Polycyclic Aromatic Hydrocarbon Sorption by Functionalized Humic Acids Immobilized in Micro- and Nano-Zeolites

Polycyclic aromatic hydrocarbons (PAHs) are hazardous compounds originating from anthropogenic activity. Due to their carcinogenic properties for humans, several technologies have been developed for PAH removal. Sorption with natural and organic materials is currently one of the most studied due to its low cost and its environmentally friendly nature. In this work, a hybrid sorbent involving functionalized humic acids (HAs) and nano-zeolite is proposed to entrap PAHs. The use of functionalized HAs immobilized in a porous support is designed to address the instability of HAs in solution, which has been already reported. HA functionalization was carried out to increase the non-polarity of HAs and aliphatic group formation. The HAs were functionalized by esterification/etherification with alkyl halides, and their chemical changes were verified by FTIR and NMR. The sorption isotherms of the functionalized HAs in micro- and nano-zeolites were used to assess the performance of the nano-zeolites in adsorbing these HAs. The hybrid support allowed the removal of anthracene and pyrene at percentages higher than 90%; fluoranthene, of angular molecular structure, was adsorbed at 85%. PAHs are ubiquitous in the environment, and a stable sorption of them in solid matrices will allow their removal from the environment through effective and environmentally friendly methods.

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Effect of soil pollution with polycyclic aromatic hydrocarbons on the properties of humic acids

Journal of Soils and Sediments ◽

10.1007/s11368-014-0873-9 ◽

2014 ◽

Vol 14 (6) ◽

pp. 1169-1178 ◽

Cited By ~ 15

Author(s):

Magdalena Banach-Szott ◽

Bożena Debska ◽

Ewa Rosa

Keyword(s):

Polycyclic Aromatic Hydrocarbons ◽

Soil Pollution ◽

Humic Acids ◽

Aromatic Hydrocarbons ◽

Polycyclic Aromatic

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Application and Development of an Environmentally Friendly Blast Hole Plug for Underground Coal Mines

Shock and Vibration ◽

10.1155/2018/6964386 ◽

2018 ◽

Vol 2018 ◽

pp. 1-12

Author(s):

Donghui Yang ◽

Yixin Zhao ◽

Zhangxuan Ning ◽

Zhaoheng Lv ◽

Huafeng Luo

Keyword(s):

Split Hopkinson Pressure Bar ◽

Low Cost ◽

Blast Hole ◽

Environmentally Friendly ◽

Test System ◽

Industrial Test ◽

Labor Intensity ◽

Rock Blasting ◽

Hopkinson Pressure Bar ◽

The Impact

Drilling and blasting technology is one of the main methods for pressure relief in deep mining. The traditional method for blasting hole blockage with clay stemming has many problems, which include a large volume of transportation, excess loading time, and high labor intensity. An environmentally friendly blast hole plug was designed and developed. This method is cheap, closely blocks the hole, is quickly loaded, and is convenient for transportation. The impact test on the plug was carried out using an improved split Hopkinson pressure bar test system, and the industrial test was carried out in underground tunnel of coal mine. The tests results showed that, compared with clay stemming, the new method proposed in this paper could prolong the action time of the detonation gas, prevent premature detonation gas emissions, reduce the unit consumption of explosives, improve the utilization ratio, reduce the labor intensity of workers, and improve the effect of rock blasting with low cost of rock breaking.

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Removal of some polycyclic aromatic hydrocarbons from petrochemical wastewater using low-cost adsorbents of natural origin

Bioresource Technology ◽

10.1016/j.biortech.2007.08.041 ◽

2008 ◽

Vol 99 (10) ◽

pp. 4515-4519 ◽

Cited By ~ 135

Author(s):

Rudy Crisafully ◽

Maria Aparecida L. Milhome ◽

Rivelino M. Cavalcante ◽

Edilberto R. Silveira ◽

Denis De Keukeleire ◽

...

Keyword(s):

Polycyclic Aromatic Hydrocarbons ◽

Aromatic Hydrocarbons ◽

Low Cost ◽

Petrochemical Wastewater ◽

Natural Origin ◽

Polycyclic Aromatic

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LED Light Sources in Organic Synthesis: An Entry to A Novel Approach

Letters in Organic Chemistry ◽

10.2174/1570178618666210916164132 ◽

2021 ◽

Vol 18 ◽

Author(s):

Aparna Das

Keyword(s):

Organic Compounds ◽

Organic Synthesis ◽

Photochemical Reaction ◽

Low Cost ◽

Environmentally Friendly ◽

Photochemical Reactions ◽

Light Sources ◽

Blue Led ◽

Oxidation Reduction ◽

Novel Approach

: In recent years, photocatalytic technology has shown great potential as a low-cost, environmentally friendly, and sustainable technology. Compared to other light sources in photochemical reaction, LEDs have advantages in terms of efficiency, power, compatibility, and environmentally-friendly nature. This review highlights the most recent advances in LED-induced photochemical reactions. The effect of white and blue LEDs in reactions such as oxidation, reduction, cycloaddition, isomerization, and sensitization is discussed in detail. No other reviews have been published on the importance of white and blue LED sources in the photocatalysis of organic compounds. Considering all the facts, this review is highly significant and timely.

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