生态与农村环境学报2023，Vol.39Issue(12)：1547-1558,12.DOI:10.19741/j.issn.1673-4831.2023.0607
乌鲁木齐及周边区域河道沉积物氮磷赋存形态特征及污染评价
Characteristics and Pollution Assessment of Nitrogen and Phosphorus Fractions in River Sediments in Urumqi and Surrounding Areas
摘要
Abstract
In Urumqi and surrounding areas,5 typical river channels were selected,with 3 sampling points(a total of 15 sampling points)set up for each channel to collect sediment samples.By measuring the physical and chemical properties,nitrogen and phosphorus content,and fractions of river sediments,and evaluating the ecological risk of nitrogen and phos-phorus pollution levels in river sediment,so as to reveal the distribution characteristics of nitrogen and phosphorus content and fractions in river sediments and their potemtial ecological risks.The results show that the total nitrogen contents of the sediments were between 1 699.23 and 3 702.93 mg·kg-1(the average content was 2 799.40 mg·kg-1),and the total phosphorus contents were between 596.65 to 1 729.53 mg·kg-1(the average content was 994.82 mg·kg-1).The main fractions of transformable nitrogen(TTN)in the sediment were strong oxidant leaehable nitrogen(SOEF-N)and weak acid leachable nitrogen(WAEF-N),accounting for 43.94％and 40.42％of TTN,respectively.The main phosphorus fractions of inorganic phosphorus in the sediments were calcium-bound phosphorus(HC1-P)and residual phosphorus(Res-P),accounting for 58.94％and 14.94％of total phosphorus(TP),respectively.The average content of bioavailable phosphorus(BAP)was 134.92 mg·kg-1,accounting for 12.48％of TP.The main fractions of organic phos-phorus in the sediment were fulvic acid-bound organic phosphorus(Fulvic-OP)and hydrochloric acid-leachable organic phosphorus(HCl-OP),accounting for 34.38％and 32.95％of organic phosphorus,respectively.According to Redundan-cy analysis,TP content,pH,and Fe2O3 content were the main factors affecting the distribution characteristics of nitrogen and phosphorus fractions in river sediments.The comprehensive pollution index method evaluation show that the compre-hensive pollution degrees of TP and TN in the river sediments were moderate or severe.The results can provide basic data and scientific basis for urban river water environment management and river administration in the northwest arid region of China.关键词
河流沉积物/氮形态/磷形态/生物有效磷Key words
river sediment/nitrogen fractions/phosphorus fractions/bioavailable phosphorus分类
资源环境引用本文复制引用
粟文豪,朱新萍,王灵,雷荣荣,韩天伦,汪龙眠,孔明..乌鲁木齐及周边区域河道沉积物氮磷赋存形态特征及污染评价[J].生态与农村环境学报,2023,39(12):1547-1558,12.基金项目
新疆维吾尔自治区科技支疆项目计划(2022E02026) （2022E02026）
新疆农业大学研究生校级科研创新计划(XJAUGRI2023049) （XJAUGRI2023049）
