Preparation, modification and environmental application of biochar: A review

The adsorption, regeneration and engineering applications of biochar for removal organic pollutants: a review.

Biochar technology in wastewater treatment: A critical review.

The Polycyclic Aromatic Hydrocarbons (PAHs or polyaromatic hydrocarbons) have been extensively studied to understand their distribution, fate and effects in the environment (Haftka 2009; Laane et al. 1999, 2006, 2013; Okuda et al. 2002; Page et al. 1999; Pavlova and Ivanova 2003; Stout et al. 2001a; Zhang et al. 2005). They are organic compounds consisting of conjoined aromatic rings without heteroatoms (Schwarzenbach et al. 2003). Sander and Wise (1997) list 660 parent PAH compounds (i.e., aromatic substances without alkyl groups and consisting solely of fused rings connected to each other), ranging from the monocyclic molecule of benzene (molecular weight = 78) up to nine-ringed structures (MW up to 478). PAHs containing one or more alkyl groups are called alkyl PAHs. Our study deals with the parent compounds (without alkyl groups and/or heteroatoms), the alkyl PAHs (denoted as PAHn, with n referring to the number of methyl groups; see footnotes in Table 1), and certain heterocyclic sulfur PAHs (dibenzothiophenes). The term PAHs includes all the above, unless explicitly specified. In Table 1, we present the nomenclature of PAHs used in this paper.

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Source characterization of polycyclic aromatic hydrocarbons by using their molecular indices: an overview of possibilities

The recent literature describing polycyclic aromatic hydrocarbons (PAHs) in air, water, soil and sediment, waste sludge, biomonitoring, toxicity, are reviewed. Aspects of sampling, sample preparati...

Polycyclic aromatic hydrocarbons. A review

Adsorption behavior and mechanism of pentachlorophenol on reed biochars: pH effect, pyrolysis temperature, hydrochloric acid treatment and isotherms

Cancer risk of polycyclic aromatic hydrocarbons (PAHs) in the soils from Jiaozhou Bay wetland.

A magnetic reed biochar (MRBC) was synthesized through chemical co-precipitation firstly and subsequently pyrolysis. The MRBC and reed biochar (RBC) were characterized by SEM, XRD, FTIR and VSM and were used for the adsorption of florfenicol (FF). Batch experiment results showed that the FF adsorption on MRBC exhibited a pronounced pH-dependent pattern and presented a bell curve. However, the FF adsorption on RBC decreased gradually with the increasing pH values. Ionic strength initially inhibited and then promoted the FF adsorption and the multivalent co-existing anions significantly increased the FF adsorption on MRBC. The FF adsorption was non-spontaneous, exothermic and entropy-decreasing on MRBC and was of a non-spontaneous, endothermic and entropy-increasing nature on RBC. The pseudo second-order model presented better fittings for the FF adsorption kinetic data. Langmuir and Freundlich models can well describe FF adsorption on MRBC and RBC, respectively. The FF adsorption on RBC may be controlled by pore-filling effect and π–π EDA interaction, while hydrogen bonding, pore-filling effect and π–π EDA interaction contributed to the FF adsorption on MRBC. The adsorption–regeneration cycles confirmed that the MRBC was a highly efficient and reusable adsorbent for the removal of FF from aqueous solution.

Yinhai Lang

Papers

Adsorption behavior and mechanism of pentachlorophenol on reed biochars: pH effect, pyrolysis temperature, hydrochloric acid treatment and isotherms

Cancer risk of polycyclic aromatic hydrocarbons (PAHs) in the soils from Jiaozhou Bay wetland.

Adsorption behaviors and mechanisms of florfenicol by magnetic functionalized biochar and reed biochar

Quantitative evaluation of carcinogenic and non-carcinogenic potential for PAHs in coastal wetland soils of China

Source contributions of PAHs and toxicity in reed wetland soils of Liaohe estuary using a CMB–TEQ method