盐碱化土壤处理含铬酸性废水研究

 为研究含铬酸性废水和盐碱化土壤综合利用时土壤改良情况以及铬的形态变化,采用土柱充压渗透装置模拟酸性污水渗透通过不同pH值的盐碱土进行实验,对pH值、ORP值(氧化还原电位)、ESP(碱化度)及土柱中钙镁离子之和,铬的不同形态和有机质含量等指标进行测定分析,结果表明：含铬酸性废水渗透通过盐碱土,使盐碱地趋于中性土壤,酸性污水渗透过盐碱土不会降低土壤本身有机质和钙镁的含量;酸性污水中的铬在通过盐碱土后,迁移能力总体较弱,说明盐碱地对含铬酸性废水处理具有明显效果,同时也能够改良盐碱土。

Experimental Processing of Chromium-contented Acid Wastewater with the Saline-alkali Soil

In order to research the saline-alkali soil ameliorating status and species changes of chromium during comprehensive utilization of chromium-contented acid wastewater with saline-alkali soil, permeation and pressure equipments are adopted to simulate the process of chromium-contented acid wastewater permeating through different pH saline-alkali soils. By the assaying and analyzing some indicators of pH, ORP, ESP, sum of Ca²⁺ and Mg²⁺, organic matter, and the different factions of Cr, test results show that the course of chromium-contented acid wastewater permeating through saline-alkali soil makes saline-alkali soil tend to be neutral. And it would not reduce soils autologous organic matter and the levels of Calcium and Magnesium. The overall migratory capacity of Cr in the acid waste water is weak. It states that the saline-alkali soil has an obvious effect on the chromium-contented acid wastewater treatment, and the saline-alkali soil is also ameliorated.