Influence of Flue Gas Desulfurization Gypsum Amendments on Heavy Metal Distribution in Reclaimed Sodic Soils

Chen, Qun; Wang, Shujuan; Li, Yan; Zhang, Ning; Zhao, Bo; Zhuo, Yuqun; Chen, Changhe

doi:10.1089/ees.2014.0129

Cited by 30 publications

(13 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The concentrations of all the metals in the treated plots were well below the risk control standard for soil contamination of agricultural land in China MEEPRC (Ministry of Ecology and Environment of the People's Republic of China), 2018. Similar results were reported in our previous studies (Chen et al, 2015;Zhao et al, 2018aZhao et al, , 2018b and other studies (Koralegedara et al, 2017;Sakai, Matsumoto, & Sadakata, 2004) in both laboratory soil columns and field experiments.…”

Section: Soil Heavy Metalssupporting

confidence: 92%

“…Ca, S, K and B) and increase crop yields (Clark et al, 2001). In addition, the impurities and heavy metals in FGD gypsum and their potentially hazardous effects on plants and water after its application to soils have been studied extensively (Chen et al, 2015;Ishak, Seaman, Sumner, & Miller, 1999;Yang et al, 2016). In general, most studies have confirmed that the use of FGD gypsum in agriculture presents a relatively small ecological risk (Briggs, Fine, Markee, & Gustin, 2014;Sakai et al, 2004;Wang et al, 2008) and even helps remove trace elements from soils (Clark et al, 2001;Koralegedara et al, 2017).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Sustainable effects of gypsum from desulphurization of flue gas on the reclamation of sodic soil after 17 years

Zhao

Wang

et al. 2019

European J Soil Science

Self Cite

View full text Add to dashboard Cite

Reclamation of saline–sodic soils with gypsum from the desulphurization of flue gas (FGD) is a recently developed technique. However, limited information is available on the long‐term effects of FGD gypsum in agricultural fields. This study evaluated the effects of FGD gypsum on soil physical and chemical properties and heavy metal concentrations after 17 years. Established in 2001, the study site on the Tumochuan Plain of Inner Mongolia, China, has a sandy loam soil. The experimental field was divided into three classes characterized by small, medium and large exchangeable sodium percentage (ESP) values before the experiment. Based on the initial soil ESP values (6.1–20, 20–30 and 30–78.4%, respectively), FGD gypsum was applied once at rates of 20.9, 30.6 and 59.3 t ha−1 to the small‐, medium‐ and large‐ESP classes, respectively. Compared with the control plots, the treated plots showed decreases in soil pH of 9.8 and 7.5% and decreases in ESP of 52.7 and 46.6% at the 20–40‐cm and 40–60‐cm depths, respectively. The treated plots showed remarkable decreases in electrical conductivity at the 20–60‐cm depth in the small‐ESP class, but moderate increases at the 0–20‐cm depth in the medium‐ and large‐ESP classes. The dissolved salt composition changed, with substantially larger Ca2+ and SO42− but smaller CO32− + HCO3− concentrations in the treated plots than in the control plots. The treated plots showed increases in the macroaggregate fractions (>250 μm) and decreases in the silt–clay fractions (<53 μm). There were no significant differences in the heavy metal (Cd, Hg, As, Pb, Cr, Cu, Zn and Ni) concentrations among the plots; thus, the use of FGD gypsum in agricultural fields is safe. The beneficial effects of FGD gypsum on the reclamation of sodic soils remained and were concentrated deeper in the soil after 17 years. Highlights Limited information is available on the lasting effects of FGD gypsum in agricultural fields. The long‐term effects of FGD gypsum on soil physicochemical properties are reported for the first time. The beneficial effects of FGD gypsum on soil reclamation extended to the 20–60‐cm soil layers. The use of FGD gypsum in agricultural fields was safe, and the effects lasted many years.

show abstract

Section: Soil Heavy Metalssupporting

confidence: 92%

mentioning

confidence: 99%

Sustainable effects of gypsum from desulphurization of flue gas on the reclamation of sodic soil after 17 years

Zhao

Wang

et al. 2019

European J Soil Science

Self Cite

View full text Add to dashboard Cite

show abstract

“…Biochar materials strongly sorb polycyclic aromatic hydrocarbons (PAHs) and are thus characterized by very high sorption coefficients (K D ) for PAHs [27].It was also reported that the N loss was mitigated by adding FGD gypsum to composting materials [28,29]. Flue gas desulphurization gypsum (FGD gypsum) is a by-product of wet gas desulphurization in coal-fired power stations and generally has a high purity, low heavy metal content, and is rich in essential mineral nutrients for plants such as S, Si and Ca [30,31]. The volatilization of ammonia and N loss were reduced by combining organic N-rich organic waste with FGD gypsum during the composting process [29].…”

mentioning

confidence: 99%

“…Gypsum has been known as an effective product used in the remediation of sodic soils, by greatly reducing the exchangeable Na, K, and Mg cation concentrations in the sodic soils [32,33]. Approximately 1-2 wt % of FGD gypsum was used to reclaim the sodic soil which resulted in no obvious heavy metal contamination [31]. Guo et al [30] suggested adding 10% FGD gypsum to compost material to reduce nitrogen loss during composting.…”

mentioning

confidence: 99%

The Effect of Co-Additives (Biochar and FGD Gypsum) on Ammonia Volatilization during the Composting of Livestock Waste

