Some science behind the scenes

Lead chelating plants

Any plant that upon analysis contains lead, when it has no need of that chemical itself is, by definition, capable of chelating the soil. 

The following list is from Dr Duke's phytochemical database and contains just some of the plants he found that contained lead upon analysis.  The implications are also clear, that it is not safe to eat these plants if they have been grown on contaminated land.

Once the chelation of the land is complete, they need to be disposed of safely, for example placed in a deep pit - an open cast mine for example or other deep hole in the ground - where they cannot resurface and where their contaminants are safely buried.

List of plants containing LEAD

SpeciesPartLo
ppm
Hi
ppm
Reference
Nyssa sylvatica MARSHALL [Cornaceae] Leaf 0.2 182 DUKE1992A
Symphoricarpos orbiculatus MOENCH. [Caprifoliaceae] Stem 2 176 DUKE1992A
Juniperus virginiana L. [Cupressaceae] Shoot 0.7 132 DUKE1992A
Nyssa sylvatica MARSHALL [Cornaceae] Stem 0.1 132 DUKE1992A
Prunus serotina subsp. serotina [Rosaceae] Stem 0.2 108 USG
Carya glabra (MILLER) SWEET [Juglandaceae] Shoot 2 103 DUKE1992A
Rhus copallina L. [Anacardiaceae] Stem 0.2 92 DUKE1992A
Fucus vesiculosus L. [] Plant 91 91 PED
Diospyros virginiana L. [Ebenaceae] Stem 0.2 81 DUKE1992A
Quercus alba L. [Fagaceae] Stem 0.2 76 USG
Prunus serotina subsp. serotina [Rosaceae] Leaf 0.3 67 USG
Rhus copallina L. [Anacardiaceae] Leaf 0.2 67 DUKE1992A
Malus domestica BORKH. [Rosaceae] Fruit 0.002 64 AAS USG
Pinus echinata MILLER [Pinaceae] Shoot 1.7 63 USG
Lycopersicon esculentum MILLER [Solanaceae] Fruit 0.003 60 DUKE1992A
Quercus stellata WANGENH. [Fagaceae] Stem 0.7 59 DUKE1992A
Liquidambar styraciflua L. [Hamamelidaceae] Stem 0.2 57 DUKE1992A
Carya ovata (MILL.) K. KOCH [Juglandaceae] Shoot 0.7 46 DUKE1992A
Sassafras albidum (NUTT.) NEES [Lauraceae] Stem 0.1 37 USG
Diospyros virginiana L. [Ebenaceae] Leaf 0.5 35 DUKE1992A
Sassafras albidum (NUTT.) NEES [Lauraceae] Leaf 1 34 USG
Quercus velutina LAM. [Fagaceae] Stem 1.5 31 DUKE1992A
Asparagus officinalis L. [Liliaceae] Shoot 1.5 30 DUKE1992A
Liquidambar styraciflua L. [Hamamelidaceae] Leaf 0.4 25 DUKE1992A
Quercus phellos L. [Fagaceae] Stem 0.4 21 DUKE1992A
Rhus glabra L. [Anacardiaceae] Stem 0.4 20 DUKE1992A
Hypericum perforatum L. [Clusiaceae] Leaf 6 18 PM1986
Quercus rubra L. [Fagaceae] Stem 1.4 17 DUKE1992A
Zea mays L. [Poaceae] Seed 0 14 HAM33(4):42 USG
Hypericum perforatum L. [Clusiaceae] Plant 2 12 PM1986
Prunus domestica L. [Rosaceae] Fruit 0.02 11.9 AAS USG
Phaseolus vulgaris subsp. var. vulgaris [Fabaceae] Fruit 0.01 10.5 AAS USG
Cinnamomum sieboldii [Lauraceae] Root Bark 9 9 DUKE1992A
Vitis vinifera L. [Vitaceae] Fruit 0.02 9 AAS USG
Cinnamomum sieboldii [Lauraceae] Bark 8 8 DUKE1992A
Citrus paradisi MacFAD. [Rutaceae] Fruit 0.02 7.7 AAS USG
Lactuca sativa L. [Asteraceae] Leaf 0.02 6 DUKE1992A
Urtica dioica L. [Urticaceae] Leaf 1 6 AAS
Brassica oleracea var. capitata l. var. capitata L. [Brassicaceae] Leaf 0.002 5.8 AAS USG
Hypericum perforatum L. [Clusiaceae] Root 4 5 PM1986
Momordica charantia L. [Cucurbitaceae] Fruit 5 5 MPI
Phaseolus lunatus L. [Fabaceae] Seed 0.4 5 DUKE1992A
Cichorium endivia L. [Asteraceae] Leaf 4 4.8 DUKE1992A
Brassica pekinensis (LOUR.) RUPR. [Brassicaceae] Leaf 3.8 4.2 DUKE1992A
Solanum tuberosum L. [Solanaceae] Tuber 0.01 4.2 AAS USG
Petroselinum crispum (MILLER) NYMAN EX A. W. HILLL [Apiaceae] Plant 0.08 4 AAS USG
Phoenix dactylifera L. [Arecaceae] Seed 0.1 4 ABS
Vigna mungo (L.) HEPPER [Fabaceae] Seed 3.832 3.832 DUKE1992A
Beta vulgaris subsp. subsp. vulgaris [Chenopodiaceae] Root 0.01 3.5 AAS USG
