Heavy Metal Remediation Potential of a Tropical Wetland Earthworm, Libyodrilus violaceus (Beddard)
سال انتشار: 1395
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 414
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شناسه ملی سند علمی:
JR_IJEE-7-3_006
تاریخ نمایه سازی: 6 شهریور 1396
چکیده مقاله:
Wetlands play important strategic ecological and life-supporting roles. As a result, they are continuously exposed to pollutants inflow including heavy metals. The aim of this research was to evaluate the heavy metal remediation potential of a tropical wetland earthworm, Libyodrilus violaceus.L. violaceus were exposed to soils contaminated with different concentrations of heavy metals using natural optimal soil density of 18 worms per kg soil, for 12 weeks. Relative to their initialconcentrations, there were significant reductions of Zn, Pb and Cd at the end of the experiment. From the soil contaminated with a combination of Zn, Pb and Cd, the highest significant (p < 0.05) Cdreduction of 8.08 mg/kg soil occurred in the 12th week, the highest significant (p < 0.05) Zn reduction of 37.47 mg/kg soil occurred in the 8th week, while Pb recorded the highest but not significant (p > 0.05) reduction of 19.07 mg/kg in the 12th week. The effect of addition of cow dung on the ability of L. violaceus to reduce heavy metals was generally low. L. violaceus is recommended as a good candidate for the remediation of low to moderate heavy metal contamination in wetland ecosystem
کلیدواژه ها:
نویسندگان
e.o dada
Department of Cell Biology and Genetics (Environmental Biology Unit), University of Lagos, Akoka, Yaba, Lagos, Nigeria
k.l njoku
Department of Cell Biology and Genetics (Environmental Biology Unit), University of Lagos, Akoka, Yaba, Lagos, Nigeria
a.a osuntoki
Department of Biochemistry, Faculty of Basic Medical Sciences, College of Medicine, University of Lagos, Idi-Araba, Lagos, Nigeria
m.o Akinola
Department of Cell Biology and Genetics (Environmental Biology Unit), University of Lagos, Akoka, Yaba, Lagos, Nigeria