Potentially toxic metals in the high-biomass non-hyperaccumulating plant amaranthus viridis: human health risks and phytoremediation potentials by Yap, Chee Kong, Yaacob, Aziran, Tan, Wen Siang, Al-Mutairi, Khalid Awadh, Cheng, Wan Hee, Wong, Koe Wei, Berandah Edward, Franklin, Ismail, Mohamad Saupi, You, Chen-Feng, Chew, Weiyun, Nulit, Rosimah, Ibrahim, Mohd Hafiz, Amin, Bintal, Sharifinia, Moslem