Water vapor flux is one of the most important and the most fundamental ecological factors affecting carbon recycling in wetland ecosystem and is therefore closely related to net CO_2 exchange in wetland ecosystem.

Based on the samples taken from the Changjiang drainage basins on the eastern Qinghai-Xizang Plateau in May and June of 2000,2001 and 2002,the continental chemical weathering flux,chemical denudation rates and net CO2 consumption rates for individual basins are generalized as follows.

The CO2 hardening sodium silicate was modified using 1# modified resin containing carbonyl and carboxyl,2# modified resin containing benzene,hydroxyl and formylphenyl,3# modified amide resin as modifier for refining gel particles.

Investigations were performed to determine the effects of heating rate,pyrolysis temperature,and pyrolysis rate on the chars,CO_2 gasification reactivity as measured by temperature-programmed thermogravimetry.