Hierarchically porous BiOCl@NiCo2O4 nanoplates as low-cost and highly efficient catalysts for the discoloration of organic contaminants in aqueous media

2020 ◽  
Vol 44 (1) ◽  
pp. 258-264 ◽  
Author(s):  
Lihua Zhi ◽  
Youyuan Xu ◽  
Shengya Zhang ◽  
Dongcheng Hu ◽  
Jiacheng Liu
Keyword(s):  
Catalytic Activity ◽  
Water Samples ◽  
Organic Contaminants ◽  
Low Cost ◽  
Aqueous Media ◽  
Contaminated Water ◽  
Hierarchically Porous ◽  
Highly Efficient

BiOCl@NiCo2O4 exhibits remarkable catalytic activity and stability and can be used to deal with real contaminated water samples.

Highly Efficient and Low‐cost Clay‐based Adsorbent for Glyphosate Removal from Contaminated Water

2021 ◽  
Author(s):  
Farzana Nargis ◽  
Ann Duong ◽  
Erwin Rehl ◽  
Charles Bradshaw ◽  
Hossein Kazemian
Keyword(s):  
Low Cost ◽  
Contaminated Water ◽  
Highly Efficient

scholarly journals Removal of Cyanide-Contaminated Water by Vetiver Grasses

2015 ◽  
Vol 9 (13) ◽  
pp. 252 ◽  
Author(s):  
Piyada Wachirawongsakorn ◽  
Tongsai Jamnongkan ◽  
Mohd Talib Latif
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Sri Lanka ◽  
Removal Efficiency ◽  
Water Samples ◽  
Low Cost ◽  
Contaminated Water ◽  
Vetiver Grass ◽  
Vetiveria Zizanioides ◽  
Concentration Levels

<p>Vetiver grass and it usages have been widely investigated in many researches as the preferred plant species due to its known efficiency, low cost, the ease of availability and spread. This research aimed to use four different vetiver grass (<em>Vetiveria zizanioides</em>) ecotypes to remove cyanide (CN<sup>-</sup>)-contaminated water for improve its quality. Growth capability, tolerance and removal efficiency were evaluated. The results showed that the vetiver grass had a 100% survival rate for one month after planting. Songkhlar3 had the longest leaves, followed by Surat-Thani, Sri Lanka and Monto, respectively. Root lengths of all ecotypes showed no significant differences (p ≤ 0.05). All vetiver grass ecotypes could potentially purify CN<sup>-</sup>-contaminated water at lower concentrations of ≤ 35 mg CN<sup>-</sup>/L. The Monto ecotype had the highest CN<sup>-</sup> removal efficiency at all CN<sup>-</sup> concentration levels, showing 100% CN<sup>-</sup> removal from the 5-45 mg CN<sup>-</sup>/L contaminated water samples within 2-5 weeks growth. The tolerance of vetiver grass to CN<sup>-</sup> was a more important factor than growth rate when selecting a vetiver grass ecotype for CN<sup>-</sup> phytoremediation.</p>

Label-Free Fluorescent Detection of Hg2+ in Aqueous Media Based on N-Doped MoS2 Nanosheets

NANO ◽  
2018 ◽  
Vol 13 (05) ◽  
pp. 1850057 ◽  
Author(s):  
Jing Liu ◽  
Xiao Li ◽  
Xin Gong ◽  
Taiping Qing ◽  
Peng Zhang ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Lake Water ◽  
Water Samples ◽  
Low Cost ◽  
Aqueous Media ◽  
Fluorescent Detection ◽  
Label Free ◽  
Mos2 Nanosheets ◽  
Practical Applications ◽  
Dopant Atoms

The incorporation of dopant atoms alters the structure of MoS2, resulting in unique properties and practical applications. Herein, a facile and low-cost approach for producing N-doped molybdenum disulfide (N-MoS[Formula: see text] was carried out using melamine and MoS2 in a laboratory tube furnace at 400[Formula: see text]C for 2[Formula: see text]h. The N-MoS2 fluorescent probe showed sensitive response to Hg[Formula: see text] in a wide concentration range of 0.4–10[Formula: see text][Formula: see text]M with a low limit of 28[Formula: see text]nM. The practical applicability of detecting Hg[Formula: see text] in lake water samples may open a new way to evaluate Hg[Formula: see text] in wastewater.

Nano-structured hybrid molybdenum carbides/nitrides generated in situ for HER applications

2017 ◽  
Vol 5 (17) ◽  
pp. 7764-7768 ◽  
Author(s):  
Rajinder Kumar ◽  
Ritu Rai ◽  
Seema Gautam ◽  
Abir De Sarkar ◽  
Nidhi Tiwari ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Precious Metal ◽  
Molybdenum Carbide ◽  
Low Cost ◽  
Metal Free ◽  
Highly Efficient ◽  
Molybdenum Carbides ◽  
Supported Molybdenum Carbide

A highly efficient, low-cost (precious-metal-free), highly stable nanohybrid electrocatalyst containing carbon-supported molybdenum carbide and nitride nanoparticles of size ranging from 8 to 12 nm exhibit excellent HER catalytic activity.

