主题：转贴：水中合成有机污染物的来源及处理

水中合成有机污染物的来源及处理

　

Source
Over 1000 SOC's (Synthetic Organic Chemicals) have been detected in drinking water at one time or another. Most are of no concern, but some are potentially a health risk to consumers. Below is a list of synthetic organic chemicals along with the proposed MCL (maximum contamination level) in mg/L as determined by the US EPA Primary Drinking Water Regulations.

Synthetic Organic Chemicals (Proposed MCL, mg/l)

Acrylamide (0.0005)丙烯酰胺
Alachlor (0.002)甲草胺
Aldicarb (0.01)涕灭威
Aldicarb sulfoxide (0.01)涕灭威亚砜
Aldicarb sulfone (0.04)涕灭威砜
Atrazine (0.002)莠去津
Carbofuran (0.04)克百威
Chlordane (0.02)可氯丹
Dichloroethylene (0.07)二氯乙烯
DBCP (0.0002)1,2-二溴-3-氯丙烷
Dichioropropane (0.005)二氯丙烷
Dichlorobenzene (0.6)二氯(代)苯
D (0.1)2，4滴
EDB (0.00005)二溴化乙烯
Epichlorohydrin (0.002)表氯醇
Ethylbenzene (0.7)乙苯
Heptachlor (0.0004)七氯
Heptachlor epoxide (0.0002)环氧七氯
Lindane (0.0002)六氯化苯, 林丹
Methoxychlor (0.4)甲氧滴滴涕
Monochlorobenzene (0.1)一氯代苯
Polychlorinated biphenyls (0.0005)多氯联苯
Pentachlorophenol (0.2)五氯苯酚
Styrene (0.005)苯乙烯
Tetrachloroethylene (0.005)四氯乙烯
Toluene (2.0)甲苯
TP (0.05)总磷
Toxaphene (0.005)毒杀芬
Dichloroethylene (0.1)二氯乙烯
Xylene (10.0)二甲苯

Treatment
Activated carbon is generally used to remove organics. Flow rates should be restricted to 2 gpm per square foot of the filter bed. Reverse osmosis will remove 98 to 99% of the organics in the water. Ultrafiltration (U7F，超滤) and nanofiltration (NF ，纳滤）both will remove organics. Anion exchange resin also retains organics, but periodically needs cleaning.