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Phosphorus release from phosphate rock and iron phosphate by low-molecular-weight organic acids 总被引:1,自引:0,他引:1
Low-molecular-weight(LMW) organic acids widely exist in soils, particularly in the rhizosphere. A series of batch experiments were carded out to investigate the phosphorus release from rock phosphate and iron phosphate by low-molecular-weight organic acids.Results showed that citdc acid had the highest capacity to solubilize P from both rock and iron phosphate. P solubUization from rock phosphate and iron phosphate resulted in net proton consumption. P release from rock phosphate was positively correlated with the pκa values. P release from iron phosphate was positively correlated with Fe-organic acid stability constants except for aromatic acids, but was not correlated with pκa. Increase in the concentrations of organic acids enhanced P solubilization from both rock and iron phosphate almost linearly. Addition of phenolic compounds further increased the P release from iron phosphate. Initial solution pH had much more substantial effect on P release from rock phosphate than from iron phosphate. 相似文献
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循环使用废钢铁节能、环保,2009年1—9月,我国废钢进口总量为1119万t,远远超出2008年全年进口359万t的总量,并且恢复到2004年、2005年的历史最好水平。进口废钢的迅猛增长说明国内废钢市场逐渐回暖,但废钢真的火起来了吗? 相似文献
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探讨了铁矿石原位生成的Fe基催化剂对硫酸盐木质素催化热解的情况。研究使用透射电子显微镜对反应前后的催化剂进行表征,以探究催化剂形态变化;通过分段热解反应器联合飞行时间质谱评估催化剂的性能。结果表明,反应前催化剂呈颗粒状,而反应后催化剂几乎烧结。与未还原铁矿石和商业Fe2O3相比,还原铁矿石显著促进了单环芳香烃的产生。在最优反应温度550℃下,单环芳香烃的相对含量高达到81%,其中苯、甲苯、二甲苯和三甲基苯的相对含量分别为46%、34%、13%和7%。基于脱羟基和脱甲氧基的反应原理,提出了硫酸盐木质素催化热解的可能途径。使用的低成本铁矿石催化剂有望应用于硫酸盐木质素热解,以生产有价值的生物基芳香烃。 相似文献
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钢铁冶炼生产中的原辅材料简称为冶金炉料。它通常包含铁矿石、废钢、生铁、焦炭、铁合金等。“十一五”以来我国钢铁工业蓬勃发展,钢铁产量连年增长,冶金炉料货紧价扬,多数品种供求两旺。 相似文献