Hydrolysed wool: A novel chelating agent for metal chelant-assisted phytoextraction from soil

Wool-waste as organic nutrient source for container-grown plants

“…Hydrolysed wool has been tried as fertilizer source for plants (Nustorova et al, 2006) or as binding agent for heavy metals (Evangelou et al, 2008). There are no publications on the potential use of wool-waste as a potting medium constituent, although prior research (Zheljazkov, 2005;Zheljazkov et al, 2008a) has demonstrated that uncomposted wool could be used as plant nutrient source.…”

Hydrolysed wool: a novel soil amendment for zinc and iron biofortification of wheat

“…Manure has high contents of microbially-bound faecal proteins, but low contents of amino acids and oligo-peptides, which is considered the reason for the low transfer of N from manure to crops (Bosshard et al 2011). From sheep wool, amino acids and oligo-peptides can be obtained rapidly by nonspecific enzymatic hydrolysis (Evangelou et al 2008). Sheep wool is also a source of Zn itself and may contain up to 195 mg of Zn kg…”

“…The amendment of soils, in order to solubilize and desorb trace elements from the soil matrix, with synthetic chelating agents is very expensive (Cakmak 2008), and in case of low biodegradability, as for EDTA, it is also questionable from an environmental point of view ). The application of biodegradable amendments could be more promising (Evangelou 2007;Evangelou et al 2008). In particular, amino acids, peptides and proteins have the ability to complexate metals such as Zn and Fe.…”

“…Some amino acids such as histidine play an important role in the uptake of Zn and Fe by plants. In addition, amino acids and peptides can mobilize TE in soil (Evangelou et al 2008). Therefore, through the application of hydrolysed wool, it is likely that Zn and Fe were applied to the soil in a complexed and phytoavailable form.…”

Low-cost sorbents for the removal of acid dyes from aqueous solutions

“…Efforts have been lately made for the valorization of these renewable resources, mainly by keratin solubilization and regeneration into useful materials, from biomaterials with medical applications (Rouse and Van Dyke, 2010) to soil fertilizers (Zoccola et al, 2015). Due to their ability to adsorb heavy metals from aqueous solutions, native or processed keratinous materials can find promising applications for the treatment of heavy metal pollution (Aluigi et al, 2012;Evangelou et al, 2008;Khosa and Ullah, 2014;Wen et al, 2010). Little research has been dedicated to investigating their potential utilization for color removal from aqueous solution (Gupta et al, 2006;Mittal et al, 2013;Saleem et al, 2005).…”