In Situ Chemical Reduction (ISCR) Technologies for ......1 In Situ Chemical Reduction (ISCR)...

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In Situ Chemical Reduction (ISCR) Technologies for Brownfield Redevelopment

Jim Mueller, Ramon Rivera and Andrzej Przepiora

Florida Brownfields 13th Annual Conference

November 14-17, 2010 Jacksonville, Florida

[email protected]

Environmental Biotechnology’s “Evolution” towards In Situ Chemical Reduction

ISCR

Molasses /Vegetable Oil

Lactates / Polylactates

Bacterial inoculation

www.AdventusGroup.comwww.AdventusGroup.com 22

- Metabolic breakdown products produced- Heavy metals unavoidably mobilized- Frequent reapplication required

- No intermediates - No mobilization - Long lasting (>5 yrs)

MNA ERD ZVI Abiotic MNA ISRM ISCR

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In Situ Chemical Reduction (ISCR™)

clay/organic matteragglomerate

mineral particle contaminant

desorbs

bacterialcells

zero-valent metal particle

desorbs


water film

clay plateletsmicroporeorganic

matter hydrated DARAMEND®

particle colonized bynative soil bacteriaUS Patents W.R. Grace & Company / ADVENTUS

200

400 Redox potentials of -600 mV to -800 mV

Significantly Lowered Eh Potential (ISCR™)

T t t Ti (d )

EhPo

tent

ial (

mV)

-600

-400

-200

0 5 10 15 2520Thermodynamics

of reductive decomposition become favorable

Buffering capacity


Treatment Time (days)

Control ZVI or Carbon OnlyEHC™

US Patents W.R. Grace & Company / Adventus

http://www.adventusgroup.com/library/icsr-references.shtml

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What is DARAMEND®

Plant-Based Organic amendments combining solid controlled-release carbon and nutrients (aerobic) and micro scale ZVI (ISCR)micro-scale ZVI (ISCR)

Materials made in the EU

ZVI often a clean, recycled material

Stimulates indigenous bacteria by providing carbon and nutrients

0 5 to < 5% by volume required to treat


0.5 to < 5% by volume required to treat most soils

Has been used – without failure - to treat over 8,000,000 tonnes of contaminated soils

Cycling between reductive and oxidative phases

Amendment composition and dosage are site ifi

ORP Cycling

specific

TIME

ANOXIC (NEGATIVE)

OXIC (POSITIVE)

REDOX

ONE CYCLE – 10 to 14 days

0


ANOXIC (NEGATIVE)

5 to 7 daysanaerobic

3 to 5 daysaerobic

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Case Study 1- DARAMEND FOR OCPs


DARAMEND® Treatmentof Pesticide Impacted Soil



5







6




Results (North Plot)


1 Removal and Destruction Efficiency2 Contaminants of Concern

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Results (South Plot)


1 Removal and Destruction Efficiency2 Contaminants of Concern

Results for Dieldrin - Average of both plots

45

50

DieldrinSouth Florida

0

5

10

15

20

25

30

35

40

0 1 2

Con

cen

trat

ion

(u

g/kg

)

Dieldrin

Dieldrin, DDT residuals 30 acre siteDaramend 2-3 cycles at 0.5% (wgt) per cycle10 days per cycle


Daramend Treatment Cycles $12.50/yd3

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DARAMENDDARAMEND® Treatment of ToxapheneTreatment of ToxapheneDARAMENDDARAMEND® Treatment of ToxapheneTreatment of Toxaphene

63

60

70

kg)

Data points represent mean of four replicates

36

24

149 7

20

30

40

50

once

ntra

tion

(mg/

k


9.7

1.9

0

10

co

Initial 15 (1) 31 (2) 49 (3) 66 (4) 142 (8)

days (cycles)

ISCR Treatment of Toxaphene and Catabolites


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A solid or liquid material that provides:

• Controlled-release, hydrophilic carbon source

What is EHC?

• Micro-scale (5- 50 um) zero valent iron (ZVI) or other reduced metals (Zn, Al), at 5 to >40% weight

• Major, minor and micronutrients


EHCEHCTMTM GranularGranularEHCEHCTMTM PelletPellet EHCEHCTMTM SlurrySlurryEHCEHCTM TM PowderPowder

EHC Influenced Reductive Treatment Zone

21 3 4

Direct ZVI corrosion effects


Indirect ZVI effects (H2 gas and iron corrosion product generation)

Carbon substrate fermentation produces volatile fatty acids (VFAs)

Bio-stimulation of the aquifer zone by the dissolved components

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EHC-M for Heavy Metals (CVOCs)

Contains controlled-release organic carbon, micro-scale zero valent iron (ZVI), a source of sulfate, and other additives designed for treatment of di l d l lldissolved trace metals as well as mixed plumes containing chlorinated volatile organic compounds (CVOCs) and metals.


