2011 5th International Conference on Bioinformatics and Biomedical Engineering 2011
DOI: 10.1109/icbbe.2011.5780708
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Notice of Retraction: Characteristic and Speciation of pH in Shallow Groundwater in the Pearl River Delta

Abstract: Through testing the pH values of over two thousand groups of groundwater samples from the Pearl River Delta, water acidification was found to be one of the most outstanding groundwater environmental problems in the region. 76.3% of the whole region was covered by the acidic groundwater. The pH value distribution of the groundwater in the region was characterized by obvious regional differences. The groundwater in hilly areas was mainly acidic with the pH values centralized between 5.6 and 6.4; while the ground… Show more

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Cited by 3 publications
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“…To study the dynamic compressive and tensile strength of coal samples, cylindrical samples and Brazilian disc samples were made, respectively. In order to simulate the actual situation of natural water solution, referring to Zhang et al [24], the lower limit of the pH value under acidic condition is 4, and the upper limit of the pH value under alkaline condition is 9.…”
Section: Specimen Preparationmentioning
confidence: 99%
“…To study the dynamic compressive and tensile strength of coal samples, cylindrical samples and Brazilian disc samples were made, respectively. In order to simulate the actual situation of natural water solution, referring to Zhang et al [24], the lower limit of the pH value under acidic condition is 4, and the upper limit of the pH value under alkaline condition is 9.…”
Section: Specimen Preparationmentioning
confidence: 99%
“…In order to study the dynamic compressive and tensile strength of the coal samples, cylindrical specimens and Brazilian disc specimens were prepared, respectively. To simulate the actual conditions of natural aqueous solutions, the lower limit of pH under acidic conditions was 2 with reference to Zhang et al [23], and three types of water retention solutions were used: distilled water with pH � 7, acidic solution with pH � 4, and acidic solution with pH � 2. e mineral composition of the coal samples was determined, and then the coal samples were immersed in different pH values (pH � 7, 4, and 2) for 5, 10, 15, 20, and 25 dry and wet cycles. After the cycles, dynamic compression and tensile tests were performed on saturated samples and dry samples dried for 24 hours.…”
Section: Specimen Preparationmentioning
confidence: 99%
“…The lake covers 31.9 km 2 . It is 12.7 km long from north to south [2], 2.5 km wide from east to west and the average depth is 22 m. The water in the lake is rated GradeⅡwhich makes it an important source of drinking water for hundreds of thousands of people in Kunming Yiliang County until the Singapore's foreign investment built two 18-hole standard golf courses on the steep terrain nearby the Yangzonghai Lake in 1996. It was made up of 2 parts: the mountain scenic and the lake scenic.…”
Section: Introductionmentioning
confidence: 99%