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为了更好地了解氯消毒饮水后三卤甲烷（ＴＨＭｓ）的形成以及更有效地控制ＴＨＭｓ的产生，以腐植酸（ＨＡ）作为ＴＨＭｓ的前体，观察了光照及自由基对氯化ＨＡ后ＴＨＭｓ形成的影响。结果显示，消毒前光照含ＴＨＭｓ前体的溶液，可促进ＴＨＭｓ的形成，光照３０ｍｉｎ时达最高，后随光照时间延长而减少；消毒后光照，则ＴＨＭｓ产量逐渐减少，这与水中的氯被分解破坏有关；ＴＨＭｓ产量与光源发射的波长成反比。ＨＡ溶液中含有半醌类自由基，且其消长与ＴＨＭｓ产量有直接关系。
To better understand the formation of trihalomethanes (THMs) after chlorine-disinfecting drinking water and to more effectively control the production of THMs, humic acid (HA) was used as a precursor of THMs. Light and free radicals were observed for THMs after chlorination of HA. The impact of the formation. The results showed that pre-sterilization solutions containing THMs precursors promoted the formation of THMs, reached the maximum at 30 min, and decreased with the extension of the illumination time; after irradiation, the THMs production gradually decreased, which was related to the decomposition of chlorine in water. Damage is related; THMs production is inversely proportional to the wavelength emitted by the light source. The HA solution contains semiquinone free radicals, and its growth is directly related to the production of THMs.