Benefits and constraints for use of FGD products on agricultural land

Clark, R. B.; Ritchey, K. D.; Baligar, V. C.

doi:10.1016/s0016-2361(00)00162-9

Cited by 128 publications

(84 citation statements)

References 19 publications

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“…Figure 1 shows that application of FGD amendment prominently increased the mine soil pH through the ~ 30-d incubation period when pH of soil A was enhanced from 6.14 to above 8.10 ( Figure 1a) while that of soil B was amended from 4.37 to > 6.00 (Figure 1b). The highest neutralization capacity of this material arose from the remaining strong alkaline CaO and Ca(OH) 2 in the FGD product (Crews & Dick, 1998;Clark et al, 2001;Kost et al, 2005), which was also reflected by the highest pH value of this material (pH = 11.2, Table 4). Application of biosolids also increased soil pH to some extents: pH of soil A was changed from 6.14 to above 7.0 in 10 d and that of soil B increased from 4.37 to 5.00 in 1 d. Biosolids usually contained some alkaline materials (CaO, Ca(OH) 2 , or CaCO 3 ) which were added on purpose to increase the efficacy of the sludge digestion and to ensure the proper disposal of the wastes (USEPA, 2000).…”

Section: Chemical Compositions Of Mine Soils and Amendment Materialsmentioning

confidence: 93%

“…For example, FGD is effective in neutralizing soil acidity and reducing phytotoxicity of Al and Mn in acidic mine soils. However, raising soil pH to > 8 is generally detrimental to plant growth when a significant amount of FGD is applied to neutral or alkaline mine soils (Clark et al, 2001). Daniel et al (1994) suggested using high rates (300 Mg ha -1 ) of biosolids coupled with heavy lime application (100 Mg ha -1 ) to stabilize and re-vegetate extremely acidic (pH < 4) and metalliferous Pb/Zn smelter wastes, but using lower rates (75-150 Mg ha -1 ) of biosolid alone to re-vegetate non-acidic coal refuse materials.…”

Section: Mine Soil Amendmentsmentioning

confidence: 99%

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Quality Change of Mine Soils From Different Sources in Response to Amendments - A Laboratory Study

Liu¹,

Lal²

2014

ENRR

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The desired vegetation is often difficult to establish in mine soils without proper amendments. In this paper, two coal-mine soils were studied to assess changes of soil quality in response to a range of amendments. Sample A with relatively neutral pH (6.1) was obtained from the top soil at a reclaimed surface-coal-mining site while the other sample B (pH 4.4) from nearby piles of coarse coal refuse. Amendments included zeolite of two grain sizes, flue gas desulfurization gypsum (FGD), flyash, and biosolids at 10% (w/w) rates. Chemical analysis showed that neither soil contained significant amounts of toxic elements except for B and Sr. Lettuce seed germination indicated that original sample A possessed a better quality with 76.7% germination and 7.3 cm shoot length in comparison with soil B having 60% germination and 3.7 cm shoot length. FGD increased the pH of both soils from 6.1 to > 8.0 and from 4.4 to > 6.0, respectively. Moreover, FGD significantly enhanced lettuce germination (83.3%) and seedling growth (6.7 cm) in soil B but did not greatly affect those in soil A. We concluded that soil acidity might be the major chemical constraint inhibiting plant establishment in acidic mine soils and that amendments such as FGD which could increase soil pH up to the neutral level would enhance plant growth in these soils. Biosolids enhanced aggregate stability of both soils with geometric mean diameter increased from antecedent values of 0.90-0.97 mm to 1.2-1.6 mm. Zeolites or flyash did not significantly impact the mine soil quality.

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Section: Chemical Compositions Of Mine Soils and Amendment Materialsmentioning

confidence: 93%

Section: Mine Soil Amendmentsmentioning

confidence: 99%

Quality Change of Mine Soils From Different Sources in Response to Amendments - A Laboratory Study

Liu¹,

Lal²

2014

ENRR

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“…One concern for plants grown in CFA amended soil is B toxicity due to significant levels of B in CFA (Ukwattage et al, 2013). Application of fresh CFA can produce B toxicity in some plants, but B toxicity was not observed in plants grown on soils amended with weathered CFA because most of plant-available B readily leaches from soil (Clark et al, 2001). Sinha and Gupta (2005) while comparing various levels of CFA application (10, 25, 50, 75 and 100%, w/w) found that metal uptake by Sesbania cannabina plants was in the order of Fe > Mn > Zn > Cu !…”

Section: Impact Of Cfa On Plant-availability and Uptake Of Micro Elemmentioning

confidence: 99%

Opportunities and challenges in the use of coal fly ash for soil improvements – A review

Shaheen

Hooda

Tsadilas

2014

Journal of Environmental Management

249

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“…Gypsum is a common mineral found around the world in sedimentary rock formations, from which it is mined or quarried (Clark et al, 1999). Flue gas desulphurization gypsum is a synthetic material of identical chemical structure produced as a byproduct from coal-fired electric utilities (DeSutter and Cihacekm, 2009).…”

Section: Introductionmentioning

confidence: 99%

Effect of organic and mineral amendments upon soil respiration and microbial biomass in a saline-sodic soil

Celis¹,

Sandoval²,

Martínez³

et al. 2013

Cienc. Inv. Agr.

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J.E. Celis, M. Sandoval, B. Martínez, and C. Quezada. 2013. Effect of organic and mineral amendments upon soil respiration and microbial biomass in a saline-sodic soil. Cien. Inv. Agr. 40(3): 571-580. An understanding of soil carbon stocks and fluxes in saline-sodic soils is becoming critical in environmental management because salinity and sodicity are predicted to increase worldwide. The effects of amendment with sewage sludge (SW), mined gypsum (MG) and synthetic gypsum (SG) on the soil respiration rate and soil (S) microbial biomass (SMB) of a saline-sodic soil were assessed in vitro over 60 days under controlled conditions. The treatments were: T1 = S + MG (7 t ha -1 ); T2 = S + MG (7 t ha -1 ) + SW (90 t ha -1 ); T3 = S + SG (7 t ha -1 ); T4 = S + SG (7 t ha -1 ) + SW (90 t ha -1 ); T5 = S + SW (90 t ha -1 ); T6 = S + SW (270 t ha -1 ); T0 = Control (unamended soil). Soil respiration rates were determined by a respirometry method in a closed incubation chamber. SMB was measured by the chloroform fumigation-extraction procedure. The results showed that the highest respiration rate occurred when soil was amended with T6, followed by T5. Microbial respiration was the lowest with T1 and T3. The gypsum amendments did not significantly increase soil respiration, due to low organic matter (OM) intake. All treatments showed a gradual decrease of SMB over the 60-day incubation period. The saline-sodic soil was able to respond positively to large amounts of added sewage sludge, up to 270 t ha -1 .

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Benefits and constraints for use of FGD products on agricultural land

Cited by 128 publications

References 19 publications

Quality Change of Mine Soils From Different Sources in Response to Amendments - A Laboratory Study

Quality Change of Mine Soils From Different Sources in Response to Amendments - A Laboratory Study

Opportunities and challenges in the use of coal fly ash for soil improvements – A review

Effect of organic and mineral amendments upon soil respiration and microbial biomass in a saline-sodic soil

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