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Within the initial 3 days of PAC addition, direct PAC adsorption enhanced the removal of aromatic compounds with high UV absorbance at 254 nm, which are high molecular weight (MW) DOM, like humic acid. However, PAC adsorption was inefficient in removal of small molecules with MW less than 500 Da (Zhao et al., 2006), like amino
2. Urban sewage treatment chemicals 3. Industrial wastewater, sewage, sludge treatment solution and their solid substance recycling 4. Wastewater treatment solutions for industrial sewage that is difficult to deal with; composite polyaluminium chloride (PAC added with some other chemical regents) can be used to achieve better performance.
