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首页> 外文期刊>Environmental toxicology and chemistry >MINERALIZATION AND PLANT UPTAKE OF ~(14)C-LABELED NONYLPHENOL, NONYLPHENOL TETRAETHOXYLATE, AND NONYLPHENOL NONYLETHOXYLATE IN BIOSOLIDS/SOIL SYSTEMS PLANTED WITH CRESTED WHEATGRASS
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MINERALIZATION AND PLANT UPTAKE OF ~(14)C-LABELED NONYLPHENOL, NONYLPHENOL TETRAETHOXYLATE, AND NONYLPHENOL NONYLETHOXYLATE IN BIOSOLIDS/SOIL SYSTEMS PLANTED WITH CRESTED WHEATGRASS

机译：〜（14）C种植壬基酚的土壤/土壤系统中〜（14）C标记的壬基酚，壬基酚四乙氧基化物和壬基酚壬基羟化物的矿化和植物吸收

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Microcosm experiments (duration, 150 d) were conducted to evaluate the mineralization and plant uptake of [~(14)C]nonylphenol (NP). [~(14)C]nonylphenol tetraethoxylate (NPE4), and [~(14)C]nonyLphenol nonylethoxylate (NPE9) in a soil/biosolids (99.5:0.5 w/w) environment planted with crested wheatgrass (Agropyron cristatum). Three initial nominal concentrations (6, 24, and 47 mg/kg dry wt) each of NP, NPE4, and NPE9 were examined along with unplanted and unplanted poisoned controls. Phenol (22 mg/kg) also was evaluated as a more degradable reference compound. The biosolids were obtained from a municipal treatment plant, and the loamy sand soil was freshly collected. Mineralization ranged from 7% for NP to 53% for phenol, and no enhancement was observed in the planted systems. For NP, NPE4, and NPE9, ~(14)C foliar tissues concentrations were proportional to exposure concentrations but were 10-fold lower than the root concentrations and two- to threefold lower than the soil concentrations. Bioconcentration factors (BCFs) based on ~(14)C measurements ranged from 0.31 (mg compound/kg dry plant/ mg compound/kg dry soil) for systems spiked with NP to 0.52 for systems spiked with NPE9. Results of the NP analysis (initial concentration, 47 mg/ kg) showed a 90% decrease in the soil concentration and an average BCF of 1.0. The lower BCF calculated from the ~(14)C analysis likely resulted from the presence of NP transformation products in the soil that arc less available or are translocated by the plants but quantified by the combustion/liquid scintillation counting procedure.
机译：进行了缩影实验（持续时间为150天）以评估[〜（14）C]壬基酚（NP）的矿化作用和植物吸收。在土壤/生物固体（99.5：0.5 w / w）环境中种植冠毛麦草（Agropyron cristatum）的[〜（14）C]壬基酚四乙氧基化物（NPE4）和[〜（14）C]壬基酚四乙氧基化物（NPE9）。分别检查了NP，NPE4和NPE9的三个初始标称浓度（6、24和47 mg / kg干重）以及未植入和未植入的中毒对照。还评估了苯酚（22 mg / kg）作为更易降解的参考化合物。从城市污水处理厂获得生物固体，并新鲜收集壤土。矿化的范围从NP的7％到苯酚的53％，在种植的系统中未观察到增强。对于NP，NPE4和NPE9，〜（14）C叶组织浓度与暴露浓度成正比，但比根部浓度低10倍，比土壤浓度低2至3倍。基于〜（14）C测量的生物浓缩因子（BCF）范围从NP加标系统的0.31（mg化合物/ kg干燥植物/ mg化合物/ kg干燥土壤）到NPE9加标系统的0.52。 NP分析的结果（初始浓度为47 mg / kg）显示土壤浓度降低90％，平均BCF为1.0。由〜（14）C分析计算得出的较低BCF可能是由于土壤中存在NP转化产物而产生的，NP转化产物较难获得或被植物转移，但通过燃烧/液体闪烁计数程序进行了量化。

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