钛白粉厂废酸渣的表征及在水污染治理中的应用

Characteristics and Application of Waste Residue from the Synthetic Rutile Industry in the Treatment of Wastewater

试验对钛白粉厂石灰中和后的废酸渣进行了一系列的特性分析,并通过圆柱试验了解其对水中溶解性有机碳(DOC)和营养物质的去除能力。为了保证试验圆柱有良好的透水性,在废酸渣试验圆柱中添加了石英砂,并设置了石英砂对比圆柱。通过145 d试验,废酸渣/石英砂对水中DOC、TP、PO4-P、TN、NH3-N、NOx-N和DON的累计去除率分别为88.9%、94.9%、99.1%、63.5%、-107.3%、71.2%和77.7%,石英砂对水中DOC、TP、PO4-P、TN、NH3-N、NOx-N和DON的累积去除率分别为-0.3%、-50.1%、-44.8%、-10.8%、-298.2%、86.3%和-28.5%,通过计算得出废酸渣对水中DOC、TP、PO4-P、TN、NH3-N、NOx-N和DON的累积去除率分别为88.9%、96.6%、99.4%、67.1%、47.9%、-110.1%和82.7%。试验表明,钛白粉厂石灰中和后的废酸渣对水中的有机物和营养物质有很好的去除效果,尤其是对DOC、TP、PO4-P、TN、NH3-N和DON的去除,在水污染治理领域有很好的应用前景。

A series of analyses were conducted to characterise neutralized acid residue from the synthetic rutile industry.Column sorption experiments were conducted to investigate the attenuation of DOC and nutrients in wastewater using neutralized acid residue.After 145 days,DOC,TP,PO4-P,TN,NH3-N,NOx-N and DON in neutralized acid residue/sand column eluent were reduced by 88.9%,94.9%,99.1%,63.5%,-107.3%,71.2% and 77.7%.DOC,TP,PO4P,TN,NH3-N,NOxN and DON in sand column eluent were reduced by-0.3%,-50.1%,-44.8%,-10.8%,-298.2%,86.3% and-28.5%.The calculational removal rate of DOC,TP,PO4-P,TN,NH3-N,NOx-N and DON by neutralized acid residue are 88.9%,96.6%,99.4%,67.1%,47.9%,-110.1% and 82.7%. Neutralized acid residue exhibits good sorption of DOC and nutrients.Neutralized acid residue may be of benefit in reducing water pollution.