As-Prepared Carbon Nanotubes for Water Purification: Pollutant Removal and Magnetic Separation

The removal of monoaromatic (benzene (B) and toluene (T)) from aqueous solution by multi walled, single walled, and hybrid carbon nanotubes (MWCNTs, SWCNTs, and HCNTs) was evaluated for a nanomaterial dose of 1 g/l, concentration of 10-100 mg/l, and pH 7. The equilibrium amount removed by SWCNTs (B: 9.98 mg/g and T: 9.96 mg/g) was higher than for MWCNTs and HCNTs. Toluene has a higher adsorption tendency on CNTs than benzene, which is related to the increasing water solubility and the decreasing molecular weight of the compounds. The SWCNTs performed better for B and T sorption than the MWCNTs and HCNTs. Isotherms study based on isofit program, indicate that the Generalized Langmuir-Freundlich (GLF) isotherm expression provides the best fit for benzene sorption and Brunauer-Emmett-Teller (BET) isotherm is the best fit for toluene adsorption by SWCNT. SWCNTs are efficient B and T adsorbents and possess good potential applications to water and wastewater treatment and maintain water of high quality that could be used for cleaning up environmental pollution.

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Amorphous carbon nanotubes as potent sorbents for removal of a phenolic derivative compound and arsenic: theoretical support of experimental findings

RSC Advances ◽

10.1039/c5ra23382h ◽

2016 ◽

Vol 6 (11) ◽

pp. 8913-8922 ◽

Cited By ~ 8

Author(s):

P. Bhowmick ◽

D. Banerjee ◽

S. Santra ◽

D. Sen ◽

B. Das ◽

...

Keyword(s):

Carbon Nanotubes ◽

Amorphous Carbon ◽

Water Purification ◽

Theoretical Support ◽

Phenolic Derivative ◽

Experimental Findings

Amorphous carbon nanotubes can be uses as potential material for water purification.

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Design of Portable Hybrid Constructed Wetland Reactor for the Treatment of Wastewater

International Journal for Research in Applied Science and Engineering Technology ◽

10.22214/ijraset.2021.34937 ◽

2021 ◽

Vol 9 (VI) ◽

pp. 53-58

Author(s):

Swapnil Hiwrale

Keyword(s):

Wastewater Treatment ◽

Constructed Wetland ◽

Water Purification ◽

Water Solution ◽

Water Shortage ◽

Pilot Scale ◽

General Term ◽

Pollutant Removal ◽

Treated Wastewater ◽

The Way

The idea of the project is predicated on the methodology of preventing the wastewater and the way to form the water pure by using various techniques to form water purification. Nowadays the matter of water shortage increases especially we face the water problem in summer seasons only. we are designing and portable hybrid water solution for the treatment of wastewater during this study, pilot-scale hybrid constructed wetlands (CWs) and multistage horizontal subsurface flow CWs (HF CWs) are studied and compared for the treatment of raw urban wastewater. Additionally, the sand became clogged, while the mulch failed to. The effect of water height on the average pollutant removal wasn't determined but HF10 performed better regarding compliance with legal regulations. With this idea of the project, we could see how we will purify the wastewater and the way much we can see the index of the water purification. A survey of the magnitude of water-related stress at villages on the subject of a college campus or Maharashtra villages affects rural life. Especially in the summer seasons. Problems of availability, accessibility, and quality of Water In Maharashtra 17 districts are that which is laid low with water crises. Maharashtra had approved over R.s 7000 corer to complete the potable project in the scarcity hit area. In India 4% of water resources available from 18% water available in word. Wetland technology can provide cheap and effective wastewater treatment in both temperature and tropical climates and is suitable for adoption in both industrialized likewise as in developing nations this method is utilized for the removal of a range of pollutants and a broad verity of wastewater worldwide. it's one of the simplest methods to treated wastewater at source premises, effectively and economically. This general term accustomed describe different degrees of treatment, so as of skyrocketing treatment levels are preliminary, primary, secondary, and tertiary or advance wastewater treatment. Disinfection to get rid of pathogens sometimes follows the last treatment steps. After treatment of wastewater from constructed wetland reactor, 90 to 95% BOD is going to be satisfied than 85 to 90% Turbidity is going to be removed, and 70 to 80% Nutrient are going to be removed by phytoremediation method. Constructed wetland technology has played a vital role in achieving the changes in wastewater.

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Synergistic Action of Plants and Microorganism in Integrated Floating Bed on Eutrophic Brackish Water Purification in Coastal Estuary Areas

Frontiers in Marine Science ◽

10.3389/fmars.2021.619087 ◽

2021 ◽

Vol 8 ◽

Author(s):

Ming Liu ◽

Youyuan Chen ◽

Yadong Wu ◽

Jiameng Guo ◽

Ping Sun ◽

...

Keyword(s):

Salt Tolerance ◽

Water Purification ◽

Brackish Water ◽

Volcanic Rocks ◽

Ammonia Nitrogen ◽

Pollutant Removal ◽

Water Bodies ◽

Poor Growth ◽

Coastal Estuary ◽

Pollutants Removal

Eutrophic water bodies in coastal estuary areas usually show saline-alkaline characteristics influenced by tides. The purification performance of traditional planted floating beds in this water body is limited because of the poor growth of plants. A novel integrated floating bed with plants (Iris pseudoacorus), fillers (volcanic rocks and zeolites), and microbes named PFM was established, and the pollutant removal performance was studied. Results showed that the average ammonia nitrogen (NH4+-N), total nitrogen (TN), total phosphorus (TP), and permanganate index (CODMn) removal efficiencies of PFM were higher with the value of 81.9, 78.5, 53.7, and 72.4%, respectively, when compared with the other floating beds containing plants (P), fillers (F), microbes (M), and plants and fillers (PF) in this study. Therein, the most of NH4+-N (30.1%), TN (27.9%), TP (22.5%), and CODMn (43.6%) were removed by microbes, higher than those removed by plants and fillers. Analysis of the microbial community revealed that the establishment of PFM led to a higher microbial richness than M, and Acinetobacter, as the main microbes with the function of salt tolerance and denitrification, were dominated in PFM with a relative abundance of 6.8%. It was inferred that the plants and fillers might enrich more salt-tolerance microbes for pollutants removal, and microbes favored the growth of plants via degradation of macromolecular substrates. Synergistic actions in the process of eutrophic brackish water purification were established. This study provided an idea for the application of integrated floating bed in eutrophic and brackish water bodies purification in coastal estuary areas.

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