Chemical weathering and CO consumption rates of rocks in the Bishuiyan subterranean basin of Guangxi, China.

To investigate the influence of chemical weathering on CO consumption, an analysis was performed of water chemistry by applying water chemistry equilibria methods in the Bishuiyan subterranean basin, SW China. The average value of total ion concentrations (TZ) was 1,854.97 μEq/L, which was significantly higher than the global average value (TZ = 1,250 μEq/L).

[Response Mechanism of Trace Metals in the Bishuiyan Subterranean River to the Rainfall and Their Source Analysis].

High-frequency sampling was conducted at the outlet of Guangxi Bishuiyan karst subterranean river using an automatic sampler during the rainfall events. The hydrochemical drymanic variation characteristics of trace metals (Cu, Pb, Zn, Cd) at the outlet of Guangxi Bishuiyan karst subterranean river were analyzed, and the sources of the trace metals in the subterranean river as well as their response to rainfall were explored. The results showed that the rainfall provoked a sharp decrease in the major elements (Ca²⁺, Mg²⁺, HCO₃⁻, etc.