Results 21 to 30 of about 1,079 (175)

Effect of nanoscale hydroxyapatite on soil adsorption and desorption of heavy metals(纳米羟基磷灰石对土壤重金属吸附与解吸特性的影响)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2015
采用纳米羟基磷灰石(nano-HAP)对安吉(AS)和华家池(HS)的土壤进行重金属吸附-解吸实验.结果表明,土壤对重金属的吸附均可用Langmuir方程描述,重金属在土壤中的亲和力顺序:Pb( Ⅱ )>Cu( Ⅱ )>Cd(Ⅱ)> Zn(Ⅱ). AS的pH值、土壤有机质(OM)含量和阳离子交换量(CEC)均高于HS,因此具有更强的吸附性能.nano-HAP的施加显著增加了土壤对重金属的吸附量和吸附亲和力,nano-HAP添加量为3%时,AS和HS的KCu值分别从0.979 1和0.284 9提高至1 ...
FENGJiabei(冯佳蓓)   +1 more
doaj   +1 more source

On the distribution, speciation and bioavailability of heavy metals in the soils at Xiang'an, Xiamen, China [PDF]

open access: yes, 2008
土壤重金属化学行为与环境质量的研究是土壤圈物质循环研究的重要组成部分。随着区域社会经济的快速发展,土壤重金属的污染问题日益凸显,直接关系到土壤质量和人类生存质量。翔安区是厦门市重点农田保护区域,是厦门基础农业生产基地。本论文通过对厦门翔安区土壤重金属的分布、形态的研究,旨在全面评估翔安区土壤重金属的现状及其潜在生态效应。基于对翔安区土壤重金属全量的测定,分析了翔安区土壤重金属含量及分布特征,并与1990年全国土壤普查数据进行了比较,结果表明该区域土壤重金属含量相对于1990年,均有所增加 ...
邱海源
core  

Distribution Characteristics, Ecological Risks, and Source Identification of Heavy Metals in Cultivated Land in Xingyang City [PDF]

open access: yes
The quality of arable land is closely related to people’s livelihoods, and heavy metals are one of the significant factors affecting arable land quality.
Xinlei ZHAO   +3 more
core   +1 more source

Heavy metal pollution enhances pathogen resistance of an invasive plant species over its native congener

open access: yesFunctional Ecology, Volume 39, Issue 4, Page 1096-1111, April 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Many invasive plant species have demonstrated a better ability to tolerate and accumulate heavy metals than their co‐occurring native plants. Given the potential biological toxicity of heavy metals to phytopathogens, we postulated that heavy metal contamination could ...
Tiantian Lin   +7 more
wiley   +1 more source

铅锌矿区污染土壤微生物活性研究

open access: yesShuitu Baochi Xuebao, 2006
通过野外调查和采样分析,研究了浙江衢州铅锌矿区土壤的微生物、土壤酶活性及植物重金属积累特性。结果表明:矿区污染区土壤Ph、Zn、Cd、Cu全量的平均值分别是对照土壤的267.8倍、132.6倍、41.8倍、17.0倍。矿区植物体内重金属含量与土壤重金属全量和有效态含量呈显著正相关。矿区土壤随着重金属含量的增加,土壤微生物生物量碳逐渐降低,而土壤基础呼吸、微生物代谢商则升高,矿区中心污染土壤微生物生物量碳只有对照土壤的72%,而基础呼吸和微生物代谢商分别是对照土壤的1.6倍和2.3倍 ...
张玲, 叶正钱, 李廷强, 杨肖娥
doaj   +2 more sources

不同季节垃圾填埋场周围重金属污染特征及评价 [PDF]

open access: yes, 2018
采集漳州市某生活垃圾填埋场周围冬夏两季的地表水(包括渗滤液)、土壤以及植物样品,分析9种重金属总量的季节性变化.结果表明,冬季地表水中Zn和As,土壤和植物中的Cd和As的含量均大于夏季,而夏季波动性强于冬季;夏季渗滤液中总Hg的含量明显高于冬季,其余变化不明显.地表水重金属含量均低于地表水环境质量Ⅴ类标准限值,渗滤液中所有重金属含量均低于污水排放二级标准限值.土壤中重金属Cd、As和Pb的污染最重,已达到重度污染,冬季的污染明显高于夏季.冬季植物富集能力强于夏季,细叶芒对Cd的富集能力较强 ...
于珍凤   +5 more
core  

电化学方法在土壤重金属检测中的研究

open access: yes生态环境与保护, 2019
针对现有检测土壤重金属的方法存在设备成本高、操作过程复杂、限制条件多导致检测效率较低的问题,本文基于离子化合物的本质,研究利用电化学方法对土壤中的重金属铜进行检测,机理表明,本文面向土壤中铜金属的检测方法可行,操作过程相对简单,并且能实现对铜的定量,有利于提高该方面的检测效率。
颖聪 邝
semanticscholar   +1 more source

Enrichment of Heavy Metals by Casuarina equisetifolia of Different Stand Ages [PDF]

open access: yes, 2016
为认识木麻黄(Casuarina equisetifolia)防护林带重金属消减效应,利用电感耦合等离子体质谱(ICP-MS)测定了福建省平潭国有防护林场林龄分别为5,15,20,30年的木麻黄小枝、细根、凋落物及林地土壤中5种重金属(Cr、Cu、Zn、Cd和Pb)的含量.结果表明:平潭木麻黄林地土壤重金属Cr、Cu、Zn、Pb、Cd含量均低于福建省土壤和福建海岸带土壤的重金属含量背景值,未发现重金属污染;木麻黄Cr、Cd和Zn的平均含量高出普通植物的正常值范围,木麻黄中重金属含量依Zn>Cr>Pb ...
丁振华   +4 more
core  

Application of Energy Dispersive X-ray Fluorescence Spectroscopy in Analysis of Heavy Metals in Soil: A Review [PDF]

open access: yes
With the process of urbanization and industrialization, heavy metals enter the ecological environment through various pathways and accumulate in large quantities in the soil, causing potential risks to soil environmental health. In recent years, with the
Aosong JIANG, Longhua WU, Zhu LI
core   +1 more source

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