The specimens were filled with 20ml of the corrosive medium: citric acid--phosphate buffer solution with sodium chloride and active carbon
. They were placed in a climate chamber for 12 hours at 85[degrees]C and 75% relative humidity, and then for another 12 hours at 23[degrees]C and 75% relative humidity.
The roots, while metabolically active, could contribute to the active carbon
fractions like DOC (through exudation and secretion) and MBC (indirectly through greater supply of substrates in rhizosphere) .
It is also well known that treatments with acidic solutions (of the precursor salts) as well as reduction treatments with hydrogen can modify the properties of the active carbons
Nederman also delivers solutions for efficient sand plant management and active carbon
filters for reducing odours.
The challenge for Egypt, struggling to revive an economy hit by an uprising that ousted Hosni Mubarak, is to develop the cost-effective technologies needed to convert the straw into pulp for paper, fertilizer, active carbon
or natural fiber plastic composites - and to convince farmers not to burn it.
It uses active carbon
or zeolites to adsorb the gas before burning it in a precious metal catalyst.
The OSC system employs a standalone triple or twin tower unit containing a buoyant, oleophilic (oilattracting) filter bag in its first stage and active carbon
The carbon powder is an amorphous active carbon
and the inert gas is nitrogen.
Ahlstrom has developed and patented a new technology consisting of a photocatalytic media combining a layer of active carbon
with a nonwoven, which successfully fixes the titanium dioxide, a natural catalyst.
To produce surface active carbon
, the remaining zinc must be removed from the surface, and high temperature processing is able to facilitate this (Chen et al., 1995).
Gas cleaning is carried out through a dry refining process that uses active carbon
, instead of the traditional wet method that utilizes water, increasing the gasification heat efficiency.
These plants, which have a total production capacity of 860,000 m3 per day, will be furnished with the latest technologies for rapid decanting, filtration over active carbon
and complete sludge treatment.The Qingdao contract brings to 17 the number of long-term water services contracts won by Ondeo in China.