基于逻辑回归分析的焦化行业地下水有机污染物分布特征及影响因素研究

Study on distribution characteristics and influence factor of groundwater organic pollutants in coking industry based on logistic regression analysis

焦化厂生产过程产生的多环芳烃等有机污染物对环境特别是对土壤和地下水造成严重危害。为了明确焦化企业在不同水文地质条件下,对地下水的影响程度,本文利用逻辑回归分析方法对河北某市25家焦化企业连续三年的地下水有机污染物监测数据进行分析研究,结果表明:(1)在300组地下水样品中检出率最高的指标为菲、芴、萘等二环芳烃,苯及氯代烃;(2)通过对企业污染源特征、入渗途径、水文地质条件、取样时间四大方面15个指标进行逻辑回归分析发现,焦化行业地下水中苯系物检出率的主要影响因素是企业所处水文地质单元,地下水水力坡度和水位埋深越小的区域,苯系物检出率越高;多环芳烃类污染物检出率与包气带中粘性土厚度成正相关;氯代烃污染与企业生产年限成正相关。本次研究成果结合焦化企业所在水文地质条件、生产工艺等特征可定性分析焦化场地地下水污染特征,也可用于指导新建焦化场地选址。

The standard system is the scientific basis for the planning and deployment of medium-and long-term standardization work of mineral geology.In this paper,a six-dimensional structural model is used to construct a technical standard system for mineral geology.The technical standard system includes 162 technical standards of 13 sub-categories in four categories:mineral geological survey,mineral geological exploration,conservation and comprehensive utilization of mineral resources,and national survey of mineral resources.It comprehensively matches the investigation and evaluation of energy and strategic mineral resources,the new round of prospecting breakthrough strategic actions and the national mineral resources national situation survey.Based on the dimensional analysis of the model,suggestions for system improvement such as strengthening the layout of general standards,improving the integration of standards,and optimizing the pattern of standard configuration are put forward.