Abstract
This research was conducted to evaluate the effectiveness of avocado pear biochar (APB) on the removal of DichlorovinylDimethlyPhosphate (also known as DDVP or Dichlorvos) pesticide in soil through bioremediation processes. Biochar prepared from avocardo pear was pyrolysed at 500°C. Experimental procedures were conducted to evaluate the effectiveness of adding biochar to soil by determining the concentration of Dichlorvos with effect of Contact time, Dosage and temperature using GC-MS. Effects of Contact time, Dosage and temperature on adsorption efficiency of APB were investigated. The results showed percentage removal of DDVP increased at different interval of time (34.52%, 51.10, 53.05% and 54.25% between 30minutes, 60minutes, 90minutes and 120 minutes respectively), dosage (62.43%, 83.15%, 90.91% and 95.65% at 2.0gram, 2.5gram, 3.0gram and 5.0gram respectively) and temperature (2.20%, 45.54%, 60.96% and 62.11% at 400C, 600C, 800C and 1000C respectively). The Langmuir and Freundlinch isotherm models described adsorption of DDVP and had best fit of R2 = 0.9337 and 0.9155 respectively.
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