NDLI: Effect of Sulfate Load on Sulfur Removal in Model Constructed Wetlands

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Effect of Sulfate Load on Sulfur Removal in Model Constructed Wetlands

Content Provider	Scilit
Author	Hou, Jiangxin Guo, Wenrui Wen, Yue
Copyright Year	2018
Description	Journal: Iop Conference Series: Earth and Environmental Science Four model constructed wetlands (CWs) were designed to investigate the effects of sulfate load on sulfate and sulfide removal. The results showed that as the sulfate load increased from 1.42 to 7.01 g S $m^{–3}$ $d^{–1}$, the sulfate removal rate increased from 1.42 to 3.16 g S $m^{–3}$ $d^{–1}$, and the sulfide discharge rate increased from 0.08 to 1.46 g S $m^{–3}$ $d^{–1}$. The total sulfur removal rate ranged between 1.29 and 1.74 g S $m^{–3}$ $d^{–1}$. The sulfide in the effluent only accounted for 5.55%–46.9% of the removed sulfate. This indicated that CWs can effectively reduce sulfide discharge while removing sulfate. The conversion of dissolved sulfide into deposited sulfur by CW matrix was a main way for sulfide removal. Elemental sulfur, acid volatile sulfide (AVS), and pyrite-sulfur were the main forms of sulfur deposition in this study. The accumulations of these three sulfur compounds were 16.6–36.2, 22.3–36.0, and 49.7–63.6 mg S $kg^{–1}$ gravel, respectively. Sulfur balance analysis showed that 42.9%–71.1% of the removed sulfate was deposited in the matrix, and only 0.84%–2.34% was absorbed by the plant.
Related Links	http://iopscience.iop.org/article/10.1088/1755-1315/186/3/012078/pdf
ISSN	17551307
e-ISSN	17551315
DOI	10.1088/1755-1315/186/3/012078
Journal	Iop Conference Series: Earth and Environmental Science
Issue Number	3
Volume Number	186
Language	English
Publisher	IOP Publishing
Publisher Date	2018-10-11
Access Restriction	Open
Subject Keyword	Journal: Iop Conference Series: Earth and Environmental Science Water Science and Technology Sulfate Load
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Physics and Astronomy Environmental Science

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