Chemical fractionation and risk assessment of trace elements in sewage sludge generated from various states of Pakistan

Umair Riaz^*, Ghulam Murtaza, Saifullah, Muhammad Farooq, Humera Aziz, Ayesha Abdul Qadir, Shahzada Munawar Mehdi, Muhammad Akram Qazi

^*المؤلف المقابل لهذا العمل