1. Core parameters of activated carbon for water purification
| Parameters |
Standard requirements |
Application value |
| Iodine adsorption value |
≥1000 mg/g |
Remove small molecule organic matter (phenol, humic acid) |
| Carbon tetrachloride adsorption rate |
≥60% |
Characterize the adsorption capacity of VOCs/pesticides |
| Methylene blue adsorption value |
≥150 mg/g |
Key indicators of decolorization capacity (printing and dyeing wastewater) |
| Particle size |
8-30 mesh (columnar carbon) |
Balance adsorption rate and pressure drop |
2. Typical application scenarios and cases
1. Deep purification of drinking water
Case: A city water plant upgraded its process to treat slightly polluted water sources (raw water COD 5.8mg/L, ammonia nitrogen 1.2mg/L)
Selection: coconut shell activated carbon (iodine value 1100mg/g, particle size 12-30 mesh)
Parameters: filtration rate 12m/h, contact time 15 minutes
Effect: effluent COD ≤ 2mg/L, odorous substance removal rate > 95%, ton water treatment cost increased by ￥0.08
2. Heavy metal adsorption of electroplating wastewater
Case: A circuit board factory in Guangdong treats copper-containing wastewater (Cu²⁺ 50mg/L, Ni²⁺ 30mg/L)
Selection: modified activated carbon (loaded with sulfide, specific surface area 900㎡/g)
Parameters: dynamic adsorption column empty tower flow rate 2BV/h, pH=5.5
Effect: effluent Cu²⁺ < 0.5mg/L, adsorption capacity up to 180mg/g, annual savings of ￥1.2 million in hazardous waste disposal fees
3. Household water purifier filter
Case: A certain brand of RO water purifier upgraded carbon filter (PP cotton + sintered carbon)
Selection: extruded carbon rod (iodine value 950mg/g, pore size 0.5-5nm)
Parameters: flux 2L/min, initial pressure drop <0.05MPa
Effect: residual chlorine removal rate 99.9%, organic pollutant retention rate >90%, filter life extended to 6 months
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