EFFECT OF SOLID WASTE ON SOIL QUALITY IN SOME SELECTED DUMP SITE IN IMO STATE, NIGERIA
Abstract
ABSTRACT
The present study investigated the impact of solid waste disposal on soil quality
of three major dump-sites and a control site in Owerri, Imo State, Nigeria by
collecting samples at four sample from the dump-sites. Results obtained during
these studies showed that pH values ranged between 5.6 and 8.2, recording from
the four sample with the highest average 7.9 on sample B (Trans-egbu) and the
least from the control sample with an average of 6. Electrical conductivity
concentrations ranged from 0.21 mS/cm to 0.82mS/cm in the entire research.
Station A recorded the highest average EC value of 0.74Ms/cm followed by
station B (Trans-egbu) with average value of 0.70mS/cm. the least in terms of
average EC was recorded at uncontaminated site (control) with average EC of
0.33Ms/cm organic matter ranged from 0.47% to 2.23% in the entire stations.
Maximum organic matter was found in station A which is an old dumpsite with
an average of 1.95%. The second in terms of average organic matters was
recorded on sample B with 1.90 %, while the least was recorded on the
uncontaminated station with 0.52% of organic matter.
The chloride content in the soil was highest in sample A. It ranged between
165mg/Kg and 213mg/kg in sample A while in station, it ranged from 143 mg/kg
to 223 mg/kg. The least in terms of Chloride content was recorded at sample D
(Control station) range between 53mg/kg to 74mg/kg
The available nitrogen varied between 176kg/ha to 245 kg/ha in sample A, in
sample B, it varied between 184 to 202 kg/ha. Sample C varies between 187kg/ha
to 216kg/ha, while sample D varies between 108kg/ha to 140kg/ha.
From the bulk density result, the average highest bulk density was recorded at
sample A (Avu dump site) with 1.66g/cm3, followed with sample C with
1.62g/cm3.the least in terms of average bulk density was recorded at the
uncontaminated site (control) with 1.41g/cm3.
Particle size distribution showed that sample A had 2.5 uniformity coefficients
(UC), 1.5 coefficient of gradation (CC) with 4.2 % gravel, 93.9% sand and
1.9%fine. Sample B had 3.00 UC, 1.4 of CC with gravel= 0%, sand = 95.5% and
fine = 4.5%. Sample C had 2.4 of UC, 1.5 of CC with gravel= 1.2, sand = 87.8%
and fine11% sample D had 3 of UC, 0.9 with gravel = 0%, sand = 94% and fine
= 6%. The result of moisture content from the four samples showed that sample
A had 15 percent moisture content, sample B recorded 9 percent moisture content,
Sample C had 10 percent moisture content and sample recorded 6.3 percent
moisture content
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