Arsenic Speciation in the presence of dissolved Fe and S

www.AdventusGroup.comwww.AdventusGroup.com 2020From Craw et al. (2003)

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EHC-M for Immobilization of Heavy Metals

Compound Influent Concentration Range (ug/L)

Observed Removal Efficiency (%)

Antimony 24 500 >99Antimony 24,500 >99Arsenic 500 98

Cadmium 11 >99Chromium 200 >99

Cobalt 210 >99Copper 86 >99

Lead 64 000 >99


Lead 64,000 >99(Mercury) (1,020) (97)

Nickel 350 >99Zinc 50,400 92

Case Study 2 -EHC for TCE + Chromium Impacts

Site Description

Location Washington State

Type of Site Industrial

Description of Impacts Chromium and TCE


Impacts

Objective and Approach

Hot spot isolation using a grid of direct injection points, 75 to 85 ft bgs

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Field Results – Washington StateA total of 9,600 lbs of EHC-M was injected into the area, resulting in an average application rate of 0.15% to soil mass.


Field Results – Washington State

160

180Apr 06 (pre-injection)

10Apr 06 (pre-injection)

20

40

60

80

100

120

140

60

Cr c

on

cen

trat

ion

(ug

/L)

Oct 06 (post-injection)

Jan-07

2

4

6

8

TC

E c

on

cen

trat

ion

(ug

/L) Oct 06 (post-injection)

Jan-07

www.AdventusGroup.comwww.AdventusGroup.com 2424(Courtesy of EA Engineering, Science and Technology, Inc.)

0

20

AMW-63* MW-41

NANA 0AMW-63* MW-41

NANA

AMW-63 - New well installed in November 2006

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Case Study 3 -EHC-M for Toxaphene and Arsenic Impacts

Site Description

Location Florida

Type of Site Agricultural

Description of Impacts

Arsenic and Toxaphene in soil and groundwater


Objective and Approach Source zone and plume control

GeoProbe injections

Florida Cattle Dip VatEHC-M Placement to 13 ft bgs

S il i i i


GW Flow

Former CDV

5 ft

Soil mixing in trenches (2 ft wide)

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Florida Application Initial EHC-M Results

70

6000

0102030405060

Before 30 days 60 days

As

(ug/

L)

EHC-M

nd

0

5

10

15

20


As

(ug/

L)

EHC-M

nd ndnd


GW Flow

Former CDV

5 ft

0

1000

2000

3000

4000

5000


As

(ug/

L)

EHC-M

Other Parameters:

Expected increases in dissolved Fe and DOC

Case Study 4 -EHC-M for Localized Arsenic Impacts

Site Description

Location South Florida

Type of Site Industrial

Description of Impacts Arsenic in soil and groundwater


p

Objective and Approach Source zone and plume control

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Background

• A surface discharge of an As solution in a swale adjacent to railroad tracks has migrated to groundwater (6 ft bgs) groundwater (6 ft bgs).

• Access to the source area is limited by active rail lines and buried fiber optic cable.

• Rail lines and subsurface fiber optic cable has eliminated soil removal


eliminated soil removal as a viable remedy in this area.

On-Site Engineering Design

• Treatment consisted of 13“Chimneys” located within the As source area

• Chimneys contained 50% EHC-M + sand to a depth of 0 to 5 ft bgs

• EHC-M was also added in a shallow trench from 0 to 6


inches bgs

• Delivered EHC-M targeted the unsaturated soil and capillary fringe (ca. 3 to 5 ft bgs)

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Florida EHC-M Application


FDEP Regulatory g yAcceptance for ISCR

http://www.adventusgroup.com/pdfs/regulatory/FDEP


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The remedial standards were met for 100% of the plots within a period of four months

Performance Warranty

The guaranteed fixed-price cost of this turn-key project was ca. €61.000 per hectare (ca. €16 per tonne)

Significant cost savings when compared to theoretical cost of dig and dump of €78/tonne


100% money back warranty of performance provided.

Thank You. Questions Welcomed.

Adventus Americas

Illinois - Corporate HQ2871 W. Forest Rd, Ste 2Freeport, IL 61032tel: 815.235.3503toll-free: 888 295 8661

Adventus Europe•• AustriaFranz-Plattner Str. 28F6170 Zirl, Tirol, Austriatel: (+43) 5238 53262fax: (+43) 512 219 100333I f Ad t Gtoll-free: 888.295.8661

fax: [email protected]

Adventus CanadaOntario1345 Fewster DriveMississauga, OntarioCanada L4W 2A5tel: 905.273.5374fax: 905.273.4367

[email protected]

•• United KingdomPackwood Forge,Vicarage Road, •• FranceHockley Heath, 58 rue de PonthieuWest Midlands B94 6PS 75 008 Paris, Francetel: (+44) (0) 7872.080353 tel: (+33) (1) 56 43 64 59fax: (+43) 512.219.100333 fax: (+33) (1) 45 62 29 91

•• GermanyDuisburger Strasse 69-73 46049 Oberhausen , Germanytel: 49 (0) 621 804 2710

Adventus BrazilAvenida Paulista,nº 37 — 4º andarEd. Parque Cultural PaulistaCEP: 01311-902São PauloAdventus China

Anyuan Chaoyang


tel: +49 (0) 621 804 2710 fax: +49 (0) 621 804 2750

Manufacturing and Warehousing ADVENTUS technologies manufactured and warehoused in Europe.Quick and cost-efficient intra-EU shipping of inventory to your site from our network of facilities located in:• • Belgium •• France •• Germany •• Netherlands •• UK

Offices

Warehousing

Anyuan, Chaoyang District, Beijing 100101 PRCtel: 86-10-82721888Fax: 86-10-64957676

In Situ Chemical Reduction (ISCR) Technologies for ......1 In Situ Chemical Reduction (ISCR)...

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