Heavy metal ion collecting agent

Abstract

The invention discloses a heavy metal ion collecting agent, and belongs to the technical field of water treatment. Comprising the following raw materials in parts by weight: 6 to 12 parts of sodium diethyl dithiocarbamate, 10 to 20 parts of sodium dibutyl dithiophosphate, 12 to 21 parts of sodium dimethyl dithiocarbamate, 1 to 4 parts of sodium nitrite, 3 to 8 parts of ethylenediamine tetraacetic acid, 5 to 10 parts of iron oxyhydroxide and 25 to 63 parts of water. The flocculant shows excellent trapping performance on a water sample containing nickel, cobalt, lead, cadmium, chromium, chromium, zinc and the like in a pH value range of 0-6 in a normal-temperature environment, and has the advantages that the treatment effect is good, the floc settling speed is high, other alkaline agents do not need to be additionally added, and the like.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a heavy metal ion collector. Background technique [0002] At present, heavy metal wastewater treatment methods mainly include chemical precipitation, electrochemical method, adsorption method, membrane separation method, nanotechnology, photocatalytic technology, new mesoporous material technology and genetic engineering technology and so on. The traditional chemical precipitation method (neutralization precipitation, sulfide precipitation) has the advantages of mature technology, relatively low treatment cost and convenient management. Most enterprises still use this method to treat heavy metal wastewater; but in actual operation, there are still some Insufficient, such as direct treatment of complexed heavy metal wastewater is difficult to meet the standard discharge, need to add a complex breaker; the resulting sediment particles are small, not easy to settle, need to...

AI Technical Summary

Problems solved by technology

The traditional chemical precipitation method (neutralization precipitation, sulfide precipitation) has the advantages of mature technology, relatively low treatment cost and convenient management. Most enterprises still use this method to treat heavy metal wastewater; but in actual operation, there are still some Insufficient, such as direct treatment of complexed heavy metal wastewater is difficult to meet the standard discharge, need to add a complex breaker; the resulting sediment particles are small, not easy to settle, need to add flocculant (or coagulant) to help sedimentation; sludge production is large, The treatment cost is high, and it is easy to cause secondary pollution, etc.

The particles of sulfide precipitate are small, easy to form colloid, and solid-liquid separation is difficult; the sulfide precipitant itself remains in the water, and generates hydrogen sulfide gas when it encounters acid, resulting in secondary pollution