Effect of dissolved organic carbon from sludge, Rice straw and spent coffee ground biochar on the mobility of arsenic in soil

Limited Cu(II) binding to biochar DOM: Evidence from C K-edge NEXAFS and EEM-PARAFAC combined with two-dimensional correlation analysis

“…Despite numerous studies on the interactions of natural DOM with metal ions, only a few have focused on the biochar-derived DOM. For instance, Kim et al (2018) investigated the effects of biochar DOM on the mobility of arsenic (As) in soil and concluded that biochar produced at low temperature (300°C) could release a large amount of DOM and enhance the reductive dissolution of Fe and the mobilization of As. Regarding the intrinsic interaction between biochar-derived DOM and heavy metals, Huang et al (2019) compared the Cu and Cd binding behavior of different DOM components derived from rice straw biochar and found that the metalbinding sequence was highly related to both heavy metal elements and DOM components.…”

Assessment of biochar and zero-valent iron for in-situ remediation of chromated copper arsenate contaminated soil

“…Biochar, a solid produced by pyrolysis of organic material, has gained particular interest as a cheap and effective amendment for remediation of cationic pollutants such as Cu, mainly by increasing pH and providing additional sorption sites (Beesley et al, 2011;Buss et al, 2012;Ippolito et al, 2012;Lehmann and Joseph, 2015). However, biochar may not work equally well for anionic trace element contaminants, as previous studies have observed an increase in bioavailability and mobility of As (Beesley et al, 2010;Hartley et al, 2009;Kim et al, 2018;Wang et al, 2017). Rather, iron-bearing compounds such as zero-valent iron (ZVI) have proven more useful for in-situ stabilization of As (Kumpiene et al, 2006;Miretzky and Cirelli, 2010;Nielsen et al, 2011).…”

Sorption and Degradation Potential of Pharmaceuticals in Sediments from a Stormwater Retention Pond

“…It is well known that sorption of pollutants is strongly affected by the matrix' content of organic matter, clay minerals, temperature and the pH [16][17][18]. Degradation is more associated with the activity of microorganisms present in the sediment-water system [18,19], where redox potential and oxygen condition are main factors [20][21][22][23]. Studies have already shown that stormwater retention ponds can reduce pollutants including polycyclic aromatic hydrocarbons (PAHs), heavy metals and biocides by processes like adsorption, sedimentation and degradation [24][25][26].…”