砒砂岩特征及其资源利用

Features and utilization of arsenic sandstone

砒砂岩集中分布在黄土高原北部晋、陕、内蒙古接壤地区的鄂尔多斯高原,该区域是黄河粗泥沙主要来源区。砒砂岩遇水即膨胀特性破坏岩石结构,极易产生水土流失。国家为此启动科技支撑计划"黄河中游砒砂岩区抗蚀促生技术集成与示范"项目研究并取得成果。结合该项目初步研究成果,分析了砒砂岩岩性特征及物质成分,以"砒砂岩资源"新思路找出了其资源利用途径,开展了抗蚀促生治理途径的探索,对于变砒砂岩之"毒"为利、实现根治砒砂岩区粗泥沙之源,保障黄河安澜具有十分重要的意义。

Arsenic sandstones are mostly distributed in the Ordos Plateau where is located at the northern part of Loess Plateau and the border of Shanxi, Shaanxi and Inner Mongolia. The coarse sediments in the Yellow River mainly come from the region. The structure of arsenic sandstone is easy to be damaged due to the expansion of sand under the influence of water, resulting in soil and water loss. Therefore, the project called ＂Technologies and Demonstration for Anti-erosion and Ecological Recovery in Arsenic Sandstone Zone in the Middle Reaches of the Yellow River＂ was initiated under the National Sci-Tech Support Plan. Based on the outcome of the project, studies are made on the features and material composition of arsenic sandstone as well as new approaches of turning it into resources. Solutions for an tierosion and ecological recovery are exploited that should be of great significance to the safety to the Yellow River by turning the harm of arsenic sandstone into good and control the coarse sediments from the source.