Results 11 to 20 of about 2,201 (145)

芦苇对白洋淀底泥重金属污染程度的影响效应研究

open access: yesShuitu Baochi Xuebao, 2006
取白洋淀底泥制成3种不同厚度的基质种植芦苇,另外设置不含底泥的麦地土壤和旱地芦苇土壤,定期对基质采样,测定底泥中重金属Cu,Cd,Pb,Zn浓度并进行比较分析。试验表明,底泥和供试麦地土壤和芦苇土壤已受到重金属Cu,Cd,Pb,Zn不同程度污染;Cd浓度均已超过全国土壤质量三级标准,分别为1.35~1.59mg/kg和1.078~1.16mg/kg,污染程度严重。其次为Pb和Zn,Cu为轻微污染。随着芦苇的生长,底泥和麦地及芦苇土壤中大部分重金属浓度呈不同程度下降趋势 ...
滑丽萍   +4 more
doaj   +2 more sources

海底堆積油の光学的検出手法の開発 [PDF]

open access: yes, 2016
東京海洋大学修士学位論文 平成26年度(2014) 海洋環境保全学 第2102号指導教員: 荒川久幸全文公表年月日: 2016-12 ...
戸口 和貴
core   +1 more source

Determination of eight volatile benzene series compounds in soil or sediment by headspace-gas chromatography(顶空气相色谱法测定土壤或底泥中的八种苯系物)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2013
为快速、准确监测环境土壤或底泥中苯系物的含量,建立了一种顶空气相色谱法同时测定土壤或底泥中8种苯系物的方法.采用Nukol毛细管气相色谱柱实现了各组分的良好分离,优化了色谱条件,顶空进样条件.在优化条件下,8种苯系物在13 min内能实现完全分离,在10~500 µg • kg-1浓度范围内组分含量与峰面积呈线性相关,相关系数为0.990 6~0.995 7,检出限为2 µg • kg-1,回收率为94%~114%,相对标准偏差为2.4%~5.2%(n =3).结果表明,建立的顶空气相色谱法简单快速 ...
HUHong-mei(胡红美)   +4 more
doaj   +1 more source

月湖底泥疏浚后底栖动物群落的恢复及其与环境的关系 [PDF]

open access: yes, 2012
研究对月湖底泥疏浚后底栖动物群落动态进行逐月的周年调查,并分析了底栖动物密度、生物多样性与环境因子的关系,结果表明:疏浚导致大型底栖动物基本消失,现存量从疏浚前的(4387±885)ind·m-2降低至(80±21)ind·m-2。疏浚后,寡毛类成为受干扰系统恢复过程中的先锋种类,在春季(4月)和秋冬之际(11月)出现2个密度高峰,分别为(1010±230)ind·m-2和(1538±408)ind·m-2,而摇蚊幼虫在疏浚一年后的秋冬季密度达到高峰(2021±612)ind·m-2 ...
周易勇   +4 more
core  

群馬・福島県境,尾瀬沼地域の珪藻 [PDF]

open access: yes, 2018
 Diatom investigations of the Lake Oze area, located on boundary of Gunma and Fukushima Prefectures, were carried out. Materials were collected from whole water, bottom mud and attached to water plants from Lake Oze as well as neighboring Konuma Pond ...
三橋 扶佐子   +3 more
core   +1 more source

Study on new concept of management for the sustainable use of the reservoirs in the surrounding of Sahara desert [PDF]

open access: yes, 2013
科学研究費助成事業(科学研究費補助金)研究成果報告書:基盤研究(B)2010-2012課題番号 ...
Irie Mitsuteru, 入江 光輝
core  

城市污泥与湖泊底泥土地利用对土壤-植物系统中养分及重金属Cd、Pb的影响

open access: yesShuitu Baochi Xuebao, 2006
采用田间小区试验,探讨了城市污泥与湖泊底泥土地利用对土壤-植物系统中养分及重金属Cd、Pb的影响。结果表明,城市污泥与湖泊底泥能有效增加土壤养分含量;重金属Cd、Pb仅累积在土壤耕层,难以向下迁移;随施用量的增加,小麦籽粒产量及其对养分的吸收量均随之增加,但仍有大量养分存留在土壤中;植株对重金属的富集顺序表现为根系〉茎叶〉籽粒,Cd〉Pb,其中,籽粒中重金属Cd、Pb含量均未超出我国食品中重金属限量的卫生标准;如果该污泥、底泥分别以100,200t/hm^2的施用量施入土壤 ...
付克强   +3 more
doaj   +2 more sources

Water Quality of L. Taihu in China and the Possibility of Water cleaning by Plant floating culture system -L. Wuli and L. Meiliang- [PDF]

open access: yes, 2001
The water quality of L.Wuli and L.Mei1iang of L. Taihu in China, and the possibility of water cleaning by plants floating culture system were examined.
Agata, Waichi   +4 more
core  

Study on the planar structure characteristics of mud diapirs in Rio del Rey basin , West Coast of Africa(非洲西海岸里奥-德雷盆地泥底辟平面地质结构特征研究)

open access: yesZhejiang Daxue xuebao. Lixue ban
The Rio del Rey basin, located in the eastern margin of the Niger Delta Basin in West Africa, develops large-scale mud diapirs. There are some disputes about the activity time and mechanism of the diapirs. Based on the detailed interpretation and mapping
廖天奇(LIAO Tianqi)   +1 more
doaj   +1 more source

Toxicity and Bioaccumulation of Hexabromocyclododecane (HBCD) in Tigriopus japonicus [PDF]

open access: yes, 2015
六溴环十二烷(Hexabromocyclododecane,HBCD,C12H18Br6)作为全球用量最多的三大溴代阻燃剂之一(另外两种是多溴联苯醚Polybrominateddiphenylethers,PBDEs和四溴双酚ATetrabromobisphenonalA,TBBPA),被广泛应用于纺织材料、电子产品和建筑绝热材料中,具有阻燃效果好、成本低等特点。由于HBCD本身的持久性有机污染物特性及其使用量的不断增加,由它产生的环境问题也逐渐引起科研工作者的关注。2013年5月,HBCD被正式列入 ...
吕冬梅
core  

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