dingxinda
Yeni Üye
Kayıt Tarihi: 2021-13-Ocak
Aktif Durum: Pasif
Gönderilenler: 30
|
| Gönderen: 2021-23-Ocak Saat 09:51 | Kayıtlı IP
|
|
|
Persistent reductions in the bioavailability of PCBs at a
tidally inundated Phragmites australis marsh amended with
activated carbonyongruida
active carbon
In situ amendment of sediments with highly sorbent
materials like activated carbon (AC) is an increasingly
viable strategy to reduce the bioavailability of
persistent, sediment-associated contaminants to benthic
communities. Because in situ sediment remediation is an
emerging strategy, much remains to be learned about the
field conditions under which amendments can be effective,
the resilience of amendment materials toward extreme
weather conditions, and the optimal design of engineered
applications. We report the results of a multiyear,
pilot-scale field investigation designed to measure the
persistence and efficacy of AC amendments to reduce the
bioavailability of polychlorinated biphenyls (PCBs) in an
intertidal Phragmites marsh. The amendments tested were
granular AC (GAC), GAC with a layer of sand, and a
pelletized fine AC. Key metrics presented include
vertically resolved black carbon concentrations in
sediment and PCB concentrations in sediment, porewater,
and several invertebrate species. The results demonstrate
that all 3 amendments withstood Hurricane Sandy and
remained in place for the duration of the study,
successfully reducing porewater PCB concentrations by 34
to 97%.carbon/">activated carbon bulk australiaReductions
in invertebrate bioaccumulation were observed in all
amendment scenarios, with pelletized fine AC producing
the most pronounced effect. The present findings support
the use of engineered AC amendments in intertidal marshes
and can be used to inform amendment design, delivery, and
monitoring at other contaminated sediment sites.
|
Aktif Konular 
Üye Listesi 
Arama 
Yardım
Kayıt Ol 
Giriş
Gitar-tr.com FORUM : Gitar-tr.com Tanisma Toplantisi !!!
Konu: Phragmites australis marsh amended withAC
