Results 11 to 20 of about 1,079 (175)
, 2020 随着我国国民经济的增长,我国在发展过程中的土壤重金属污染问题也较为严重。重金属污染和其他污染问题相比较,其污染范围较广,且对于人类健康以及环境的危害较大,因此,近几年来,土壤重金属污染问题逐渐受到了我国政府和国民的重视。基于此,下文就土壤重金属污染现状、原因、危害及修复方面进行了简单分析,希望对我国的重金属土壤污染问题的治理工作起到一定的借鉴作用。
吴 施萌
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Geochemical Characteristics and Environmental Risk Assessment of Heavy Metals in Weathering Profiles of Alkali-enriched Porphyry in Central Yunnan [PDF]
, 2023 BACKGROUNDThe contents of many heavy metals in soil in many areas of southwest China are much higher than the national soil background value, and related studies show that most heavy metals in soil are in a state of “high background and low activity ...
Fangping WEN +10 more
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Phytoaccumulation of heavy metals by terrestrial plants around vanadium smelters [PDF]
, 2016 Twenty-nine species samples of higher plants which belong to twenty families and seven soil samples were collected from a vanadium smelter. The contents of heavy metals in the native plants and soil were analyzed by ICP-MS and ICP-OES.
CHEN Si +5 more
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Zhejiang Daxue xuebao. Lixue ban, 2010 以城市污泥为主要成分,添加不同比例的单一辅料(草炭、磷矿粉、粉煤灰)配成不同的城市污泥人工土壤,研究各配比人工土壤中重金属生物有效性和综合毒性,并揭示人工土壤中重金属向黑麦草的动态迁移.结果表明：各配比人工土壤中重金属生物有效性和综合毒性均较污泥明显下降；当粉煤灰添加比例为20%时,人工土壤中Cu、Zn、Pb、Ni生物有效态含量下降最多,分别为28.75%、36.09%、34.85%和36.52%,此时,重金属综合毒性指数降幅最大,为2.7×10-3；与污泥相比 ...
XUZhen-lan(许振岚), CHENHong(陈红)
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Cadmium Bioavailability Based on Diffusive Gradients in Thin Films Technique and Conventional Chemical Extraction in High Geological Background Soil Area of Northwestern Zhejiang Province, China [PDF]
, 2023 BACKGROUNDHigh geochemical background has a greater impact on soil Cd pollution than human activities and is more detrimental to the environment and human health on a regional level. Research shows that the bioavailability of Cd in soil is the key factor
Binbin SUN +6 more
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Shuitu Baochi Xuebao, 2007 以山东某矿区为例,通过淋溶模拟实验,研究了煤矸石中重金属的淋溶规律,并探讨了煤矸石山周边土壤重金属污染特征.结果表明:风化矸石淋滤液中的Zn、Pb、Cr和Cu浓度较高,并很快稳定;新鲜矸石在淋溶初期检出Zn,其它重金属元素没有检出;风化矸石淋滤液中重金属的含量要高于未风化矸石.矸石山周边表层土壤中的Zn、pb、Cr和Cu较高,且浓度高出矸石淋溶液许多倍,表明煤矸石中重金属淋滤具有长期性,矿区土壤对重金属具有迁移性和富集性.表层土壤重金属含量随着距煤矸石堆的距离增加而呈明显的下降趋势 ...
张明亮, 王海霞
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生态环境与保护, 2019 土壤重金属Pb元素对农作物和生物有很大的危害,而现有的常用检测方法效率不高、体积庞大以及价格昂贵。本文对已有的电化学检测土壤重金属的方法进行改良,加入超声波手段,加速土壤样本的可溶物在溶液中的溶解与混合,利用Bi丝网印刷电极传感器与差分脉冲阳极溶出伏安法相结合,使得在满足检测精度的时候对土壤中的重金属Pb元素快速高效检测。
汉栩 冯
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生态环境与保护, 2020 人类是生活在地球上的生物,所以我们生存发展就都离不开土壤。随着时代的发展和科学技术的不断进步,人民的生活水平也得到了大幅度的提高,人们进行生存活动和科研活动的范围也越来越大。而伴随着这一情况,重金属被越来越多的排放到了土壤之中。这些重金属不但在土壤中“生根发芽”还渗入到了土壤种植里的瓜果蔬菜当中,并且还对粮食等农作物的食品安全产生了威胁,对人民群众的生活质量和身体健康产生了很大的负面影响。针对这一情况,我们必须要对土壤进行重金属监测。本文我们针对土壤重金属的检测技术发展现状进行研究 ...
健 朱
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Risk assessment of heavy metals in the soil of an abandoned coal mine area [PDF]
During the coal mining process, a large amount of waste such as coal gangue and coal washing water is generated. The heavy metal pollutants in those wastes migrate and diffuse into the surrounding soil and water environment through sedimentation, runoff,
Jia LIU +6 more
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工程建设, 2021 文章将详细介绍土壤内重金属镍的来源，通过专业的研究与调查，找出适宜的重金属镍的分析方法，如原子吸收法、发射光谱法、等离子质谱法及石墨消解分析法等，从而增强土壤内部重金属镍的分析水平。
红丽 李
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