水稻-蔬菜轮作下 14 C-十溴联苯醚的转化归趋及电子束辐照降解
发布时间:2021-03-11 04:36
十溴联苯醚(BDE-209)是目前使用最广泛的溴代阻燃剂之一,其在环境中的污染问题不容忽视。土壤是环境中多溴联苯醚PBDEs污染最重要的汇,深入认识BDE-209进入土壤后在不同作物中的迁移转化和生物效应,是科学评价其环境安全性和针对性制定污染防治策略的基础。本研究通过对BDE-209的关键分子骨架进行14C标记,将放射性示踪和现代仪器分析技术有机结合,研究了[14C-U-Benzene]-BDE209在水稻-蔬菜轮作体系中的残留动态分布、迁移转化和代谢降解规律;并针对土壤中[14C-U-Benzene]-BDE209的强持留性特征,初步开展了电子束辐照降解土壤中PBDEs的研究。主要结论如下:1.不同水稻品种对[14C-U-Benzene]-BDE209的吸收、富集存在差异。相对于渔稻1号(YD1)和宁粳3号(NJ3),黄华占(HHZ)更容易吸收[14C-U-Benzene]-BDE209。然而,三个品种中,HHZ籽粒里的14C富集量最低,[14C-U-Benzene]-BDE209 在HHZ、YD1和NJ3中的浓度分别为421.8、454.2 和 967.0ng g-1。BDE-2...
【文章来源】:浙江大学浙江省 211工程院校 985工程院校 教育部直属院校
【文章页数】:136 页
【学位级别】:博士
【部分图文】:
图2-3黄华占水稻在35?d温室培养过程中对14C的动态吸收曲线
0?了?>?i??立??as?■?i?¥議n議??9^15-?^?yf'l?^?1??s°?8?'?.?"???{;;?:i:??〇?i.〇-?\?冬?^1t?^?It?^?I??。。5?^?Ab?^?Ab?*?Aab?^?^?尹圍??j00.為?於,於. ̄i?|j::::?t??〇?U-U?1?I?1?I?,111?r-irrn?nr|n?I??卜?HHZ?YD1?NJ3?HHZ?YD1?NJ3?HHZ?YD1?NJ3??图2-4模拟稻田试验中不同水稻品种(黄华占、渔稻1号和宁粳3号)在水??稻幼苗期、孕穗期和成熟期(20,60和120?d)对14C的吸收情况??Figure?2-4?Uptake?of?14C?in?different?rice?cultivars?(dry?weight),?Huanghuazhan??(HHZ),?Yudaol?(YD1)?and?Ningjing?3?(NJ3),?after?20?d,?60?d?and?120?d?of??exposure?in?the?simulated?field?experiment.?Bars?(mean?±?standard?error,?n?=?4)??with?different?capital?letters?indicate?significantly?(P?<?0.05)?different?PBDEs??uptake.?A-B:?different?letters?at?the?same?time?differ?significantly?(P?<?0.05);?a-b:??differe
ne」-BDE209在土壤-水稻中的转化与归趋??0.20??■?root??14C?in?root?=6.22?root?biomass-0.05?R2=0.81??0.16-?■??1?■?B??|?0.12-??0?■??E?0.08?-?"??0.04-?■??0.00?i?1?i?■?i?1?i?1?i??0.015?0.020?0.025?0.030?0.035??Root?biomass?at?20?d?(g?dw)??图2-5水稻根中14C的含量与根重的线形拟合(20?d)??Figure?2-5?Correlation?between?amount?of?14C?in?rice?roots?and?root?dry?weight?(20?d)??0.24??■?root??■??14C?in?root?=?0.11?root?biomass?-?0.03?R2=0.86??0.20-?????1?"??c?〇.i6-??i?.?■??P?0.12-?"??0.08-??i?i?■?i?■?i?1?i?1?i?1?i?1?i??0.2?0.4?0.6?0.8?1.0?1.2?1.4?1.6??Root?biomass?at?60?d(g?dw)??图2-6水稻根中14C的含量与根重的线形拟合(60?d)??Figure?2-6?Correlation?between?amount?of?14C?in?rice?roots?and?root?dry?weight?(60?d)??45??
本文编号:3075869
【文章来源】:浙江大学浙江省 211工程院校 985工程院校 教育部直属院校
【文章页数】:136 页
【学位级别】:博士
【部分图文】:
图2-3黄华占水稻在35?d温室培养过程中对14C的动态吸收曲线
0?了?>?i??立??as?■?i?¥議n議??9^15-?^?yf'l?^?1??s°?8?'?.?"???{;;?:i:??〇?i.〇-?\?冬?^1t?^?It?^?I??。。5?^?Ab?^?Ab?*?Aab?^?^?尹圍??j00.為?於,於. ̄i?|j::::?t??〇?U-U?1?I?1?I?,111?r-irrn?nr|n?I??卜?HHZ?YD1?NJ3?HHZ?YD1?NJ3?HHZ?YD1?NJ3??图2-4模拟稻田试验中不同水稻品种(黄华占、渔稻1号和宁粳3号)在水??稻幼苗期、孕穗期和成熟期(20,60和120?d)对14C的吸收情况??Figure?2-4?Uptake?of?14C?in?different?rice?cultivars?(dry?weight),?Huanghuazhan??(HHZ),?Yudaol?(YD1)?and?Ningjing?3?(NJ3),?after?20?d,?60?d?and?120?d?of??exposure?in?the?simulated?field?experiment.?Bars?(mean?±?standard?error,?n?=?4)??with?different?capital?letters?indicate?significantly?(P?<?0.05)?different?PBDEs??uptake.?A-B:?different?letters?at?the?same?time?differ?significantly?(P?<?0.05);?a-b:??differe
ne」-BDE209在土壤-水稻中的转化与归趋??0.20??■?root??14C?in?root?=6.22?root?biomass-0.05?R2=0.81??0.16-?■??1?■?B??|?0.12-??0?■??E?0.08?-?"??0.04-?■??0.00?i?1?i?■?i?1?i?1?i??0.015?0.020?0.025?0.030?0.035??Root?biomass?at?20?d?(g?dw)??图2-5水稻根中14C的含量与根重的线形拟合(20?d)??Figure?2-5?Correlation?between?amount?of?14C?in?rice?roots?and?root?dry?weight?(20?d)??0.24??■?root??■??14C?in?root?=?0.11?root?biomass?-?0.03?R2=0.86??0.20-?????1?"??c?〇.i6-??i?.?■??P?0.12-?"??0.08-??i?i?■?i?■?i?1?i?1?i?1?i?1?i??0.2?0.4?0.6?0.8?1.0?1.2?1.4?1.6??Root?biomass?at?60?d(g?dw)??图2-6水稻根中14C的含量与根重的线形拟合(60?d)??Figure?2-6?Correlation?between?amount?of?14C?in?rice?roots?and?root?dry?weight?(60?d)??45??
本文编号:3075869
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