MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing 100083, PR China; State Key Laboratory of Simulation and Regulation of theWater Cycle in the River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100048, PR China.
MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing 100083, PR China.
Ecotoxicol Environ Saf. 2018 Aug 30;158:28-36. doi: 10.1016/j.ecoenv.2018.03.082. Epub 2018 Apr 12.
Reclaimed water reuse has become an important means of alleviating agricultural water shortage worldwide. However, the presence of endocrine disrupters has roused up considerable attention. Barrel test in farmland was conducted to investigate the migration of nonylphenol (NP) and bisphenol A (BPA) in soil-winter wheat system simulating reclaimed water irrigation. Additionally, the health risks on humans were assessed based on US EPA risk assessment model. The migration of NP and BPA decreased from the soil to the winter wheat; the biological concentration factors (BCFs) of NP and BPA in roots, stems, leaves, and grains all decreased with their added concentrations in soils. The BCFs of NP and BPA in roots were greatest (0.60-5.80 and 0.063-1.45, respectively). The average BCFs of NP and BPA in winter wheat showed negative exponential relations to their concentrations in soil. The amounts of NP and BPA in soil-winter wheat system accounted for 8.99-28.24% and 2.35-4.95%, respectively, of the initial amounts added into the soils. The hazard quotient (HQ) for children and adults ranged between 10 and 1, so carcinogenic risks could be induced by ingesting winter wheat grains under long-term reclaimed water irrigation.
再生水回用已成为缓解全球农业用水短缺的重要手段。然而，内分泌干扰物的存在引起了相当大的关注。本研究通过土培桶实验，模拟再生水灌溉，研究了壬基酚（NP）和双酚 A（BPA）在土壤-冬小麦系统中的迁移。此外，基于美国环保署风险评估模型，评估了其对人类的健康风险。NP 和 BPA 从土壤向冬小麦迁移的量减少；NP 和 BPA 在根、茎、叶和籽粒中的生物浓缩因子（BCF）均随土壤添加浓度的增加而降低。NP 和 BPA 在根中的 BCF 最大（分别为 0.60-5.80 和 0.063-1.45）。NP 和 BPA 在冬小麦中的平均 BCF 与土壤中的浓度呈负指数关系。土壤-冬小麦系统中 NP 和 BPA 的含量分别占初始添加土壤量的 8.99-28.24%和 2.35-4.95%。儿童和成人的危害商（HQ）在 10-1 之间，因此长期再生水灌溉可能会通过摄入冬小麦籽粒而引起致癌风险。
