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首页> 外文会议>International Conference on the Biogeochemistry of Trace Elements >The effect of flue gas desulfurization residue on corn (Zea mays L.) growth and leachate salinity: multiple season data from amended mesocosms
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The effect of flue gas desulfurization residue on corn (Zea mays L.) growth and leachate salinity: multiple season data from amended mesocosms

机译：烟道气脱硫残留对玉米（Zea Mays L.）生长和渗滤液盐度的影响：修正的中科科姆的多季度数据

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The environmental effects of applying a weathered flue gas desulfurization residue (FGD) to soil was monitored in a mesocosm experiment conducted over several cropping periods. Dry biomass and elemental composition of crop plants were measured, as well as the quality and chemical composition of soil and leachate collected from treated mesocosms. Data collected in the first year following FGD amendment showed no effect on the germination of corn (Zea mays L. var Dekalb DK-683), soybean (Glycine max L. Merr. Var. Haskell Pupa 94), radish (Raphanus sativus L. var. Sparkler), and cotton (Gossypius hirsutus L. var. Deltapine 51) and a significant stimulation in biomass. Metal and metalloid enrichment of plant tissues, specifically As, B, Se and Mo was also significant. Application of FGD residue drastically altered the pH of the soil and the salinity of the leachate. Studies were continued into a second season to monitor the duration of beneficial and deleterious effects arising from FGD amendment, as it is expected that the majority of environmental effects will occur in the initial season following application. Second season data using a monoculture of com showed no significant stimulation or inhibition of biomass, in contrast to findings of the initial year. Concentrations of metals and metalloids within plant tissues in the second season were lower, although still elevated above control concentrations. Electrical conductivity of mesocosm leachate; elevated from a control level of 0.05 dS m~(-1) to 3.4 dS m~(-1) with addition of 100 tons FGD'acre~(-1), was still elevated 550 days after application. Repeated monitoring of leachate salinity showed evidence of only a slight decline 928 days after application. Soil data collected at the end of the second growth season showed that Se concentration had fallen below detection limits, and levels of As had also fallen by approximately 29%. The duration of environmental effects from FGD residue application can be summarized in terms of their half-lives, i.e, the length of time required for a 50% reduction in altered environmental parameters toward control levels. When half-lives for plants, soil and leachate are compared, the increase in soil pH and leachate salinity have the longest half-lives, and stimulation of plant biomass the shortest.
机译：在几种种植期进行的Mesocosm实验中监测将风化的烟道气脱硫残留物（FGD）应用于土壤的环境效应。测量干生物量和作物植物的元素组成，以及从处理的中间体核糖中收集的土壤和渗滤液的质量和化学成分。在FGD修正案后第一年收集的数据对玉米的萌发没有影响玉米（Zea Mays L.Varb DK-683），大豆（Glycine Max L. Merr.var。Haskell Pupa 94​​），萝卜（Raphanus sativus L. var。烟火）和棉花（Gossypius hirsutus l. var。三角素51）和生物量的显着刺激。植物组织的金属和金属富集，具体如此，B，Se和Mo也显着。 FGD残留物的应用急剧改变了土壤的pH和渗滤液的盐度。继续研究第二季，以监测FGD修正案所产生的有益和有害影响的持续时间，因为预计在申请后的初始季节将发生大部分环境影响。使用COM单一栽培的第二季数据显示出对生物量的显着刺激或抑制，与最初的一年的结果相反。植物组织中的金属和金属浓度较低，但仍仍升高到上述对照浓度。 Mesocosm渗滤液的电导率;加入100吨FGD'Acre〜（-1）的控制水平从0.05 ds m〜（-1）至3.4ds m〜（-1）升高，仍仍在施用后550天升高。重复监测渗滤液盐度显示申请后928天的略微下降的证据。在第二次生长季结束时收集的土壤数据表明，SE浓度低于检测限，水平也下降约29％。 FGD残留申请的环境影响的持续时间可以在其半衰期方面总结，即50％降低的环境参数对控制水平的50％所需的时间长度。当比较植物，土壤和渗滤液的半衰期时，土壤pH和渗滤液盐度的增加具有最长的半衰期，并且刺激植物生物量最短。

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