荒漠土壤渗滤系统中再生水典型污染物变化规律研究
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摘要
土壤渗滤系统具有处理效果好、投资少等优点,适合再生水或经过预处理农村生活污水的处理,逐步成为国内外的研究热点。采用新疆准噶尔盆地边缘的荒漠-绿洲交错地带的土壤,利用室内土柱装置,研究城市再生水在荒漠土壤中渗滤后进出水水质与土壤污染物含量的变化特征,探讨土壤性质对再生水氨氮去除率和土壤污染物浓度变化的影响。结果表明,荒漠土壤对再生水氨氮等有显著的去除作用,且再生水经过土柱渗滤后,在60 cm处的出水氨氮浓度逐渐趋于稳定,但氨氮去除率随时间并不十分稳定,且不同土壤质地、组分与性质不同,对氨氮的去除效果有明显差异。同一土柱,对不同污染物去除作用也有很大差异。通过相关性分析可知,土壤中的CO_3~(2-)、HCO_3~-、Na~+、SO_4~(2-)、总磷、碱解氮与硝酸盐氮等指标含量对再生水氨氮的去除率及土壤中污染物浓度变化有明显的影响。研究结果为进一步研究荒漠土壤渗滤系统去除污染物机理、新疆再生水安全利用以及荒漠土壤渗滤系统的实践应用提供基础。
The soil infiltration system gradually becomes the research focus at home and abroad,as it has advantages such as good treatment effect and less investment,and is suitable for the treatment of reclaimed water or pretreated rural sanitary waste. This article,using soil from the desert-oasis ecotone on the edge of Junggar Basin in Xinjiang,and indoor soil column device,studies the variation characteristics of influent and effluent quality as well as soil pollutant content after reclaimed water infiltration in desert soil,and discusses the impact of soil property on the removal rate of ammonia nitrogen in reclaimed water and the variation of soil pollutant content. The results indicate that,desert soil has good removal effect of ammonia nitrogen in the reclaimed water,and the ammonia nitrogen concentration of effluent gradually becomes stable at 60 cm of soil column after the reclaimed water passes through the soil column,but the removal rate is not very stable as time goes. Besides,different soil textures,components and properties have quite different removal effects of ammonia nitrogen. The same soil column also has very different removal effects for different pollutants. According to the correlation analysis,the contents of indicators such as CO_3~(2-),HCO_3~-,Na~+,SO_4~(2-),total phosphorus,alkali-hydrolyzable nitrogen and nitrate nitrogen in soil have a remarkable effect on the removal rate of ammonia nitrogen in the reclaimed water and the variation of pollutant concentration in soil. The study results provide a basis for further study on the pollutant removal mechanism of desert soil infiltration system,safe utilization of reclaimed water in Xinjiang and the application of desert soil infiltration system.
The soil infiltration system gradually becomes the research focus at home and abroad,as it has advantages such as good treatment effect and less investment,and is suitable for the treatment of reclaimed water or pretreated rural sanitary waste. This article,using soil from the desert-oasis ecotone on the edge of Junggar Basin in Xinjiang,and indoor soil column device,studies the variation characteristics of influent and effluent quality as well as soil pollutant content after reclaimed water infiltration in desert soil,and discusses the impact of soil property on the removal rate of ammonia nitrogen in reclaimed water and the variation of soil pollutant content. The results indicate that,desert soil has good removal effect of ammonia nitrogen in the reclaimed water,and the ammonia nitrogen concentration of effluent gradually becomes stable at 60 cm of soil column after the reclaimed water passes through the soil column,but the removal rate is not very stable as time goes. Besides,different soil textures,components and properties have quite different removal effects of ammonia nitrogen. The same soil column also has very different removal effects for different pollutants. According to the correlation analysis,the contents of indicators such as CO_3~(2-),HCO_3~-,Na~+,SO_4~(2-),total phosphorus,alkali-hydrolyzable nitrogen and nitrate nitrogen in soil have a remarkable effect on the removal rate of ammonia nitrogen in the reclaimed water and the variation of pollutant concentration in soil. The study results provide a basis for further study on the pollutant removal mechanism of desert soil infiltration system,safe utilization of reclaimed water in Xinjiang and the application of desert soil infiltration system.
引文
[1]魏亮亮.改良土壤含水层处理系统对溶解性有机物的去除效能[D].哈尔滨:哈尔滨工业大学,2011.
[2]梅龙杰,嵇文晖,毛仝,等.土壤系统对污水的净化研究综述[J].广州化工,2017,45(4):23-24.
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[7]李屹,沈剑,林燕,等.土壤渗滤系统中污染物去除效果分析[J].生态与农村环境学报,2013,29(6):738-742.
[8]王书文,刘庆玉,焦银珠,等.生活污水土壤渗滤就地处理技术研究进展[J].水处理技术,2006,32(3):5-10.
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[10]王羽婷,张皓东,段小卫,等.土壤渗滤系统出水氨氮浓度不稳定的成因探究[J].安全与环境学报,2016,16(1):226-229.
