The effect of resuspension on the fate of total mercury and methyl mercury in a shallow estuarine ecosystem: a mesocosm study

Spatial and Temporal Variation on Distributions of Dissolved and Particulate Arsenic and Mercury in Kuantan River, Pahang

“…In addition, the occurrence of re-suspension related to wind-induced turbulence can also contribute to the increase of bed-shear stress mediated by wave-induced sediment stirring (Paphitis & Collins 2005) and change the distribution of suspended particles during the tidal cycles as well as higher particulate Hg levels at the bottom layer of the water column. Other studies by Choe et al (2003), Kim et al (2004) and Schäfer et al (2006) also observed the importance of re-suspension as a source of particulate mercury in the water column. Sungai Kuantan also registered Hg concentration above the International Commission for the Protection of the Rhine against Pollution (ICPR) Hg limit of 0.500 mg L -1 (ICPR 1991).…”

The role of sediment resuspension duration in release of PAHs

“…It can be concluded from Figure 3 that PAH concentrations in TSS at 0.5 N/m 2 are lower than 0.2 N/m 2 , likely because the entrainment of larger size, and lower contaminated particles at higher energy levels diluted the contaminants and skewed the concentration downward [17] . The decrease in PAH loadings in the progression <25, >63-25 μm further supported these conclusions [25] .…”

“…Recently, Schneider et al [10] investigated that 22% of the resuspended PCBs desorbed after 2 h, and 35% of PCBs were in the dissolved phase in 2 d. Therefore, sediment resuspension, which migrates a large amount of sediment into the water column where they may affect contaminants releasing from particles, could be an important process influencing the release of sedimentary pollutants into overlying water. So far, releasing of sedimentary pollutants during sediment resuspension is the subject of intensive studies [11][12][13][14][15][16][17][18] . Most studies measured organic contaminants release resulting from resuspension energy.…”

Distribution of heavy metals in the water column, suspended particulate matters and the sediment under hydrodynamic conditions using an annular flume

“…A reasonable explanation for this observation is that the entrainment of larger size particles with lower contaminants into the overlying water at higher velocity diluted the heavy metal concentration (Kim et al, 2004). Another possible reason may be due to their redistribution into the water column, resulting from the loss of adsorption sites on particles as the SPM concentration increased (Alkhatib and Berna, 2008), which is supported by the increase in soluble heavy metals at higher velocity as shown in Fig.…”