Leachate is one of the major problems to overcome in managing the landfill.
Treatment that low cost, need less maintenance and environmental friendly are the
target on how to treat the leachate. This research was focused on the capability of the
magnetic technology to remove pollutant combined with constructed wetland. The
study carried out through two type of systems, which were pre-treatment magnetic
field with wetland (PTM-W) and continuous circulation magnetic field with wetland
(CRM-W). A PTM-W system consists of two stages of treatments which are pretreatment
using magnetic field (PTM) followed by treatment using wetland. The
circulation flowrate for pre-treatment and CRM-W were fixed to 1.8 mL/s with
exposure time of 6 hours fabricated from 6 paired of magnet with strength 0.55
Tesla. The constructed wetlands were planted with Eichhornia crassipes (floating
type). The efficiency of the systems to reduce the concentration of orthophosphorus,
nitrate nitrogen, ammonia nitrogen, BOD, COD, ferum and manganese were
analysed, whilst, heavy metal uptakes was analyst in plant tissues. From the study it
was found that the wetland is significantly contributed in removal efficiency of BOD,
orthophosphorus and nitrate nitrogen. Circulation with magnet has the ability to
reduce time of treatment in removal efficiency of COD, ammonia nitrogen, ferum
and manganese. The results showed CRM-W systems can reduce up to 60% of
ammonia nitrogen removal, 68.7 % of ferum and 60% of manganese after 6 hours of
treatment). Wetland was able to remove 99% of nitrate nitrogen, 96% of ammonia
nitrogen and 83% of BOD after end of experiment. It can be conclude that magnetic
field posed a great role in removing heavy metal, whilst wetland has a great ability in
removing orthophosphorus, nitrate nitrogen, ammonia nitrogen, BOD and COD.