Toxicity of Cadmium (Cd) on microalgal growth, (IC50 value) and its exertions in biofuel production
Nighat Fatima, Vinod Kumar, Krishna Kumar Jaiswal, Prateek Gururani, Sanjay Kumar, P Sethi, D Khandelwal, N Sethi, G Nordberg, L Jrup, M Berglund, C Elinder, G Nordberg, M Vanter, M Iqbal, A Saeed, S Zafar, A Rani, A Kumar, A Lal, M Pant, V Kumar, M Nanda, S Kumar, P Chauhan, M Iqbal, R Edyvean, R Aneja, G Chaudhary, S Ahluwalia, D Goyal, K Kumar, H Dahms, E Won, J Lee, K Shin, H Perales-Vela, J V; Pea-Castro, R Caizares-Villanueva, C Monteiro, M Pasula, F Malcata, R Ribeiro, S Magalhaes, F Barbosa, C Nascentes, L Campos, D Moraes, S Pereira, E Micheletti, A Zillel, A Santos, F Moradas, P Tamagnini, R De Philippis, K Chojnacka, A Chojnacki, H Gorecka, V Kumar, R Kumar, D Rawat, M Nanda, S Dickinson, M Mientus, D Frey, A Amini-Hajibashi, S Ozturk, F Shaikh, D Sengupta, M El-Halwagi, K Jaiswal, R Prasath, M Chia, A Lombardi, M Melo, C Parrish, J Yang, J Cao, G Xing, H L; Yuan, S Pinzi, P Rounce, J Herreros, Tsolakis, D Pilar, M Islam, M Magnusson, R Brown, G Ayoko, M Nabi, K Heimann, G Stansell, V Gray, S Sym, T Komprda, J Sun, J Cheng, Z Yang, K Li, J Zhou
Abstract
This study evaluated the IC50 value of cadmium against four different strains of microalgae. Chlorella sorokiniana was able to tolerate 300 mg/L of cadmium. The lipid productivity increased by 6% at 50 mg/l of Cd (II) stress. The decrease in biomass productivity was recorded with increasing concentration of Cd. The results showed that chlorophyll contents, chlorophyll a (Chl a) and chlorophyll b (Chl b) gradually decreased on increasing the concentration of Cd over 100 mg/l. The FAME composition of C. sorokiniana cultivated under Cd (II) stress and control medium were analyzed to determine the quality of the biodiesel produced. The major fatty acids present in the TAGs of the treated microalga were C10:0, C12:0, and C15:0.