[Hydrochemical and Isotopic Characteristics of the Lake Balkhash Catchment, Kazakhstan].

Lake Balkhash is one of the largest lakes in the world. It is located in arid Central Asia and receives major water from the Ili River, which is an international river flowing across China and Kazakhstan. Hydrochemical and isotopic measurements of waters can provide an improved understanding of hydrogeochemical processes and environmental characteristics, which is useful for water resource management in arid regions.

[Distribution of -alkanes from Lake Wanghu Sediments in Relation to Environmental Changes].

Concentrations and distribution of -alkanes (-C to -C) in Lake Wanghu sediment core were analyzed to investigate the environmental changes in the lake during the past~100 years. Relatively higher concentrations of mid-and long-chain -alkanes with a strong odd-over-even carbon number predominance indicated organic matter contributions dominated by aquatic macrophytes and terrestrial plants. The lower values of 2-C/(-C+-C) highlighted a type of landscape dominated by woody plants.

[Over One Hundred Year Sediment Record of Polycyclic Aromatic Hydrocarbons in the Lake Bosten, Xinjiang].

The vertical distributions of 16 polycyclic aromatic hydrocarbons (PAHs) were investigated from a sediment core in the Lake Bosten, Xinjiang. Meanwhile, the possible source and risk assessment of PAHs in Lake Bosten were also discussed. The total PAHs concentration in the sediment core ranged from 37.