EXTRACTION OF HUMIC ACID AND BLACK CARBON AND THEIR ADSORPTION BEHAVIORS FOR PHENANTHRENE AND PYRENE

DENG Yun; WANG Fei

doi:10.13205/j.hjgc.202108011

Volume 39 Issue 8

Jan. 2022

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DENG Yun, WANG Fei. EXTRACTION OF HUMIC ACID AND BLACK CARBON AND THEIR ADSORPTION BEHAVIORS FOR PHENANTHRENE AND PYRENE[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(8): 88-92,107. doi: 10.13205/j.hjgc.202108011

Citation:

DENG Yun, WANG Fei. EXTRACTION OF HUMIC ACID AND BLACK CARBON AND THEIR ADSORPTION BEHAVIORS FOR PHENANTHRENE AND PYRENE[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(8): 88-92,107. doi: 10.13205/j.hjgc.202108011

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EXTRACTION OF HUMIC ACID AND BLACK CARBON AND THEIR ADSORPTION BEHAVIORS FOR PHENANTHRENE AND PYRENE

doi: 10.13205/j.hjgc.202108011

DENG Yun,
WANG Fei^,

School of Environment, Jinan University, Guangzhou 510000, China

Received Date: 2020-09-27
Available Online: 2022-01-18

Abstract

Abstract

In this study, humic acid and black carbon were firstly extracted from river sediments, then characterized and analyzed by element analyzer, total organic carbon meter, scanning electron microscope and Zeta potential meter. The distribution behaviors of phenanthrene and pyrene, representative substances of polycyclic aromatic hydrocarbons (PAHs) on humic acid and black carbon were studied, and their distribution coefficients were determined, as well as the influence of Ca²⁺ concentration on the adsorption of phenanthrene and pyrene were investigated. The results showed that the main elemental composition of humic acid and black carbon extracted from river sediments were carbon and oxygen, both of which contained relatively rich aromatic hydrocarbon components; aquatic plants were the main contributors of the source of humic acid and black carbon; humic acid had a foamed floc structure, and black carbon had a microporous structure; the negative charge on the surface of black carbon particles was relatively less than that of humic acid, so the repulsive force between the black carbon and pollutants was weaker. The above characterization results correspondingly provided theoretical basis for the adsorption capacity of black carbon higher than that of humic acid. The logarithmic value (lg K_d) of the partition coefficient of phenanthrene and pyrene on humic acid were 3.55 and 4.55, respectively, and that on black carbon were 4.57 and 5.35, respectively, which showed that the absorption amount of pyrene on unit mass of humic acid or black carbon was higher than that of phenanthrene; the adsorption amount of phenanthrene and pyrene on the humic acid and black carbon also showed a trend of increasing and then decreasing with the increase of Ca²⁺ concentration.
- humic acid,
- black carbon,
- phenanthrene and pyrene,
- partition coefficient

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References(23)

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