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New indicator added to Qiheng water quality determination - boron
Date: 2023-06-10Read: 0
The hazards of boron pollution
People consume 1-3 mg of boron daily from food and drinking water Boron is also an essential trace element for plant growth However, excessive intake of boron or high boron content in irrigation water can pose a threat to human health and crops. The World Health Organization (WHO) recommends Adults should not consume more than 0.16 μ g/g of boron per day. Excessive intake of boron can cause headaches, diarrhea, liver damage, and even death. Plant boron poisoning can cause yellowing and shedding of leaves. Ultimately, it will lead to a decrease in photosynthetic capacity and a decrease in yield. Therefore, it is extremely necessary to remove boron from water sources and wastewater.
Excessive boron in water may be due to urban, industrial, and chemical waste used in agriculture. In drinking water, the presence of boron is limited to 0.5ppm, while in irrigation water, the optimal concentration of boron is 0.3ppm to 0.75ppm. For sensitive crops, a concentration of 1.0ppm is considered the limit.
Environmental standards related to boron
The World Health Organization did not list boron as a toxic substance in the drinking water standards of 1958, 1963, and 1971 It was not until 1993 that a temporary limit of 0.3 mg/L was proposed for boron in drinking water. In 1998, it was set at 0.5 mg/L. After revision in 2010, it remained at that level0.5 mg/L.The latest "Sanitary Standards for Drinking Water" (GB5749-2006) stipulateboronLess than 0.5mg/L.boronExcessive levels can cause damage to the human liver and kidneys. Many countries and organizations have also established corresponding standards For example, the European Union set a limit for boron in drinking water in 19981.0 mg/LThe limit value for boron in New Zealand drinking water standards is1.4 mg/LIn summary With the development of boron industry and the increasing attention to boron pollution in water The removal of boron from water is increasingly attracting widespread attention Various methods for removing boron have become one of the research hotspots.