graphene Oxide-Encapsulated g-C₃N₄/ZnO Ternary Composites