新疆矿产资源丰富，其开发和冶炼废水中所含重金属对人类健康和环境危害巨大。微藻处理矿山废水中的重金属具有高效低成本等优势，因此利用新疆荒漠中的土著蓝藻进行重金属污染修复潜力巨大。钙化过程对藻类吸收重金属影响机制尚不清楚。本研究拟以新疆荒漠中分离出的具有钙化性的念珠藻（Nostoc sp.）为对象，在处理新疆典型含Cd2+矿山废水环境下，通过研究念珠藻胞内蛋白和胞外聚合物（EPS）对钙化过程的影响，胞内蛋白、EPS及钙化过程对Cd2+的协同作用机理，从而揭示钙化念珠藻对重金属Cd2+的去除机制，为实现高效低成本的微藻处理矿山废水处理技术提供理论基础。

Xinjiang is abundant in mineral resources. Heavy metals in mine wastewater pose great threat to human health and the environment. Treatment of heavy metal in mine wastewater by microalgae has the advantage of high efficiency as well as low cost，thus it is promising to remediate heavy metal pollution by using local blue-green algae from Xinjiang deserts. The effect of calcification on the adsorption of heavy metal by microalgae cell is unclear, and the mechanism remains unknown. In this project, the calcifying Nostoc sp. isolated from Xinjiang deserts will be used to treat typical Cd2+ mine wastewater in Xinjiang. Through the investigation of the effect of cellular proteins, and extracellular polymeric substances (EPS) on calcification of Nostoc sp. and synergistic action of EPS and calcification on removal of Cd2+, the removal mechanism of Cd2+ by Nostoc sp. will be revealed. The research will provide fundamental basis for large-scale treatment of copper mine wastewater, and help achieving high efficient and low cost technology.