Utilization of Jackfruit Peel as a Low-Cost adsorbent for the Removal of Methylene Blue Dye from Synthetically Polluted Water

2020 ◽  
Vol 16 ◽  
Author(s):  
Mohsina Ahmed ◽  
Abu Nasar
Keyword(s):  
Methylene Blue ◽  
Low Cost ◽  
Aqueous Media ◽  
Polluted Water ◽  
Blue Dye ◽  
Batch Adsorption ◽  
Contaminated Water ◽  
Abrupt Increase ◽  
Agriculture Waste ◽  
Pseudo Second Order

Background: Due to an abrupt increase in the contamination of freshwater systems by dye-containing wastewater, there is an urgent need to find robust and greener adsorbents for the elimination of dyes from the contaminated water. As the dyes not only change the appearance of water but are also a cause of many serious problems, which can be some time mutagenic and carcinogenic. Methods: This research paper is based on the use of adsorbent made from the peel of jackfruit (POJ). The adsorbent derived from agriculture waste was low cost and efficient for the elimination of methylene blue (MB) dye from aqueous media. Batch adsorption experiments were accompanied by varying the pH of the solution, contact time, POJ dosage, and initial MB concentration. Results: It was seen that adsorption of MB onto Jackfruit peel adsorbent follows pseudo-second-order (PSO) kinetics and Langmuir isotherm with maximum biosorption capacity (qm) of 232.55 mg/g. The thermodynamic study revealed that the adsorption was spontaneous, endothermic, and associated with the rise in entropy. Conclusion: In view of the low-cost and promising adsorption efficiency, the present investigation submits that that POJ is novel and economically feasible adsorbent for the removal of MB from aqueous solutions.

Magnetic cobalt nanoparticles embedded in hierarchically porous nitrogen-doped carbon frameworks for highly efficient and well-recyclable catalysis

2016 ◽  
Vol 4 (19) ◽  
pp. 7476-7482 ◽  
Author(s):  
Xingyue Li ◽  
Chunmei Zeng ◽  
Jing Jiang ◽  
Lunhong Ai
Keyword(s):  
Aqueous Solution ◽  
Catalytic Activity ◽  
Cobalt Nanoparticles ◽  
Hierarchically Porous ◽  
Nitrogen Doped ◽  
Highly Efficient ◽  
Carbon Framework ◽  
Nitrogen Doped Carbon

Hierarchically porous nitrogen-doped carbon framework confined cobalt nanoparticles exhibited remarkable catalytic activity and excellent durability for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) by NaBH4 in an aqueous solution.

Cu/Mn co-loaded hierarchically porous zeolite beta: a highly efficient synergetic catalyst for soot oxidation

2015 ◽  
Vol 3 (18) ◽  
pp. 9745-9753 ◽  
Author(s):  
Xiaoxia Zhou ◽  
Hangrong Chen ◽  
Guobin Zhang ◽  
Jin Wang ◽  
Zhiguo Xie ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalytic Oxidation ◽  
Hydrothermal Treatment ◽  
Water Resistance ◽  
Soot Oxidation ◽  
Zeolite Beta ◽  
Hierarchically Porous ◽  
Highly Efficient ◽  
Mn Species ◽  
Surfactant Assisted

A hierarchically porous zeolite beta as a carrier was made by surfactant-assisted hydrothermal treatment and subsequent alkali etching, and the Cu/Mn species were co-loaded into the carrier. The obtained catalyst exhibits excellent catalytic activity and water-resistance for soot catalytic oxidation.

Reduction of Escherichia coli bacteria from contaminated water by combining hydrogen peroxide, ozone and ultraviolet light

2013 ◽  
Vol 13 (3) ◽  
pp. 782-789 ◽  
Author(s):  
Bassam Tawabini ◽  
Amjad Khalil ◽  
Basim Abussaud
Keyword(s):  
Escherichia Coli ◽  
Hydrogen Peroxide ◽  
Ultraviolet Light ◽  
Water Samples ◽  
Organic Contaminants ◽  
Inactivation Rate ◽  
Contaminated Water ◽  
Butyl Ether ◽  
Tertiary Butyl ◽  
Escherichia Coli Bacteria

This study demonstrates the reduction of Escherichia coli bacteria from contaminated water when the water is treated with advanced oxidation processes utilising the following combinations: hydrogen peroxide (H2O2) and ozone (O3), ultraviolet light (UV) and hydrogen peroxide (H2O2), and ultraviolet light (UV) and ozone (O3). Approximately 1 × 108cell/mL of E. coli were spiked into water samples contaminated with 500 ppb of methyl tertiary butyl ether (MTBE) and benzene. Water samples were then treated in a bench-scale photoreactor using 15 W low pressure (LP) and 150 W medium pressure (MP) UV lamps. Hydrogen peroxide at 20, 50 and 100 ppm and ozone at 1, 2 and 5 ppm were used along with the UV irradiation to generate the hydroxyl radicals (.OH) needed to degrade organic contaminants such as MTBE and benzene and most likely destroy bacteria. The results of the study showed that, under the study conditions, no effect of benzene or MTBE was observed on the inactivation rate of the bacteria. Moreover, results showed that the combined effect of the LP 15 W UV lamp with 2 ppm O3 or with 50 ppm H2O2 showed the highest inactivation rate of bacteria within 5 min. The H2O2/O3 process showed high disinfection capability at high dosages of peroxide (50 ppm) and O3 (2 and 5 ppm).

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