Ecological Restoration Alliance of Botanic Gardens

South China Botanical Garden, CAS

Ecological restoration of degraded ecosystems in oil shale waste

Posted on 15 September 2016

South China Botanic Garden is carrying out research in cooperation with Maoming Petrochemical Company. We screened out the suitable plants, including 20 tree-species and 3 grass-species. These species have strong adaptability to oil shale waste and could be extended to revegetate acidic discarded mineral waste residue in tropical and subtropical regions and degraded ecosystems in arid wasteland. Six tree-species showed strong ability to enrich Cd, Pb, Zn and Mn via uptake through their roots, indicating that these plants had strong scavenging capacity to these toxic metals, speeding up the revegetating process of the oil shale waste dump. Paspalum notatum was found to have strong accumulation capacity of active Al in its leaf and finally pull Al away from the waste. This technology was granted a national patent “A method eliminating Al toxicity in soil by phytoremediation” (Patent No. ZL 200710035750.2)

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