再力花处理河涌和湖泊水样有机污染物及离子的特性

为了明确河涌和湖泊水样中COD、TP、TN和阴阳离子的植物处理效果,以及含氮污染物的植物转化规律,以前期研究中选育的再力花处理了广州市某河涌和暨南大学明湖水样.结果证明,再力花能有效地促进河涌和湖泊水样中TN、COD_Cr和TP的去除.处理144h后,河涌水样初始浓度为11.15mg·L^-1、45mg·L^-1和1.17mg·L^-1的TN、COD_Cr和TP分别降至3.21mg·L^-1、15.8mg·L^-1和0.53mg·L^-1;湖水初始浓度为4.50mg·L^-1、36mg·L^-1和0.25mg·L^-1的TN、COD_Cr和TP分别降至2.31mg·L^-1、11.7mg·L^-1和0.03mg·L^-1.水样中的微生物和再力花均能去除NH₄⁺,并引起水中还原态氮发生亚硝化和硝化,但是不会明显改变Cl^-、SO₄^2-、Na⁺、K⁺、Mg²⁺和Ca²⁺等离子的浓度.

Treatment of organic pollutants and ions in water of urban river and lake by Thalia dealbata

In order to determine the removal efficiency of COD,TP,TN,cations and anions by plant,and illustrate the transfer mechanism of nitrogen-containing pollutants,Thalia dealbata was used to treat the water samples collected from an urban river in Guangzhou and a lake at Jinan University.The results indicated that T.dealbata could improve the removal ratios of COD,TP and TN.After the urban river water samples were treated for 144 h,the concentrations of TN,CODCrand TP were decreased from 11.15 mg L-1,45 mg L-1 and 1.17 mg L-1to 3.21 mg L-1,15.8 mg L-1 and 0.53 mg L-1,respectively.After the lake water samples were treated for 144 h,they were reduced from 4.50 mg L-1,36 mg L-1 and 0.25 mg L-1 to 2.31 mg L-1,11.7 mg L-1 and 0.03 mg L-1,separately.Moreover,the indigenous microorganisms and T.dealbata could remove NH4+ effectively,and induced nitrosification and nitrification.However,they did not change the levels of Cl-,SO42-,Na+,K+,Mg2+and Ca2+.