TY - JOUR
T1 - Improved prediction of the bioconcentration factors of organic contaminants from soils into plant/crop roots by related physicochemical parameters
AU - Li, Yuanbo
AU - Chiou, Cary T.
AU - Li, Hui
AU - Schnoor, Jerald L.
N1 - Funding Information:
CTC was supported by a research fund (D105-33B05) from National Cheng Kung University, Taiwan; YL and HL were supported by Agriculture and Food Research Initiative Competitive Grant 2016-67017-24514 from USDA National Institute of Food and Agriculture; JLS was funded by the U.S. NIEHS Iowa Superfund Research Program Grant No. P42ES013661.
Funding Information:
CTC was supported by a research fund ( D105-33B05 ) from National Cheng Kung University , Taiwan; YL and HL were supported by Agriculture and Food Research Initiative Competitive Grant 2016-67017-24514 from USDA National Institute of Food and Agriculture; JLS was funded by the U.S. NIEHS Iowa Superfund Research Program Grant No. P42ES013661 .
Publisher Copyright:
© 2019 The Authors
PY - 2019/5
Y1 - 2019/5
N2 - There has been an on-going pursuit for relations between the levels of chemicals in plants/crops and the source levels in soil or water in order to address impacts of toxic substances on human health and ecological quality. In this research, we applied the quasi-equilibrium partition model to analyze the relations for nonionic organic contaminants between plant/crop roots and external soil/water media. The model relates the in-situ root concentration factors of chemicals from external water into plant/crop roots (RCF(water)) with the system physicochemical parameters and the chemical quasi-equilibrium states with plant/crop roots (αpt, ≤1). With known RCF(water) values, root lipid contents (flip), and octanol-water Kow's, the chemical-plant αpt values and their ranges of variation at given flipKow could be calculated. Because of the inherent relation between αpt and flipKow, a highly distinct correlation emerges between log RCF(water) and log flipKow (R2 = 0.825; n = 368), with the supporting data drawn from 19 disparate soil-plant studies covering some 6 orders of magnitude in flipKow and 4 orders of magnitude in RCF(water). This correlation performs far better than any relationship previously developed for predicting the contamination levels of pesticides and toxic organic chemicals in plant/crop roots for assessing risks on food safety.
AB - There has been an on-going pursuit for relations between the levels of chemicals in plants/crops and the source levels in soil or water in order to address impacts of toxic substances on human health and ecological quality. In this research, we applied the quasi-equilibrium partition model to analyze the relations for nonionic organic contaminants between plant/crop roots and external soil/water media. The model relates the in-situ root concentration factors of chemicals from external water into plant/crop roots (RCF(water)) with the system physicochemical parameters and the chemical quasi-equilibrium states with plant/crop roots (αpt, ≤1). With known RCF(water) values, root lipid contents (flip), and octanol-water Kow's, the chemical-plant αpt values and their ranges of variation at given flipKow could be calculated. Because of the inherent relation between αpt and flipKow, a highly distinct correlation emerges between log RCF(water) and log flipKow (R2 = 0.825; n = 368), with the supporting data drawn from 19 disparate soil-plant studies covering some 6 orders of magnitude in flipKow and 4 orders of magnitude in RCF(water). This correlation performs far better than any relationship previously developed for predicting the contamination levels of pesticides and toxic organic chemicals in plant/crop roots for assessing risks on food safety.
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U2 - 10.1016/j.envint.2019.02.020
DO - 10.1016/j.envint.2019.02.020
M3 - Article
C2 - 30776749
AN - SCOPUS:85061538877
VL - 126
SP - 46
EP - 53
JO - Environmental International
JF - Environmental International
SN - 0160-4120
ER -