Treatment of shale gas flowback water by adsorption on carbon- nanotube-nested diatomite adsorbent

Wang, Bing; Xiong, Mingyang; Shi, Bin; Li, Zhuoying; Zhang, Huan

doi:10.1016/j.jwpe.2021.102074

Cited by 13 publications

(5 citation statements)

References 45 publications

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“…The post-modified DE exhibited a higher adsorption capacity (q m = 44.0 mg/g) than bare DE (q m = 0.9 mg/g) for Congo red at pH = 7 [14]. Wang et al improved the multilevel pore structure of DE by loading carbon nanotubes onto the surface of diatomite, and enhanced the adsorption capacity of organic contaminants in shale gas flow back water [15]. However, as the used powder adsorbent, raw and functionalized DE has a serious disadvantage of separation from water environment.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Chitosan-Diatomite/Calcium Alginate Composite Hydrogel Beads for the Adsorption of Congo Red Dye

Zhao

Shen

2023

Water

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In this paper, novel eco-friendly cross-linked chitosan-diatomite/calcium alginate (CS-DE@CA) composite hydrogel beads were successfully prepared for water purification. The obtained sorbents were characterized and studied by using Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA), which confirmed the successful modification and encapsulation of diatomite into hydrogel beads. The adsorption performance of composite beads for Congo red in an aqueous solution was studied by ultraviolet-visible spectrophotometry. In particular, the CS-DE@CA exhibited higher removal efficiencies (~89.9%) than the removal efficiencies (~83.6%) of the DE@CA (in the temperature = 20 °C, 100 mL, 50 mg/L, and pH = 7). It was also found that adsorption capacity of Congo red increased from 23.28 mg/g to 38.84 mg/g when the starting concentration increased from 25 mg/L to 75 mg/L. The adsorption process was dominated by chemisorption, and its maximum adsorption capacity for Congo red was calculated to be 48.42 mg/g by Langmuir model. Additionally, the as-prepared sorbent maintained an exceptional adsorption capacity after four adsorption–desorption cycles. Overall, this study also provides new guidance and avenues for further fabrication and development of eco-friendly purifier for the removal of Congo red in contaminated water.

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Section: Introductionmentioning

confidence: 99%

Preparation of Chitosan-Diatomite/Calcium Alginate Composite Hydrogel Beads for the Adsorption of Congo Red Dye

Zhao

Shen

2023

Water

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“…18 The treatment methods for SG-FFF to remove dissolved salts include coagulation, ultrafiltration, nanofiltration, 19 membrane distillation, 20 vapor compression evaporation (MVR), 15 reverse osmosis (RO) membrane concentration, 21 ozone pre-oxidation and gravity driven membrane filtration. 22,23 The treatment methods for SG-FFF to remove organic matter include thermally activated persulfate, 1,7,24 an anoxic/oxic membrane bioreactor (A/O-MBR) mediated by nano-iron, 25 zero-valent iron and persulfate synergistic ozone, 26 microbial fuel cells, 27,28 electrocoagulation combined with ozone, 29,30 electrofenton, 31,32 carbon nanotube embedded diatomite adsorbent adsorption, 33 aerosol adsorption, 34 ozone-coupled activated carbon adsorption and aerobic, 35 the aerobic granular sludge method, 36 the ozone-coupled moving bed biofilm method 37 and pre-oxidation coupled with the biological method. 38 The combined processes to treat SG-FFF for discharge include coagulation, precipitation, adsorption, ultrafiltration and RO, 39 ozone, ultrafiltration and RO, 40 and gravity driven membrane filtration combined with granular activated carbon (GAC) adsorption, and solar aeration.…”

Section: Introductionmentioning

confidence: 99%

Shale gas fracturing flowback water deep treatment engineering – a case study

yang

Huang

Yang

2023

Environ. Sci.: Water Res. Technol.

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“…Different technologies that have been used to remove these contaminants from water include distillation, electrolysis, − photodegradation, , adsorption, − and filtration membrane − technology. The filtration membrane technology stands out as the best since it requires minimum and flexible operational energy, can attain high removal and separation efficiency, has high and stable filtration flux, requires low filtration pressure, has high-quality permeability, is cost effective, and is also capable of operating continuously. ,− However, these filtration membranes face the unavoidable occurrence of fouling that arises from deposits of microbes, suspended solids, and organic materials on the surface of the membrane for the duration of selective water permeation .…”

Section: Introductionmentioning

confidence: 99%

Current Status and Advancement of Nanomaterials within Polymeric Membranes for Water Purification

Noah

2023

ACS Appl. Nano Mater.

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The contamination of water resources is a significant environmental challenge. The creation of innovative technologies to address this challenge is of paramount significance. Nanomaterials within polymeric membranes have surfaced as a hopeful technology within the realm of water purification, offering solutions to crucial issues concerning the elimination of pollutants and pathogens from water supplies. The exceptional properties of nanomaterials within polymeric membranes, including their high surface area, tunable pore sizes, and selective permeability, have enabled significant progress in the effective removal of various contaminants from water. This is due to the integration of nanoscale materials, such as metal nanoparticles, nanofibers, graphene, and graphene oxide, which has further enhanced the membrane performance by introducing enhanced mechanical strength, improved separation efficiency, and increased adsorption capacities. Recent research has focused on tailoring nanomaterials within polymeric membranes to target specific contaminants, such as viruses, bacteria, heavy metals, organic pollutants, and microplastics. Functionalization techniques, such as surface modification and incorporation of specific functional groups, have been employed to enhance the adsorption and separation capabilities of these membranes. Moreover, innovative fabrication methods, including layer-by-layer assembly, electrospinning, and template-assisted techniques, have been explored to achieve precise control over membrane properties and morphology. This review provides an overview of the current status and advancements in the utilization of nanomaterials within polymeric membranes for water purification applications.

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Treatment of shale gas flowback water by adsorption on carbon- nanotube-nested diatomite adsorbent

Cited by 13 publications

References 45 publications

Preparation of Chitosan-Diatomite/Calcium Alginate Composite Hydrogel Beads for the Adsorption of Congo Red Dye

Preparation of Chitosan-Diatomite/Calcium Alginate Composite Hydrogel Beads for the Adsorption of Congo Red Dye

Shale gas fracturing flowback water deep treatment engineering – a case study

Current Status and Advancement of Nanomaterials within Polymeric Membranes for Water Purification

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