海口市五源河底泥分析评价及资源化利用研究
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摘要
选取五源河上、中、下游底泥进行取样,系统分析底泥样品的物理参数、营养参数、有机污染物和重金属。分析结果表明,底泥中有机质含量达到土壤三级标准,中游底泥样品有机质含量最高(34.4 g/kg),底泥中有机磷和速效钾含量丰富达到土壤一级水平,但有效氮含量匮乏,仅达到土壤五级水平,样品中未检出有机污染物。重金属污染采用潜在生态危害指数评价法进行评价,评价结果表明测试底泥中Cd<8,RI<150,属于清洁水平。综合分析底泥物理参数、营养参数和污染物水平,五源河上下游底泥可做建筑填土使用,中游底泥可做种植土壤利用,但应适当补充氮肥。
Sediments were selected from the upper, middle and lower reaches of the Wuyuan River, and the physical parameters, nutrient parameters, organic pollutants and heavy metals were analyzed. The results showed that the organic matter content in sediments reached the third-grade soil standard, and the organic matter content of midstream sediment samples was the highest(34.4 g/kg). The content of organic phosphorus and available potassium in sediments was rich enough to reach the first-grade soil level, but the content of available nitrogen was scarce, reaching the fifth-grade soil level, and no organic pollutants were detected in the samples. The pollution condition and potential ecological risk of heavy metals were evaluated through potential ecological risk index evaluation method. The results showed that the pollution degree was Cd<8 and potential risk index was RI < 150, the bottom muddies were in pollution-free levels. Based on the comprehensive analysis of sediment physical parameters, nutrient parameters and pollutant levels, the sediments in the upper and lower reaches of Wuyuan River could be used as materials for building fill, and the sediment in the middle reaches could be used as planting soil, but nitrogen fertilizer should be supplemented appropriately.
Sediments were selected from the upper, middle and lower reaches of the Wuyuan River, and the physical parameters, nutrient parameters, organic pollutants and heavy metals were analyzed. The results showed that the organic matter content in sediments reached the third-grade soil standard, and the organic matter content of midstream sediment samples was the highest(34.4 g/kg). The content of organic phosphorus and available potassium in sediments was rich enough to reach the first-grade soil level, but the content of available nitrogen was scarce, reaching the fifth-grade soil level, and no organic pollutants were detected in the samples. The pollution condition and potential ecological risk of heavy metals were evaluated through potential ecological risk index evaluation method. The results showed that the pollution degree was Cd<8 and potential risk index was RI < 150, the bottom muddies were in pollution-free levels. Based on the comprehensive analysis of sediment physical parameters, nutrient parameters and pollutant levels, the sediments in the upper and lower reaches of Wuyuan River could be used as materials for building fill, and the sediment in the middle reaches could be used as planting soil, but nitrogen fertilizer should be supplemented appropriately.
引文
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[3]张丽萍,袁文权,张锡辉.底泥污染物释放动力学研究[J].环境污染治理技术与设备,2003(2):22-26.
[4]敖静.污染底泥释放控制技术的研究进展[J].环境保护科学,2004,30(6):29-32,35.
[5]吴比,黄毅华,马君妍,等.河道水体水质对底泥污染物释放的影响[J].净水技术,2018,37(9):132-138.
[6]宋成涛,吴立志.沙河黑臭水体污染底泥清除标准分析[J].水运工程,2018(8):200-204,213.
[7]王凡,赵琛,潘海宁,等.城市黑臭水体底泥治理现状及建议[J].环境保护,2018,46(17):27-29.
[8]余灿.河道底泥环保疏浚方式及处理方案研究[J].科学技术创新,2018(12):95-96.
[9]王敬富,陈敬安,孙清清,等.底泥疏浚对阿哈水库内源污染的影响[J].环境工程,2018,36(3):69-73,147.
[10]颜昌宙,范成新,杨建华,等.湖泊底泥环保疏浚技术研究展望[J].环境污染与防治,2004,26(3):189-192,243.
[11] KORENTAJER. A review of the agricultural use of sewage sludge:Benefits and potent[J]. Research,1991,17(3):189-196.
[12]武博然,柴晓利.疏浚底泥固化改性与资源化利用技术[J].环境工程学报,2016,10(1):335-342.
[13]鲁如坤.土壤农业化学分析方法[M].北京:中国农业科技出版社,2000.
[14]赵兰凤,刘小锋,张池,等.土壤农化分析实验方法的改进与探索[J].实验室科学,2014,17(6):31-33.
[15]国家环境保护总局《水和废水监测分析方法》编委会.水和废水监测分析方法[M].北京:中国环境出版社,2013.
[16] HAKANSON L. An ecological risk index for aquatic pollution control:A sediment ecological approach[J]. Water Research,1980,14(8):975-1001.