A preparation method and application of an adsorbent for treating lead-containing wastewater

Abstract

The invention relates to a preparation method and application of an adsorbent for treating lead-containing waste water, and belongs to the technical field of heavy metal wastewater treatment. The preparation method comprises the following steps: performing pretreatment on phosphogypsum, modifying phosphogypsum by adopting a sodium dodecyl benzene sulfonate modification technology, and performing ultrasonic treatment. The adsorbent prepared by the method can realize chemical complexation reaction with heavy metal lead ions in waste water, so as to remove the heavy metal lead ions. Phosphogypsum has a large specific surface area, and the treated phosphogypsum subjected to further improvement of the method has a relatively high adsorption capacity, so that the adsorbent becomes an excellent adsorbing material for removing lead ions. The adsorbent prepared by the invention is good in stability and high in adsorption capacity, and treated lead-containing waste water can reach discharge requirements on lead of national Integrated Wastewater Discharge Standard (GB8978-1996).

Description

technical field

[0001] The invention relates to a preparation method and application of an adsorbent for treating lead-containing wastewater, and belongs to the technical field of heavy metal wastewater treatment. Background technique

[0002] In the ecological water environment, the main sources of lead-containing wastewater are industrial wastewater discharged from electroplating, smelting, casting, pesticides, mining, dyes, petroleum, batteries, machinery, printing and other industries, and the deposition of lead-containing particles in the air in water bodies. The battery industry is the main source of lead-containing wastewater. According to reports, the loss of lead per battery produced is 4.54~6810 mg, followed by the petroleum industry producing gasoline additives. Lead belongs to the first category of water pollutants. According to national regulations, the total lead content of lead-containing wastewater must reach the maximum allowable concentration discharge stan...