Rhodymenia palmata [] Plant 3.5 3.5 DUKE1992A
Prunus persica (L.) BATSCH [Rosaceae] Fruit 0.3 3 DUKE1992A
Sorbus aucubaria L. [Rosaceae] Fruit 0.1 3 DUKE1992A
Spinacia oleracea L. [Chenopodiaceae] Leaf 0.03 3 AAS
Cucumis sativus L. [Cucurbitaceae] Fruit 0.002 2.8 DUKE1992A
Cucumis melo subsp. ssp melo var.cantalupensis NAUDIN [Cucurbitaceae] Fruit 1.74 2.2 USG
Apium graveolens L. [Apiaceae] Root 0.01 2 AAS
Capsicum annuum L. [Solanaceae] Fruit 0.004 2 AAS USG
Daucus carota L. [Apiaceae] Root 0.01 2 DUKE1992A
Vaccinium macrocarpon AITON [Ericaceae] Fruit 0.2 2 AAS
Corylus avellana L. [Betulaceae] Seed 1.7 1.7 FUR
Triticum aestivum L. [Poaceae] Seed 1.653 1.653 DUKE1992A
Solanum melongena L. [Solanaceae] Fruit 1.4 1.6 DUKE1992A
Vigna radiata (L.) WILCZEK [Fabaceae] Seed 1.57 1.57 HAM33(4):42
Allium cepa L. [Liliaceae] Bulb 0.01 1.4 AAS USG
Pyrus communis L. [Rosaceae] Fruit 0.02 1.11 DUKE1992A
Citrus sinensis (L.) OSBECK [Rutaceae] Fruit 0.02 1.1 USG 1/
Phaseolus vulgaris subsp. var. vulgaris [Fabaceae] Seed 0.7 1 USG
Rheum rhabarbarum L. [Polygonaceae] Pt 0.02 1 DUKE1992A
Rubus chamaemorus L. [Rosaceae] Fruit 0.1 1 DUKE1992A
Oryza sativa L. [Poaceae] Seed 0.9 0.9 DUKE1992A
Anethum graveolens L. [Apiaceae] Plant 0.05 0.8 AAS
Pimenta dioica (L.) MERR. [Myrtaceae] Plant 0.8 0.8 DUKE1992A
Pistacia vera L. [Anacardiaceae] Seed 0.8 0.8 DUKE1992A
Cocos nucifera L. [Arecaceae] Seed 0.7 0.7 FUR
Vaccinium myrtillus L. [Ericaceae] Fruit 0.04 0.7 AAS L
Juglans nigra L. [Juglandaceae] Seed 0.6 0.6 FUR
Ribes nigrum L. [Grossulariaceae] Fruit 0.04 0.6 AAS
Raphanus sativus L. [Brassicaceae] Root 0.01 0.57 DUKE1992A
Pisum sativum L. [Fabaceae] Seed 0 0.5 DUKE1992A
Ribes rubrum L. [Grossulariaceae] Fruit 0.02 0.5 DUKE1992A
Carya ovata (MILL.) K. KOCH [Juglandaceae] Seed 0.4 0.4 DUKE1992A
Prunus dulcis (MILLER) D. A. WEBB [Rosaceae] Seed 0.07 0.4 AAS FUR
Rosa canina L. [Rosaceae] Fruit 0.16 0.4 AAS
Vaccinium vitis-idaea var. minus LODD. [Ericaceae] Fruit 0.05 0.4 DUKE1992A
Anacardium occidentale L. [Anacardiaceae] Seed 0.3 0.3 DUKE1992A
Brassica napus var. napobrassica var. napobrassica (L.) REICHB. [Brassicaceae] Root 0.01 0.3 AAS
Carya illinoensis (WANGENH.) K. KOCH [Juglandaceae] Seed 0.3 0.3 DUKE1992A
Juglans cinerea L. [Juglandaceae] Seed 0.3 0.3 DUKE1992A
Armoracia rusticana GAERTN. ET AL. [Brassicaceae] Root 0.02 0.15 AAS
Pastinaca sativa L. [Apiaceae] Root 0.01 0.1 DUKE1992A
Arachis hypogaea L. [Fabaceae] Seed 0.07 0.07 DUKE1992A
Quercus rubra L. [Fagaceae] Seed 0.01 0.01 DUKE1992A
Artemisia vulgaris L. [Asteraceae] Plant     CPB38:2205
Boehmeria nivea (L.) GAUDICH. [Urticaceae] Plant     DUKE1992A
Brassica oleracea var. italica L., PLENCK [Brassicaceae] Leaf     AAS
Chondrus crispus (L.) STACKH. [] Plant     PED
Cinnamomum burmannii (NEES) BLUME [Lauraceae] Bark     DUKE1992A
Cinnamomum verum J. PRESL [Lauraceae] Bark     CPB38:709
Crataegus laevigata (POIR.) DC [Rosaceae] Fruit     23771
Crataegus laevigata (POIR.) DC [Rosaceae] Flower     23771
Fallopia japonica SIEBOLD & ZUCC. [Polygonaceae] Plant     CPB38:2205
Glechoma hederacea L. [Lamiaceae] Plant     CPB38:2205
Glycine max (L.) MERR. [Fabaceae] Seed     JAF44:2754
Linum usitatissimum L. [Linaceae] Seed     WOI
Musa x paradisiaca L. [Musaceae] Fruit     USA
Petasites japonicus (SIEBOLD & ZUCC.) MAXIM. [Asteraceae] Plant     CPB38:2205
Peucedanum decursivum (MIQ.) MAX. [Apiaceae] Plant     DUKE1992A
Polystichum polyblepharum (ROEM.) PRESL [Dryopteridaceae] Plant     DUKE1992A
Taraxacum officinale WEBER EX F. H. WIGG. [Asteraceae] Root     EGH13:108
Taraxacum officinale WEBER EX F. H. WIGG. [Asteraceae] Leaf     EGH13:108
Vigna unguiculata subsp. unguiculata [Fabaceae] Seed     USG