Brown Sally, Chaney Rufus, Hallfrisch Judith, Ryan James A, Berti William R
College of Forest Resources, University of Washington, Seattle, WA 98195, USA.
J Environ Qual. 2004 Mar-Apr;33(2):522-31.
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.
在一个 former Zn 和 Pb 冶炼厂附近开展了一项研究，以测试土壤改良剂原位降低 Pb、Zn 和 Cd 有效性的能力。从田间采集的土壤在实验室中进行改良，添加 1% 的 P-H3PO4 作为 P、添加 10% 的生物固体堆肥（以下简称“堆肥”），以及一种高铁副产品（以下简称“Fe”）+ 重过磷酸钙（TSP）（2.5% Fe + 1% P-TSP），并在实验室条件下于恒定土壤 pH 值下进行培养。通过体外试验和对断奶大鼠的喂养研究来测量 Pb 生物有效性的变化。使用这些处理方法以及其他额外处理对田间改良和培养后的土壤进行评估，通过体外提取和高羊茅（Festuca arundinacea Schreb. cv. Kentucky-31）的金属浓度进行评估。所有参数均观察到了降低，但并不一致。在喂养研究中，与对照土壤相比，1% P-H3PO4 和堆肥处理使大鼠组织中的 Pb 浓度降低了 26%。2.5% Fe + 1% P-TSP 处理显示降低了 39%。1% P-H3PO4 处理使田间样品（pH 2.2）中体外可提取的 Pb 降低幅度最大，测量到的降低幅度为 66%，而堆肥处理降低了
