Effects of coal fly ash amended soils on trace element uptake in plants

Laboratory Evaluation of the Use of Alkaline Phosphate Wastes for the Control of Acidic Mine Drainage

“…Limestone and/or dolomite have been used to control AMD (Lapakko et al 1997;Mylona et al 2000), where it can be obtained inexpensively, but alkaline industrial by-products are an attractive alternative. Products that have been used as an amendment include: (1) fly ash produced by power plants (Ayala et al 1998;Bertocchi et al 2006;Brake et al 2003;Dermatas and Meng 2003;Doye 2005;Pérez-López et al 2005Yeheyis et al 2008), (2) cement kiln dust (CKD) produced in Portland cement manufacturing (Doye 2005;Lapakko et al 2000;Mehling et al 1997), (3) red mud produced by the aluminum industry (Bertocchi et al 2006;Doye and Duchesne 2003;Fortin et al 2000;Paradis et al 2007), and (4) alkaline sludge from the paper industry (Chtaini et al 1997). …”

Comparative study on elemental composition and DNA damage in leaves of a weedy plant species, Cassia occidentalis, growing wild on weathered fly ash and soil

“…Carlson and Adriano (1991) reported statistically significant high foliar content of As and Ni in two tree species (Platanus occidentalis and Liquidambar styraciflua) growing on fly ash as compared to those growing on soils. Elevated foliar concentrations of As, Ni, and Cr have also been reported for other plant species growing on fly ash or on soil amended with fly ash (Adriano et al 2002;Brake et al 2004;Jensen et al 2004;Maiti and Nandhini 2006). The leaf tissue concentrations of trace elements observed in natural populations of C. occidentalis growing at two contrasting sites is the result of time-integrated uptake of these elements from the environment by the individual plants.…”

“…Sample and Suter II (2002) also highlighted the ecological risks posed to terrestrial wildlife associated with coal ash disposal sites. Of the different contaminants found in fly ash, trace elements are considered serious environmental contaminants due to: (1) their mobilization and bioaccumulation in food chain via plants, (2) contamination of waters due to leaching, and (3) their toxicity to biota (Carlson and Adriano 1993;Adriano et al 2002;Brake et al 2004;Reash et al 2006). The issue that fly ash is nonhazardous, but some of the trace elements present in it are toxic is yet to be reconciled (Rubin 1999).…”

Control of acid mine drainage from an abandoned mine in Morocco by using cement kiln dust and fly ash as amendments

“…An alternative approach is to add sufficient alkaline material to neutralize the acidity and immobilize the metals [20,21]. A lot of products have been used as an amendment like: (1) fly ash produced by power plants [22][23][24][25][26][27][28][29][30]16], (2) cement kiln dust (CKD) produced in Portland cement manufacturing [30][31][32]16], (3) red mud produced by the aluminum industry [27], (4) paper pulp [33]. Other projects aims to valorize mine tailings (ex.…”