Efficacy and limitations of low-cost adsorbents for in-situ stabilisation of contaminated marine sediment

Remediation and its biological responses of Cd contaminated sediments using biochar and minerals with nanoscale zero-valent iron loading

“…Effects of different materials on Cd immobilization, bacterial communities, enzyme activities, and DOM composition in sediments were investigated through incubation experiments. Based on the cost of remediation, level of Cd pollution in sediment, properties of remediation materials, and previous studies (Wang et al, 2019;Yang et al, 2019), the mass ratio of dry contaminated sediments and immobilization materials was set as 5%. Briefly, 200 g air-dried sediment and 10 g immobilization material were mixed thoroughly in 500 mL high-density polyethylene bottles.…”

“…Electrochemical remediation and washing are limited by the cost and scale of application (Beiyuan et al, 2017). Notably, in-situ immobilization has been considered an economic, simple, and eco-friendly technique (Wang et al, 2019). The choice of remediation materials is very important for in-situ immobilization of heavy metals in sediments.…”

Valorization of coal fired-fly ash for potential heavy metal removal from the single and multi-contaminated system

“…The discharge of heavy metals such as cadmium, lead, nickel, cobalt, copper, zinc, chromium and iron etc. has nowadays enhanced prominently, thus, diminishing the water eminence to the alarming levels (Wang et al., 2019a,b; Goswami et al., 2017a,b; Manikandan et al., 2016; Visa, 2016). Heavy metals are toxic and non-biodegradable pollutants which impose high toxicity even at a very low concentration and get accumulated in the food chain and adsorbed by the organisms resulting in severe health issues (Nebeská et al., 2018; Sathe et al., 2018; Kushwaha et al., 2019, 2017; Min et al., 2008).…”

Granular activated charcoal from peanut (Arachis hypogea) shell as a new candidate for stabilization of arsenic in soil

“…In situ metal stabilization by amendments with coal fly ash, green waste compost, etc. has been demonstrated as an appealing low-cost remediation strategy for contaminated soils (Tsang et al, 2014;Wang et al, 2018). So far, several stabilization mechanisms have been proposed in the literature, such as: (i) adsorption (e.g., humic substances, Fe(III)-oxyhydroxides); (ii) complexation (e.g., humic substances, EDTA); (iii) precipitation (e.g., phosphates) ( Klučaková and Omelka, 2004;Dong, et al, 2008;Janoš, et al, 2010).…”