Occurrence of organic chlorinated pesticides and their ecological effects on soil protozoa in the agricultural soils of North Western Beijing, China

Simultaneous bioremediation of Cr(VI) and lindane in soil by actinobacteria

“…The contaminant concentrations tested were selected based upon previous studies, while also taking international standards for permissible levels in soils into consideration (9 mg kg À1 for Cr(VI) and 10 mg kg À1 for lindane), in order to ensure that microorganisms with high toxicity resistance could be obtained (Argentina, 2003(Argentina, , 2005Benimeli et al, 2006). The concentrations used are also consistent with those observed by a variety of authors in co-contaminated environments (Roane et al, 2001;El Deeb and Altalhi, 2009;Olaniran et al, 2009;Orton et al, 2013;Shi et al, 2013), who have reported lindane and Cr(VI) concentrations in the order of mg L À1 and mg L À1 , respectively, in different environmental compartments such as soil, groundwater, rainwater, etc. Such contamination levels are sufficient to produce acute toxicity in animals (Srivastava et al, 2007;Harris et al, 2011).…”

Role of Actinobacteria in Bioremediation

“…However, there are microorganisms able to carry out their degradation and several metabolic pathways have been described (Table 11.1). The use of pesticide has been extensive, which explains its ubiquity (Wan et al, 2005;Amaraneni, 2006;Mansour et al, 2009;Matsumoto et al, 2009;Arias et al, 2011;Mansour, 2012;Shi et al, 2013). (FAOUN, 2002).…”

Distribution characteristics of organochlorine pesticides in soil, water, and sediment from the Bahe River, China

“…Concentrations of the other HCH isomers, a-HCH, g-HCH, and d-HCH, ranged from 0.01 to 0.07 ng/g (mean 0.02 ng/g), 0.01 to 0.09 ng/g (mean 0.03 ng/g), n.d. to 0.08 ng/g (mean 0.03 ng/g), respectively (Table 1). Compared to other regions of China and other countries, HCH contamination in the surface soils along the Bahe River was lower than in such areas within China as Shanghai (2.4 ng/g; Jiang et al, 2009), Harbin (7.1 ng/g; Wang et al, 2009), Hong Kong (6.2 ng/g; Zhang et al, 2006), Beijing (31.1 ng/g; Shi et al, 2013), and the Pearl River Delta (3.4 ng/g; Yu et al, 2013), as well as areas within other countries such as India (825 ng/g; Mishra et al, 2012) and Vietnam (7.4 ng/g; Toan et al, 2009). However, the concentration was slightly higher than the values observed in Dashiwei Tiankeng (0.11 ng/g; Wang et al, 2013).…”