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Publication
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| Title of Article |
Role of Colocasia esculenta L. schott in arsenic removal by a pilotscale constructed wetland filled with laterite soil |
| Date of Acceptance |
11 February 2019 |
| Journal |
| Title of Journal |
Heliyon |
| Standard |
SCOPUS |
| Institute of Journal |
2015 Elsevier B.V. All rights reserved |
| ISBN/ISSN |
2405-8440 |
| Volume |
2019 |
| Issue |
- |
| Month |
- |
| Year of Publication |
2019 |
| Page |
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| Abstract |
The role of Plant Colocasia esculenta L. schott (Taro) in arsenic removal was investigated in a pilot-scale constructed wetland (PCW), which was filled with laterite soil (19.90-28.25% iron by weight). This PCW consists of 2 sets of flow systems in parallel, with Colocasia esculenta L. schott planted at a density of 20 plants/m2 in one system and the other without any plants. When operating this PCW, it was synthetic water containing arsenic concentration of 0.50 mg/l, with its pH controlled at 7 and influent flow at 1.5 m3/day. With Taro, the arsenic in water decreased from 0.485 mg/l to 0.054 mg/l (89% removal), whereas, without Taro, the arsenic decreased from 0.485 mg/l to 0.233 mg/l (52% removal). As for the fate of the influent arsenic, the Colocasia esculenta L. schott was responsible for 65% of arsenic accumulation. Note that the arsenic was found mostly within the root zone depth (20-40 cm). It appears that such a high capacity of arsenic removal was enhanced both by the plants through rhizostabilization and by the iron-adsorbed process within the laterite soil bed. In addition, the arsenic removal was observed to increase along with the time from 30 to 90 days, and it reached to a maximum removal around 90 days, and then decreased after 122 days. According to the plant data, the order of bioconcentration factor (BCF) was as follows: rootlet (0.28-0.80)> rhizome (0.15-0.21)> foliage (0.17-0.38)> leaf stalk (0.00-0.26), while the translocation factor (TF) was in the following order: foliage/rootlet (0.00-0.60) > leaf stalk/rootlet (0.00-0.40). |
| Keyword |
Arsenic, Constructed Wetland, Colocasia escolenta L. schott, Laterite soil |
| Author |
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| Reviewing Status |
มีผู้ประเมินอิสระ |
| Status |
ได้รับการตอบรับให้ตีพิมพ์ |
| Level of Publication |
นานาชาติ |
| citation |
false |
| Part of thesis |
true |
| Attach file |
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| Citation |
0
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Journal Publication
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