[11]张思,宁国辉,杨铮铮,等.复合填料土壤渗滤系统处理农村生活污水的效果[J].环境工程学报,2014,8(11):4625-4630
[12]黄治平,龚明波,张克强,等.土壤净化床系统处理巢湖农村生活污水应用研究[J].水处理技术,2013,39(6):105-108.
[13]汪宏,严群,张越,等.分层填料地下渗滤系统生活污水处理研究[J].现代化工,2016,36(8):158-161,163.
[14]吴浩恩,魏才倢,吴为中.多级土壤渗滤系统处理低有机污染水的脱氮效果与机理解析[J].环境科学学报,2016,36(12):4392-4399.
[15]王鑫,李海波,孙铁珩.地下渗滤污水处理系统中基质的研究进展[J].环境科学与技术,2010,33(12):86-89.
[16]陈佳利,吴为中,杨春平,等.基于BDPs的多级土壤渗滤系统处理受污染河水的试验研究[J].环境科学学报,2012,32(4):909-915.
[17]魏才倢,吴为中,杨逢乐,等.多级土壤渗滤系统技术研究现状及发展[J].环境科学学报,2009,29(7):1351-1357.
[18]Onesios K M.Biological removal of pharmaceuticals and personal care products during laboratory soil aquifer treatment simulation with different primary substrate concentrations[J].Water Res.,2012,46(7):2365-2375.
[19]潘洁.改性膨润土用于城市污水处理厂二级出水深度处理的实验研究[D].武汉:中国地质大学,2010.
[20]赵庆良,谢春媚,魏亮亮,等.二级处理出水中DOM在粉煤灰改性SAT系统中的去除[J].哈尔滨工业大学学报,2012,44(4):32-38.
[2]梅龙杰,嵇文晖,毛仝,等.土壤系统对污水的净化研究综述[J].广州化工,2017,45(4):23-24.
[3]Fox P,Aboshanp W,Alsamadi B.Analysis of soils to demonstrate sustained organic carbon removal during soil aquifer treatment[J].J Environ Qual,2005,34(1):156-163.
[4]林春野,何孟常.污水土壤含水层处理系统原理、管理、效率和应用[J].环境污染治理技术与设备,2006,7(2):1-8.
[5]Idelovitch E,Icekson-Tal N,Avraham O,et al.The long-term performance of soil aquifer treatment(SAT)for effluent reuse[J].Water Supply,2003,3(4):239-246.
[6]金亚若,万红友.浅析土壤渗滤技术在再生水处理中的应用[J].环境科学导刊,2012,31(6):72-77.
[7]李屹,沈剑,林燕,等.土壤渗滤系统中污染物去除效果分析[J].生态与农村环境学报,2013,29(6):738-742.
[8]王书文,刘庆玉,焦银珠,等.生活污水土壤渗滤就地处理技术研究进展[J].水处理技术,2006,32(3):5-10.
[9]金丹越,张登峰,卢少勇,等.污水土壤渗滤技术研究进展[J].中国农学通报,2007,23(4):350-354.
[10]王羽婷,张皓东,段小卫,等.土壤渗滤系统出水氨氮浓度不稳定的成因探究[J].安全与环境学报,2016,16(1):226-229.
[11]张思,宁国辉,杨铮铮,等.复合填料土壤渗滤系统处理农村生活污水的效果[J].环境工程学报,2014,8(11):4625-4630
[12]黄治平,龚明波,张克强,等.土壤净化床系统处理巢湖农村生活污水应用研究[J].水处理技术,2013,39(6):105-108.
[13]汪宏,严群,张越,等.分层填料地下渗滤系统生活污水处理研究[J].现代化工,2016,36(8):158-161,163.
[14]吴浩恩,魏才倢,吴为中.多级土壤渗滤系统处理低有机污染水的脱氮效果与机理解析[J].环境科学学报,2016,36(12):4392-4399.
[15]王鑫,李海波,孙铁珩.地下渗滤污水处理系统中基质的研究进展[J].环境科学与技术,2010,33(12):86-89.
[16]陈佳利,吴为中,杨春平,等.基于BDPs的多级土壤渗滤系统处理受污染河水的试验研究[J].环境科学学报,2012,32(4):909-915.
[17]魏才倢,吴为中,杨逢乐,等.多级土壤渗滤系统技术研究现状及发展[J].环境科学学报,2009,29(7):1351-1357.
[18]Onesios K M.Biological removal of pharmaceuticals and personal care products during laboratory soil aquifer treatment simulation with different primary substrate concentrations[J].Water Res.,2012,46(7):2365-2375.
[19]潘洁.改性膨润土用于城市污水处理厂二级出水深度处理的实验研究[D].武汉:中国地质大学,2010.
[20]赵庆良,谢春媚,魏亮亮,等.二级处理出水中DOM在粉煤灰改性SAT系统中的去除[J].哈尔滨工业大学学报,2012,44(4):32-38.