Developing reliable methods for the design of the immobilization of heavy metals in soil : for the application to heterogeneous systems.

用表面络合模型研究了pH、共存物质等因素对砷在硅藻土上吸附的影响。研究发现，在非均质水分布中，污染物的扩散出流服从指数为-1.0~-0.5的幂函数，而在规则系统中，扩散指数为-0.5。此外，我们还通过实验室实验验证了屏障系统用于固定化的有效性。我们成功地构建了多个子模型，用于异质污染场地的固定化设计。

We summarized the effects of pH, coexisting substances, etc. on the adsorption of arsenic on the adsorbent, schwertmannite, with surface complex model. We found that in the heterogeneous water distribution, diffusive efflux of pollutants obeys power law with the exponent ranging from minus 1.0 to minus 0.5, whereas in regular systems the exponent is fixed to minus 0.5. In addition, we validated the effectiveness of barrier system for immobilization with laboratory experiments. We successfully constructed several sub-models for the design of immobilization in heterogeneous polluted sites.