流溪河水库柱状沉积物磷形态组成特征研究  

Distribution and Pollution Characteristics of Phosphorus Fractions in Core Sediments of Liuxihe Reservoir

作　　者：张华俊 张文磊[1] ZHANG Huajun;ZHANG Wenlei(School of Tourism and Resource Environment,Qiannan Normal University for Nationalities,Duyun 558000,China;Institute of Hydrobiology,Jinan University,Guangzhou 518040,China)

机构地区：[1]黔南民族师范学院旅游与资源环境学院,贵州都匀558000 [2]暨南大学水生生物研究所,广州518040

出　　处：《三峡生态环境监测》2024年第4期116-125,共10页Ecology and Environmental Monitoring of Three Gorges

基　　金：贵州省教育厅高校人文社会科学研究项目(2024RW307)。

摘　　要：为揭示流溪河水库沉积物磷形态组成与分布特征,在水库4处代表性区域采集柱状沉积物,采用SMT(sequential multi-step extraction)法进行磷分级含量进行测定,综合分析沉积物磷盐分布及组成对水质的潜在影响。研究结果表明:流溪河水库表层沉积物总磷(total phosphorus,TP)含量在196.15~490.25 mg/kg,处于轻度污染水平;无机磷(inorganic phosphorus,IP)和有机磷(organic phosphorus,OP)浓度分别在71.69~203.45 mg/kg和99.65~202.82 mg/kg;氢氧化钠提取磷(铁铝结合磷)(sodium hydroxide extraction of phosphorus,NaOH-P)浓度在65.47~134.75 mg/kg;盐酸提取磷(钙结合磷)(hydrochloric acid extraction of phosphorus,HCl-P)浓度在25.30~65.02 mg/kg,所有样点IP占TP比例在30.55%~32.92%,OP占TP比例在41.37%~50.80%,除吕田外其余样点沉积物OP为TP的主要形态。IP以NaOH-P为主,NaOH-P含量占到IP含量的53.45%以上。流溪河水库沉积物TP与磷形态含量间存在极显著正相关关系,说明该水库沉积物中磷形态含量相互间显著影响且来源相同。流溪河水库沉积物中烧失量(loss on ignition,LOI_(550))与OP和NaOH-P相关性显著,而与TP和IP相关性不强。流溪河水库沉积物磷形态组成及气候特点表明该水库中沉积物具有一定的磷释放能力。To reveal the composition and distribution characteristics of phosphorus phosphorus forms in sediments of Liuxihe Reservoir,columnar sediments were collected from four representative areas of the reservoir,and SMT(sequential multi-step sampling)was used to determine the phosphorus content and comprehensively analyze the potential impact of sediment phosphorus distribution and composition on water quality.The total phosphorus(TP) contents of surface sediments at four sampling sites were between196.15 and 490.25 mg/kg,which were classified as slightly polluted;inorganic phosphorus(IP) contents were ranged from 71.69 mg/kg to 203.45 mg/kg;Organic phosphorus(OP) contents were ranged from 99.65 mg/kg to 202.82 mg/kg;NaOH extractable phosphorus(NaOH-P) contents were ranged from 65.47 mg/kg to 134.75 mg/kg;HCl extractable phosphorus(HCl-P) contents were ranged from 25.30 mg/kg to 65.02 mg/kg.OP was the dominant fraction of phosphorus in the sediment and the NaOH-P was the main forms of IP.A significant relationship was found between the TP and phosphorus fractions.The results show that the sources of phosphorus fractions in sediments of Liuxihe Reservoir are relatively uniform.A significant relationship was found between the LOI_(550) and OP,NaOH-P.The composition characteristics of phosphorus fractions in the sediments of Liuxihe Reservoir indicate that the sediments had potential phosphorus release capacity.

关 键 词：水库 柱状沉积物 磷形态 磷释放 富营养化 

分 类 号：X52[环境科学与工程—环境工程]