Optimizing composite mineral materials for efficient treatment of cotton pulp black liquor

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation Pub Date : 2025-07-20 DOI:10.1016/j.eti.2025.104396

Yanlei Zhang , Yi Yang , Yue Deng , Hao Zhang , Shuo Zhang , Jiaping Wang , Chaoqun Chen , Hongbo Ling

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引用次数: 0

Abstract

Cotton pulp black liquor (CPBL), a challenging pollutant from cotton linter pulping, exhibits high chroma, alkaline pH, and low biodegradability, rendering conventional treatment methods inefficient and costly. In this study an optimized composite mineral adsorbent (OCMA) was developed using natural minerals, which enhanced its capacity to remove chemical oxygen demand (COD), ammonia nitrogen, and chroma through compositional optimization. Experimental results showed the maximum removal efficiency of 96 % for decolorization, 93 % for COD reduction, and for 80 % ammonia nitrogen elimination under optimal conditions (3:1 adsorbent ratio, 0.8 g/L dosage, 25 °C, pH 7). A comprehensive characterization via SEM, BET, FTIR, and XRD analyses revealed the structural and mechanistic basis for the enhanced performance of OCMA. The innovative mineral composite design overcomes traditional process limitations, providing an efficient and eco-friendly solution for recalcitrant wastewater treatment. This work demonstrates significant potential for environmental remediation and sustainable resource utilization, highlighting its simple operation, cost-effectiveness, and high treatment efficiency in addressing the critical challenges in industrial wastewater management.

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优化复合矿物材料高效处理棉浆黑液

棉浆黑液（CPBL）是棉棉制浆过程中产生的一种具有挑战性的污染物，具有高色度、碱性、低生物降解性等特点，使得传统的处理方法效率低、成本高。本研究以天然矿物为原料制备了一种优化的复合矿物吸附剂（OCMA），通过对其成分的优化，提高了其去除化学需氧量（COD）、氨氮和色度的能力。实验结果表明，在吸附剂比为3:1、投加量为0.8 g/L、温度为25℃、pH为7的条件下，脱色效率最高为96 %，COD去除率最高为93 %，氨氮去除率最高为80 %。通过SEM， BET， FTIR和XRD分析，揭示了OCMA性能增强的结构和机理基础。创新的矿物复合设计克服了传统工艺的限制，为顽固的废水处理提供了高效环保的解决方案。该方法操作简单，成本效益高，处理效率高，在解决工业废水管理中的关键挑战方面具有重要的环境修复和资源可持续利用潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Environmental Technology & Innovation Environmental Science-General Environmental Science

CiteScore

14.00

自引率

4.20%

发文量

435

审稿时长

74 days

期刊介绍： Environmental Technology & Innovation adopts a challenge-oriented approach to solutions by integrating natural sciences to promote a sustainable future. The journal aims to foster the creation and development of innovative products, technologies, and ideas that enhance the environment, with impacts across soil, air, water, and food in rural and urban areas. As a platform for disseminating scientific evidence for environmental protection and sustainable development, the journal emphasizes fundamental science, methodologies, tools, techniques, and policy considerations. It emphasizes the importance of science and technology in environmental benefits, including smarter, cleaner technologies for environmental protection, more efficient resource processing methods, and the evidence supporting their effectiveness.