Jarvis A P, Moustafa M, Orme P H A, Younger P L
Hydrogeochemical Engineering Research and Outreach Group, Institute for Research on Environment and Sustainability, Devonshire Building, University of Newcastle, Newcastle upon Tyne NE1 7RU, UK.
Environ Pollut. 2006 Sep;143(2):261-8. doi: 10.1016/j.envpol.2005.11.028. Epub 2006 Jan 27.
A permeable reactive barrier (PRB) for remediation of coal spoil heap drainage in Northumberland, UK, is described. The drainage has typical chemical characteristics of pH<4, [acidity]>1400 mg/L as CaCO3, [Fe]>300 mg/L, [Mn]>165 mg/L, [Al]>100mg/L and [SO4]>6500 mg/L. During 2 years of operation the PRB has typically removed 50% of the iron and 40% of the sulphate from this subsurface spoil drainage. Bacterial sulphate reduction appears to be a key process of this remediation. Treatment of the effluent from the PRB results in further attenuation; overall reductions in iron and sulphate concentrations are 95% and 67% respectively, and acidity concentration is reduced by an order of magnitude. The mechanisms of attenuation of these, and other, contaminants in the drainage are discussed. Future research and operational objectives for this novel, low-cost, treatment system are also outlined.
本文介绍了英国诺森伯兰郡用于修复煤矸石堆排水的渗透性反应屏障（PRB）。该排水具有典型的化学特征：pH值小于4，以碳酸钙计的酸度大于1400毫克/升，铁含量大于300毫克/升，锰含量大于165毫克/升，铝含量大于100毫克/升，硫酸根含量大于6500毫克/升。在两年的运行过程中，PRB通常能去除该地下矸石排水中50%的铁和40%的硫酸盐。细菌硫酸盐还原似乎是这种修复的关键过程。对PRB流出物的处理导致进一步的污染物减少；铁和硫酸盐浓度的总体降低分别为95%和67%，酸度浓度降低了一个数量级。文中讨论了排水中这些以及其他污染物的衰减机制。还概述了这种新型低成本处理系统未来的研究和运行目标。
