Effect of fly ash and bagasse charcoal on the mobility of atrazine in Indian sandy loam soil

Abstract

The study was undertaken to obtain an objective and realistic overview of atrazine residue reduction in sandy loam soil using two low-cost adsorbents. Fly ash and bagasse charcoal are waste products of thermal power plant and sugar mill, respectively, and are abundant, which have a disposal problem. A laboratory-based adsorption and leaching experiments were carried out to know the percentage reduction of atrazine by mixing these two abundant materials in soil at 1% level. In adsorption and leaching studies, atrazine 50% WP was used to know the reduction of atrazine concentration in fresh soil and soil with adsorbent. It was found that adsorbent mixed soil adsorbed atrazine greater than the fresh soil and the mobility of atrazine was reduced in adsorbent mixed soil as compared to fresh soil. It was concluded that the reduction of atrazine in adsorbent mixed soil was attributed due to the adsorption properties of these adsorbents as well as reducing the porosity of soil. Hence, these adsorbents were chosen to reduce the leachability of atrazine in low organic carbon soil, which has a great potential to groundwater contamination.

Adsorption characteristics of atrazine on different soils in the presence of Cd(II)

“…The content of soil organic matter of albic, black, and saline-alkaline soil was about 14.54, 30.10, and 6.8 g/kg and CEC was 22.63, 22.32, and 15.56 mol/kg, respectively. The pH value, TOC, and CEC can affect the adsorption of Cd(II) in soils, and low pH is conducive to the adsorption of Cd(II) in soils (Liang et al., 2017; Sharma et al., 2015). Saline-alkaline soil has the lowest organic matter and strong alkalinity.…”

Appropriate technology for soil remediation in tropical low-income countries - a pilot scale test of three different amendments for accelerated biodegradation of diesel fuel in Ultisol

“…Strategies for appropriate bioremediation technology under such circumstances should be based primarily on solar energy and the embodied chemical energy of the organic pollutant itself to power the degradation process (Haller et al, 2018). Using locally available resources such as waste products in combination with in situ bioremediation technologies are also appropriate ways to keep environmental impacts as well as energy and material costs down (Haller, 2017;Joshi & Ahmed, 2016;Sharma et al, 2015). The innately high soil temperatures in tropical regions make implementation of in situ soil remediation particularly interesting since the activation energy of many biochemical transformations is in the order of 50 kJ mol −1 which implies that every 10°C increase in temperature gives an approximate doubling of the degradation rate.…”