ADSORPTION KINETICS AND THERMODYNAMICS OF CIPROFLOXACIN FROM AQUEOUS SOLUTIONS BY MAGNETIC IRON OXIDE NANOPARTICLES MODIFIED MORINGA PODS » STED Journal

class Akismet_REST_API { /** * Register the REST API routes. */ public static function init() { if ( ! function_exists( 'register_rest_route' ) ) { // The REST API wasn't integrated into core until 4.4, and we support 4.0+ (for now). return false; } register_rest_route( 'akismet/v1', '/key', array( array( 'methods' => WP_REST_Server::READABLE, 'permission_callback' => array( 'Akismet_REST_API', 'privileged_permission_callback' ), 'callback' => array( 'Akismet_REST_API', 'get_key' ), ), array( 'methods' => WP_REST_Server::EDITABLE, 'permission_callback' => array( 'Akismet_REST_API', 'privileged_permission_callback' ), 'callback' => array( 'Akismet_REST_API', 'set_key' ), 'args' => array( 'key' => array( 'required' => true, 'type' => 'string', 'sanitize_callback' => array( 'Akismet_REST_API', 'sanitize_key' ), 'description' => __( 'A 12-character Akismet API key. Available at akismet.com/get/', 'akismet' ), ), ), ), array( 'methods' => WP_REST_Server::DELETABLE, 'permission_callback' => array( 'Akismet_REST_API', 'privileged_permission_callback' ), 'callback' => array( 'Akismet_REST_API', 'delete_key' ), ) ) ); register_rest_route( 'akismet/v1', '/settings/', array( array( 'methods' => WP_REST_Server::READABLE, 'permission_callback' => array( 'Akismet_REST_API', 'privileged_permission_callback' ), 'callback' => array( 'Akismet_REST_API', 'get_settings' ), ), array( 'methods' => WP_REST_Server::EDITABLE, 'permission_callback' => array( 'Akismet_REST_API', 'privileged_permission_callback' ), 'callback' => array( 'Akismet_REST_API', 'set_boolean_settings' ), 'args' => array( 'akismet_strictness' => array( 'required' => false, 'type' => 'boolean', 'description' => __( 'If true, Akismet will automatically discard the worst spam automatically rather than putting it in the spam folder.', 'akismet' ), ), 'akismet_show_user_comments_approved' => array( 'required' => false, 'type' => 'boolean', 'description' => __( 'If true, show the number of approved comments beside each comment author in the comments list page.', 'akismet' ), ), ), ) ) ); register_rest_route( 'akismet/v1', '/stats', array( 'methods' => WP_REST_Server::READABLE, 'permission_callback' => array( 'Akismet_REST_API', 'privileged_permission_callback' ), 'callback' => array( 'Akismet_REST_API', 'get_stats' ), 'args' => array( 'interval' => array( 'required' => false, 'type' => 'string', 'sanitize_callback' => array( 'Akismet_REST_API', 'sanitize_interval' ), 'description' => __( 'The time period for which to retrieve stats. Options: 60-days, 6-months, all', 'akismet' ), 'default' => 'all', ), ), ) ); register_rest_route( 'akismet/v1', '/stats/(?P[\w+])', array( 'args' => array( 'interval' => array( 'description' => __( 'The time period for which to retrieve stats. Options: 60-days, 6-months, all', 'akismet' ), 'type' => 'string', ), ), array( 'methods' => WP_REST_Server::READABLE, 'permission_callback' => array( 'Akismet_REST_API', 'privileged_permission_callback' ), 'callback' => array( 'Akismet_REST_API', 'get_stats' ), ) ) ); register_rest_route( 'akismet/v1', '/alert', array( array( 'methods' => WP_REST_Server::READABLE, 'permission_callback' => array( 'Akismet_REST_API', 'remote_call_permission_callback' ), 'callback' => array( 'Akismet_REST_API', 'get_alert' ), 'args' => array( 'key' => array( 'required' => false, 'type' => 'string', 'sanitize_callback' => array( 'Akismet_REST_API', 'sanitize_key' ), 'description' => __( 'A 12-character Akismet API key. Available at akismet.com/get/', 'akismet' ), ), ), ), array( 'methods' => WP_REST_Server::EDITABLE, 'permission_callback' => array( 'Akismet_REST_API', 'remote_call_permission_callback' ), 'callback' => array( 'Akismet_REST_API', 'set_alert' ), 'args' => array( 'key' => array( 'required' => false, 'type' => 'string', 'sanitize_callback' => array( 'Akismet_REST_API', 'sanitize_key' ), 'description' => __( 'A 12-character Akismet API key. Available at akismet.com/get/', 'akismet' ), ), ), ), array( 'methods' => WP_REST_Server::DELETABLE, 'permission_callback' => array( 'Akismet_REST_API', 'remote_call_permission_callback' ), 'callback' => array( 'Akismet_REST_API', 'delete_alert' ), 'args' => array( 'key' => array( 'required' => false, 'type' => 'string', 'sanitize_callback' => array( 'Akismet_REST_API', 'sanitize_key' ), 'description' => __( 'A 12-character Akismet API key. Available at akismet.com/get/', 'akismet' ), ), ), ) ) ); } /** * Get the current Akismet API key. * * @param WP_REST_Request $request * @return WP_Error|WP_REST_Response */ public static function get_key( $request = null ) { return rest_ensure_response( Akismet::get_api_key() ); } /** * Set the API key, if possible. * * @param WP_REST_Request $request * @return WP_Error|WP_REST_Response */ public static function set_key( $request ) { if ( defined( 'WPCOM_API_KEY' ) ) { return rest_ensure_response( new WP_Error( 'hardcoded_key', __( 'This site\'s API key is hardcoded and cannot be changed via the API.', 'akismet' ), array( 'status'=> 409 ) ) ); } $new_api_key = $request->get_param( 'key' ); if ( ! self::key_is_valid( $new_api_key ) ) { return rest_ensure_response( new WP_Error( 'invalid_key', __( 'The value provided is not a valid and registered API key.', 'akismet' ), array( 'status' => 400 ) ) ); } update_option( 'wordpress_api_key', $new_api_key ); return self::get_key(); } /** * Unset the API key, if possible. * * @param WP_REST_Request $request * @return WP_Error|WP_REST_Response */ public static function delete_key( $request ) { if ( defined( 'WPCOM_API_KEY' ) ) { return rest_ensure_response( new WP_Error( 'hardcoded_key', __( 'This site\'s API key is hardcoded and cannot be deleted.', 'akismet' ), array( 'status'=> 409 ) ) ); } delete_option( 'wordpress_api_key' ); return rest_ensure_response( true ); } /** * Get the Akismet settings. * * @param WP_REST_Request $request * @return WP_Error|WP_REST_Response */ public static function get_settings( $request = null ) { return rest_ensure_response( array( 'akismet_strictness' => ( get_option( 'akismet_strictness', '1' ) === '1' ), 'akismet_show_user_comments_approved' => ( get_option( 'akismet_show_user_comments_approved', '1' ) === '1' ), ) ); } /** * Update the Akismet settings. * * @param WP_REST_Request $request * @return WP_Error|WP_REST_Response */ public static function set_boolean_settings( $request ) { foreach ( array( 'akismet_strictness', 'akismet_show_user_comments_approved', ) as $setting_key ) { $setting_value = $request->get_param( $setting_key ); if ( is_null( $setting_value ) ) { // This setting was not specified. continue; } // From 4.7+, WP core will ensure that these are always boolean // values because they are registered with 'type' => 'boolean', // but we need to do this ourselves for prior versions. $setting_value = Akismet_REST_API::parse_boolean( $setting_value ); update_option( $setting_key, $setting_value ? '1' : '0' ); } return self::get_settings(); } /** * Parse a numeric or string boolean value into a boolean. * * @param mixed $value The value to convert into a boolean. * @return bool The converted value. */ public static function parse_boolean( $value ) { switch ( $value ) { case true: case 'true': case '1': case 1: return true; case false: case 'false': case '0': case 0: return false; default: return (bool) $value; } } /** * Get the Akismet stats for a given time period. * * Possible `interval` values: * - all * - 60-days * - 6-months * * @param WP_REST_Request $request * @return WP_Error|WP_REST_Response */ public static function get_stats( $request ) { $api_key = Akismet::get_api_key(); $interval = $request->get_param( 'interval' ); $stat_totals = array(); $response = Akismet::http_post( Akismet::build_query( array( 'blog' => get_option( 'home' ), 'key' => $api_key, 'from' => $interval ) ), 'get-stats' ); if ( ! empty( $response[1] ) ) { $stat_totals[$interval] = json_decode( $response[1] ); } return rest_ensure_response( $stat_totals ); } /** * Get the current alert code and message. Alert codes are used to notify the site owner * if there's a problem, like a connection issue between their site and the Akismet API, * invalid requests being sent, etc. * * @param WP_REST_Request $request * @return WP_Error|WP_REST_Response */ public static function get_alert( $request ) { return rest_ensure_response( array( 'code' => get_option( 'akismet_alert_code' ), 'message' => get_option( 'akismet_alert_msg' ), ) ); } /** * Update the current alert code and message by triggering a call to the Akismet server. * * @param WP_REST_Request $request * @return WP_Error|WP_REST_Response */ public static function set_alert( $request ) { delete_option( 'akismet_alert_code' ); delete_option( 'akismet_alert_msg' ); // Make a request so the most recent alert code and message are retrieved. Akismet::verify_key( Akismet::get_api_key() ); return self::get_alert( $request ); } /** * Clear the current alert code and message. * * @param WP_REST_Request $request * @return WP_Error|WP_REST_Response */ public static function delete_alert( $request ) { delete_option( 'akismet_alert_code' ); delete_option( 'akismet_alert_msg' ); return self::get_alert( $request ); } private static function key_is_valid( $key ) { $response = Akismet::http_post( Akismet::build_query( array( 'key' => $key, 'blog' => get_option( 'home' ) ) ), 'verify-key' ); if ( $response[1] == 'valid' ) { return true; } return false; } public static function privileged_permission_callback() { return current_user_can( 'manage_options' ); } /** * For calls that Akismet.com makes to the site to clear outdated alert codes, use the API key for authorization. */ public static function remote_call_permission_callback( $request ) { $local_key = Akismet::get_api_key(); return $local_key && ( strtolower( $request->get_param( 'key' ) ) === strtolower( $local_key ) ); } public static function sanitize_interval( $interval, $request, $param ) { $interval = trim( $interval ); $valid_intervals = array( '60-days', '6-months', 'all', ); if ( ! in_array( $interval, $valid_intervals ) ) { $interval = 'all'; } return $interval; } public static function sanitize_key( $key, $request, $param ) { return trim( $key ); } } ADSORPTION KINETICS AND THERMODYNAMICS OF CIPROFLOXACIN FROM AQUEOUS SOLUTIONS BY MAGNETIC IRON OXIDE NANOPARTICLES MODIFIED MORINGA PODS » STED Journal

