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| Study on the Plants for Remediation of Heavy Metal Polluted Soil in Lead-Zinc Mine and Its Applicaton in Pulp and Paper Making |
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| DOI：10.11981/j.issn.1000-6842.2018.03.14 |
| Key Words:lead-zinc mine; heavy metal; phytoremediation technology; kraft cooking; pulp and paper making |
| Fund Project:2013年度广西高校科学技术研究项目（2013YB020）。 |
| Author Name | Affiliation | | LIU Xiu-yu | College of Light Industry and Food Engineering, Guangxi University, Nanning, Guangxi Zhuang Autonomous Region, 530004 | | FANG De-jian | College of Light Industry and Food Engineering, Guangxi University, Nanning, Guangxi Zhuang Autonomous Region, 530004 | | WU Lang-peng | College of Light Industry and Food Engineering, Guangxi University, Nanning, Guangxi Zhuang Autonomous Region, 530004 | | MA Shu-yu | College of Light Industry and Food Engineering, Guangxi University, Nanning, Guangxi Zhuang Autonomous Region, 530004 | | CHEN Guo-ning* | College of Light Industry and Food Engineering, Guangxi University, Nanning, Guangxi Zhuang Autonomous Region, 530004 |
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| Abstract: |
| This paper researched the heavy metal pollution situation in an abandoned lead-zinc mine, moreover, the dominant plants with excellent remediation effect of heavy metal polluted soil in the mine were selected. Furthermore, the cooking process with the selected dominant plants as the raw material was conducted, the pulpability and the physical properties and safety performances of formed paper were evaluated. The results showed that the content of Pb, Zn and Cd in the lead-zinc mine exceeded China’s national environmental soil secondary standard. Six main plants were selected in the mine, among them, the enrichment behaviors of mulberry, miscanthus floridulus and pteris vittata were stronger, and could be used as the main plants for the remediation of heavy metal polluted soils. When alkali charge and sulphidity were 20%, the pulp yield of pteris vittata was only 31.1%, Kappa number and inorganic substance amount were 19.4 and 9.55%, respectively, which were relatively high. Comparatively, the higher pulp yield of miscanthus floridulus and mulberry were 48.4% and 45.1%, respectively. Kappa number was 7.8 and 13.8, respectively. The bursting strength, tear strength and tensile strength of the formed paper with pteris vittata pulp were very low, but strength performances of formed papers with miscanthus floridulus and mulberry pulps were better. Finally, the heavy metal contents of formed papers with miscanthus floridulus and mulberry pulps were close to the physical and chemical index requirements of Chinas national standards for food wrapping paper. |
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