净水厂污泥覆盖控制底泥氮磷释放效果  

Efficiency of Controlling Nitrogen and Phosphorus Release From Sediment Using Thin-Layer Capping With Water Treatment Plant Sludge

作　　者：黄华山[1] 杨志敏[1] 周真明[1] 刘淑坡[1] 沈春花[1] 李飞[1] 苑宝玲[1] 

机构地区：[1]华侨大学土木工程学院,福建厦门361021

出　　处：《华侨大学学报（自然科学版）》2016年第3期347-351,共5页Journal of Huaqiao University(Natural Science)

基　　金：国家自然科学基金资助项目(51408243;51378227);福建省自然科学基金资助项目(2012J05094;2015J01213);福建省泉州市科技计划重点项目(2014Z128);华侨大学中青年教师科研提升资助计划(ZQN-PY313)

摘　　要：室内静态模拟净水厂污泥与沙、沸石、锁磷剂(镧改性膨润土Phoslock?)等4种覆盖材料控制底泥氮磷的释放效果.结果表明:在覆盖强度为2kg·m-2条件下,与对照组相比,沸石覆盖对氨氮的平均削减率为42.04%,沙覆盖和锁磷剂覆盖对氨氮均没有削减效果,净水厂污泥覆盖不仅对氨氮没有削减效果,而且还会向水体释放氨氮;锁磷剂、净水厂污泥、沸石和沙的覆盖对正磷酸盐的平均削减率分别为75.98%,53.73%,28.09%和10.69%.最后,分析几种覆盖材料控制底泥氮磷释放的可行性及存在问题,表明净水厂污泥开发为覆盖材料控制底泥磷释放是可行的.The efficiency of controlling nitrogen and phosphorus release from sediment using four capping materials（including water treatment plant sludge,sand,natural zeolite and lanthanum-modified bentonite）were evaluated through sediment incubation laboratory experiments lasted for 35 days.The results showed that,under the condition of dose rate2kg·m^-2,the average reduction efficiency of ammonia nitrogen in overlying water by zeolite capping was 42.04%,and there was no obvious effect on ammonia nitrogen reduction between sand capping and lanthanum-modified bentonite capping.More notably,water treatment plant sludge capping not only failed to control ammonia nitrogen release from sediment but also released ammonia nitrogen into overlying water.The average reduction efficiency of orthophosphate in overlying water using lanthanum-modified bentonite,water treatment plant sludge,zeolite and sand capping was 75.98%,53.73%,28.09% and 10.69%,respectively.Finally,the feasibility and difficulties were analyzed when the four capping materials were used,which indicates that the water treatment plant sludge is a feasible way for developing as a sediment capping material to control the nitrogen and phosphorus release from sediment.

关 键 词：原位覆盖 底泥 净水厂污泥 沸石 锁磷剂 氮磷 

分 类 号：X524[环境科学与工程—环境工程]