###### Abstract  
Heavy metals accumulation from industrial wastewater even at low concentrations can cause long term cumulative health effects. To overcome this problem, phytoremediation is an alternative method to treat industrial wastewater. In this study, _Ipomoea aquatica_ and _Centella asiatica_ were used as phytoremediation plants for removing aluminum (Al) and iron (Fe) from industrial wastewater. The results showed that the regression value (\(R^{2}\)) for all metal concentrations (mg/L) over treatment day is positive and similar to \(R^{2}=1\). This result indicated that the metal concentration exhibits a good relationship for reflecting the decrease in the metal concentration with the proportion of treatment day. It was found that _I. aquatica_ accumulates higher Al and Fe contents than _C. asiatica_. The translocation factor of both plants was found to be greater than 1, implying that both plants can accumulate and extract heavy metals from industrial wastewater. p 202020010399  
Phytoremediation refers to technologies that use various plants to stabilize, remove, or destroy environmental contaminants. Basically, phytoremediation functions via the ability of plants to translocate, accumulate, and restore or degrade pollutants [13; 14]. [PERSON] et al. [15] and [PERSON] et al. [16] have independently reported that phytoremediation is defined as green-plant engineering that can destroy, restore, and reduce heavy metals and trace elements from the environment. Although several studies on phytoremediation have been performed in Malaysia, further study is still required to enhance the understanding of this alternative technology. Research on the variety of plants, type of medium, pollutant specification, and analysis costs needs to be conducted before implementation to ensure the maximum outcomes. [PERSON] et al. [17] reported that heavy-metal extraction is affected by the ability of plants to accumulate heavy metals, soil concentration and physicochemical characteristics, and the strength of the metallic bond in soil. In Malaysia, Environmental Quality (Sewage and Industrial Effluents) Regulation and Drinking Water Quality Standards have been adopted by water regulatory bodies. Wastewater and effluent discharge must satisfy the prescribed criteria before its release to water sources. Therefore, phytoremediation for wastewater treatment is crucial as it can accumulate heavy metals from contaminated water [18; 19]. [PERSON] et al. [20] and [PERSON] and [PERSON] [21] have independently reported that phytoremediation plants can accumulate heavy metals from contaminated soils. [PERSON] et al. [7] reported that several plant species are suitable for use as pollutant removal agents. [PERSON] et al. [14] have used _Centella asiatica_ for the removal of heavy metals from soil samples, while [PERSON] et al. [22] have examined the ability of _Acacia mangium_ for the removal of heavy metals from sewage sludge. _Hibiscus cannabinus_ has been used to remove Pb from contaminated soil [23], while _Amaranthus panicatus_ and _Brassica juncea_ have been used by [PERSON] et al. [20] to treat Pb- and Cu-contaminated soil. [PERSON] et al. [24] have used _Nymphaea spontanea_ to remove Cu from plating industrial effluents. Besides, [PERSON] et al. [25] have used _N. olercea_ and _E. crassipes_ to treat wastewater contaminated with Pb, Cd, and Cu. Their results revealed that _N. olercea_ is more efficient than _E. crassipes_ for accumulating the selected heavy metals. _Pistia stratiotes_ and _E. crassipes_ have been used to treat aquaculture wastewater from a fish pond in Semanggool, Perak [26]. [PERSON] et al. [27] have used _Chlorella vulgaris_ to treat wastewater released from the textile industry. [PERSON] et al. [28] have used several plant species such as _Plragmites australis_, _Imperata cylindrica_, _Cyperus rotundus_, _Nelumbo uncifera_, and _Pteris vittata_ to remove heavy metals from tin ore remnants in Bestari Jaya, Selangor. In this study, the effectiveness of _Ipomoea aquatica_ and _C.