Seasonal attributes of urban soil PAHs of the Brahmaputra Valley

Hussain, Karishma; Hoque, Raza Rafiqul

doi:10.1016/j.chemosphere.2014.08.021

Cited by 55 publications

(24 citation statements)

References 34 publications

(45 reference statements)

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“…Seasonal relationship of BC and OC with PAHs would mean changes in the characteristics of sources and climatic conditions, favouring formation of OC in the atmosphere. Agarwal and Bucheli (2011) reported that in Indian soil BC could be a better predictor for PAHs distribution than that of OC, however, later in another study Hussain and Hoque (2015) found distinct seasonal trend of PAHs and BC relationships in the soil of Guwahati city.…”

Section: Carbon and Seasonal Relationship With Pahsmentioning

confidence: 93%

See 1 more Smart Citation

Street dust bound PAHs, carbon and heavy metals in Guwahati city – Seasonality, toxicity and sources

Hussain

Rahman

Prakash

et al. 2015

Sustainable Cities and Society

Self Cite

114

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Section: Carbon and Seasonal Relationship With Pahsmentioning

confidence: 93%

“…Assessments of PAHs in soil and surface water of Guwahati city have given new understanding of their distribution (Hussain & Hoque, 2015;Hussain, Rajbangshi, & Hoque, 2014), yet street dust contamination by PAHs needed to be explored.…”

Section: Introductionmentioning

confidence: 99%

Street dust bound PAHs, carbon and heavy metals in Guwahati city – Seasonality, toxicity and sources

Hussain

Rahman

Prakash

et al. 2015

Sustainable Cities and Society

Self Cite

114

View full text Add to dashboard Cite

“…The concentration of high molecular weight PAHs (∑HMWPAHs) showed lower variability than that of low molecular weight PAHs (∑LMWPAHs) along with the season change, because the higher solubility of LMWPAHs makes them easily enter the aquatic environment, more susceptible to be affected by the environmental conditions, such as long-distance transmission and evaporation. High temperatures and heavy rainfall in summer contributed to the conduct of this mechanism [39]. The HMWPAHs are relatively stable, are less affected by environmental conditions, and are not easily desorbed from sediments and degraded [50].…”

Section: Temporal and Spatial Characteristics Of The ∑Pahs In Sedimentsmentioning

confidence: 99%

“…The uneven seasonal distribution of PAHs in sediments could be attributed to the difference of rainfall and temperature in different seasons. Strong rainfall can scour the surface, carrying the PAHs into the river [38]; high temperature could lead to their subsequent evaporation and degradation [39]. So the least concentration of PAHs appeared in summer.…”

Section: Temporal and Spatial Characteristics Of The ∑Pahs In Sedimentsmentioning

confidence: 99%

Source and Ecological Risk Characteristics of PAHs in Sediments from Qinhuai River and Xuanwu Lake, Nanjing, China

Zhao

Qin

Cao

et al. 2017

Journal of Chemistry

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In order to investigate the residual characteristics, sources, and ecological risk of PAHs in sediment from urban rivers, the sediments of 15 typical sites from Qinhuai River and Xuanwu Lake, which are typical urban rivers and lake, were collected from October 2015 to July 2016; the sources of PAHs in sediment were also identified by several methods. Results showed that ∑PAHs concentration in sediment ranged from 796.2 ng/g to 10,470 ng/g with an average of 2,713.8 ng/g. High molecular weight PAHs with 4-5 rings were most prominent in the sediment during all four seasons. Source characterization studies based on the analysis of diagnostic ratio (triangular plot method), cluster analysis, and positive factor matrix analysis suggested that the PAHs of Qinhuai River Basin were mainly from pyrogenic origin (biomass and coal combustion and vehicular emission), and the petroleum source also cannot be ignored (specially in summer). Most individual PAHs occasionally affect the aquatic organisms. The highest benzo[a]pyreneequivalent doses (BaP eq dose) appear at the sites of sewage discharge and heavy traffic. So, the PAHs pollution sources of urban water body have obvious seasonal-dependent and human activities-dependent characteristics.

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“…This could reduce the cost of the application and simplify the operational processes of immobilized laccase. Previous studies 33 have shown that through immobilization, the loss of laccase activity decreased greatly, and the activity of laccase was generally considered stable. Under different pH values, it could be seen that the laccase can maintain a certain activity in near neutral or acid conditions.…”

Section: Resultsmentioning

confidence: 95%

Degradation of polycyclic aromatic hydrocarbons in contaminated soil by immobilized laccase

Wang

Sun

et al. 2018

J Serb Chem Soc

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The biodegradation of polycyclic aromatic hydrocarbons (PAHs) in soils by laccase is reported. However, the low laccase activities of free laccase have limited its applications in environmental bioremediation. In this study, polluted soil was made with 3:1 volume ratio of soil to PAH solution. Subsequently, the adsorption-cross-link composite immobilization method was applied to immobilize laccase derived from fungi onto nylon net and chitosan, respectively. These two kinds of immobilized laccase were used in the degradation of pyrene (Pyr) and benzo[a]pyrene (BaP), and their degradation efficiencies under different temperature and pH conditions were investigated. Consequently, the optimal laboratory experimental parameters were determined as follows: first, compared with free laccase, the degradation rates of Pyr and BaP by immobilized laccase increased by around 10-30 %; second, the degradation efficiency of chitosan as a carrier of immobilized laccase was much better than that of nylon net as a carrier of the immobilized laccase; finally, when the temperature was set at 40 °C and the pH was set at 4, the degradation efficiency achieved by immobilized laccase was the best.

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Seasonal attributes of urban soil PAHs of the Brahmaputra Valley

Cited by 55 publications

References 34 publications

Street dust bound PAHs, carbon and heavy metals in Guwahati city – Seasonality, toxicity and sources

Street dust bound PAHs, carbon and heavy metals in Guwahati city – Seasonality, toxicity and sources

Source and Ecological Risk Characteristics of PAHs in Sediments from Qinhuai River and Xuanwu Lake, Nanjing, China

Degradation of polycyclic aromatic hydrocarbons in contaminated soil by immobilized laccase

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