Baig Shams Ali, Lou Zimo, Baig Muzaffar Ali, Qasim Muhammad, Shams Dilawar Farhan, Mahmood Qaisar, Xu Xinhua
Department of Environmental Sciences, Abdul Wali Khan University, Mardan, 23200, Pakistan.
Department of Environmental Sciences, COMSATS Institute of Information Technology (CIIT), Abbottabad, 22060, Pakistan.
Environ Monit Assess. 2017 Apr;189(4):194. doi: 10.1007/s10661-017-5907-5. Epub 2017 Mar 29.
Corrosion deposits formed within drinking water distribution systems deteriorate drinking water quality and resultantly cause public health consequences. In the present study, an attempt was made to investigate the concurrent conditions of corrosion scales and the drinking water quality in selected water supply schemes (WSS) in districts Chitral, Peshawar, and Abbottabad, northern Pakistan. Characterization analyses of the corrosion by-products revealed the presence of α-FeOOH, γ-FeOOH, FeO, and SiO as major constituents with different proportions. The constituents of all the representative XRD peaks of Peshawar WSS were found insignificant as compared to other WSS, and the reason could be the variation of source water quality. Well-crystallized particles in SEM images indicated the formation of dense oxide layer on corrosion by-products. A wider asymmetric vibration peak of SiO appeared only in Chitral and Abbottabad WSS, which demonstrated higher siltation in the water source. One-way ANOVA analysis showed significant variations in pH, turbidity, TDS, K, Mg, PO, Cl, and SO values, which revealed that these parameters differently contributed to the source water quality. Findings from this study suggested the implementation of proper corrosion prevention measures and the establishment of international collaboration for best corrosion practices, expertise, and developing standards.
饮用水分配系统中形成的腐蚀沉积物会使饮用水质量恶化，进而导致公共卫生问题。在本研究中，试图调查巴基斯坦北部奇特拉尔、白沙瓦和阿伯塔巴德地区选定供水方案（WSS）中腐蚀垢和饮用水质量的并发状况。腐蚀副产物的表征分析表明，主要成分有α-FeOOH、γ-FeOOH、FeO和SiO，比例各不相同。与其他供水方案相比，白沙瓦供水方案所有代表性XRD峰的成分不显著，原因可能是源水水质的变化。扫描电子显微镜图像中结晶良好的颗粒表明腐蚀副产物上形成了致密的氧化层。SiO较宽的不对称振动峰仅出现在奇特拉尔和阿伯塔巴德供水方案中，这表明水源中的淤积程度较高。单因素方差分析表明，pH值、浊度、总溶解固体、钾、镁、磷酸根、氯和硫酸根值存在显著差异，这表明这些参数对源水水质的影响各不相同。本研究结果建议实施适当的腐蚀预防措施，并建立国际合作，以获取最佳腐蚀实践、专业知识并制定标准。
