Heavy metal immobilization by chemical amendments in a polluted soil and influence on white lupin growth
Heavy metal immobilization by chemical amendments in a polluted soil and influence on white lupin growth
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DOI：
10.1016/j.chemosphere.2004.11.098
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发表时间：
2005-07-01
期刊：
影响因子：
8.8
通讯作者：
Melis, P
中科院分区：
文献类型：
--
作者：
Castaldi, P;Santona, L;Melis, P
研究了化学改良剂(沸石、堆肥和氢氧化钙)对铅、镉、锌在污染土壤中溶解度的影响。被污染的土壤来自意大利撒丁岛西南部。铅(19663 mg kg(-1)D.M.)、Cd(196mgkg(-1)D.M.)总含量很高。锌(14667 mg kg(-1)D.M.)。白羽扇豆(Lupinus albus L.，cv.)在温室条件下的盆栽试验中也进行了研究。结果表明，与未改性对照相比，改良剂提高了土壤中重金属的残留量，降低了白羽扇豆对重金属的吸收。在三种改良剂中，堆肥和Ca(OH)(2)对降低植物对铅和锌的吸收最有效，沸石对植物对Cd的吸收最有效。白羽扇豆在改良土壤中的生长优于未改良对照。与未改性土壤相比，地上部生物量增加了1.8倍(沸石改良土壤)、3.6倍(堆肥改良土壤)和3.1倍(氢氧化钙改良土壤)。根生物量增加了1.4倍(沸石改良土壤)、5.6倍(堆肥改良土壤)和4.8倍(氢氧化钙改良土壤)。结果表明，土壤化学处理通过降低土壤中金属的生物有效性来改善作物的生产性能。然而，如果能找到这些改良剂的合适混合物来同时固定污染土壤中的三种主要污染物，那将是一件有趣的事情。(C)2005爱思唯尔有限公司。保留所有权利。
The effects of chemical amendments (zeolite, compost and calcium hydroxide) on the solubility of Pb, Cd and Zn in a contaminated soil were determined. The polluted soil was from the Southwest Sardinia, Italy. It showed very high total concentrations of Pb (19663 mg kg(-1) d.m.), Cd (196 mg kg(-1) d.m.) and Zn (14667 mg kg(-1) d.m.). The growth and uptake of heavy metals by white lupin (Lupinus albus L., cv. Multitalia) in amended soils were also studied in a pot experiment under greenhouse conditions. Results showed that the amendments increased the residual fraction of heavy metals in the soils, and decreased the heavy metals uptake by white lupin compared with the unamended control. Among the three amendments, compost and Ca(OH)(2) were the most efficient at reducing Pb and Zn uptake, while zeolite was the most efficient at reducing Cd uptake by the plants. White lupin growth was better in amended soils than in unamended control. The above ground biomass increased with a factor 1.8 (soil amended with zeolite), 3.6 (soil amended with compost) and 3.1 (soil amended with Ca(OH)(2)) with respect to unamended soil. The roots biomass increased with a factor 1.4 (soil amended with zeolite), 5.6 (soil amended with compost) and 4.8 (soil amended with Ca(OH)(2)).Results obtained suggest that the soil chemical treatment improved the performance of crops by reducing bioavallability of metals in the soils. However it would be therefore interesting to find a suitable mixture of these amendments to contemporarily immobilize the three main pollutants in the polluted soils. (c) 2005 Elsevier Ltd. All rights reserved.