(1. 安徽工业大学 冶金减排与资源综合利用教育部重点实验室，马鞍山243000；
2. 安徽工业大学 化学与化工学院，马鞍山243002)
摘 要: 以含钛高炉渣(钛渣)为原料，以KOH和Fe2O3为改性剂，采用高温焙烧法进行矿物相重构，得到一种具有土壤修复功能的缓释肥料(重构钛渣)。结果表明：在模拟太阳光照150 min降解污染物的实验中，重构钛渣在营养元素溶出后对10 mg/L盐酸四环素溶液和10 mg/L亚甲基蓝溶液的降解效率分别为39.36%和49.84%。在重构钛渣的水溶出实验中，钾、钙、镁、铝和硅元素的溶出量分别为642、461.47、382.40、378.58和1165.18 mg/L，其硅溶出量超出国家硅肥标准量542.96 mg/L。植株的游离氨基酸含量由未施肥时的0.62%提高至0.65%，维生素含量由未施肥时的0.10%提高至0.22%。
关键字: 缓释肥料；含钛高炉渣；原位掺杂；矿物相重构；有机污染物
（1. Key Laboratory of Metallurgical Emission Reduction and Comprehensive Utilization of Resources, Ministry of Education, Anhui University of Technology, Ma’anshan 243000, China;
2. College of Chemistry and Chemical Engineering, Anhui University of Technology, Ma’anshan 243002, China）
Abstract:Using titania-containing blast furnace slag (Ti-slag) as raw material and using KOH and Fe2O3 as modifier, a kind of slow-release fertilizer with soil remediation function was obtained by high temperature roasting method via mineral phase reconstruction(refactoring Ti-slag). The results show that during the degradation experiment of organic pollutants after simulated sunlight irradiation for 150 min, the degradation rate of tetracycline hydrochloride solution (10 mg/L) by reconstruction of Ti-slag after leaching nutrient elements is 39.36%, the degradation rate of methylene blue solution (10 mg/L) is 49.84%. During the fertilizer efficiency test, the dissolved amount of potassium, calcium, magnesium, aluminum and silicon in the reconstructed Ti-slag are 642, 461.47, 382.40, 378.58 and 1165.18 mg/L, respectively, and the dissolved amount of silicon exceeds the national standard of silicon fertilizer by 542.96 mg/L. The content of free amino acids in chives increases from 0.62% without fertilization to 0.65% and the vitamin content increases from 0.10% without fertilization to 0.22%.
Key words: slow-release fertilizer; Ti-bearing blast-furnace slag; in situ doping; mineral phase reconstruction; organic pollutant
