再生水灌溉土壤典型内分泌干扰物的急性毒性变化规律研究  

Experimental investigation on the variation of acute toxicity of commonendocrinedisruptors in soil irrigated with reclaimed water

作　　者：何顺能 韩玉国[1] 吴文勇[2] 胡雅琪 马蒙 姜婷婷 HE Shunneng;HAN Yuguo;WU Wenyong;HU Yaqi;MA Meng;JIANG Tingting(Beijing Forestry University,Beijing 100091,China;China Academy of Water Resources and Hydropower Sciences,Beijing 100048,China;Shihezi University,Shihezi 832099,China)

机构地区：[1]北京林业大学,北京100091 [2]中国水利水电科学研究院,北京100048 [3]石河子大学,新疆石河子832099

出　　处：《灌溉排水学报》2025年第3期64-69,共6页Journal of Irrigation and Drainage

基　　金：国家自然科学基金面上项目(52079146)。

摘　　要：【目的】探究再生水灌溉条件下土壤中内分泌干扰物在不同通气状态下的毒性降解变化规律。【方法】采用生物急性毒性测试方法,以费氏弧菌为测试生物,通过配制模拟灌溉年限分别为10a(Y1)、50a(Y2)、100a(Y3)、500a(Y4)和1000a(Y5)的内分泌干扰物浓度水平,研究不同灌溉年限土壤在通气状态(T1)、半封闭状态(T2)和完全封闭状态(T3)下的急性毒性变化规律。【结果】T1处理下,土壤环境急性毒性呈增强趋势,但仍处于较低水平,最大发光抑制率为28.23%;T2处理下,土壤环境急性毒性先降低后升高,内分泌干扰物前期降解缓慢,随着时间的推移,降解产物导致土壤环境急性毒性增强,但土壤最终呈无毒或微毒状态;T3处理下,土壤中内分泌干扰物的降解缓慢或趋于停滞,土壤急性毒性水平介于13.70%~21.65%。【结论】不同污染浓度的土壤浸提液并未表现出明显的急性毒性,通气条件对环境中内分泌干扰物的降解存在显著差异。【Objective】Domestic wastewater contains a variety of pollutants,even after standard treatment,with endocrine disruptors being one of the most concerning.However,the biogeochemical transformation of these disruptors in soil following irrigation with reclaimed wastewater is not well understood.This study aims to investigate the changes in acute toxicity of common endocrine disruptors in soil irrigated with reclaimed water under different aerobic conditions.【Method】Bisphenol A(BPA)and nonylphenol(NP)were selected as representative endocrine disruptors in reclaimed wastewater.The changes in their acute toxicity in soil irrigated with reclaimed water under varying aerobic conditions were experimentally studied.Vibrio fischeri was used as the test organism.The concentrations of BPA and NP in the soil were based on estimated concentrations at different times following reclaimed water irrigation:10 years(Y1),50 years(Y2),100 years(Y3),500 years(Y4),and 1000 years(Y5).The acute toxicity of the soil was measured under three conditions:aerobic(T1),aerobic-anaerobic(T2),and anaerobic(T3).【Result】Under aerobic conditions(T1),the acute toxicity of the soil increased over time but remained at a low level,with a maximum luminescence inhibition rate of 28.23%.Under the aerobic-anaerobic condition(T2),the acute toxicity initially decreased and then increased over time.This was likely due to slow degradation of endocrine disruptors in the early stages,followed by an accumulation of metabolites that increased the toxicity.However,after a sufficiently long period,the toxicity decreased.Under anaerobic conditions(T3),the degradation of endocrine disruptors was slow or even stalled.The acute toxicity of the soil ranged from 13.70% to 21.65%.【Conclusion】Soil with varying concentrations of endocrine disruptors did not exhibit significant acute toxicity.Additionally,degradation of these disruptors varied considerably depending on the redox conditions of the soil.Increased bioavailable oxygen enhanced the degradation of end

关 键 词：再生水 费氏弧菌 内分泌干扰物 急性毒性 

分 类 号：X826[环境科学与工程—环境工程]