Environmental Engineering Reference
In-Depth Information
F i g . 5
Sodding, a bioengineering technique that uses
grass mats for soil stabilization and erosion control.
Perennial grasses are preferred. Grasses with sturdy
adventitious root mat stabilize metalliferous soil. To
anchor perennial solid binding grass mats to a slope, mats
are cut to desirable sizes (1 × 1 ft). This technique would
be benefi cial to stabilize the contaminated soil
V. zizanioides
is one of the best choices for
revegetation of Pb/Zn mine tailings due to its high
metal tolerance (Chen et al.
2004
; Truong
2004
).
Ron Phibun District, Nakhon Si Thammarat
Province; (2) lead (Pb) contamination in Klity Creek
in the Thung Yai Naresuan Wildlife Sanctuary,
Thong Pha Phum District, Kanchanaburi Province;
and (3) highly elevated cadmium (Cd) concentrations
in paddy soil in the Mae Sot District, Tak Province
(Fig.
6
). Therefore, the Department of Primary
Industries and Mines (DPIM), a governmental
organization responsible for mining and mineral
processing, prepared technical guidelines for envi-
ronmental management and rehabilitation. These
guidelines concentrate on using biogeotechnolo-
gies for reclamation of mine waste, green mining
policy, and sustainable development (Table
2
).
3
Phytomitigation
of Abandoned Mines
and Mine Waste
Thailand is rich in metal resources such as gold,
zinc, silver, iron, tungsten, tin, antimony, copper,
and lead (Table
1
). Thailand is challenged with
three important environmental problems due to
mining activity as (1) arsenic (As) contamination in
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