Fraction Transformation of Cr in Leersia hexandra Swartz Constructed Wetland

2018 9th International Conference on Environmental Science and Technology

生态环境科学

Wang, Jiansheng^1,2 ; Zhang, Xingfeng^1,2 ; Gao, Fengjiao^1,2 ; Goto, Masafumi^3

Guangxi Key Laboratory of Guangxi Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin

541004, China^1

Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin

541004, China^2

Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia Kuala Lumpur, Kuala Lumpur

54100, Malaysia^3

关键词: Constructed wetlands;    Contaminated wastewater;    Fraction distribution;    Weak acids;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/182/1/012006/pdf
DOI  :  10.1088/1755-1315/182/1/012006

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In this paper, the fraction distribution of Cr contaminated wastewater were treated by Leersia hexandra Swartz constructed wetlands. The results showed that with the Cr-contaminated wastewater enter the wetland, the wastewaters transformed to different forms respectively, and residuals fraction mainly were existed in the matrix and in plant bodies. The residuals present in all zones turned up at first and then decreased; the reducible fraction showed a gradual decreased in the wetland; and the weak acid extractable did not change much. The fraction of Cr in L. hexandra roots increased first and then decreased in different zone, of which the most obvious changes were in weak acid extractable fraction. The fraction of weak acid extractable and residue in the stems of L. hexandra increased first and then decreased in different zone, while the ethanol fraction decreased gradually. Residue fraction and ethanol fraction in different zone gradually decreased in the L. hexandra leaves, while the weak acid extractable showed the first increase and then decrease.