Wastewater remediation of heavy metals and pesticides using rice straw and/or zeolite as bioadsorbents and assessment of
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Wastewater remediation of heavy metals and pesticides using rice straw and/or zeolite as bioadsorbents and assessment of treated wastewater reuse in the culture of Nile tilapia (Oreochromis niloticus) Nagham R. El Saidy & Nagwan El-Habashi & Mary M. Saied & Mohamed A. S. Abdel-Razek & Radi A. Mohamed & Ahmed M. Abozeid & Sami A. El-Midany & Fatma A. Abouelenien
Received: 25 August 2020 / Accepted: 17 November 2020 / Published online: 23 November 2020 # Springer Nature Switzerland AG 2020
Abstract The remediation of wastewater (WW) is a promising solution for limited water sources. This study aimed to evaluate rice straw (RS) and zeolite (Z) as bioadsorbents for the removal of pollutants, including heavy metals (HMs) (cadmium [Cd], nickel [Ni], and lead [Pb]) and malathion (PC), from WW and to assess the suitability of reusing remediated WW in fish rearing units. A total of 11 treatment groups with 3 replicates each were designed with different combinations of RS and/or Z for the treatment of real WW contaminated with HMs and malathion, where the WW remained in contact with the adsorbents for 24 h. Different remediated WWs were used for rearing Nile tilapia (Oreochromis niloticus), which were randomly allocated into 33 glass aquaria representing 11 treatments with 3 replicates each for
30 days. The best remediation efficiency was achieved using a mixture of whole RS (WRS), chopped RS (CRS), and Z (HM-PC-WRS-CRS-Z group), with removal percentages of 92%, 95%, 96%, and 99% for Cd, Ni, Pb, and malathion, respectively. The health status of the aquatic ecosystems was assessed through blood tests to characterize biochemical parameters and through pathological changes of cultured O. niloticus reared in treated WW. A significant (P ˂ 0.05) effect on the blood biochemistry of fish reared in treated WW was found and better biochemical and histologic architecture was observed than that of fish reared in untreated WW. A novel mixture of WRS, CRS, and Z could possibly be a promising low-cost adsorbent for wastewater treatment.
N. R. El Saidy (*) : M. M. Saied : S. A. El-Midany : F. A. Abouelenien Department of Hygiene and Preventative Medicine, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafr el-Sheikh, Egypt e-mail: [email protected]
Keywords Experimental study . Heavy metals . Nile tilapia (Oreochromis niloticus) . Pesticide . Remediation . Rice straw . Wastewater . Zeolite
Introduction N. El-Habashi Department of Veterinary Pathology, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafr el-Sheikh, Egypt M. A. S. Abdel-Razek Department of Chemistry and Toxicity of Pesticides, Faculty of Agriculture, Kafrelsheikh University, Kafr el-Sheikh, Egypt R. A. Mohamed : A. M. Abozeid Department of Aquaculture, Faculty of Aquatic and Fisheries Sciences, Kafrelsheikh University, Kafr El-Sheikh 33 516, Egypt
High-quality water is a critical issue for human life, and water of adequate quality is very important for agricultural, industrial, domestic, and commercial uses (Renge et al. 2012) and for aquacul
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