APCS-MLR综合污染评价为研究邯郸市区大气降尘的污染状况,在3个功能区逐月采集了2年的大气降尘样品,分析了降尘中Al,Fe,Cd,Cr,Cu,Mn,Ni,Pb,Zn和As等10种金属元素的质量分数,使用正定矩阵因子分解模型(PMF)和绝对主成分-多元线性回归模型(APCS-MLR)解析其来源,并采用大气降尘重金属综合污染指数(IPI.dhm)模型评估8...
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潘东宣目前是青海省广厦建筑工程有限公司直接控股股东,持股比例为94.23%,是贵德园创项目运营管理有限公司直接控股股东,持股比例为50.09%;潘东宣间接持股贵德园创项目运营管理有限公司、投资占比达50.09%;目前潘东宣是13家企业最终受益人,包括其在投资青海省广厦建筑工程有限公司第四分公司最终收益股份为94.23%,投资青海省...
沉积物重金属来源解析正定矩阵因子分析模型(PMF)绝对主成分-多元线性回归(APCS-MLR)城市化,工业化和农业集约化的快速发展,导致排入近郊流域水体中的金属不断增多.为了及时阻断污染源头,制定有针对性的风险缓解措施,准确识别和量化复杂环境内沉积物中金属的污染来源显得尤其重要.对厦门杏林湾近郊流域水系表层沉积物中14个...
绝对因子得分-多元线性回归(APCS-MLR)正定矩阵因子分解(PMF)源解析基于开封市污灌与工业复合区农田表土样品,测定8种重金属(Cr,Ni,Cu,Zn,Cd,Pb,As和Hg)含量,利用绝对因子得分-多元线性回归(APCS-MLR)模型和正定矩阵因子分解(PMF)模型,结合相关性分析和系统聚类分析对土壤重金属来源和贡献率进行解析.结果表明:①...
为探究塔里木河上游沉积物中重金属的污染来源及潜在生态风险,选取上游阿拉尔—沙雅段表层沉积物为研究对象,测定Cu,Fe,Zn,Pb,As,Cr,Cd,Mn和Ni等9种重金属的含量,分析其污染及空间分布特征.结合相关性分析,聚类分析,绝对主成分-多元线性回归(APCS-MLR)和正定矩阵因子分析(PMF)等解析污染来源及其贡献,运用富集系数法...
Groundwater pollution sources were analyzed using PMF and PCA-APCS-MLR models, and their applicability in groundwater pollution assessment in Tongchuan City was tested. Results indicate that both models identified four sources of groundwater contamination. Natural evolution was the main cause of ground...
The PCA-MLR results remained the most stable in both aspects. FA-NNC and PMF performed better in regards to the stability of contribution rates and source profiles, respectively. Improvements in the goodness of fit of overall and individual pollutants were always accompanied by a decrease in the...
Both the APCS-MLR and PMF models identified agricultural nonpoint source pollution, urban nonpoint source pollution and rural domestic pollution, and meteorological factors. The sum of these three sources was very close, accounting for 60% and 58%, respectively. The APCS-MLR results demonstrated ...
分布特征来源解析为明确典型矿业活动区浅层地下水多环芳烃(PAHs)污染特征及来源,通过水样采集与测试分析,综合采用多元统计分析方法,正矩阵因子分解(PMF)和绝对主成分得分-多元线性回归(APCS-MLR)模型,研究了某煤矿区地下水中PAHs的分布特征与影响因素,污染来源及贡献率.结果表明:研究区地下水中PAHs的总浓度为12.65~...