Mixed Contamination of Polyaromatic Hydrocarbons and Metals at Manufactured Gas Plant Sites: Toxicity and Implications to Bioremediation - Environmental Contamination: Health Risks and Ecological Restoration - page 364

the.presence.of.heavy.metal(loid)s.affects.the.bioremediation.of.organic.con-
taminants.by.inhibiting.microorganisms.that.are.capable.of.degrading.these.
pollutants..Successful.remediation.of.such.sites.contaminated.with.mixtures.
requires.novel.methods.based.on.(1).isolation.of.microorganisms.able.to.toler-
ate.toxic.levels.of.metal(loid)s.and.degrade.organic.pollutants,.(2).dual.bioaug-
mentation. with. two. types. of. microorganisms. comprising. metal. detoxiiers.
and. degraders. of. organic. compounds,. (3). combination. of. natural/modiied.
materials. to. immobilize. metal(loid)s. and. organic. detoxifying. microorgan-
isms,.and.(4).phytoremediation.using.plants.able.to.accumulate/stabilize.met-
als.and.detoxify.organic.pollutants.using.rhizosphere.bacteria..Although.few.
reports.exist.on.the.remediation.of.mixed.contaminants.such.as.2,4-D.in.the.
presence.of.Cd.under.laboratory.conditions,.virtually.no.information.is.avail-
able.on.remediation.of.PAHs.in.the.presence.of.heavy.metals.in.soils..Also,.
it. is. important. to. isolate. and. characterize. specialized. microorganisms. able.
to.detoxify.both.toxic.metals.and.organic.pollutants,.and.their.survival.and.
eficiency. under. ield. conditions. should. be. tested. for. their. use. in. the. ield-
scale. bioremediation.. This. is. now. emerging. as. a. promising. technology. for.
bioremediation.of.sites.contaminated.with.mixed.pollutants.as.in.MGP.sites.
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