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Resolving the influence of nitrogen abundances on sediment organic matter in macrophyte-dominated lakes, using fluorescence spectroscopy

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Journal of Environmental Sciences 2015年第1期27卷 197-206页

作者： Xin Yao Shengrui Wang Lixin Jiao Caihong Yan xiangcan jin State Key Laboratory of Environmental Criteria and Risk Assessment State Environmental Protection Key Laboratory for Lake Pollution Control Research Center of Lake Eco-environment Chinese Research Academy of Environmental Sciences School of Environment and Planning Liaocheng University

A controlled experiment was designed to resolve the influence of nitrogen abundance on sediment organic matters in macrophyte-dominated lakes using fluorescence *** biomass showed coincident growth trends with time, but different variation rates with nitrogen treatment. All plant growth indexes with nitrogen addition（N, NH4Cl100, 200, 400 mg/kg, respectively） were lower than those of the control group. Four humiclike components, two autochthonous tryptophan-like components, and one autochthonous tyrosine-like component were identified using the parallel factor analysis model. The results suggested that the relative component changes of fluorescence in the colonized sediments were in direct relation to the change of root biomass with time. In the experiment, the root formation parameters of the plants studied were significantly affected by adding N in sediments, which may be related to the reason that the root growth was affected by N *** a low concentration of N to sediments can play a part in supplying nutrients to the plants. However, the intensive uptake of NH4^＋may result in an increase in the intracellular concentration of ammonia, which is highly toxic to the plant cells. Hence, our experiment results manifested that organic matter cycling in the macrophyte-dominated sediment was influenced by nitrogen enrichment through influencing vegetation and relevant microbial activity.

关键词： Colonized sediment Non-colonized sediment Nitrogen enrichment Submersed macrophyte Sediment organic matter Fluorescence feature

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Spatial distribution of phosphorus forms in sediments with different distances to the estuary of the Dianchi Lake,China

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Frontiers of Environmental Science & Engineering 2010年第3期4卷 295-300页

作者： Shaoyong LU xiangcan jin Fengchang WU Jianning GUO jing SI Research Center of Lake Eco-environment Chinese Research Academy of Environmental SciencesBeijing 100012China Department of Environmental Engineering Jilin Architectural and Civil Engineering InstituteChangchun 130021China

Effects of human activity on the distribution of phosphorus(P)forms were investigated for the sediments and porewaters in Daqinghe Estuary of Dianchi Lake,*** concentrations of total P(TP),inorganic-P(IP),and organic-P(Org-P),and the ratio of iron-bound P(Fe-P)/calcium-bound P(Ca-P)in the sediments decreased with the increasing distance from the sampling site to the *** is probably due to the flocculant materials,e.g.,ferric and aluminous salts,usually being added in the wastewater treatment *** concentration of ammonia in the sediment porewaters significantly decreased with the increasing distance from the sampling site to the *** concentrations of total nitrogen and nitrogen in the sediment porewaters decreased to some content with the increasing distance from the sampling site to the ***,the concentrations of nitrate,dissolved total P(DTP),and TP did not have strong relationship with the distances from the sampling sites to the *** load and water quantity also had an important influence on the concentrations of P in sediments and its interstitial water in estuary sedimentary area.

关键词： estuary sedimentary area phosphorus(P) spatial distribution human activity the Dianchi Lake

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Control concept and countermeasures for shallow lakes’eutrophication in China

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Frontiers of Environmental Science & Engineering 2008年第3期2卷 257-266页

作者： xiangcan jin Shaoyong LU Xiaozhen HU Xia JIANG Fengchang WU State Environmental Protection Key Laboratory for Lake Pollution Control Research Center of Lake EnvironmentChinese Research Academy of Environmental SciencesBeijing 100012China

