Results 41 to 50 of about 18,362 (168)
Shuitu Baochi Xuebao, 2011 对猪粪有机肥中胶体态重金属的分布进行了定量分析。结果表明,水提取态Cu、Zn、Fe、Mn主要以胶体态存在,Ni、Cr、Cd、As几乎都以可溶态存在。胶体态Cu在0.02~0.2μm胶体中的含量最高,胶体态Zn、Fe、Mn在粒径为1~10μm的大粒径胶体中含量最高。在长期连续施用有机肥引起重金属积累的土壤中,高Cu负荷的小粒径胶体可能会引起深层土壤中重金属积累问题,胶体态有机碳与可溶态有机碳对重金属结合能力的不同可能是导致重金属分布存在差异的重要原因 ...
保琦蓓 +7 more
doaj
Zhejiang 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
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Rare Metals, EarlyView.ABSTRACT The development of sodium‐ion batteries (SIBs) is limited by slow charge transfer kinetics and large material volume changes caused by the large radius of Na+. Leveraging the excellent physicochemical properties and unique heterostructures of metal selenides, ultrafine hetero‐CuFeSe2‐CoSe2 nanoparticles are in situ wrapped by ...
Ying Zhu +5 more
wiley +1 more source
Shuitu Baochi Xuebao, 2016 选择干旱区典型城市河流乌鲁木齐市水磨河为研究区，结合经典统计学与地统计学相关方法理论，研究了乌鲁木齐市水磨河沿岸土壤重金属含量的分布特征及其污染评价。结果表明：水磨河沿岸土壤重金属含量在土层深度上差异较小；从土地利用方式来看，人为活动明显干扰重金属在沿岸土壤分布中的含量变化，重金属元素间的相关关系在一定程度上反映着几种重金属的同源性与差异性；主成分分析表明，Cu和Zn为水磨河沿岸土壤特征重金属元素，且重金属因子负载图表明Cu和Zn含量存在多因素控制；从空间分布来看 ...
马辉英 +4 more
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Rare Metals, EarlyView.ABSTRACT The development of highly efficient and stable nonprecious metal electrocatalysts for the acidic oxygen evolution reaction (OER) is crucial to advance proton exchange membrane (PEM) water electrolysis. In this work, a dual synergistic strategy was proposed by constructing a Ce‐modified MnO2/MnO heterostructure.
Chuanbin Li +7 more
wiley +1 more source
Risk assessment for Indo-Pacific Humpback dolphin (Sousa chinensis) heavy metals exposure from ingestion of fish in the waters of Xiamen Bay [PDF]
, 2016 中华白海豚是我国唯一一级保护海洋鲸豚，被誉“海上国宝”，在闽、粤、 港、台地区还被誉为“妈祖鱼”。在我国主要分布在广西、海南、广东、香港、 澳门、福建、台湾、浙江沿岸，喜在沿岸河口浅水域活动。20世纪80年代以 来，随着我国海岸带开发利用活动的增加，中华白海豚受到人类活动的不利影响 加大。厦门海域是中华白海豚的重要栖息地之一，而近年来伴随着厦门经济的发 展，中华白海豚面临着巨大的环境压力，水体环境污染成为危害白海豚健康的主 要因素之一。对多只厦门海域搁浅的白海豚的研究发现，其体内已累积多种重金 属元素 ...
刘婉欣
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Rare Metals, EarlyView.ABSTRACT The past decade has witnessed a burgeoning demand of metals for global industrial development and infrastructure. Meanwhile, the depletion of mineral resources and the environmental damage caused by wastewater discharges pose significant threats to both economic and ecological sustainability. Fortunately, metal‐containing wastewaters also hold
Fei Zhang +6 more
wiley +1 more source
Shuitu Baochi Xuebao, 2008 采用振荡离心的方法研究了生物表面活性剂茶皂素在不同浓度、pH值和离子强度下对污染土壤中重金属去除效果的影响;并采用BCR法研究了茶皂素处理前后土样中各形态的重金属含量变化。试验结果表明:随着茶皂素浓度的增加,重金属的去除率随之增加,在茶皂素浓度为7%时,对供试土样中重金属的去除率达到最大值,去除率分别为Cd 96.36%,Zn 71.73%,Pb 43.71%,Cu 20.56%;随着土壤环境pH值的增加,重金属的去除率随之减少,适宜的pH范围在5.0左右;离子强度对Pb,Cu的去除效率影响不大,Zn ...
ZHANG Zhong-wen +4 more
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Surface Functionalization of Polymer Substrates through Radiation-Induced Graft Polymerization: Conventional and Controlled Polymerization Techniques [PDF]
, 2018 学位記番号 ...
Jordan F., Madrid +1 more
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Rare Metals, EarlyView.ABSTRACT Efficient and durable bifunctional electrocatalysts are vital for scalable water electrolysis. Here, we realize cobalt‐vacancy (Covac) engineering in CoFeP supported on N,P‐codoped carbon nanocages (Co1‐vacFeP/NPC) through a simple route comprising a CoFe Prussian blue analog precursor, phosphidation–pyrolysis, tannic‐acid etching, and a ...
Yuan‐Liang Yuan +6 more
wiley +1 more source