Multicomponent composite flocculating setting agent and use in arsenic contamination water treatment

Abstract

The invention belongs to the technical field of river water body pollution control and in particular relates to a multiple-element compound flocculating settling agent and the application of the multiple-element compounded flocculating settling agent in arsenic pollution water body treatment. The multiple-element compounded flocculating settling agent is prepared by compounding malysite, aluminium salt, hypermanganate, polyacrylamide and aqueous solution. The multiple-element compounded flocculating settling agent can be applied in the arsenic pollution water body treatment to remove arsenic in the arsenic pollutant water body. The concentration of the arsenic in the treated water can meet or is superior to the specified requirement of three types of water on the arsenic concentration in the national earth surface water environment quality standard (less than 0.05 mg/L). The invention also can be used for removing heavy metals such as copper, chromium, cadmium, lead and the like in water by sedimentation. The multiple-element compounded flocculating settling agent can be used together with a multiple-element compounded metal oxide arsenic removal setting agent in static or flowing arsenic pollution water body treatment for removing the arsenic in the water body polluted by arsenic.

Description

technical field [0001] The invention belongs to the technical field of river water pollution treatment, and in particular relates to a multi-component composite flocculation-sedimentation agent and the application of the multi-component composite flocculation-settling agent in the treatment of arsenic-polluted water bodies. Background technique [0002] The arsenic-containing wastewater produced in industrial production processes such as chemical industry, metallurgy, iron and steel, energy and minerals is an important source of water pollution. The safety of drinking water sources and water quality along the coast poses a major hidden danger to drinking water. Especially for arsenic pollution incidents caused by the discharge of some high-load arsenic-containing wastewater in a short period of time, it is more likely to have a serious impact on downstream people's lives, fishery production, and social stability due to its high pollution load and high pollution intensity. ....

AI Technical Summary

Problems solved by technology

However, for rivers polluted by arsenic, the length of the river is often in the range of tens to hundreds of kilometers, which is too wide to add arsenic-removing sedimentation agent; The settling time allowed for arsenic pollution treatment is often relatively short, often requiring several hours to tens of hours to complete the settling of arsenic

Therefore, if a multi-element compound metal oxide sedimentation agent for arsenic removal (CN200810266740: 1) is used, the sedimentation agent that has absorbed arsenic in the above-mentioned short time range is difficult to fully settle and the effect of removing arsenic is limited, and if the sedimentation agent with larger particles is formed, the sedimentation is accelerated rate is difficult to ensure the effect of adsorption and removal of arsenic

Therefore, it is difficult to effectively solve the problem of arsenic-polluted water body treatment projects in rivers by using the above-mentioned multi-component composite metal oxide arsenic-removing sedimentation agent for still water bodies such as lakes and reservoirs and its engineering technical solutions