CAJ | 학술논문

为了解决日益严重的锰矿浸渣污染问题,采用在锰矿浸渣中添加硅酸钠为固化剂,研究锰矿浸渣中可溶锰离子的稳定化效果.通过正交实验和单因素实验,考察了反应温度、反应时间、液固比、pH值、硅酸钠添加量等因素对可溶锰离子稳定化效果的影响.结果表明：硅酸钠的用量对可溶锰离子稳定化效果的影响最大,较适宜的稳定化条件为：反应温度30℃,反应时间15 min,液固比5：1,pH值8,硅酸钠用量0.5 g.在此条件下,20.00 g锰矿浸渣中的可溶锰离子固化率达96.80%,通过浸出毒性测试得到滤液中锰残余浓度为0.99 mg/L,完全符合GB8978-96《污水综合排放标准》.
위료해결일익엄중적맹광침사오염문제,채용재맹광침사중첨가규산납위고화제,연구맹광침사중가용맹리자적은정화효과.통과정교실험화단인소실험,고찰료반응온도、반응시간、액고비、pH치、규산납첨가량등인소대가용맹리자은정화효과적영향.결과표명：규산납적용량대가용맹리자은정화효과적영향최대,교괄의적은정화조건위：반응온도30℃,반응시간15 min,액고비5：1,pH치8,규산납용량0.5 g.재차조건하,20.00 g맹광침사중적가용맹리자고화솔체96.80%,통과침출독성측시득도려액중맹잔여농도위0.99 mg/L,완전부합GB8978-96《오수종합배방표준》.
In order to solve the increasingly serious pollution of manganese leaching slag, the effect of stabilizing treatment for the soluble manganese ion in manganese leaching slag using sodium sili-cate as curing agent was investigated. The influences of reaction temperature, reaction time, liquid-solid ratio, pH and sodium silicate dosage on the stabilization effects of soluble manganese ions were studied by orthogonal and single-factor experiments. The results showed that the dosage of sodium silicate had a great effect on the stabilizing process. And the optimal conditions could get the curing rate about 96 . 80% with 20. 00 g manganese leaching slag under the conditions of reaction tempera-ture 30 ℃, reaction time 15 min, liquid-solid ratio 5:1, pH 8, sodium silicate dosage 0. 5 g. The toxicity test result showed that the residual concentration of manganese in filtrate was 0. 99 mg/L, it fully meet the requirement of integrated wastewater discharge standard GB8978-96 .