2018

View full text Add to dashboard Cite

The effectiveness of co-additives for improving livestock waste composting (reduction of air pollution and conservation of nutrients) was investigated. Biochar and Flue gas desulphurization gypsum (FGD gypsum) were used to supplement the composting of a mixture of slaughter waste, swine slurry, and sawdust. Different compositions of additives (0% or 5% each, 10% biochar or FGD gypsum) were tested in triplicate on the laboratory scale. In addition, the effects of two different aeration schemes (continuous and intermittent) were also investigated. Ammonia volatilization, physicochemical characteristics, and compost maturity indices were investigated. The results indicated that the use of the co-additive (Biochar and FGD gypsum) during composting of livestock waste led to a reduction of ammonia volatilization by 26-59% and to a 6.7-7.9-fold increase of nitrate accumulation. The total ammonia volatilization of intermittent aeration treatment was lower than that of continuous aeration using co-additives treatment. It was concluded that co-additives (biochar and FGD gypsum) might be utilized in livestock waste composting to reduce ammonia volatilization and improve nutrient conservation.Sustainability 2018, 10, 795 2 of 18 both the aeration rate and the ratio of bulking agent to waste during composting [8,9]. Among the potential odor compounds, ammonia (NH 3 ) is a major component that causes odors nuisance and toxicity to humans and plants [10]. Nitrogen losses that occurred during composting resulted in the emission of ammonia (NH 3 ) gas (ammonia volatilization) accounted for 24-33% of the initial N in household waste [11], 46.8-77.4% of the initial N of a mixture of straw and manure [12], 62% of the initial N was during composting of poultry layer manure [13], and 24-64% of the nitrogen was in organic waste [14]. The volatilization of ammonia deteriorating both human health and the environment would reduce the fertilizer value of the organic waste. Barrington et al. [15] reported that carbon availability, bulking agent, particle size, moisture content, and aeration regime are the factors that determine whether composting results in N volatilization as odor or N immobilization into organic components. The odor emission rate was correlated with both the aeration rate and the ratio of bulking agent to waste when composting [8].The utilization of chemical and biological additives to mitigate ammonia volatilization and nitrogen loss during the composting process has been extensively studied. These additives have included wood fly ash, lime, phosphor-gypsum, polyethylene glycol, jaggery [16], zeolite [17], bentonite [18], superphosphate [19], and microbial inoculants [20]. Among these additives, biochar was popular to be amended in the composting mixture. Biochar is a carbon rich material produced by the thermal decomposition of biomass, was effective for reducing volatilization of ammonia during the composting of a mixture of sewage sludge and wood chips [21]. The faster decomposition process in the bio-oxidative phase...

show abstract

“…The key to the improvement of saline-soil is the reduction of soil ESP. FGD-gypsum reducing soil ESP is due to that, calcium ion's flocculation ability for soil clay is superior to that of sodium ion [6], calcium ion from FGDgypsum could replace exchangeable sodium in soil colloids, then soil ESP is reduced [22].…”

Section: Soil Alkalinitymentioning

confidence: 99%

The Experimental Study on FGD-Gypsum Improving Coastal Saline-Soil

Du¹,

Hou²,

Chen³

2017

Proceedings of the 2016 International Conference on Biological Engineering and Pharmacy (BEP 2016)

View full text Add to dashboard Cite

Abstract-Two kinds of flue gas desulfurization gypsum (FGDgypsum) A# and B# were chosen to improve coastal saline-soil at the different ratios of quality (0%, 0.5%, 1%, 2.5%, 5%) respectively in soil column leaching experiment. A came from a steelworks whose technology was wet gas gush churn tower sintering flue gas desulfurization and B came from a coal-fired power plant whose technology was conventional spray wet limestone-gypsum flue gas desulfurization, A gypsum contained more impurities than B. The results showed that, compared with the control, applying A could increase soil saturated hydraulic conductivity and leaching sodium quality by 5~6 times, 11.0%~22.2%, and decrease soil pH, exchangeable sodium percentage (ESP) by 0.41~0.11, 25.1%~76.7%, respectively. The improvement effect of B was superior than that of A due to higher Ca 2+ dissolution efficiency and lower chloride ion content of B. Compared with A, B could increase soil saturated hydraulic conductivity and leaching sodium quality by 57.5%~89.1%, 51.3%~74.0%, and decrease soil pH, ESP by 0.10~0.36, 66.7%~83.6%, respectively. When two kinds of FGD-gypsum improving coastal saline-soil, the change rules of soil's physical and chemical properties were that, with increasing ratios of FGD-gypsum, soil saturated hydraulic conductivity increased before leveling off, leaching sodium quality gradually increased, soil pH declined before leveling off, ESP gradually reduced. And soil leaching sodium quality had relationship with the improvement of soil hydraulic conductivity and the substitution reaction of sodium and calcium. The application of FGD-gypsum to improve saline-soil, this kind of FGD-gypsum which has low chloride ion content, high calcium ion dissolution efficiency is recommended.

show abstract

Influence of Flue Gas Desulfurization Gypsum Amendments on Heavy Metal Distribution in Reclaimed Sodic Soils

Cited by 30 publications

References 23 publications

Sustainable effects of gypsum from desulphurization of flue gas on the reclamation of sodic soil after 17 years

Sustainable effects of gypsum from desulphurization of flue gas on the reclamation of sodic soil after 17 years

The Effect of Co-Additives (Biochar and FGD Gypsum) on Ammonia Volatilization during the Composting of Livestock Waste

The Experimental Study on FGD-Gypsum Improving Coastal Saline-Soil

Contact Info

Product

Resources

About