Research on lake eutrophication in China began in the early 1970s,and many lakes in China are now known to be in meso-eutrophic *** eutrophication has been showing a rapidly increasing trend since *** show that the main reasons for lake eutrophication include a fragile lake background environment,excessive nutrient loading into lakes,excessive human activities,ecological degeneration,weak environmental protection awareness,and lax lake *** mechanisms resulting from lake eutrophication include nutrient recycling imbalance,major changes in water chemistry(pH,oxygen,and carbon),lake ecosystem imbalance,and algal prevalence in *** concepts for controlling eutrophication should be persistently proposed,including lake catchment control,combination of pollutant source control with ecological restoration,protection of three important aspects(terrestrial ecology,lake coast zone,and submerged plant),and combination of lake management with *** to control lake eutrophication should include pollution source control(i.e.,optimize industrial structural adjustments in the lake catchment,reduce nitrogen and phosphorus emission amounts,and control endogenous pollution)and lake ecological restoration(*** a zone-lake buffer region and lakeside zone,protect regional vegetation,utilize hydrophytes in renovation technology);countermeasures for lake management should include implementing water quality management,identifying environmental and lake water goals,legislating and formulating laws and regulations to protect lakes,strengthening publicity and the education of people,increasing public awareness through participation in systems and mechanic innovations,establishing lake region management institutions,and ensuring implementation of governance and management measures.

关键词： China lake eutrophication control concept and countermeasures

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Current status and future tendency of lake eutrophication in China

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Science China(Life Sciences) 2005年第Z2期48卷 948-954页

作者： jin xiangcan, XU Qiujin & HUANG Changzhu Chinese Research Academy of Environmental Sciences, Beijing 100012, China Chinese Research Academy of Environmental Sciences Beijing China

Current trophic status and trend of Chinese freshwater lakes were investigated in this study. The results showed that all lakes studied were commonly undergoing the eutrophication process, water quality decreased and lake's ecosystem is being declined. Most of the urban lakes are facing serious eutrophication. Many medium-sized lakes are in metrophic or eutrophic status, some local water are even approaching the hypertrophic level. The famous five freshwater lakes in China have entered into eutrophication in the condition of higher nutrient load. Lake Taihu, Hongze and Caohu are already in eutrophic state. Eutrophic lakes are mainly distributed in the middle and lower reaches of Yangtze River and Yungui plateau. Lake eutrophication developed rapidly. Among the 34 lakes studied in 1970's, most of lakes were in the mesotrophic status,mesotrophic water area accounted for 91.8%. With the nine year of 1978-1987 the area percentage of oligotrophic lakes decreased from 3.2% to 0.53%, and that of eutrophic lakes increased from 5.0% to 55.01%. Recent data showed 57.5% lakes were in eutrophic and hypertrophic status of the 40 surveyed *** trend of Lake Taihu, Chaohu and Xuanwu in the region of the middle and lower reaches of Yangtze River was predicated using the ecological stress model. The results showed that in 2008 Lake Taihu, Chaohu and Xuanwu might be of eutrophication, eutrophication and hypertrophication, respectively if no control measurement is taken. Provided the pollution water treatment rate is 60% in 2030, approximately 30 billion ton pollution water would still be discharged directly in the lakes. Therefore, in 2030 the urban lakes in China might be eutrophication or hypertrophication, and most of the medium-sized lakes at the urban-rural fringe might be in eutrophication or hypertrophication. The famous five biggest freshwater lakes in China might be eutrophication if control countermeasures are taken as *** eutrophication has become a serious

关键词： Lake trophic status eutrophication prediction China.

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Seasonal variations of adsorption/desorption equilibrium concentrations of P at water-sediment interface in the Meiliang Bay, Taihu Lake, China

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Chinese Journal Of Geochemistry 2006年第B8期25卷 164-165页

作者： Xia JIANG xiangcan jin Dongmei LIU State Key Laboratory of Environmental Protection andLake Pollution Control China Research Center of Lake Environment Chinese Research Academy of Environmental Science Beijing 100012 China College of Environment and Resource Jilin University Changchun 130026China

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湖泊富营养化研究中的主要科学问题——代“湖泊富营养化研究”专栏序言

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环境科学学报 2008年第1期28卷 21-23页

作者：金相灿国家环境保护湖泊污染控制重点实验室/中国环境科学研究院湖泊环境创新基地北京100012

湖泊富营养化是我国湖泊当前面临的最为突出的环境问题之一,入湖生源要素循环失衡,蓝藻水华暴发与成灾机理,湖泊水生态系统退化与修复机制,以及湖泊管理科学基础等均是我国湖泊富营养化防治研究中急待解决的科学问题与理论基础.

