Effect of Chemical Dust Suppressants on Suitability of Herbaceous Plants in Copper Tailings Ponds

doi:10.12068/j.issn.1005-3026.2022.12.018

Abstract

Abstract: To study whether spraying chemical dust suppressants in the copper tailings pond will affect plants， three kinds of plants were selected and planted in copper tailings. Water or two chemical dust suppressant solutions were sprayed regularly. The germination rate of grass seeds， the growth status of plant and root， the shear strength of root-soil complex were used as evaluation indexes to study the effects of chemical dust suppressor on the adaptability of plants. The results showed that the adaptability of the three plants to copper tailings from high to low was Ryegrass， Astragalus adsurgens and Cynodon dactylon. The plants sprayed with calcium chloride solution did not germinate. Spraying polyacrylamide can improve the adaptability of plants， and its growth is even better than the plants sprayed with water. Ryegrass sprayed with polyacrylamide solution grew the best. Therefore， it can be determined that Ryegrass is suitable for regreening of copper tailings ponds. The polyacrylamide solution can be sprayed regularly in the tailings ponds， which can not only fix soil and suppress dust， but also improve the adaptability of plants.

Key words: copper tailings; chemical dust suppressant; herbaceous plant; environmental adaptability; solid soil and dust suppression

CLC Number:

TD989

WEI Zuo-an， XIE Jin-xin， ZHAO Jun-kang， LU Ting. Effect of Chemical Dust Suppressants on Suitability of Herbaceous Plants in Copper Tailings Ponds[J]. Journal of Northeastern University(Natural Science), 2022, 43(12): 1799-1804.

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