Distributions and seasonal variations of organochlorine pesticides, polychlorinated biphenyls, and polybrominated diphenyl ethers in surface sediment from coastal areas of central Vietnam

Interactions of molybdenum disulfide nanosheets with wheat plants under changing environments: More than meets the eye?

“…In addition, concentrations of organochlorine pesticides in organisms are higher (ND -1700 ng/g) than the concentrations reported in the three media and significantly higher than in soil (0 -60 ng/g). Although the pesticides in the soil in the PRB have a large span, the average concentration of pesticides is only 3.6 ng/g, which is similar to the level of Taihu Lake and the Bohai Sea (0.24 -5.67 ng/g) (Hu et al, 2009), Xiangjiang (1.52-21.2) ng/g (Zhang et al, 2022) in China, and is significantly lower than in other foreign countries like the Nile River area in Egypt (18 -180 ng/g) (Eissa et al, 2022), the central coasts of Vietnam (9.72-3730 ng/g) (Tham et al, 2019), the Ebro River Delta (up to 18 × 10 4 ng/L) (Barbieri et al, 2021). Pesticides in organisms in the PRB are mainly organochlorine pesticides, with concentrations ranging from ND -1700 ng/g, which is much higher than the concentration in Huanghai (<0.014 -5.3 ng/g) and Lake Chaohu (ND -32.6 ng/g) (Liu et al, 2016), and slightly lower than for biota in the Qiantang River (28 -43,495 ng/g) (Zhou et al, 2008), Internationally, a slightly lower concentration level is detected in the PRB than in Peninsular Malaysia (0.5 -2880 ng/g) (Santhi et al, 2012), Greenland (ND -2000 ng/g) (Vorkamp et al, 2004), and the Danube Delta, Romania (ND -4977 ng/g) (Covaci et al, 2006).…”

Ecological risk assessment of persistent organic pollutants (POPs) in surface sediments from aquaculture system

“…A similar tendency was reported by (Huo et al, 2017) in Lake Chaohu sediments, China and (Lv et al, 2020) in 14 typical intertidal zones of China. The average of TOC in the studied sediments of the shrimp ponds (1.9 ± 1.8%) was in medium level, that is lower to those coastal waters around intensive shrimp ponds in Lampung province, Indonesia (ranged between 0.30 and 9.85%, average 3.09%) and much lower to those from the 5-year-old shrimp culture ponds in the Shanyutan wetland of Min River estuary, South-east China (22.4 ± 2.0%) (Gao et al, 2019); comparable to those Cua Hoi Estuary (average 1.72%) and Han River Estuary (average 1.78%) in coastal area of central Vietnam (Tham et al, 2019).…”

Bioaccumulation of antifouling biocides in mangroves and seagrasses in coastal ecosystems

“…Coastal areas of Thailand, the Philippines and Vietnam were shown to be heavily contaminated by organochlorine compounds by several groups (Cheevaporn et al ., 2005; Carvalho et al ., 2009; Tham et al ., 2019). Other surveys revealed that the coastal waters of Malaysia have been polluted by antifouling biocides (Sudaryanto et al ., 2002, 2004; Harino et al ., 2009 a , 2009 b ; Ohji et al ., 2019, 2022).…”