关键词：湖泊富营养化蓝藻水华生态修复

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Influence of solidification agent and perturbance on the phosphorus release from sediment of Dianchi Lake

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Chinese Journal Of Geochemistry 2006年第B8期25卷 134-135页

作者： Shaoyong LU Weiguang XIN xiangcan jin Xiaozhen HU Lili LIANG Research Center of Lake Environment Chinese Research Academy of Environmental Sciences State Environmental Protection Key Laboratory for Lake Pollution Control Beijing 100012 China

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Water Environment Science and Technology Development

Water Environment Science and Technology Development

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作者： jin xiangcan Jiang Xia Wang Shengrui Xu Qiujin Hu Xiaozhen

This report consists of four major parts including lake, river, groundwater and city water environment mechanism research and control technologies, summa- rizes the current situation and developing trend of the resear...

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Spatial distribution of nitrification and denitrification rates of sediment in Wenruitang River, Wenzhou, China

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Chinese Journal Of Geochemistry 2006年第B8期25卷 20-21页

作者： Shaoyong LU xiangcan jin Jianning GUO Qingyun BU Feipen YANG Xiping CHEN Yuye YAO Research Center of Lake Environment Chinese Research Academy of Environmental Sciences State Environmental Protection Key Laboratory for Lake Pollution Control Beijing 100012 China Department of Environment Engineering Jilin Architectural and Civil Engineering Institute Changchun 130021 China Headquarters of River Wenruitanghe Regulation Project Wenzhou 404042 China

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不同粒径方解石在不同pH值时对磷的等温吸附特征与吸附效果

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环境科学学报 2008年第9期28卷 1872-1877页

作者：赵雪松胡小贞卢少勇金相灿盛力吉林建筑工程学院长春130021 中国环境科学研究院北京100012

以天然方解石为材料,研究了不同pH值与不同粒径方解石对磷吸附效果的影响.实验设置了不同质量浓度磷系列溶液,加入1g不同粒径,即小于100目、100-180目、180-325目和325目的方解石,在pH值分别为9.00±0.02、7.00±0.02和6.00±0.02时,研... 详细信息

以天然方解石为材料,研究了不同pH值与不同粒径方解石对磷吸附效果的影响.实验设置了不同质量浓度磷系列溶液,加入1g不同粒径,即小于100目、100-180目、180-325目和325目的方解石,在pH值分别为9.00±0.02、7.00±0.02和6.00±0.02时,研究方解石对磷的吸附效果,并用Langmuir模型和Freundlich模型对等温吸附线进行了拟合.结果表明,方解石对磷的吸附等温线能较好地用Freundlich方程来拟合.方解石的粒径越小,对磷的吸附能力越强,在本实验选取的粒径范围内,325目方解石对磷酸盐的吸附效果最好;但180-325目方解石对磷的吸附能力与325目方解石的差别不大,实际应用中,选用180-325目方解石即可取得对磷的较好的吸附效果.pH值是影响方解石吸附磷的重要因素,pH为6时,由于方解石微溶产生的Ca^2＋与水体中PO4^3-结合形成Ca-P化合物,使其吸附磷效果较好;pH≥7时,通过方解石吸附作用、与碳酸钙共沉作用及以方解石作为结晶核的钙磷化合物结晶作用去除磷;pH为9时方解石对PO43-吸附效果好于pH值为7时.

关键词：方解石 pH值磷粒径吸附特征

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