矿井水生态灌溉适用性评价及污染组分去除研究OA
Evaluation of ecological irrigation applicability of mine water and study on the removal of pollutant components
矿井水生态灌溉是满足煤矿区水资源供需双侧协调目标的有效途径之一.以内蒙古某矿矿井水为研究对象,采集7组矿井水样开展常规离子和主要重金属元素检测.在分析矿井水水化学特征的基础上,综合利用修正内梅罗指数法、钠吸附比(SAR(ADJ))、残余碳酸钠法(RSC)、镁危害(MH)、渗透指数(PI)和重金属综合污染指数(HPI)评价矿井水质量和生态灌溉适用性.此外,在识别矿井水污染组分基础上通过混凝、吸附、反渗透净化工艺去除污染物.结果表明,该矿矿井水主要为弱碱性淡水,水化学类型主要为HCO3-Na;矿井水中Fe、Zn、氟化物污染普遍,COD和Mn超标率为71.43％,色度、浊度和大肠杆菌的超标率为57.14％,菌落总数、Pb、As、TDS超标率均为14.29％;修正内梅罗指数介于2.45～4.75.28.57％的水样水质各为良好与较好,42.86％水样水质较差,未见优良或极差水质;71.43％的水样SAR(4DJ)介于13.44～41.15,适用灌溉.85.71％的水样RSC值＞2.5,不适用灌溉.85.71％的水样MH值介于9.47％～33.87％,适用灌溉.PI值介于125.13％～166.59％,很适用灌溉.HPI值介于8.11～70.04,重金属污染程度在可接受水平内.结合USSL和Doneen图法,大部分水样有较为严重的钠害与盐渍化趋势,灌溉时应控制Na+和HCO3-含量.采用混凝、吸附、反渗透净化工艺可有效去除矿井水中悬浮物、浊度、Fe、Zn、Mn、Na+和HCO3-等组分,从而保障矿井水生态灌溉时不会发生钠害与盐渍化.
Mine water for ecological irrigation is one of the effective ways to meet the goal that is bilaterally coordinated sup-ply and demand of water resources in coal mining areas.In this paper,the mine water of a mine in Inner Mongolia is taken as the research object,and 7 groups of mine water samples are collected to carry out the detection of conventional ions and main heavy metal elements.Based on analyzing the main ion chemical characteristics of mine water,comprehensive utiliza-tion of modified Nemerow index method,sodium adsorption ratio(SAR(ADJ)),residual sodium carbonate method(RSC),magnesium hazard(MH),permeability index(PI)and comprehensive heavy metal pollution index(HPI),mine water quality and ecological irrigation suitability are evaluated.In addition,the pollutants are removed through coagulation,adsorption,and reverse osmosis purification processes on the basis of identifying the pollution components of mine water.The results show that the mine water is mainly weak alkaline fresh water,and the water chemical type is mainly HCO3-Na;Fe,Zn and fluoride pollution are widespread in mine water,the excess rates of COD and Mn are 71.43％,the excess rates of chroma,turbidity and Escherichia coli are 57.14％,and the excess rates of total number of bacterial colonies,Pb,As,TDS are 14.29％;The modified Nemerow index ranges from 2.45 to 4.75.The water quality of 28.57％of the water samples are rated as good or better,and the water quality of 42.86％of the water samples are rated as worse without good or very poor water quality.The SAR(ADJ)of 71.43％of the water samples ranges from 13.44 to 41.15,suitable for irrigation.The RSC values of 85.71％of the water samples are over 2.5,not suitable for irrigation;The MH values of 85.71％of the water samples range from 9.47％to 33.87％,suitable for irrigation.The PI values are between 125.13％and 166.59％,which is very suitable for irrigation.The HPI values range from 8.11 to 70.04,and the heavy metal pollution levels are within acceptable levels.Combined with the USSL and Doneen diagram methods,most of the water samples have serious sodium hazard and salinization trends,and the content of Na+and HCO3-should be controlled during irrigation.Using purification process of coagulation,adsorption and reverse osmosis can effectively remove suspended solids,turbidity,Fe,Zn,Mn,Na+and HCO3-components in mine water,so as to ensure that sodium hazard and salinization will not occur during the ecological irrigation of mine water.
王浩;王淑璇;王甜甜
中煤科工西安研究院(集团)有限公司,陕西西安 710054
环境科学
矿井水水质特征综合评价灌溉适用性污染物去除
mine waterwater quality characteristicscomprehensive evaluationirrigation suitabilitycontaminant remov-alNemerow turbidity
《陕西煤炭》 2024 (007)
30-37 / 8
中煤科工西安研究院(集团)有限公司创新基金顶层设计项目(2020XAYDC03)
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