Ice phase as an important factor on the seasonal variation of polycyclic aromatic hydrocarbons in the Tumen River, Northeastern of China

Abstract

The ice phase as an important factor affecting on the seasonal variation of PAHs in Tumen River environment. Further studies regarding the effects of air pollution on the river and the mechanisms of migration and transformation of them in the environment are currently being conducted in our laboratory.

Source contributions and spatiotemporal characteristics of PAHs in sediments: Using three‐way source apportionment approach

“…With the increasing attention to pollution in sediments, not only the spatial distribution but also the temporal variations (sampling seasons) of PAHs in the investigated watersheds have been taken into account by researchers. For example, Lee et al [21] conducted field monitoring of PAHs for multimedia seasonally at 7 sites, and Cong et al [22] investigated the seasonal variations of PAHs in the Tumen River. Thus, more 3-way sedimentary datasets are being produced, with 1 way for PAH compositions, 1 for spatial variability (sampling sites), and 1 for temporal variability (sampling seasons).…”

Polycyclic Aromatic Hydrocarbons in the Estuaries of Two Rivers of the Sea of Japan

“…In the Tumen River, the PAH concentrations in the estuarine samples were below those in the middle river reach samples, with mean annual PAH concentrations of 68 and 104 ng/L re-estimated for the 13 researched DPAHs and PPAHs, respectively [ 21 ]. Apparently, the higher PAH concentration in the middle Tumen River results from severe anthropogenic stress from Chinese and North Korean industrial and residential activities [ 31 ], while surrounding estuary areas are scarcely populated and have no relevant roads or industries. Thus, the PAHs observed in the estuary were certainly caused by transboundary PAH transport from polluted upstream areas.…”

“…In the Partizanskaya river estuary, the trend in seasonal PAH variation is typical for regions under climatic conditions with a cold season and is described in a number of works, including for coastal water of the northwestern Sea of Japan [ 16 , 27 , 31 ]. The noticeable rise in TPAHs concentrations observed during the cold period resulted from significant PAH emissions from residential and municipal heating systems.…”

“…Differences in the distribution of PAH in saline and fresh waters between rivers may be the result of different methods of PAH input to the estuaries. In the Tumen River estuary, the major PAH source is river water, which delivers PAHs from contaminated upstream areas of China and North Korea [ 31 ], while in the Partizanskaya River estuary, riverine and coastal waters have common nonpoint PAH sources. In the coastal area adjacent to the Partizanskaya estuary is the town of Nakhodka, which has heavy traffic and several ports with open coal terminals.…”

“…The predominance of 4-ring PAHs over 3-ring ones (studied in this work) was also found for the Jiulong River and the Tiber River estuaries [35,36] and may be associated with the high estuarine bioproductivity. As estuarine In the Partizanskaya river estuary, the trend in seasonal PAH variation is typical for regions under climatic conditions with a cold season and is described in a number of works, including for coastal water of the northwestern Sea of Japan [16,27,31]. The noticeable rise in TPAHs concentrations observed during the cold period resulted from significant PAH emissions from residential and municipal heating systems.…”