Friday, July 10, 2009

Tetrachloroethylene (TCE) movement in soil

A 2-D tank model was used to model the movement of DNAPL (tetrachloroethylene, TCE) in various soil conditions. TCE was dyed using Sudan V to produce strong red color to visualize its movement in the tank. The soil heterogeneities such as clay lenses, bedding planes, unsaturated-saturated zone are discovered to influence the migration pattern of DNAPL in soil.

Photo shows the migration of TCE in soil with clay lenses

The downward movement of TCE is retarded by the water table. It migrates laterally along the surface of the water table until its self weight (due to gravity) will overcome the capillary pressure and move to the bottom of the tank.

Posted by Picasa

Wednesday, July 1, 2009

Sg Lembing ex-mining site: Revisited July 1st 2009

A pile of gunny sacks full of tailings just next to a small stream

Red nasty water traps in the man-made pool that was used in processing the ore. pH is between 3-4.

A nice view of Sg Lembing Museum as part of the major attractions of Sg Lembing

Mine adit no 4, considered as dangerous and armed!!
Posted by Picasa

Kerubung Landfill Melaka

Visiting Kerubung Landfill in Melaka as part of the EIA preparation for Sg Udang Sanitary Landfill. This landfill is considered as Level 1 and located adjacent to major road to Sg Udang. The landfill is operated by Southern Waste Sdn Bhd.

Posted by Picasa

EIA Project for Sg. Udang Landfill in Melaka

I visited a proposed site for sanitary landfill in Sg. Udang Melaka on 29 June 2009 (Monday). The project is managed by Jabatan Pengurusan Sisa Pepejal Negara and UKMP has been requested to prepare Detailed Environmental Impact Assessment prior to the development of the project.

Posted by Picasa