In situ soil treatments to reduce the phyto- and bioavailability of lead, zinc, and cadmium.
In situ soil treatments to reduce the phyto- and bioavailability of lead, zinc, and cadmium.
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DOI：
10.2134/jeq2004.5220
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发表时间：
2004-03
影响因子：
2.4
通讯作者：
Sally Brown;R. Chaney;J. Hallfrisch;J. A. Ryan;W. R. Berti
中科院分区：
文献类型：
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作者：
Sally Brown;R. Chaney;J. Hallfrisch;J. A. Ryan;W. R. Berti
一项研究是建立在前锌铅冶炼厂附近，以测试土壤改良剂的能力，以减少铅，锌，镉原位的可用性。从田间采集的土壤在实验室中以1% P-H_3 PO_4添加磷，10%生物固体堆肥添加（下文称为“堆肥”），和高铁副产品（以下简称“Fe”）+重过磷酸钙（TSP）（2.5% Fe + 1% P-TSP）并在实验室条件下培养，在恒定的土壤pH值。铅的生物有效性的变化进行了测定，在体外试验和喂养研究，刚断奶的老鼠使用体外提取物和高羊茅（高羊茅）（Festuca arundinacea Schreb. CV.肯塔基州-31）金属浓度。所有参数均观察到降低，但不一致。在饲养研究中，与对照土壤相比，1% P-H3 PO 4和堆肥处理导致大鼠组织铅浓度降低26%。2.5% Fe + 1% P-TSP显示出39%的降低。1% P-H3 PO 4处理导致最大的减少，在体外可提取的铅从现场样品（pH 2.2）与测量减少66%，而堆肥处理有39%的减少和2.5%Fe +1% P-TSP处理减少50%。在体外提取（pH 1.5）运行在现场样品显示没有减少堆肥或铁处理。1% P-H3 PO 4处理对植物Pb、Zn、Cd的还原效果最好。
A study was established near a former Zn and Pb smelter to test the ability of soil amendments to reduce the availability of Pb, Zn, and Cd in situ. Soil collected from the field was amended in the lab with P added as 1% P-H3PO4, biosolids compost added at 10% (referred to hereafter as "compost"), and a high-Fe by-product (referred to hereafter as "Fe") + P-triple superphosphate (TSP) (2.5% Fe + 1% P-TSP) and incubated under laboratory conditions at a constant soil pH. Changes in Pb bioavailability were measured with an in vitro test and a feeding study with weanling rats. Field-amended and incubated soils using these plus additional treatments were evaluated using the in vitro extraction and tall fescue (Festuca arundinacea Schreb. cv. Kentucky-31) metal concentration. Reductions were observed across all parameters but were not consistent. In the feeding study, the 1% P-H3PO4 and compost treatments resulted in a decrease of 26% in rat tissue Pb concentration compared with the control soil. The 2.5% Fe + 1% P-TSP showed a 39% decrease. The 1% P-H3PO4 treatment caused the greatest reduction in in vitro extractable Pb from field samples (pH 2.2) with a measured reduction of 66%, while the compost treatment had a 39% reduction and the 2.5% Fe + 1% P-TSP treatment a 50% reduction. The in vitro extraction (pH 1.5) run on field samples showed no reduction in the compost or Fe treatments. The 1% P-H3PO4 treatment was the most effective at reducing plant Pb, Zn, and Cd.