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| Washing removal of Pb and Cd from soil using four plant water extracts |
| Received:April 18, 2019 |
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| KeyWord:plant material;water extracts;soil washing;Buddleja asiatica;heavy metal |
| Author Name | Affiliation | E-mail | | XU Xiao-xun | College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
Key Laboratory of Soil Environment Protection of Sichuan Province, Chengdu 611130, China | | | TENG Yi | College of Resources, Sichuan Agricultural University, Chengdu 611130, China | | | YANG Yan | College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China | | | WANG Gui-yin | College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
Key Laboratory of Soil Environment Protection of Sichuan Province, Chengdu 611130, China | | | ZHANG Shi-rong | College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
Key Laboratory of Soil Environment Protection of Sichuan Province, Chengdu 611130, China | rsz01@163.com |
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| Abstract: |
| The purpose of this study is to investigate the feasibility of removing heavy metals from soil using washing agents extracted from plant materials. Four types of plant materials (i.e., Buddleja asiatica, Artemisia capillaries, Nicandra physaloides, and Eupatorium adenophora) were employed as washing agents to remove Cd and Pb from the contaminated soils of two different mines. We investigated the influences of various conditions, including washing agent concentration, pH, and washing time. The metal removal efficiencies of the four washing agents increased with their concentrations and declined with increasing pH; moreover, their efficiencies continuously increased, changed slightly, or initially increased and then decreased with increasing washing time. The use of B. asiatica resulted in the highest removal of Cd (72.45%) and Pb (13.27%) from soil A, and of Pb (17.27%) from soil B; additionally, the use of E. adenophora resulted in the highest removal of Cd (59.81%) from soil B. Therefore, B. asiatica and E. adenophora can be considered feasible washing agents for the remediation of soils contaminated by heavy metals. |
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