Mokete John Phele^1,2, Fanyana Moses Mtunzi^1,2, Joe Modise², David Shooto²,

¹Department of Chemistry, Faculty of Applied and Computer Sciences, Vaal University of Technology, Vanderbijlpark, 1911, South Africa, phelemj85@gmail.com

²Institute of Chemical and Biotechnology, Faculty of Applied and Computer Sciences, Vaal University of Technology Southern Gauteng Science and Technology Park, Sebokeng, 1983, South Africa

ORIGINAL SCIENTIFIC PAPER

ISSN 2637-2150
e-ISSN 2637-2614
UDC 612.014.46:546.562-31
DOI 10.7251/STEDZ2402010P
COBISS.RS-ID 141779201

Received: 21 October 2024.
Accepted: 11 November 2024.
Published: 29 November 2024.
http://stedj-univerzitetpim.com

Corresponding Author:
Mokete John Phele, Department of Chemistry, Faculty of Applied and Computer Sciences, Vaal University of Technology, Vanderbijlpark, 1911, South Africa, phelemj85@gmail.com

Copyright © 2024 Mokete John Phele, et al.; published by UNIVERSITY PIM. This work licensed under the Creative Commons Attribution-NonCommercial-NoDerivs 4.

Citation:
Phele, M.J., Moses Mtunzi, F., Modise, J., & Shooto, D. (2024). Adsorption vinetics and thermodynamics of ciprofloxacin from aqueous solutions by magnetic iron oxide nanoparticles modified Moringa pods. STED Journal, 6(2), 10-24.

ABSTRACT

The adsorption process of metal oxide nanoparticles has been studied as an effective means of removing organic and inorganic contaminants from water and wastewater. In this study, iron (III) oxide (Fe3O4) nanoparticles were synthesized in the presence of moringa oleifera pods (MOP) as an adsorbent for ciprofloxacin (CIP) adsorption. Moringa oleifera pod biochar with Fe3O4 particles precipitated on the surface of biochar was synthesized by co-precipitation method. The effect of various parameters such as contact time, pH, metal concentration and adsorbent dosage on the removal efficiency was determined. The maximum adsorption capacity of CIP by magnetic moringa composite (MMC) was 96.12 mg/g. The Langmuir and Freundlich isotherm equations were used to analyze the equilibrium isotherm data. The adsorption process fit well with the second-order kinetics in all cases, and the Langmuir isotherm equation fitted well with the experimental data.

Keywords: Moringa Oleifera, Iron oxide, Ciprofloxacin, Nanoparticles.