当前位置: X-MOL 学术Carbonates Evaporites › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Groundwater quality for drinking and agricultural purposes, Saleh Abad (NE Iran): geochemical and statistical approaches
Carbonates and Evaporites ( IF 1.1 ) Pub Date : 2021-07-20 , DOI: 10.1007/s13146-021-00720-x
Ali Mahaqi 1
Affiliation  

A hydrochemical campaign was carried out to evaluate groundwater chemical composition in Saleh Abad, NE Iran, in 2019. There were just 12 shallow wells which almost all people and their agricultural practices largely depend on them. physiochemical parameters including main cations and anions, electrical conductivity, total dissolved solids, and total hardness were measured. Based on the chemical analysis of samples, the mean concentration of dissolved cations is in order of Mg > Na > Ca > K and for anionic species, the order is as follows: Cl > HCO3 > SO4 > CO3. Piper diagram revealed that the predominant water type is Ca–Mg–Cl–SO4, and the Gibbs diagram showed that the main contributing factor in current chemical composition is water–rock interactions. Also, the correlation coefficient results emphasized the importance of water–rock interactions in altering the chemistry of groundwater. This index explained that not only carbonate mineral phases, but also gypsum and anhydrite are responsible for the high content of Ca, Mg, HCO3, and SO4. And this idea supports by the composite diagrams’s results. Additionally, man-made factors such as sewage effluent and farmland return flow have an impact on the water quality as more than 50% of samples had nitrate concentration more than the safe limit, 45 ppm. For agricultural purposes, related indexed calculated. Adsorption ratio shows that all wells are placed in the excellent category, and based on the US salinity diagram, C3S1 is the predominant that represents water with low sodium. The sodium percentage displayed that most samples are within the good classification. What is more, water samples are characterized by good category with regard to residual sodium carbonate. Totally, SA water groundwater is relatively suitable for most soil types with the minor danger of sodium exchange processes that reduce soil permeability. Decreasing soil permeability has a significant harmful effect on crop production. Simply put, the major contributor in determining the chemical composition of Saleh Abad water resources is water–rock interactions and, to a lesser extent, anthropogenic inputs- farming lands and sewage effluent.



中文翻译:

饮用水和农业用地下水质量,萨利赫阿巴德(伊朗东北部):地球化学和统计方法

2019 年,在伊朗东北部萨利赫阿巴德开展了一项水化学活动,以评估地下水化学成分。只有 12 口浅井,几乎所有人及其农业实践在很大程度上都依赖于这些浅井。测量了包括主要阳离子和阴离子、电导率、总溶解固体和总硬度在内的理化参数。根据样品的化学分析,溶解阳离子的平均浓度顺序为 Mg > Na > Ca > K,对于阴离子物种,顺序如下:Cl > HCO 3  > SO 4  > CO 3。Piper 图显示主要的水类型是 Ca-Mg-Cl-SO 4,吉布斯图表明当前化学成分的主要影响因素是水-岩相互作用。此外,相关系数结果强调了水-岩相互作用在改变地下水化学方面的重要性。该指数解释了不仅碳酸盐矿物相,而且石膏和硬石膏也是导致 Ca、Mg、HCO 3和 SO 4含量高的原因. 这个想法得到了复合图的结果的支持。此外,污水和农田回流等人为因素对水质有影响,因为超过 50% 的样本硝酸盐浓度超过安全限值 45 ppm。为农业目的,相关指数计算。吸附率显示,所有井都被归入优等类别,根据美国盐度图,C3S1 占优势,代表低钠水。钠百分比显示大多数样品在良好分类内。此外,水样在残留碳酸钠方面具有良好的特征。总体而言,SA 水地下水相对适合大多数土壤类型,钠交换过程会降低土壤渗透性的危险较小。降低土壤渗透性对作物生产具有显着的有害影响。简而言之,决定萨利赫阿巴德水资源化学成分的主要因素是水-岩相互作用,在较小程度上是人为投入——耕地和污水。

更新日期:2021-07-20
down
wechat
bug