有机磷酸酯阻燃剂(OPFRs)是引起内分泌干扰的新兴环境污染物,神经毒性,和生殖毒性。污水污泥是释放到环境中的三OPFR的重要来源。的发生,分布,OPFRs在全规模“Cambi®热水解(TH)+高级厌氧消化(AAD)+板框压力过滤”污泥处理工艺中的生态风险与污水污泥的应用密切相关。我们测试了北京一家污水处理厂的污泥样本,中国。在四个季节的不同处理单元收集的污泥样品中检测到9个三OPFR。ΣOPFRs从1,742.65-2,579.68ng/g降至971.48-1,702.22ng/g。处理后的污泥中三OPFRs的质量流量降低了61.4%,48.9%,42.4%,春季为63.9%,夏天,秋天和冬天,分别,有效降低相应的生态风险。林地污泥中三OPFR的生态风险主要在于氯化三OPFR,特别是TCPP和TCEP。不大于42.20t/hm2的污泥可连续使用一年,以防止三OPFRs超过低生态风险水平,表明当前常用的污泥比例(1.6-30t/hm2)可能不会增加三OPFRs的生态风险。
Organophosphate flame retardants (OPFRs) are emerging environmental pollutants that cause endocrine disruption, neurotoxicity, and reproductive toxicity. Sewage sludge is an important source of tri-OPFRs that are released into the environment. The occurrence, distribution, and ecological risk of OPFRs in the full-scale \"Cambi® thermal hydrolysis (TH) + advanced anaerobic digestion (AAD) + plate-frame pressure filtration\" sludge treatment process is closely related to the application of sewage sludge. We tested sludge samples from a wastewater treatment plant in Beijing, China. Nine tri-OPFRs were detected in the sludge samples collected at different treatment units during four seasons. The ΣOPFRs decreased from 1,742.65-2,579.68 ng/g to 971.48-1,702.22 ng/g. The mass flow of tri-OPFRs in treated sludge decreased by 61.4%, 48.9%, 42.4%, and 63.9% in spring, summer, autumn and winter, respectively, effectively reducing the corresponding ecological risk. The ecological risk of tri-OPFRs in sludge in forestland utilization mainly lies in chlorinated tri-OPFRs, especially TCPP and TCEP. No >42.20 t/hm2 of sludge could be used continuously for one year to prevent tri-OPFRs from exceeding the low ecological risk level, indicating that the current commonly applied proportion of sludge (1.6-30 t/hm2) will likely not raise the ecological risk of tri-OPFRs.