广西北部湾典型入海河流上中下游城市河段沉积物碳氮磷富集特征
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摘要
通过对广西北部湾典型入海河流南流江上、中、下游城市河段表层沉积物碳、氮、磷的调查分析,揭示其富集特征,并利用单因子直接评价法、内梅罗综合污染指数法与有机指数法对沉积物污染状况进行了评价。结果表明:(1)上游河段沉积物中总有机碳(TOC)、总碳(TC)、总氮(TN)、总磷(TP)平均质量浓度分别为9.2、21.4、1.6、0.126g/kg,中游河段分别为13.9、23.8、1.1、0.083g/kg,下游河段分别为9.8、12.6、0.9、0.082g/kg。(2)从Pearson相关分析可知,TP、TN、TC、总无机碳(TIC)两两间均具有显著相关性,表明碳、氮、磷的来源具有一定的同源性。(3)从单因子评价结果看,TN污染最严重;从内梅罗综合污染指数来看,中游河段污染最严重,上游次之,下游最优;从有机指数来看,3个城市河段总体均处于Ⅲ级(高营养)水平。
Based on the survey of surface sediment nutrients(C,N,P)in urban parts along upriver to downriver of a typical river bounding for sea in Beibu Gulf,namely Nanliujiang River,enrichment characteristics were analyzed.The pollution status was assessed by using single-factor index,Nemerow index and organic index.Results showed that:(1)the mass concentrations of TOC,TC,TN,TP in upriver were 9.2,21.4,1.6,0.126g/kg,respectively;those in midriver 13.9,23.8,1.1,0.083g/kg,respectively;those in downriver 9.8,12.6,0.9,0.082g/kg,respectively.(2)Based on the Pearson correlation analysis,TP,TN,TC and TIC were all significantly correlated,indicating that carbon,nitrogen and phosphorus might come from the same sources.(3)Single-factor index showed that TN was the most polluted factor;as Nemerow index showed,midriver was the most polluted parts,while upriver second and downriver third;from organic index,the urban parts of Nanliujiang River were at high level nutrition pollution(Level Ⅲ).
Based on the survey of surface sediment nutrients(C,N,P)in urban parts along upriver to downriver of a typical river bounding for sea in Beibu Gulf,namely Nanliujiang River,enrichment characteristics were analyzed.The pollution status was assessed by using single-factor index,Nemerow index and organic index.Results showed that:(1)the mass concentrations of TOC,TC,TN,TP in upriver were 9.2,21.4,1.6,0.126g/kg,respectively;those in midriver 13.9,23.8,1.1,0.083g/kg,respectively;those in downriver 9.8,12.6,0.9,0.082g/kg,respectively.(2)Based on the Pearson correlation analysis,TP,TN,TC and TIC were all significantly correlated,indicating that carbon,nitrogen and phosphorus might come from the same sources.(3)Single-factor index showed that TN was the most polluted factor;as Nemerow index showed,midriver was the most polluted parts,while upriver second and downriver third;from organic index,the urban parts of Nanliujiang River were at high level nutrition pollution(Level Ⅲ).
引文
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[3]李杰,彭福利,丁栋博,等.湘江藻类水华结构特征及对重金属的积累[J].中国科学:C辑生命科学,2011,41(8):669-677.
[4]HOLLIGAN P M,DE BOOIS H.Land ocean interactions in the coastal zone(LOICZ)science plan[R].Stockholm:IGBP,1993.
[5]广西壮族自治区水利厅.2010广西壮族自治区水资源公报[R].南宁:广西壮族自治区水利厅,2010.
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[8]周怀东,彭文启.水污染与水环境修复[M].北京:化学工业出版社,2005.
[9]鲍士旦.土壤农化分析[M].3版.北京:中国农业出版社,2008.
[10]包耀贤,徐明岗,吕粉桃,等.长期施肥下土壤肥力变化的评价方法[J].中国农业科学,2012,45(20):4197-4204.
[11]涂剑成,赵庆良,杨倩倩.东北地区城市污水处理厂污泥中重金属的形态分布及其潜在生态风险评价[J].环境科学学报,2012,32(3):689-695.
[12]广西土壤肥料工作站.广西土壤[M].南宁:广西科学技术出版社,1991.
[13]王永华,钱少猛,徐南妮,等.巢湖东区底泥污染物分布特征及评价[J].环境科学研究,2004,17(6):22-26.
[14]CHHATRE S,PUROHIT H,SHANKER R,et al.Bacterial consortia for crude oil spill remediation[J].Water Science&Technology,1996,34(10):187-193.
[15]刘月英.中国经济动物志:淡水软体动物[M].北京:科学出版社,1979.
[16]官宝红,李君,曾爱斌,等.杭州市城市土地利用对河流水质的影响[J].资源科学,2008,30(6):857-863.