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土壤样品采集是土壤生态环境监测工作开展的基础,规范准确的土壤样品采集技术是土壤生态环境监测结果准确性的重要保证,对准确获得兼具代表性和典型性的土壤样品起到决定性的作用。结合工作经验,对甘肃省基层生态环境监测工作的两种情形,即土壤生态环境监视性监测和突发环境污染事故土壤生态环境监测的土壤样品采集技术做简要分析,对基层生态环境监测部门委托第三方检测机构采集样品应当注意的要点进行探讨,并就当前生态环境监测工作与生态环境执法部门有效衔接提出建议。 相似文献
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方差分析在样品采集质量控制过程中的应用 总被引:1,自引:0,他引:1
在样品采集质量控制过程中,用方差分析将系统误差与偶然误差以数量的形式分开,从中找出引起误差的主导原因,并使用F检验来判断引起误差的因素对采样结果有无严重影响。经验证,该方法应用结果可靠。 相似文献
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土壤污染修复环境监理技术规范在土壤修复工程中起着至关重要的作用,是衡量环境监理报告是否规范的主要判据。通过对已经颁发的8部土壤污染修复环境监理技术规范、指南的综合分析,结合近年来的相关研究,对土壤污染修复环境监理技术规范的现状进行评述,并对今后的发展予以展望。 相似文献
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Soil pollution due to heavy metals is widespread; on the world scale, it involves about 235 million hectares. The objectives
of this research were to establish the uptake efficiency of nickel by some agricultural crops. In addition, we wanted to establish
also in which part of plants the metal is stored for an eventual use of biomass or for recycling the metal. The experiments
included seven herbaceous crops such as: barley (Hordeum vulgaris), cabbage (Brassica juncea), spinach (Spinacea oleracea), sorghum (Sorgum vulgare), bean (Phaseolus vulgaris), tomato (Solanum lycopersicum), and ricinus (Ricinus communis). We used three levels of treatment (150, 300, and 600 ppm) and one control. At the end of the biological cycle of the crops,
the different parts of plants, i.e., roots, stems, leaves, fruits, or seeds, were separately collected, oven dried, weighed,
milled, and separately analysed. The leaves and stems of spinach showed a very good nickel storage capacity. The ricinus too
proved to be a very good nickel storer. The ability of spinach and ricinus to store nickel was observed also in the leaves
of cabbage, even if with a lower storage capacity. The bean, barley, and tomato, in decreasing order of uptake and storage
capacity, showed a high concentration of nickel in leaves and stems, whereas the sorghum evidenced a lesser capacity to uptake
and store nickel in leaves and stems. The bean was the most efficient in storing nickel in fruits or grains. Tomato, sorghum,
and barley have shown a storage capacity notably less than bean. The bean appeared to be the most efficient in accumulating
nickel in the roots, followed in decreasing order by sorghum, ricinus, and tomato. With regard to the removal of nickel, spinach
was the most efficient as it contains the highest level of this metal per gram of dry matter. The ricinus, cabbage, bean,
sorghum, barley, and tomato evidenced a progressively decreasing efficiency in the removal of nickel. 相似文献
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污染水体的原位生物修复研究初探 总被引:4,自引:0,他引:4
采用环境友好型生物激活剂-BZ对某受污染水体进行静态修复试验,结果表明,BZ剂的加入可以促进水体中污染物CODCr、NH3 N和TP的降解。在不曝气的条件下,当BZ剂投加量为4 0mg/L·d时,对水质的净化效果最好,投加10天后,水样中CODCr、NH3 N和TP的降解率分别为23 8%、78 2%和23 9%。在曝气条件下,以上指标的变化规律和降解率与没有曝气时基本相近。在有/无曝气条件下,BZ剂加入均会使水样的pH值略为增高,且其对NH3 N降解的促进作用最为显著。 相似文献
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重金属污染土壤的修复方法及其在几类典型土壤修复中的应用 总被引:3,自引:0,他引:3
文中首先阐述了重金属污染土壤的途径与特点。介绍了当前几类主要的重金属污染土壤修复方法:物理化学方法、植物修复法、微生物修复法、动物修复法等的技术要点,详述了各自的技术特点及机理,并对它们的修复效能、环境友好性等进行了比较。从土壤的特性出发,区分出了3种典型的遭受重金属污染的土壤:农业土壤、城市土壤、矿区土壤,并从国内外最新的重金属污染修复实践中选取了适合各自土壤类型的修复方法进行了重金属污染土壤的治理探讨。最后,对土壤重金属污染修复技术的发展进行了展望。 相似文献
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