Environmental Engineering Reference
In-Depth Information
6
CK
SW
GW
DW
BW
5
4
Rain
3
Rain
2
1
0
13-Jul 16-Jul 19-Jul 20-Jul
22-Jul 1-Aug 10-Aug 18-Aug 20-Aug
Sampling data (day-month)
1-Sep 15-Sep 1-Oct 15-Oct 1-Nov 13-Nov
FIGURE 18.12
Variations.of.total.phosphorous.(TP).load.from.loodwater.in.a.rice.paddy.ield.with.different.
treatments..The.vertical.bars.are.standard.deviations.of.the.means,.n.=.3.
means. for. domestic. wastewater. treatment,. reducing. in. turn. the. level. of.
environmental.damage.
Remediation of Organic and Inorganic Pollutants in Soil
Rice. ields,. similar. with. natural. wetlands,. are. capable. of. purifying,. con-
suming,. and. stabilizing. a. variety. of. organic. and. inorganic. pollutants..
Besides. N. and. P. as. described. earlier,. results. have. suggested. that. paddy.
soils. have. a. speciic.feature.in.removing. POPs..Due. to. the.reductive.con-
ditions.and.biochemical.processes.of.anaerobic.microorganisms.in.paddy.
soils,.the.degradation.of.chlorinated.POPs.gets.accelerated.and.the.residual.
from. this. process. is. generally. found. to. be. lower. in. paddy. soils. than. in.
upland. soils. (An. et. al.. 2006,. Yao. et. al.. 2006,. 2007,. 2008,. Wang. et. al.. 2007)..
Based. on. these. indings,. it. can. be. concluded. that. contaminated. soils. can.
be.easily.remediated.and.reused.through.submersion.in.water.or.changing.
from. upland. to. paddy. rice. cultivation.provided. there. are.suficient. water.
resources. in. the. region.. It. has. been. suggested. that. this. approach. may. be.
incorporated. with. the. paddy. ield. compartment. of. the. National. Institute.
for.Agro-Environmental.Sciences'.Multimedia.Environmental.Fate.Model.
(NIAES-MMM-Global),. which. was. developed. in. Japan.. NIAES-MMM-
Global. is. used. to. estimate. the. long-term. fate. of. current-use. pesticides.
(CUPs). and. POPs. emitted. into. the. global. environment,. speciically. from.
Japan.and.the.rest.of.Asia.(Wei.et.al..2008).
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