TY - JOUR

T1 - Biochar concomitantly increases simazine sorption in sandy loam soil and lowers its dissipation

AU - Cheng, Hongguang

AU - Jones, David

AU - Hill, Paul

AU - Bastami, Mohd Saufi

PY - 2017

Y1 - 2017

N2 - Biochar application has been receiving much attention as pesticide pollution mitigator because it reduces harmful chemicals. However, direct comparisons between the effect of biochar and straw on the simazine fate in soils remain poorly understood. We explored the impact of biochars and straw on the simazine behavior in a soil using a C-14 labeling approach. Biochar was produced by the thermal treatment of wheat straw at four contrasting temperatures (250, 350, 450 and 550 degrees C) and was incorporated into a sandy loam soil. The sorption of simazine in the biochar soil from 83.9% to 87.5% was significantly higher than 43.0% in the unamended soil and 35.7% in the soil amended with unprocessed straw, thus resulting in low samizine leaching from 21.8% to 42.6% in the biochar soil. However, biochar application suppressed the simazine decomposition, which is contrast in the straw soil. Furthermore, the biogeochemical behavior of simazine varied with the pyrolysis temperature. These results indicate biochar application can significantly increase simazine adsorption and reduce leaching, which is benefit to the environmental pollution. In conclusion, the simazine behaviors in the soil are strongly influenced by the biochar properties. In comparison to straw, biochar has potential to mitigate simazine pollution.

AB - Biochar application has been receiving much attention as pesticide pollution mitigator because it reduces harmful chemicals. However, direct comparisons between the effect of biochar and straw on the simazine fate in soils remain poorly understood. We explored the impact of biochars and straw on the simazine behavior in a soil using a C-14 labeling approach. Biochar was produced by the thermal treatment of wheat straw at four contrasting temperatures (250, 350, 450 and 550 degrees C) and was incorporated into a sandy loam soil. The sorption of simazine in the biochar soil from 83.9% to 87.5% was significantly higher than 43.0% in the unamended soil and 35.7% in the soil amended with unprocessed straw, thus resulting in low samizine leaching from 21.8% to 42.6% in the biochar soil. However, biochar application suppressed the simazine decomposition, which is contrast in the straw soil. Furthermore, the biogeochemical behavior of simazine varied with the pyrolysis temperature. These results indicate biochar application can significantly increase simazine adsorption and reduce leaching, which is benefit to the environmental pollution. In conclusion, the simazine behaviors in the soil are strongly influenced by the biochar properties. In comparison to straw, biochar has potential to mitigate simazine pollution.

KW - Black char; biodegradation; leaching; pyrolysis; sorption

U2 - 10.1080/03650340.2016.1261117

DO - 10.1080/03650340.2016.1261117

M3 - Article

VL - 63

SP - 1082

EP - 1092

JO - Archives of Agronomy and Soil Science

JF - Archives of Agronomy and Soil Science

SN - 0365-0340

IS - 8

ER -