Environmental Engineering Reference
In-Depth Information
at. excessive. levels.. It. deals. with. the. current. understanding. of. the. genetic.
and.biochemical.mechanism.that.controls.Se.tolerance.and.accumulation.in.
plants..Chapter.15.provides.a.comprehensive.review.on.the.occurrence.and.
fate.of.phthalate.esters.in.different.ecological.compartments,.with.emphasis.
on.its.microbial.transformation,.which.includes.aerobic.as.well.as.anaerobic.
degradation..Chapter.16.describes.the.toxicity.and.biological.degradation.of.
mixed. contamination:.PAHs. and. toxic.metals. (such.as.Cd,.Cu,.Ni,.and.Pb).
that.are.commonly.encountered.at.manufactured.gas.plants.(MGP).sites..It.
highlights.the.importance.of.isolating.and.characterizing.suitable.microbes.
that.are.capable.of.detoxifying.both.organic.contaminants.and.toxic.metals.
and.their.survival.and.eficiency.under.ield.conditions.
There.are.six.chapters.in.Part.IV,.“Ecological.Restoration.of.Contaminated.
Sites:. Phytoremediation.”. Chapter. 17. also. deals. with. the. same. problem.
observed.in.mangrove.sites.that.are.contaminated.by.both.PAHs.and.heavy.
metals..The.major.aim.of.this.investigation.is.to.screen.most.suitable.man-
grove. plant. species. based. on. their. structural. modiications. in. roots. and.
physiological.and.biochemical.changes.in.different.plant.tissues.for.restoring.
these.sites..Chapter.18.describes.the.origin.of.paddy.ields.in.urbanized.areas.
of.Yangtze.River.Delta.and.their.potential.function.in.phytoremediation.of.
contaminants,. which. is. important. to. ensure. sustainable. development. by.
provision.of.food.security.and.environmental.safety.in.the.region..Chapter.
19.further.focuses.on.the.use.of.constructed.wetlands.for.lood.prevention.
and.pollution.control,.by.introducing.the.concept.of.Integrated.Urban.Water.
Management. (IUWM).. Elevated. levels. of. As. are. commonly. found. in. mine.
tailings.derived.from.extraction.of.gold..Chapter.20.highlights.the.successful.
application.of.phytostabilization.in.the.Victorian.Goldields.of.southeastern.
Australia,. by. means. of. plants. that. are. As. tolerant. with. low. As. accumula-
tion.(four.species.of. Eucalyptus .and.some.native.grass.species),.for.irewood.
production,.extraction.of.cineole.( Eucalyptus .oil),.and.a.drought-resistant.and.
low-maintenance.pasture..Chapter.21.also.provides.a.successful.case.for.sta-
bilizing.As-contaminated.sites.in.Korea,.using.stabilizing.agents,.including.
cement,.pozzolans,.lime,.iron(hydr)oxide,.and.ly.ash,.in.order.to.reduce.the.
mobility.and.toxicity.of.As..Chapter.22.deals.with.the.restoration.of.brown-
ield.sites.in.northwest.England,.by.focusing.on.the.importance.of.reducing.
bioavailability.of.As,.Cd,.Cu,.Ni,.and.Zn.by.applying.green.waste.compost.
and.phosphate,.in.terms.of.phytoremediation.and/or.natural.attenuation.for.
risk.assessment.
Conclusion
Being.one.of.the.world's.mega.river.deltas,.the.PRD.has.been.the.most.impor-
tant.homeland.for.supplying.ish,.meat,.and.vegetables.to.Hong.Kong.due.to.
 
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